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User Manual
GNJBQ Mud Agitator
Hebei GN Solids Control Co.,Ltd
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Hebei GN Solids Control Co., Ltd (FORMERLY KNOWN AS TANGSHAN GUANNENG
MACHINERY EQUIPMENT CO., LTD). (Brand Name: GN Solids Control)Is a China API & ISO
Certified manufacturer specializing in complete line equipment & shaker screens for:
OIL&GAS Drilling----Solids Control Equipment
HDD&CBM Drilling----Mud Recycling System
Oilfield&Industrial--Drilling Waste Management
GN Solids Control is one of the most famous International Brand for Mud Solids Control & Drilling
Waste Management.
GN is the First API certified solids control equipment manufacturer in China.
GN Facilities total area is over 70,000 which is close to Beijing.
GN Products have been exported to 60 countries and regions.
GN Owns a specialized facility for making shaker screens in Asian largest wire mesh center
city.
GN Owns 10 patents for the design of Solids Control Equipment.
Up to March,2013, GN is the only China based API Certified manufacturer who provide
Vertical Cutting Dryer for drilling waste management.
Complete Line Equipments
GN System:Design & manufacture complete line equipment for a total mud system which
ensures better integration of system and competitive price.
GN Solids Control Equipments:Shale Shaker, Mud Cleaner ,Desander ,Desilter, Centrifuge,
Agitator, Mixing Hoppers, Flare Igniter, Various Tanks, Pumps, Degassers etc.
GN Drilling Waste Management:Vertical Cutting Dryer,HI-G Dryer Shaker, Decanter
Centrifuge,Screw Pumps etc
GN Main Spare Parts: Shaker Screens, Hydrocyclone Cones, Rig Mat
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Read Before Use
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CONTENTS
Complete Line Equipments ................................................................................................................ 2
Section 1-Overview ................................................................................................................................... 6
1.1 Operation Instructions .................................................................................................................. 61.2 Application ................................................................................................................................... 7
1.3 Features ........................................................................................................................................ 8
1.4 Main parameters of agitator ......................................................................................................... 8
1.5 Usage of mud agitator .................................................................................................................. 8
Section 2- Structure And Operation Principle ........................................................................................... 9
2.1 Drive Motor ............................................................................................................................... 11
2.2 Gear Drive .................................................................................................................................. 11
2.3 Impeller ...................................................................................................................................... 11
2.4 Main parts list for different agitator models .............................................................................. 12
Section 3- Model selection and Installation ............................................................................................. 14
3.1 Model selection .......................................................................................................................... 14
3.2 Operation Attentions .................................................................................................................. 14
3.3 Installation ................................................................................................................................. 15
3.4 Gearbox lubricant level .............................................................................................................. 19
3.5 Electrical connections ................................................................................................................ 20
3.6 Storage & handling .................................................................................................................... 21
Section 4- Machine start up & shutdown ................................................................................................. 22
4.1 Initial startup .............................................................................................................................. 22
4.2 Normal startup and operation ..................................................................................................... 224.3 Normal shutdown procedure ...................................................................................................... 23
4.4 Emergency shutdown ................................................................................................................. 23
Section 5- Maintenance............................................................................................................................ 24
5.1 Routine maintenance .................................................................................................................. 24
5.2 Gearbox lubrication ................................................................................................................... 24
Section 6- Troubleshooting & Solution ................................................................................................... 26
Section 7- Terms of warranty .................................................................................................................. 28
Section 8- Installation and maintenance log ............................................................................................ 30
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Section 1-Overview
This manual provides installation, operation, and maintenance instructions for GN mud
agitators. The manual is divided into several parts to assist the user inreadily accessing the
information.
Personnel responsible for transporting, installing, commissioning, operating, or performing
maintenance on this equipment are required to read and understand the instructions
provided in this manual. One copy of this manual should be available and accessible at the
equipment location.
For machine safety and performance, no additions and/or changes may be made to the
equipment without the explicit written permission of GN Solids Control. Genuine GN
repair/replacement parts are required
Fig. 1: GN agitator
1.1 Operation Instructions
All persons responsible for operation and maintenance of this equipment must read and
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understand all safety information in this manual prior to operating and/or maintaining the
equipment. The safety warnings listed below are included in applicable procedures
throughout this manual.
a.Read operation manual before operating
b.Confirm the oil level in the oil window middle position before starting up.
c. To ensure proper balance and orientation when unit is raised and prevent damage to
components, attach lifting sling only between motor and gear drive. Do not attempt Lifting
by attachment to eyebolt on motor or any other Location.
d. Lift specified lifting points to move devices! Ensure that equipment installation
fastening, reliable; Fasten all assembly bolt group once a month.
Replace lubricates in the gear box every 1000 hours, Brand of lubricating grease:
Mobil:150#.; replace grease in the motor every 2500 hours, Brand of lubricating grease:
Mobil:EP2.
e. Clarify the correct direction of agitator before usage.
f. To avoid serious personal injury of un-expected motor startup, be sure equipment is
locked out, tagged out, and de-energized prior to install / or maintenance and/oradjustments.
DO NOToperate the equipment if defective or faulty mechanical or electrical components
are detected.
1.2 Application
GN JBQ series mud agitator is one of the important equipment for mud system. It is
mainly used for agitating drilling fluids, avoid particle in fluids deposit to tank bottom.
GN does not authorize any other use of this equipment, intended usage of the equipment
includes compliance with the operating, maintenance, and safety instructions provided in
this manual
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1.3 Features
GN JBQ series mud agitator has below features:
a. Utilize worm gear reducer. Compact design, perfect joggle and reliable operation.
b. Worm gear reducer combined with explosion-proof motor, which enable stable
performance in wild severe environment.
c. Input shaft of explosion-proof motor are connected to gearbox with elastic coupling
directly, rather than belt-drive. It enables stable speed of impeller.
d. The mud agitators are high-efficiency mud-mixing units offered in a wide array of
custom sizes, and configurations to accommodate virtually any mud tank. It is to avoid
over-load of current during start up motor.
e. Horizontal type of motor. It is convenient for installation, adjustment or replacement.
1.4 Main parameters of agitator
ModelMotor power
kw
Impeller
speedrpm
Impeller dia.
mm
Impeller
Qty
Ration Ex MarksWeight
(kg)
GNJBQ030A 3
60/72
50Hz/
60Hz
650 1
25:1
EXdllBt4/
IECEX/
A-TEX
100
GNJBQ055A 6.5 850 1 250
GNJBQ075A7.5
950 1 356
GNJBQ075A-D 800 2 378
GNJBQ110A11
1050 1 479
GNJBQ110A-D 850 2 494
GNJBQ150A15
1100 1 684
GNJBQ150A-D 960 2 702
GNJBQ185A-D 18.5 1050 2 750
GNJBQ220A-D 22 1100 2 780
1.5 Usage of mud agitator
It is high-efficiency mud-mixing units offered in a wide array of custom sizes and
configurations to accommodate virtually any mud tank. The horizontal drive is designed
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for installations having limited space above the mud tank.
The mud agitator stirs mud slurry to maintain suspension of solids. The agitator is mounted
on top of the mud tank and has one or two impeller(s) immersed in the mud slurry. The
impeller shaft is coupled to an electric drive motor with coupling. iT is available in several
horsepower ratings from 7.5hp to 20hp (5.5kw ~ 15kw).
Normally, below 11kw agitator, single impeller usually be matched. Above 11kw, double
impeller better. Details design should be based on the users request and jobsite condition.
The impeller is fixed to the shaft with bolts to avoid rotating or sway (connection with key
groove optional). Its vertical location on the shaft is determined as a height from the tank
bottom corresponding to the impeller diameter times 0.75. For example, a 20 impeller
should be mounted 15 above the bottom. GN recommends straight impeller blades for
tanks under 5 deep and canted blades for deeper tanks. If dual impellers are desired,
straight blades are mounted on the bottom and the canted blade impeller is installed at a
point about two-thirds above the tank bottom.
The keyed motor and driven impeller shafts are rigidly connected by a multi-piece
coupling, which uses tapered locking bushings to secure the shafts together. Shaft lengthsare customized to suit customer specifications. For shafts longer than 8, a stabilizer is
mounted on the tank bottom to support the lower end of the shaft.
Section 2- Structure And Operation Principle
GN mud agitator is made of explosion-proof motor, worm gear reducer. impeller,
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mounting plate, elastic coupling, and rigid coupling. Explosion-proof motor and worm gear
reducer installed on mounting plate. Elastic coupling connect explosion-proof motor input
shaft and gearbox input shaft. Impeller shaft and gearbox output shaft are connected by
rigid coupling.
Although the arrangement mud agitator components is identical across the various sizes
and configurations, the drive motor, impeller, shaft length and diameter, gear drive, and
motor orientation vary between models. Figure 2 shows the typical components of a mud
agitator. The configuration for the same power rating is identical, except for the type of ear
drive. The unit is shipped unassembled and requires assembly by a trained, qualified
technician.
Fig. 2: Main components of GN mud agitator
S/C Part No. Description Qty
7 M20X80botls assembly 4
6
Motor & worm gear reducer
component 1
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5 M14X140 Impeller installation bolt 2
4 Stabilizer 1
3 ImpellerSingle or double
Layers1-2
2 M14X70 Shaft installation bolt 61 Agitator shaft 1
2.1 Drive Motor
The mud agitator is operated by a 3-phase induction motor. Drive motors range from 7.5 to
20 horsepower with customized hz and voltage; the power requirements are specified on
the customer order. Electric power, switching, and safety devices are provided by the
customer.
GN can offer starter for agitator as request. All components come from Siemens of
Schneider.
2.2 Gear Drive
Rotation of the drive motor is transferred to the impeller shaft through the directly coupled
gear drive. The drive is a reduction gearbox and is factory assembled to the drive motor.
The drive is sized to apply the maximum torque required to produce the design impeller
rotation speed of 60 rpm under 50hz, and 72 rpm under 60hz.
2.3 Impeller
Impellers are available in diameters ranging from 650mm to 1100mm to meet the needs of
various size mud tanks. The impeller diameter is generally determined by the size of the
tank. Larger or deeper tanks employ dual impeller units having a secondary impeller
mounted closer to the mud surface. The impeller is mounted on the shaft using a tapered
locking bushing. A bolt / key inserted in the impeller shaft locks the impeller to the shaft
and prevents rotation. Canted impeller blades are desirable near the bottom of tanks more
than 1500mm (5) deep or where other forces of flow factor may be absent in the tank.
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Fig.3: Canted Impeller
2.4 Main parts list for different agitator models
S/C Model Main parts Part No. Specs Qty
1GNJBQ03
0A
Motor & Gearbox Assembly GNJBQ030-01 Subassembly 1
Shaft GNJBQ055-02 Welding Assembly 1
Stablilizer GNJBQ055-03 SUS316 1
Impeller GNHJYL65-00 ZG35# 1
2GNJBQ05
5A
Motor & Gearbox Assembly GNJBQ055-01 Subassembly 1
Shaft GNJBQ055-02 Welding Assembly 1
Stablilizer GNJBQ055-03 SUS316 1
Impeller GNHJYL85-00 ZG35# 1
3GNJBQ07
5A
Motor & Gearbox Assembly GNJBQ075-01 Subassembly 1
Shaft GNJBQ055-02 Welding Assembly 1
Stablilizer GNJBQ055-03 SUS316 1
Impeller GNZZYL95-00 ZG35# 1
4
GNJBQ07
5A-D
Motor & Gearbox Assembly GNJBQ075-01 Subassembly 1
Shaft GNJBQ075D-02 Welding Assembly 1
Stablilizer GNJBQ055-03 SUS316 1
Impeller GNZZYL80-00 ZG35# 1
5GNJBQ11
0A
Motor & Gearbox Assembly GNJBQ110-01 Subassembly 1
Shaft GNJBQ055-02 Welding Assembly 1
Stablilizer GNJBQ055-03 SUS316 1
Impeller GNHJYL105-00 ZG35# 1
6GNJBQ11
0A-D
Motor & Gearbox Assembly GNJBQ110-01 Subassembly 1
Shaft GNJBQ075D-02 Welding Assembly 1
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Stablilizer GNJBQ055-03 SUS316 1
Impeller GNZZYL85-00 ZG35# 1
7GNJBQ15
0A
Motor & Gearbox Assembly GNJBQ150-01 Subassembly 1
Shaft GNJBQ150-02 Welding Assembly 1
Stablilizer GNJBQ055-03 SUS316 1
Impeller GNHJYL110-00 ZG35# 1
8GNJBQ15
0A-D
Motor & Gearbox Assembly GNJBQ150-01 Subassembly 1
Shaft GNJBQ150D-02 Welding Assembly 1
Stablilizer GNJBQ055-03 SUS316 1
Impeller GNZZYL95-00 ZG35# 1
9GNJBQ18
5A-D
Motor & Gearbox Assembly GNJBQ185-01 Subassembly 1Shaft GNJBQ150D-02 Welding Assembly 1
Stablilizer GNJBQ055-03 SUS316 1
Impeller GNHJYL105-00 ZG35# 1
10GNJBQ22
0A-D
Motor & Gearbox Assembly GNJBQ185-01 Subassembly 1
Shaft GNJBQ150D-02 Welding Assembly 1
Stablilizer GNJBQ055-03 SUS316 1
Impeller GNHJYL110-00 ZG35# 1
11Interchang
eable parts
Shaft linking boltsGB/T 5783
M1470SUS316 6
Impeller fasten bolts GB/T 41 M14 SUS316 2
Impeller fasten spring washer GB/T 93 14 SUS316 8
Impeller fasten boltsGB/T 5783
M14140SUS316 8
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Section 3- Model selection and Installation
Before installation / disassembly, read and understand all safety information presented in
this manual and associated documents. Review the equipment handling procedures in the
manual. Pay particular attention to information concerning lift points and the use of
spreader bars before lifting or moving the equipment.
Failure to observe proper equipment handling procedures may result in serious personal
injury and/or damage to the equipment.
3.1 Model selection
For proper mixing and suspension of solids, the mud agitator must be properly sized and
installed. To properly size a mud agitator, proceed as follows:
1). Select desired style horizontal type
2). Determine available electric power - 440V/460V/380, 60HZ , 380V/400V/415V, 50HZ
or customized.
3). Select horsepower and impeller(s) as determined by the following factors:
a. Tank design - round or square
b. Tank dimensions
c. Maximum mud weight
d. Desired turnover ratio (TOR)
After gathering the required information, the agitator can be properly sized to meet the
horsepower demand and correct agitation for the application. To ensure accurate sizing,
GN recommends clients to communicate with GN people to make sure size and model.
3.2 Operation Attentions
Following are operational recommendations for mud agitators:
1. Maintain uniform tank dimensions, i.e. equal width-to-length ratio or as close as
possible to equal.
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2. Avoid TOR values greater than 85 seconds, as this may jeopardize solids suspension.
3. Avoid TOR values less than 40 seconds, as this may result in formation of a vortex and
increase air entrapment.
3.3 Installation
Following are the sequential steps of the mud agitator installation procedure. The sequence
presented is a guideline and may vary depending on the users facilities, previous
experience with this equipment, and optional equipment.
1. Read and understand all safety information & handling procedures in this manual, and
identify the mud agitator components.
2. Locate and weld mounting plate and stabilizer (if required) to tank structure.
3. Place shaft in tank, and assemble impeller(s), tapered bushings, and male coupling on
shaft.
4. Install female coupling on gearbox shaft.
5. Install motor and gearbox assembly, and attach shaft coupling to gearbox coupling.
6. Connect electric power supply to drive motor.
Leveling
To prevent undue premature wear on the gearbox or coupling and ensure long-term
reliability and efficiency of the mud agitator, the impeller shaft should rotate in a true
vertical orientation, with concentricity
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Fig. 4: Agitator mounting dimension
Agitator mounting dimension as showed as following.
Motor Power
No.
3kw 5.5kw 7.5kw 11kw 15kw 18.5kw 22kw
A 909 1072 1157 1296.5 1474 1509 1529
B 527 588 607 692 747 753 753
C 789 935 1005 1125 1330 1330 1529
D 525 610 682 755 890 890 890
E 723 859 929 1049 1244 1244 1244
F 313 358 458 528 678 678 678
G 24 24 24 24 24 24 24
H 33 38 38 38 42 43 43
M
L
Section A-A
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Gearbox mounting plate
The mounting location must be determined before the gearbox is installed. When selecting
the mounting plate location, ensure that sufficient clearance is provided between theimpeller blades and the tank wall. Use a level to ensure absolute, horizontal orientation of
the mounting plate in two perpendicular directions. Select shims as needed to achieve level
mounting, mark the position of shims, and then remove the plate from the tank as it must
be placed onto the gearbox shaft before installing the female coupling.
If impeller shaft is more than 8 long, a stabilizer is required to support the lower end of
the shaft.
Install the stabilizer as follows:
1. Drop a plumb line through the center of the mounting plate to locate the exact center
position of the stabilizer on the tank floor.
2. After determining its proper location, weld the stabilizer to tank floor.
Shaft assembly
Following installation of the stabilizer (if needed), place the shaft in the tank and assemble
as follows:
Hoist the shaft vertically, and carefully lower into the tank while maintaining suitable
support to permit assembly of impeller(s) and male coupling. While assemble shaft and
impeller, rigid coupling should assembled with spring waster and flat washer, and then
tighten, otherwise, it may cause runout of impeller shaft, and speed up the abrasion of
gearbox and bearing.
Impeller assembly
Install impeller with shaft, fixed with M14x140 bolt (2 bolts for each set of impeller)
The impeller mounting location is kept by GN before delivery.
For a canted single impeller or a dual impeller shaft, GN sets the distance of the lower
impeller from the tank floor at 75 percent of the impeller diameter. Mount the optional
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second impeller at a distance above the tank floor that is equal to 2/3 of the tanks
maximum mud height. For example, if the tank mud depth is 10, the second (upper)
impeller key should be centered approximately 6.5 above the bottom of the tank. For tank
depths of 6 or less, install a single straight impeller not more than 12 above the tank
floor.
Motor and gearbox assembly and installation
GN Solids control Co., Ltd. will install motor and gearbox before delivery. Clients can
installation or disassembly as request. For details, please refer motor/gearbox user
manual.
Gearbox and impeller coupling connection
1. Position and align shafts so that couplings are brought together, and fully mate couplings
on shaft and gearbox
2. Check for a gap at any location around the coupling flanges. A gap indicates angular
misalignment. Difficulty in mating the shafts indicates parallel misalignment. Alignmentshould be checked with a dial indicator before bolting flanges together.
3. After aligning couplings, insert and tighten hex head screws (supplied with male
coupling) to the recommended torque. Tighten in stages, using an alternating pattern until
final torque is reached. Re-check torque after completing tightening sequence.
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Fig. 5: Coupling assembly
3.4 Gearbox lubricant level
Verify that lubricant level in the gearbox reaches the bottom of the oil level plug. Refer to
below Figure for location of oil level plug.
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Fig. 6: Gearbox Plug Locations
3.5 Electrical connections
WARNING! TO AVOID SERIOUS PERSONAL INJURY BE SURE
EQUIPMENT IS LOCKED OUT, TAGGED OUT, AND
DE-ENERGIZED PRIOR TO PERFORMING MAINTENANCE
AND/OR ADJUSTMENTS.
WARNING! MOTOR MUST BE OPERATED AT THE DESIGNATED
SUPPLY VOLTAGE.
WARNING! HIGH VOLTAGE MAY BE PRESENT. BE SURE FUSED
DISCONNECT SUPPLYING ELECTRICAL POWER TO THIS
EQUIPMENT IS OPEN. LOCK-OUT AND TAG-OUT POWER
SUPPLY TO PREVENT ACCIDENTAL APPLICATION OF POWER
WHILE MAINTENANCE AND/OR ADJUSTMENTS ARE IN
PROGRESS.
WARNING! ELECTRICAL CONNECTIONS MUST BE MADE IN
ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE (NEC)
AND ALL APPLICABLE LOCAL CODES. FAILURE TO COMPLY
MAY RESULT IN AN UNSAFE CONDITION THAT COULD INJURE
PERSONNEL OR DAMAGE EQUIPMENT.
ENSURE THAT ALL ELECTRICAL AND CONDUIT
CONNECTIONS ARE SECURE.
Before making power connections, be sure that electrical source meets one of the following
standards:
1. AC power at rated frequency is within 10 percent of rated voltage, or
2. AC power at rated voltage is within 5 percent of rated frequency, or
Levelplug
Ventplug
Drainplug
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3. Combined variation in voltage and frequency is 10 percent of rated values, provided
the frequency variation does not exceed 5 percent of rated frequency.
Refer to drive manufacturers literature in Section 10 for additional assistance in making
electrical connections.
3.6 Storage & handling
If the machine will not be installed immediately, it should be covered with a tarpaulin
(tarp). If unit is stored outdoors, use a UV- resistant tarp, or UV-resistant shrink-wrap.
Install vents when using shrink-wrap. Seal operating and maintenance manual in plastic,
and attach to unit.
GN mud agitators are shipped disassembled except for motor and gearbox, which are
supplied as an assembly. All components including shaft are packaged in a sea/air worthy
wooden case.
The delivered equipment should be transported on the ground using a forklift, lifting lugs
as showed as fig.8.
Fig. 7 Mud agitator lifting lugs
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Section 4- Machine start up & shutdown
This section contains initial and normal startup and shutdown procedures for the mud
agitator. These procedures are designed to ensure safe operation and shutdown of the
equipment.
4.1 Initial startup
The Initial Startup procedure is to be used when the equipment is being started for the first
time, or when equipment is returned to use after an extended period out of service. The
initial startup is performed as follows:
1) Verify that all operators and maintenance personnel have read and understand all
operating and safety information.
2) Verify that equipment has been assembled and installed in accordance with part .
3) Check oil level in gearbox (see part ). If low, fill to bottom of level plug.
4) Jog drive motor to check that impeller rotates in the correct direction. If rotation is
incorrect, shut down and lock out and tag out electric power, and reverse any two leads to
switch direction of motor rotation.
5) Start up mud agitator in accordance with the Normal Startup procedure.
4.2 Normal startup and operation
After the initial startup, the mud agitator is started up and operated as follows:
1) Verify that all personnel, tools, documents, and other material are clear of equipment.
2) Turn on the mud agitator, and then open the associated mud feed and outlet systems.
3) Observe the operation of the impeller shaft assembly as the tank fills with mud and
verify continuous rotation of impeller(s).
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Section 5- Maintenance
Routine maintenance is critical to ensure maximum life and trouble-free operation of the
mud agitator. While the recommended maintenance schedule in this section is flexible,
modifications should be based on experience with operating the equipment at your
facilities. A maintenance log should be kept to help establish a routine maintenance
schedule, as well as to monitor and adjust the schedule as necessary throughout the
equipments life. When determining a suitable maintenance schedule, consider duty cycle,
ambient temperature, and operating environment.
WARNING! TO AVOID SERIOUS PERSONAL INJURY, LOCK OUT,
TAG OUT, AND DE-ENERGIZE MACHINE PRIOR TO
PERFORMING MAINTENANCE.
5.1 Routine maintenance
Routine maintenance consists of checking gearbox oil level and oil condition and greasing
gearbox bearings at required intervals.
5.2 Gearbox lubrication
Before operation, lubrate gearbox with L-CKE/P 220~320# worn gear oil (while ambient
temperature around -30~40; or with L-CKE/P 320~460# worn gear oil (while ambient
temperature around 25~65. Verify that lubricant level in the gearbox reaches the bottom
of the oil level plug. Refer to the following tables for oil quantities and approved
lubricants.
Bearings should be cleaned and re-greased on the same schedule as oil changing. After
cleaning, fill bearings to one-third of their free volume.
After 1000 hours of initial startup, clean gearbox inside, add new grease oil. Then
lubricated at every 2500-hour interval.
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Agitator modelGNJBQ
055A
GNJBQ
075A
GNJBQ
110A
GNJBQ
150A
Motor power5.5kw 7.5kw 11kw 15kw
Impeller speed 60/72RPM (50Hz/60Hz)
Worn
gear
grease
oil
Brand
&
model
Ambient temp.
-30 ~ 40
N460 worm gear oil Accordance with
Standard:
SH0094-1991
Ambient temp.
25 ~ 65
N220 worm gear oil
Gearbox oil QtyL 8.6 16.7 16.7 27.2
Lubricated with suitable grease oil as request. Refer following table with some
interchangeable grease oil brand for users to choose at different ambient temperature.
Ambient
temperature
Gearbox lubricating oil manufacturer & model
Sinopec Shell Mobil
-30 ~ 40
L-CKE/P220 Shell Tivela S320 Gear 630XPL-CKE/P320 Shell Tivela S320 Gear 632XP
25 ~ 65 L-CKE/P320 Shell Tivela S320 Gear 632XP
L-CKE/P460 Shell Tivela S460 Gear 634XP
While gearbox or motor temperature over 90C, or vibrate/sound abnormally, shut up
equipment and check immediately.
Fasten all linking bolts periodically.
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Section 6- Troubleshooting & Solution
If mud disturbance in the tank becomes unsatisfactory, check the possibilities listed below
and correct as described.
PROBLEM POSSIBLE CAUSE REMEDY
Over-temperature Motor and gearbox not installed
suitably
Adjust to suitable position,
enable motor and gearbox
axes concentric
Abnormal abrasion of oil seal Trickle lubricating oil at oil
seal ledge
Lubricating oil too much or less Adjust oil quantity baseds on
oil level plug
Lubricating oil not pure, or not
workable well
Replacing with new oil
Too much
vibration and
noise
Motor and gear box not fixed well Check and find out the loosing
point, fasten correctly
worm gear supplementary tooth badly
worn/ damaged
Replacing worm gear
supplementary tooth (connect
GN)
bearing badly worn or disabled Replacing bearing
Linking bolts for coupling and agitator
output plate pull off, or foundation
bolts pull off
Fasten or replacing bolts
Impeller shaft bended or deformed Align the shaft
Impeller local distortion or broken off Repair or replace impeller
Working current
fluctuated greatly
worm / gear in gearbox badly worn Inspection gearbox gradually,
repair or replace relative parts
Far-forth top circle of shaft rubbed with
stabilizer inner wall
Align shaft or re-install
stabilizer
Coupling damaged Replace coupling completely,
or replace elastic sleevepackage
Noise Bearing badly worn or with too bigger
gap
Replace bearing
Worm gear supplementary tooth not
joggled well
Repair booth surface or
replace worm gear
supplementary tooth
Lubricating oil insufficient Add oil accordance with oil
gauge figure
extraneous materials in gearbox Clean out lubricating oil to
empty extraneous materials,
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and add new oil
Oil leakage Oil sealing ledge badly worn Replace oil sealing
Too much lubricating oil Adjust oil quantity accordance
with oil gauge figure
Oil level plug screw not tighten well Tighten or add more sealingadhesive tape
Oil leveler damaged Replace oil a new leveler
Worm gear
supplementary
tooth worn
shortly
Lubricating oil cannot meet standard Replace suitable lubricating
oil
Lubricating oil insufficient Refill lubricating oil
accordance with oil leveler
showed
Lubricating oil is not changed timely,
and become degraded
Replacing lubricating oil
timely as requestover-temperature while operation Treated as over temperature or
reduce ambient temperature
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Section 7- Terms of warranty
All GN equipment sold pursuant to this agreement, guarantee 14 Months after shipment or
12 months after commissioning, whichever comes first. During the guarantee period, GN
will be responsible for problems caused by quality of production or raw material except the
wearing spare parts of the equipment and problems caused by incorrect man-made
operation, providing GN operating, maintenance and inspection recommendations are
followed, and authorized oil filters and lubricants are utilized and replaced at the
recommended intervals.
In the event of improper installation, abuse, misuse, improper operation or improper or
lack of maintenance of GN equipment in accordance with GN recommendation and
accepted industry practice, this Warranty will become null and void with respect to such
GN equipment. During the period of warranty and upon written notification to GN by the
Purchaser, GN guarantees replacement of all parts manufactured by GN shown to be
defective in material and manufacture. GN makes no further warranty, either expressed or
implied, for any amount in excess of the cost of repair or replacement of any part shown tobe defective. The foregoing warranty shall be null and void and of no further force or
effect with respect to any GN equipment on which any repairs or maintenance, other than
normal wear part replacements, are performed by any service provider other than GN or
GN authorized providers.
This Warranty does not cover and GN makes no warranty covering:
a. Failures occurring after expiration of the warranty period.
b. Failure caused by decomposition by chemical action or wear caused by abrasion.
c. Equipment damaged in shipment or by accident.
d. Defects in articles purchased by GN or its affiliates from non-affiliated parties and
resold without alteration, which are covered by warranty from the original manufacturer.
e. Failures due to abuse, misuse, or lack of proper recommended maintenance.
f. Failures of equipment, which has in any way been repaired or altered except as
authorized by GN or equipment using components manufactured or repaired by any other
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party than GN unless expressly authorized by GN.
The foregoing warranty shall be herein referred to as the Agitator Warranty. The
Mud Agitator Warranty is for the exclusive benefit of Purchaser.
THE AGITATOR WARRANTY CONSTITUTES GNS SOLE AND
EXCLUSIVE WARRANTY WITH RESPECT TO ANY AGITATOR PURCHASED
HEREUNDER, EXCEPT FOR THE AGITATOR WARRANTY, GN HEREBY
DISCLAIMS ALL EXPRESS WARRANTIES (WHETHER ORAL, WRITTEN OR
ARISING BY PROMISE, DESCRIPTION OR SAMPLE) AND ALL IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, WARRANTIES OF
NON-INFRINGEMENT, ANY WARRANTY OF MERCHANTABILITY AND
FITNESS FOR ANY PARTICULAR PURPOSE, AND ALL WARRANTIES
ARISING BY CUSTOM OR TRADE USAGE.
Purchaser represents that it has evaluated the GN Agitators in light of the Agitator
Warranty and has determined that the GN Agitator are fit and sufficient for Purchasers
operations (including the Processing applications). Purchaser acknowledges that it is solely
responsible for evaluating and choosing the sites where the GN Agitator will be installedand the manner in which GN Agitators will be used.
GN does not warrant that the Environmental Protection Agency (EPA) or any other
regulatory authority has approved or certified the GN Agitators for any purpose.
Purchaser assumes any risk, burden and/or costs of EPA or their regulatory compliance
with respect to any GN Agitator acquired pursuant to this Agreement.
GN has made no inspection of the sites where Purchaser intends to install the Centrifuges
and disclaims any warranties with respect to installation of the GN Agitators. Purchaser
shall use its best efforts to ensure that all persons or entities renting or leasing GN
Agitators are informed of the foregoing exclusive warranty and warranty disclaimer.
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Section 8- Installation and maintenance log
1. Purpose
This section should be used by operating and maintenance personnel to record historical
information gathered during the installation and operation of GN equipment. If properly
kept, the log will be useful for altering maintenance intervals and intercepting trends that
may indicate the need for changing operating procedures. Each entry in the log should be
dated for future reference and tracking. If required, additional pages may be added to the
log by copying a blank page or simply inserting ruled paper at the rear of the section.
2. Installation and Maintenance Record:
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