Les Henson Posted September 5, 2006 Share Posted September 5, 2006 Not much of an intro to this one. The diff pinion oil seal wears out from all the trips to Tesco's, and replacing one is not too bad - with the exception of the flange centre nut, which 99% of the time requires explosives to get undone. Method of replacing the seal is the same as any other L/R - the nut and it's tightness varies though, and you should make sure that the method/torque wrench setting is correct for you axle. Signs of the oil seal failing is what you would expect - yet another pool of oil on the drive, a quick check underneath will confirm - Raise the drivers side wheel and put an axle stand under the axle. There's plenty of room around the rear prop/axle to get at all the bolts, so apply hand brake. The prop is held to the flange by 4 x 14mm head nuts/bolts, so propshaft tool and 14mm spanner. Once all 4 are removed - cable tie the prop out of the way. The flange centre nut can now be seen. This is the early castellated nut and split pin type - later models have a nyloc nut. The axle case has to be drained, and there's a square key bolt almost at the bottom - a 1/2 drive extension bar with no socket fits just nicely. Clean around the drain plug and then remove it. The flange centre nut is very tight, a breaker bar was neede to undo it. Retrieve the washer, and the flange will then just slide off the pinion shaft. The reason this seal failed was because it had been renewed incorrectly. This type of seal has to be fitted with the raised centre level, or slightly below the axle casting. Whoever fitted it just put it so that the edge was level with the casting - the result was that the drive flange wrecked the seal. The diff pinion oil seal has an inner and outer lip - each with it's own retainer/tensioner. This was all that was left of the outer one. Raised outer lip on the new seal - this has to be level or slightly lower than the axle casting. The inner lip - again with it's own retainer ring. Clean the axle case and then tap/press the new seal in the correct amount. Re-assemble the flange according to your axle/nut type, and re-attach the prop. Replace the drain plug and then fill the axle case with the correct amount of fresh EP80/90 oil. Les. Quote Link to comment Share on other sites More sharing options...
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