Author Topic: Tvan bearings  (Read 933 times)

Online Harry Lissimore

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Re: Tvan bearings
« Reply #15 on: May 16, 2019, 08:26:37 AM »
Thanks for that pete.

Testing the T4 would have been a real buzz with Ron Moon and all.  I'm jealous.  I can't wait to see the T4 at the upcoming Caravan show in Brisbane early June.

As for the battery issues, I haven't found the answer yet, although I now only charge the batteries for a few hours once a month when home, and I never plug the anderson plug in to charge the batteries from the car unless I have been camping unpowered and the batteries are down.  Usually the rooftop solar is sufficient to keep the batteries fully charged during the day when travelling.  Having done this since the batteries were new last August seems to be a good thing.  I tested the batteries last week by running them down to 65% charge, the resting voltage was about 12.4 and 12.2 under load from the ARB fridge so all is good so far.  The last batteries only lasted 12 months and a similar test would have taken the voltage under load to 10 or lower.

Thanks for your advice on the seals - I will continue to use the regular seals that Track provide.

Any ideas on what is the best grease to use. At the moment I'm using Castrol HTB.

Cheers

Harry
Formerly 2002 TVAN, now a 2015 Topaz Savannah and 2014 Isuzu MU-X LST

Offline Pete930

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Re: Tvan bearings
« Reply #16 on: May 16, 2019, 09:02:39 AM »
Harry glad to hear the battery issue is holding at the moment.

I havnt gone back to that post for a while but check in with peter mcc I think it is he seems to be all over 12v stuff from what I have seen.

As far as grease goes some folk will say use this one or that one “because it hangs on better”.

Some of the grease that I see that comes from new in vans etc is so damn thick I wonder how it keeps things lubricated, I think they use this as usually the bearing roller is covered but there is nothing at all inside the drum itself.

Think of it this way, as the grease warms up it should have the ability to “flow” a little, not to say it turns to water etc but be able to move around, by this ability it can “flow” towards the bearings to keep the lube up to them. This “flow” or more so a change in its viscosity should be present to protect the bearings

I do see a lot of grease that resembles the consistency of candle wax on a regular basis.

Some purists will bang on about how much extra moisture protection it will provide etc etc etc but as we have covered in this post and previous posts if regular servicing and dependant on the type of travel you do then a “standard” grease will suffice.

My go to grease is just Castrol HTB grease. It has a high enough temp rating and should you exceed the temp rating you will have more to worry about than a bit of grease coming out past the seals.

So in my meagre view, use standard seals, normal HTB bearing grease, service every 10,000kms or after each trip if extremely dusty and water crossings are involved, replace bearings when signs of wear on that you can feel with a finger nail, before a massive long distance journey (more so for peace of mind) or I would put a figure of 30,000 kms out there, not for any other reason than the bearings have done some work, are not that expensive in the big scheme of things and at that mileage have served you well, as Graham stated he swapped his out at 100,000kms and trust me I have worked on his Tvan and it has done some serious serious work and mileage.

Cheers Pete

Ps yes meeting Ron and Viv Moon was a treat as was travelling with them, we have stayed in touch and they came to stay with us in Burra on their way out to the west.

The T4 Trip was an adventure, Mid 40’s each and every day, not much under 30 degrees at night, so not really fun but yes an adventure. The T4 itself is an amazing unit, tows just like a Tvan maybe you can feel a touch more weight abut really really nice and stable to tow.
 We did come across some issues that will need addressing but I guess that since Track are probably one of the only manufacturers that do field testing the way we did it, people that but one will know it has sorted before they get one.

« Last Edit: May 16, 2019, 09:07:40 AM by Pete930 »

Online Harry Lissimore

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Re: Tvan bearings
« Reply #17 on: May 18, 2019, 10:13:40 AM »
Thanks for all that Pete.  Perhaps you can help me with another issue.

When replacing the Topaz bearings, I notice that the large washer between the castle nut and the outer bearing is marked on both sides from the outer bearing spinning.

Is this normal?  How do you limit this happening or does it not matter?  I have heard that you can make a small dent with a punch on the axle where the bearing sits to restrict the bearing spinning but I was hoping not to go down that path.  The bearings have been serviced/replaced 7 times in the past, and I have done the last 2 services and the scoring on the washer seems to have gotten a lot more pronounced in the last two times compared to all the earlier services.

How often should this washer be replaced if it's worn?

Thanks Pete.

Harry
Formerly 2002 TVAN, now a 2015 Topaz Savannah and 2014 Isuzu MU-X LST

Offline Pete930

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Re: Tvan bearings
« Reply #18 on: May 18, 2019, 12:41:04 PM »
Hey Harry, it’s common to see some marks on the bearing outside washer but in the main it’s nothing to really worry about.
If you are seeing small metal particles accumulating in or around the outer bearing then there may be an issue of sorts, probably bearing adjustment not tight enough.

What folk do is adjust the bearing, fit the spilt pin, put the dust cap back on an job done, however this can lead to the bearing being out of adjustment within a few kms and maybe why you are seeing increased wear in the bearing “thrust” washer.

You need to reseat the bearing back into its cone by expelling all of the unwanted grease from within the bearing.

So the way I suggest to adjust the bearing so as not to have the issue is as follows.

Tighten up the bearing nut till firm then go a little bit more, maybe 1/4 to 1/2 turn max.
Then spin the brake drum backwards and watch the excess grease come from within the outer bearing, wipe off as required.
Spin in opposite direction and do the same thing, keep spinning till the excess grease stops coming out of the bearing.

This should happen within a minute or so, then back off the bearing adjustment and adjust correctly.
Correctly is questionable as such but if you use the weight of the shifter on its own etc to “lock up” the bearing adjustment then see where the split pin hole is. You can go a bit more if needed to line up the hole, this is where the everyday experience comes into it to make the call.
On a “good” axle you will have the choice of two holes, some axles have only one hole and that is a pain, you either go too tight, not good, or back it off and too loose, not good either.

You can remove a small amount off of the back of the wheel bearing nut by placing in a vice and filing down the contact surface on the nut a little bit, this will allow the nut to rotate further and align the holes properly.

You can do the bearing adjustment with the wheel fitted and check for play, another trick if you are a bit unsure of the adjustment procedure.

What you mentioned re using a pin punch on the AXLE is not advisable in my view.

We use this process called peening (going old school now) on some bearing cone fitments where you may find an bearing cone spinning in the drum slightly, when severe you should replace the drum but if minor you can loctite the cone into the drum with a mid strength loctite, then at the edge of the bearing cone to drum use the pin punch to peen the surface.

What you are doing is gently expanding the metal in the drum which will lock in the bearing cone.

When you replaced your bearings I hope you kept the old cones, cut a slot in them with an angle grinder and used them as a sacrificial surface when pressing in tapping in the new cones, then keep them in the toolbox. The idea of the slot is that the cone will compress as you tap into the drum yet will be easily removed after the fitment of the new cone.

Best thing Harry on your next trip away come down through Burra SA or around those regions and I’ll take you through a service and give some pointers along the way.

Check out my Facebook page at Elite Mobile Caravan Service as well as from time to time there will be service tips on there as well.

Cheers Pete

Offline Jim and Lyn

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Re: Tvan bearings
« Reply #19 on: May 20, 2019, 06:14:43 PM »
Gday Peter,
That's great information about the seals and next service I'll be swapping back to the good stuff!
Cheers
Jim
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Offline Pete930

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Re: Tvan bearings
« Reply #20 on: May 20, 2019, 07:57:58 PM »
All good Jim, I’m happy to share my point of view and hopefully put a bit more of an experienced insight into it more so  than follow a marketing idea, or a concept with no theory behind it, if you know what I mean.

I certainly don’t have all the answers but feel ok with the reasoning behind what I do, those that disagree that’s fine, do what you want to do, but for me the aforementioned ideas work for me  each and every day.

Regards Pete