Printed in U.S.A. July 27, 1992

Manufacturers of Precision Instruments

INSTALLATION AND MAINTENANCEWITH ILLUSTRATED PARTS LIST

TENSION SENSATER LOAD CELLP/N E80

Part Number TW561

Manual TW561 contains 8 pages as follows:

Cover and Front Material ............. February 1981 Pages 3 through 6 .................. February 1981

All product, brand, or trade names used in this publication are the trademarks or registered trade- marks of their respective owners.

Information in this manual is subject to change without notice.

IMPORTANT SAFETY NOTICE

Proper service and repair is important to the safe, reliable operation of all M/D TOTCO equipment. The service procedures recommended by M/D TOTCO and described in the technical manuals are recommended methods of performing service operations. When these service operations require the use of tools specially designed for the purpose, those special tools should be used as recom- mended. Warnings against the use of specific service methods that can damage equipment or render it unsafe are stated in the manuals. These warnings are not exclusive, as M/D TOTCO could not possibly know, evaluate and advise service people of all conceivable ways in which ser- vice might be done or of all possible associated hazardous consequences. Accordingly, anyone who uses service procedures or tools which are not recommended by M/D TOTCO must first sat- isfy themselves thoroughly that neither personnel safety nor equipment safety will be jeopardized by the method selected.

February 1981 M/D TOTCO

. . . III

LIMITED PRODUCT WARRANTY

THE FOLLOWING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT BY WAY OF LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.

Martin-Decker TOTCO (“Company”) warrants to Buyer (“Purchaser”) of new products manufactured or supplied by the Company that such products are, at the time of delivery to the Purchaser, free of material and workmanship defects, subject to the following exceptions:

A. Any product which has been repaired or altered in such a way, in the Company’s judgement, as to affect the product adversely, including any repairs, rebuilding, welding or heat treating outside of Company authorized facility.

B. Any product which has, in the Company’s judgement, been subject to negligence, accident, or improper storage.

C. Any product which has not been installed, operated and maintained in accordance with normal practice and within the recommendations of the Company.

D. For all items of special order by Buyer which are not manufactured by Company, Buyer should submit warranty claims directly to the manufacturer thereof.

The Company’s obligation under this warranty is limited to repairing, or at its option, replacing any products which in its judgement proved not to be as warranted within the applicable warranty period. All costs of transportation of products claimed not to be as warranted to authorized Company service facility shall be borne by Buyer. Costs of return transportation to Buyer of products accepted for repair or replacement by Company under the warranty provisions of the Sales Agreement shall be borne by the Company. Company may, at its sole option elect to refund the purchase price of the products, and Company shall have no further obligation under the Sales Agreement.

The cost of labor for installing a repaired or replacement part shall be borne by Buyer. Replacement parts provided under the terms of this warranty are warranted for the remainder of the warranty period of the product upon which installed to the same extent as if such parts were original components thereof.

The warranty periods for various products are:

A. Hydraulic, Mechanical, Electronic Equipment: one (1) year from date of installation or fifteen (15) months from date of shipment from Company, whichever occurs first.

B. All Elastomer Diaphragms: six (6) months from date of shipment from Company.

No deviations from the Company’s standard warranty terms or period as stated herein will be honored unless agreed to in writing by an authorized Company representative prior to acceptance of the order.

EXCLUSIVITY OF REMEDY AND LIMITATION OF LIABILITY. THE REMEDIES PROVIDED FOR IN THIS WARRANTY SHALL CONSTITUTE THE SOLE RECOURSE OF BUYER AGAINST COMPANY FOR BREACH OF ANY OF COMPANY’S OBLIGATIONS UNDER THE SALES AGREEMENT WITH BUYER, WHETHER THE CLAIM IS MADE IN TORT OR IN CONTRACT, INCLUDING CLAIMS BASED ON WARRANTY, NEGLIGENCE, OR OTHERWISE.

IN NO EVENT SHALL COMPANY BE LIABLE FOR DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, STRICT LIABILITY OR IN TORT (INCLUDING NEGLIGENCE), NOR FOR LOST PROFITS.

iv February 1981 M/D TOTCO

E80 TENSION SENSATER LOAD CELL pz-j

1.00 INTRODUCTION

1.01 This manual contains procedures for the removal, disassembly, repair, reinstalla-

tion and periodic maintenance of the MARTIN- DECKER E80 Tension Sensater Load Cell.

1.02 Make sure that all personnel who will be performing any of the procedures out-

lined have read the “WARNING”notice and “IMPORTANT SAFETY NOTICE” on page 2.

2.00 DESCRIPTION

2.01 The MARTIN-DECKER E80 Tension Sensater Load Cell is a tension type load

cell with a diaphragm type sensing element.

2.02 The E80 is used with the following MARTIN-DECKER Weight Indicator sys -

terns to transmit direct, no-lag signals to indicator gage.

WEIGHT ANCHOR TECHNICAL INDICATOR HERCULES NATIONAL MANUAL

D 129T D TW570 E 121T, 131T E, EB TW583

EB 121T, 131T EB TW583

2.03 The E80 is mounted in the anchor with the self-sealing coupling up and toward

the drum.

3.00 PERIODIC MAINTENANCE

3.01 Because of their design characteristics the MARTIN-DECKER E80 Sensaters are

virtually trouble free. The following procedures are provided, however, to facilitate any necessary maintenance and repair.

3.02 With the blocks empty, check for a cell gap of approximately .62” (16mm) see

(Figure 3-l). If the cell gap is less than . 50” (13mm) inspect the Sensater, disconnect, hose and hydraulic Weight Indicator for fluid leaks. After ensuring the integrity of the hydraulic system, readjust the cell gap as follows:

a. Remove the cap from the check valve (Figure 3-l).

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3.02 cont.

b.

C.

d.

e.

f.

g.

Screw the hand pump on the check valve body, do not tighten swivel nut.

Fill the hand pump reservoir with hydraulic fluid.

Slowly pump the handle a few strokes to expel air.

Tighten the hand pump swivel nut and pump fluid into the system until the cell gap is approximately . 62” (16mm).

Be sure at all times, that pump bowl is at least half full with fluid.

Remove the hand pump and replace the check valve cap.

3.03 Check the amount of Sensater stroke between light and heavy loads (as when

going in or coming out of the hole). If the system is relatively air free, the Sensater should stroke no more than .08” (2mm) be- tween an empty block load and a load of approxi- mately half the gage capacity. If the Sensater strokes excessively, bleed the air from the system at the plug on the Weight Indicator. If the Indicator is panel mounted, bleed the air from one of the damper block connections. After the air has been bled from the system, recheck the cell gap per the procedure outlined in paragraph 3.02.

3.04 SENSATER REMOVAL FROM ANCHOR

3.05 Occasionally, the Sensater may need to be cleaned or repaired. When maintenance

is required, ensure that the blocks are empty and the Sensater fully loaded. (See Figure 3-2).

a. Uncouple the disconnect.

b. Securely block the anchor on the bottom stop.

c. To REMOVE THE LOAD from the Sensater, open the poppet in the Sensater disconnect half and drain the fluid until the load is relieved from the Sensater and transferred to the anchor stop.

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Lz-ll E80 TENSION SENSATER LOAD CELL I

3.05 cont. d. Remove the cotter pins, Sensater pins

and Sensater from the anchor.

NOTE

If pins cannot be easily removed from anchor use penetrants or other liquids to free them. If pins are badly cor- roded heat may be required. Do not damage anchor or Sensater when re- moving pins.

e. Clean off any dirt, ice or other ob- structions that may have built up on the Sensater. A high pressure water hose may be used for this purpose.

f. Clean off any rust or corrosion that may have formed on the Sensater pins or the anchor ears.

Figure 3-l. Sensater

PARTS LIST - Table 3-l

[TEM QTY NO. PART NO. DESCRIPTION REQ’D

1 E78-1 Housing, Upper 1 2 J816-6KA Screw, 5/16-18 X 3/4 16 3 E78-2 Housing, Lower 1 4 5683 Bolt 16 5 E77 Plate, Load 1 6 M340 Spacer 16 7 E74A Ring, Retainer 1 8 E75A casing 1 9 E57 -30 Diaphragm 1

10 5928 Elbow, 1/4M X 1/8F 1 11 J10032A-13 Hose, 13” with Coupling 12 P311A Junction Block : 13 J816-6PS Screw, 5/16-18 X 314 2 14 F350-1 Check Valve, with Cap 1 15 JlOgOOA-20 Disconnect, Male Half with Dust Cap 1

Page 4 l/82

I E80 TENSION SENSATER LOAD CELL 11 TW561 ]

!ZiENSAT-EA PINS

Figure 3-2. Anchor Mounting

3.06 Sensater disassembly, repair and re- assembly (refer to Figure 3-l).

3.07 DISASSEMBLY AND REPAIR

a. Clamp the bottom half of the Sensater pin pad eye in a vise.

b. Remove the two junction block screws (Item 13).

c. Pull up the junction block (Item 12) and screw it off the hose (Item 11) by holding the hose coupling with an appropriate wrench and then turning the junction block counter-clockwise.

d. Remove the bolts (Item 4) from the upper housing (Item 1) and lift off the upper housing.

e. Remove the bolts (Item 4) from the lower housing (Item 3) and remove the lower housing.

f. Lift out the diaphragm sub-assembly, (Items 2, 7, 8 and 9) and the load plate (Item 5).

g. Unscrew the hose (Item 11) from the elbow (Item 10).

h. Remove the screws (Item 2) from the diaphragm sub-assembly (Items 2, 7, 8 and 9) and separate the casing (Item 8), diaphragm (Item 9) and the retainer ring (Item 7).

I ITEM NO. PART NO.

JlOgOOA-20 J10900A-02

WY. DESCRIPTION REQ’D

Disconnect, Anchor Half 1 Disconnect. Hose Half 1

1 I 2 , ~~~ ~-~-~~ 3 100796-lllPO* O-Ring 1 1

*J900 and J901 Series Disconnects use O-Ring 100796-113A0

i. Clamp the junction block (Item 12) in a vise and remove the check valve (Item 14) and the disconnect half (Item 15).

j. Where possible, clean all metal parts with steel wool or a wire brush. Check the hose (Item 11) for breaks or cuts and ensure that the inside is clear.

3.08 REASSEMBLY

I WARNING

Do not use solvents or distillates when cleaning the diaphragm (Item 9), retainer ring (Item 7) and diaphragm sub-assembly casing (Item 8). Do not sand blast the retainer ring or sub-assembly casing. The use of solvents or sand blasting may result in the diaphragm unseating under pres- sure. Wash these parts in deter- gent, rinse with clean water and dry with air or a cloth.

a. Clamp the junction block (Item 12) in a vise and apply thread sealer to the check valve (Item 14) and disconnect half (Item 15) pipe threads. Thread both pieces into the junction block and tighten.

b. Place the diaphragm (Item 9) into the groove in the diaphragm sub-assembly casing (Item 8). Slip the retainer ring (Item 7) over the diaphragm and align the holes in the retainer ring with the holes in the casing. Apply locktite sealant to the cap screw threads and start all 16 screws (Item 2). Tighten the cap screws a few turns at a time (alternating between opposing pairs of screws). Make at least four or five complete rounds of tightening before final snugging. When properly assem- bled, the casing and the retainer ring will form a flush seal around the circumference.

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I TN561 II E80 TENSION SENSATER LOAD CELL -7

3.08 cont. c.

d.

e.

f.

f3

h.

1.

j.

k.

1.

Page 6

Apply thread sealer to the threads on both ends of the hose (Item 11) and tighten into the elbow (Item 10).

Clamp the lower housing (Item 3) in a vise and place the load plate (Item 5) on the housing. Center the scallops of the load plate on the housing bolt holes.

Place the diaphragm sub-assembly (Items 2, 7, 8 and 9) over the load plate (Item 5) so the threaded holes in the casing are aligned with the bolt holes in the lower housing (Item 3) and the elbow (Item 10) is in the relative - position shown.

Place the spacers (Item 6) in position over the bolt holes in the lower housing (Item 3). Loosely thread the lower housing bolts (Item 4) into place.

Place the spacers (Item 6) in position over the bolt holes in the load plate (Item 5).

Loop the hose (Item 11) as shown by the dashed line in the top view and pull the end through the hole in the upper hous- ing (Item 1).

Loosely thread the junction block (Item 12) on the hose end (Item 11).

Place the upper housing (Item 1) in position so that the bolt holes are cen- tered over the spacers (Item 6). Thread the upper housing bolts (Item 4) into place. Tighten all of the upper housing and lower housing bolts.

Tighten the hose (Item 11) into the junc- tion block (Item 12) by holding the hose coupling with an appropriate wrench and rotating the junction block clockwise. Ensure that, when tightened, the junc- tion block will be in the relative position shown.

Apply Locktite sealant to the junction block screws (Item 13). Insert and tighten the screws.

m. After reassembly is complete, place the Sensater, Sensater pins and cotter pins back in the anchor.

n. Refill the system with hydraulic fluid per the procedure outlined in section 3.09.

3.09 SENSATER REINSTALLATION IN ANCHOR

a.

b.

C.

d.

e.

f.

63

h.

1.

After cleaning and/or repair procedures are completed, apply grease to the Sensater eyes, Sensater pins and anchor ears. Place the Sensater, Sensater pins and cotter pins back in the anchor.

Remove the cap from the check valve (Figure 3-1, Item 14).

Screw the hand pump on one turn and fill the hand pump reservoir with hydraulic fluid.

Slowly pump the handle a few strokes to expel air.

Tighten the hand pump and pump fluid into the system. In order to keep excessive air from being pumped into the system, ensure that the fluid level in the hand pump reservoir does not drop below half capacity.

Bleed air from the Sensater by push- ing open the poppet in the Sensater disconnect half.

Repeat pumping and bleeding proce- dures until all of the air is bled from the Sensater. Continue to pump fluid into the system until cell is over loaded. Remove block from anchor stop and bleed until cell gap is approximately . 62” (16mm). Recouple the disconnect.

[CAUTION1 When recoupling the disconnect, ensure that the disconnect halves are properly aligned. Improper alignment may result in damage to the “0” Ring (Figure 3-2, Item 3) and subsequent fluid leak- age. Also, the recoupling connec- tion should be hand tightened only.

lo/80