Core Torque Winter 2011

8/6/2019 Core Torque Winter 2011

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Sunday we decided to explore the Hungry Ranges however we had to wait for

another 4WD group so we spent some time on the test track. I made a point of

avoiding the bottomless puddle which apparently had claimed two other vehicles

from different 4Wd groups over the weekend.

We followed the Ridge Track over the Hungry Ranges which had many of the ve-

hicles lifting wheels whilst coming down a particularly steep section. Then we

followed an easy track around the base of the mountain before heading up the

Billy Goat Track. This was the hardest track in the area and succeed in raising the

heart beat of many drivers in the group. Approximately halfway up on a very

steep part of the track, a rock step and loose gravel made for a challenging obsta-

cle.

Been there ...

Spalding

We had a beautiful day for our trip to Spalding, aprivate property somewhere beyond Clare, not

hat it was hard to find as we have been there

before as a club but it has been a while. With 6

vehicles in tow the trip was fun and without inci-

dent or recovery.

We eventually found challenge hill after a nice

ittle lunch under a huge tree which showed off

weeping hills and fine views we eventuallyweaved our way back to this hill. Whilst not all of

us went down challenge hill which was a little

cary in parts we didn't end up going up the hill

mainly due to vehicles lacking the necessary

mods to be able to do it and survive in one piece,

but they don't call it challenge hill for nothing I guess!!

We followed a dried out creek bed for a way but came to an abrupt halt as none of our

cars were able to transform into a subma-rine unlike knight Riders car at the flinders

from memory. Anyway we tracked back and

continued to enjoy the drive and what the

property had to offer and if you wanted

some serious challenges there was much

available to tantalise you and test your car if

you so wished.

Anyway a great day I felt and look forward

to our long weekend away in Langkoop

Ben

(Yank Tank)


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... DONE THAT

LOVEDAY

What else could one expect from Loveday, it hasit all!! and OH BOY did we have a blast.The

camping was a little different than we expected

due to the flooding, all the campsites were un-

der water so we just followed the track down to

the water as far as we could go and set up camp

there.

We were able to have some great campfires thanks to 'Sled-Dog' as he bought down atrailer load of wood for us all and he only stayed the day. (much to his disappointment).

Thanks again Mate.

We had some of our regular campers there as well as other members that gamely

camped with us for the first time and had a great time, from the feedback we received.

Had some great fellowship around the fire with some laughs a few drinks and even Pete

(a.k.a. Blue Thunder) bought out the guitar. It was great getting to know you guys and

gals better! The tracks were of course a lot of fun with all of us giving most of them ago, some succeeding and some not quite, and even Ivan bottoming his Rexton out, stuck

over a speed hump, (oops sorry Mate it was a rather high mound).

The roller coaster of different tracks available really meant that there was something for

everyone to have some fun with, and just when we thought that we would head out to

the sand hills we received the biggest down poor in history, well it seemed like we

were walloped with about 2 feet of rain within about 20 minutes and everything was

completely under water giving us a whole new challenge, which was trying to remember

where the holes were which no-one could see anymore (check out the Core Cam foot-

age) and of course making 'Knight Rider' feel like

a real king of his castle, creating a moat around

his camper.

All in all a fantastic trip and love going camping

with all of you.

Check out the pics and footage on the website.

Till the next one, see you on the tracks!!


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What's Coming Up

JULY: 23/7/11

Spear Creek

AUGUST: 13/8/11

Quiz Night

SEPTEMBER: 10/9/11

Training Day and Articu-

lation Ramp Flex Test

OCTOBER: 1/10 15/10/11

Alice Springs

NOVEMBER: 19/11/10

Gawler

DECEMBER: 10/12

Morgan & Christmas Break-up


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TECHREPORT

C.V. JOINTS

What are C.V. joints ?C.V. Stands for constant velocity, it is a type of universal joint that allows power to be transferred throughvarying angles. The most common type of C.V. joint is the Rzeppa type. It differs from the Hookes (or cardan)oint ,which we have come to refer to as a universal joint, in that it utilises ball bearings driven by an innergrooved member to in turn drive an outer grooved member (bell).

When a ordinary universal joint is rotated at a fixed speed ,the output speed varies through the 360 deg ofotation first speeding up then slowing down. This is due to the angle of the cross changing throughout theotation. The other major difference is the maximum angle through which it can operate, which is greater thanhat of a universal joint.

Another type of C.V. Joint is a double cardan joint, this is effectively two uni-joints back to back ,each jointcancels out speed variations from the other so giving a constant output speed (velocity). This also doubleshe max working angle of a single uni-joint .

What are they used for ?

C.V. joints are used whenever drive is through large angles or when smooth power transfer is needed. In4wds this is most common to transfer power to the front wheels & allow for turning at the same time.ts most common to find Rzeppa type C.V.s here with ordinary unis mainly only used on Dana differentials

fitted to many jeeps). Double cardan joints are not used probably due to the extra length. Many new 4WDsare also using Rzeppa style CVs on front & sometimes rear driveshafts whilst older fourbys usually useconventional unis on rear & double cardan on front shafts.


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What goes wrong?

C.V. joints are a lot weaker than cardan/hookes type unijoints. They usually fail when the outer bell breaks, this is

quite thin particularly toward the outer edge, so failure ismost common whilst applying power whilst turning tightly.They can also be prone to wear if not lubricated & keptclean. Many larger solid axle 4WDs will utilise a closedsteering knuckle (swivel hub) such as Nissan patrols &Toyota landcruisers . This is where the CV is inside asealed housing & is lubricated by molybedenum grease(grease designed to stick really well to metal) .The other

technique most commonly used by small & medium sized 4WDs, generally with independent front suspen-sion, is to cover the joint with a flexible convoluted rubber boot. This boot keeps the grease in & dirt out. Ofcourse this boot can be prone to damage either through old age or sticks, rocks ,etc.

What can be done ?

Firstly maintenance, inspect the boot if fitted regularly for splits or tears. If damaged ,clean re-grease joint& replace boot immediately. With closed type its common for inner axle seals to leak & dilute or washgrease away. Outer swivel hub dust seals also commonly fail allowing dirt & water in. Also avoiding apply-ing lots of power whilst turning tightly will greatly improve the CVs survival chances.

What are known common weak areas ?

First up , let me say that this is my opinion which I have gained through observation & research, its by nomeans exhaustive. Toyota 80 & 100 series have relatively weak Rzeppa style CVs inside a closed swivelhub. They are usually fine with stock tyres open diffs & stock power levels. Hilux IFS front CVs can also bea little weak particularly if suspension is lifted too much as is true for most IFS 4WDs.GQ/GU patrols rarelybreak unless poor maintenance or heavily modified. Grand Cherokees use a Rzeppa front driveshaft & thisis very weak , particularly if suspension has been lifted & joint is worn.

Can I upgrade ?For most model 4WDs stronger aftermarket CV,s are available. In some instances this might be due tothicker bells or it might be through the use of stronger materials. Sometimes it might be possible to replacea CV for a universal joint, or with driveshafts, a double cardan joint. Also, be wary using cheap aftermarketparts, as they may not use as strong a material as factory joints.

Do lockers break CVs ?

Differential locks can certainly contribute towards broken CV joints; however there are two trains of

thought. Firstly, that without a locker one wheel may spin wildly & if it suddenly gains traction it causes ashock load which multiplies the forces. Secondly, having a locked differential means that it is possible totransfer 100% of the available torque through just one CV, an open diff can only deliver 50% max. If youadd big tyres & lower diff ratios then the torque load also goes up.

TECHREPORT


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CLUB Photos


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CoolPics


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been there ... Alice Springs

Uluru was great, except for some of the other tourists, for whom their nationality willremain a secret. Handy hint: stay away from the camp kitchen in Yalara Caravan Park.Its a great place to cook and eat, but its also a great place to socialise and drink wellinto the wee hours of the morning. Anyway back to the story ... the rock is amazing

and well worth visiting, even if you choose not to climb it. The visitors centre is alsowell worth the visit.

What can I recommend to those who havent done the drive there? If you have kidstake plenty of things to entertain them (although Im not advocating DVDs). Makesure, as a driver, you have plenty of music to keep yourself engaged. Service your ve-hicle. Take Jerry cans if your range fully loaded is less than 500kms. Make suresomeone has a SatPhone or HF and knows how to use it. Take a comprehensive firstaid kit and again know how to use it. Finally, travel Light.

Anyways if you want to know more catch me a church.

If you have a family trip that you want to share just send the story with photos to the editor


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The CORE 4x4 clubs AGM is approaching and will be held on the Saturday 2ndof July at 6pm at Victory Church. This is a very important meeting as alwaysand is now time to think who you would like to be the next President, Vice-president, Treasurer and Secretary. The current committee is as follows

President: Ben CameronVice-president: Daryl McelroyTreasurer: David Bonneveld

Secretary: Warren WellingsAs per previous years you need to be a member of Victory Church to be able tostand for a committee position but all members of CORE 4x4 club are entitled tovote which we all encourage you to do so as it is your club and we need to see tocontinue to push forward and take more ground.

Stay tuned as you will receive an email outlining firm dates and times and Ihope to see every CORE member there as we did last year which was an awe-some response!

CORE 4x4 club would also like to announce the CORE fees are now due socould you please organise payment to our treasurer, Dave Bonneveld, eitherthrough cash or direct debit which Dave will let everyone know the process todo this. It is also important that you return your CORE membership form so wecan have updated and accurate records on hand.

The benefits of CORE membership are many and just to highlight a few below1. Membership to CORE 4x4 club and the 4wd association of S.A

2. Public liability cover up to $20 million for you and your passengers3. Access to exclusive properties4. Use of club equipment5. Ability to come on organise club trips6. Fellowship and fun7. Access to training days

Anyway I hope you all can rejoin with us and see CORE continue to improveand move forward and show the community that Christians are not boring pew

warmers but people like everyone else without all the swearing and bravado.

Thanks CORE Committee


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Core Torque Winter 2011

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