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CVRT final drive oil seal replacement

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If it'd the internal Quill shaft seals, you either have to remove the gearbox or final drive to get the shaft out. The seal replacement is straightforward. Personally I'd probably remove the final drive as while a heavy job, means you don't have to drain coolant, bleed steering and strip half the vehicle. If it's the outer drive hub seal, break track, remove sprockets and strip as per an epicyclic reduction hub (like a normal hub but with gears). I've done both, and got a final drive in and out using only a couple of pry bars and walking the final drive carefully down bits of wood. Not too difficult jobs either way, just heavy bits of kit.

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Pretty sure its the outer seal, there's oil on outside casing and on the tracks, so it's coming from the hub to casing seal.

 

Anyone know were to get the seals? Parts list shows 3 seals FV814177 fibre ring seal, FV814176 seating ring seal and FV758199/4 torodial sealing ring. Banisters?

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Try Bannisters but I think it may also be a commercially available one. I know the Quill shaft seal is special as I had a few sets made up some years ago.

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The Xmod did have quill shaft seals, as I bought a pair! but check against The Alvis Part number not the FV/NSN number.

 

There is also a tool to remove the final drive, a hinged bar which screws into the large bolt hole above the final drive, supported at the opposite end by a jack, a chain is slung over the bar and fixed to the two oil drain hole. guide pins are screwed into the hull through the final drive and the drive is slid along the bar when unbolted.

 

Diana

 

 

Try Bannisters but I think it may also be a commercially available one. I know the Quill shaft seal is special as I had a few sets made up some years ago.
Edited by Diana and Jackie

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Anyone got a 'how to' for replacing the final drive oil seals?

 

(The seal between the hub and casing)

 

Cheers!

 

Hi . i found that a pallet trolley and two long bits of threaded rod gets final drives off and on quite simply.

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Hi . i found that a pallet trolley and two long bits of threaded rod gets final drives off and on quite simply.

 

But I don't need to take the final drive casing off to change the hub sea, do I?

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But I don't need to take the final drive casing off to change the hub sea, do I?

 

Correct. It can be quite a job to get the hub drive flange off, so be prepared for a fight.

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But I don't need to take the final drive casing off to change the hub sea, do I?

 

Correct. It can be quite a job to get the hub drive flange off, so be prepared for a fight. Still need to break tracks and get the sprockets off though.

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Best way to get final drive off in the field is put a small bottle jack or porta-power ram on top of the final drive under the side skirt and push down gently and "crack" the final drive off the hull so it falls on your foot!

Handy hint , check the snugness of the roll pins that hold the brake discs on , I think from memory there are about 6. These can often be cracked and have worked the holes loose, quite often you cannot see this unless you strip the final drive unit off and it is sitting on the floor for inspection, Cheers Andrew.

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Correct. It can be quite a job to get the hub drive flange off, so be prepared for a fight. Still need to break tracks and get the sprockets off though.

 

The flange is held on with bolts and roll pins, right? I have the mother of all bearing pullers, so I am sure I will be able to rig something up, if it doesn't want to play ball.

 

Can anyone tell me what the seals actually are? One may be just a large o-ring, which is easy to source, but not sure about the fibre seal (presumably a dust seal)?

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Why have you not got the spare parts manual (common items)? That would answer a lot of your questions.

 

Diana

 

 

The flange is held on with bolts and roll pins, right? I have the mother of all bearing pullers, so I am sure I will be able to rig something up, if it doesn't want to play ball.

 

Can anyone tell me what the seals actually are? One may be just a large o-ring, which is easy to source, but not sure about the fibre seal (presumably a dust seal)?

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Why have you not got the spare parts manual (common items)? That would answer a lot of your questions.

 

Diana

 

Yes I have the parts lists but the MOD and Nato numbers are not showing up much info. I was wondering if these are available as commercial parts.

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Item 24 shows the seal, its a standard synthetic rubber seal along with its dimensions - so you should be able to get one at a seal supplier or online.

 

Diana

 

 

 

 

 

Yes I have the parts lists but the MOD and Nato numbers are not showing up much info. I was wondering if these are available as commercial parts.
Edited by Diana and Jackie

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Item 24 shows the seal, its a standard synthetic rubber seal along with its dimensions - so you should be able to get one at a seal supplier or online.

 

Diana

 

So it's a nitrile o-ring then?

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The inner hub seal is nothing special, although I think I went for a "high Temperature" one from a local bearing and seal supplier, it may have been a "double lip" one as well, Cheers Andrew.

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Hello my tracked Friends :cool2:

 

I have the same problems, oil is leaking out of both final drives on my Spartan. I've tried to use thicker oil, but also this was not preventing the oil to drip out on the tracks.

 

Please let me know how what kind of seals you use and how you are processing.

This will be a winter job over here in Switzerland for me :-)

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