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Case Tractors Discussion Forum
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Differential brake shaft protector

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JGarner

10-15-2007 11:10:10




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I have seen other posts on this site about replacing the seals on the 430/530/630 differential brake bearing housing. After ruining 2 seals (put new ones in the old came out, now I know why they leaked)I decided I needed a better way to cover the splines on the shaft to protect the seals. The aluminum can idea worked but just didn't give me a smooth transtion at the seal land to slide over.

My 630 service manual shows a guide that slips over the spilne and I have seen one sell on ebay, but that looked like a lot of work to make one and my access to a lathe is spotty. Here's what I figured out after putting my calipers on the spline. The spline OD is 2.245" and the OD of the shaft where the seal sits is 2.500" Went down to NAPA and spent $3.00 on an exhaust pipe reducer, 2 1/2" pipe to 2 1/4" pipe. Now I have a guide with a 2.250" ID and 2.500" OD that slips on the spline and allows a smooth transition to slide the seal over. Just file off the rough edges on both ends of the reducer and dress with sand paper for a good round edge. Slide/tap the piece on the spline and put a strip of 2" wide shipping tape on the 2.500" OD recducer/seal land, slip the bearing housing on, engage o-ring and pull up with bolts then slide the reducer off, no more cut seals.

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Jim B

10-15-2007 20:08:25




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 Re: Differential brake shaft protector in reply to JGarner, 10-15-2007 11:10:10  
For our 580CK axle shaft seal replacement I made a seal protector sleeve out of an aluminum frozen orange juice can. With a couple wraps of masking tape over the splines it fits snugly over the spline area of the shaft. Then because it's really thin aluminum it can simply be pushed further onto the shaft (onto the seal surface portion of the shaft) and it's diameter expands to fit the shaft nicely. Worked good enough that we saved it for future use.

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mEl

10-15-2007 19:22:11




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 Re: Differential brake shaft protector in reply to JGarner, 10-15-2007 11:10:10  
When i do diff seals and do not have a seal sleeve I simply wrap the spline with electrical tape and wrap a few extra layers as i go back towards the seal area to increase the diameter, when I get to the seal area I put one wrap up on the seal area and then install the seal plate and then just pull the tape off it comes right out from under the seal, I have used this method for years successfully, simple and effective

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bradley martin

10-15-2007 16:34:56




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 Re: Differential brake shaft protector in reply to JGarner, 10-15-2007 11:10:10  
Great idea...thanks for the tip.



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