Rear End Seal for M818

[SHAMIK]

Hi guys! First time posting and this is an excellent site! good job guys! My question is my M818's rear axle is leaking oil where my drive shaft or jack shaft whichever you want to call it, goes into the rear end. Is this your pinion seal and is this a big job to replace and where can I get a replacement seal for this? Thanks

Here is a youtube link of our M818 a.k.a. BRUTUS in action... ! Enjoy http://www.youtube.com/watch?v=2-AuBdNFI5w

 

[Tow4]

Replacing the pinion seal is not that hard. I got my seals from bigmikem35a2 on Ebay for $15.95 each. I would buy a couple because if one is bad the others are probably not far behind. I have replaced 2 on my M818.

Read the TM first. I suggest using a 3/4 inch impact to remove and re-install the pinion nut. Use PB Blaster or WD40 if you have a hard time getting the pinion nut off.

The process is as follows:

Remove drive shaft if the flange the seal is leaking at is driven. Make a reference mark on the pinion flange and drive shaft flange so they get back together the same way.

Remove the cotter pin from the pinion nut. You need to be able to tighten the nut back to the same torque so make reference marks on all parts. Take a magic marker and draw a line across the pinion to show where the cotter pin is. Mark the pinion nut on the ears on each side where the cotter pin was on the nut, also mark the pinion flange.

Remove the pinion flange nut. The pinion flange should now just pull off. Check the pinion flange seal surface and make sure it is smooth. One of mine had some scratches that I had to sand out with some 1000 grit paper and buffing compound. If there is a lot of scoring you can have a new sleeve installed on the flange.

Remove the cover that has the seal and remove the seal. Clean the mating surfaces where the seal goes and where the cover mounts to the differential. Clean the mounting surface on the differential.

Put a bead of RTV where the seal goes and install the new seal. Check to make sure RTV has not gotten on the front of the seal; wipe it off if necessary. Apply a bead of RTV around the cover mounting holes. Re-install the cover on the differential.

Put a little grease on the seal lips and noting your alignment marks re-install the pinion flange. Re-install the nut and torque it down until the marks line up with the marks on the pinion. Re-install the cotter pin. Re-install the drive shaft if applicable.

Check the oil level and you are done.

 

[Warthog]

And you can get your free Technical Manuals at this site:

www.jatonkam35s.com

Use the M809 series manuals.

 

[SHAMIK]

Replacing the pinion seal is not that hard. I got my seals from bigmikem35a2 on Ebay for $15.95 each. I would buy a couple because if one is bad the others are probably not far behind. I have replaced 2 on my M818.

Read the TM first. I suggest using a 3/4 inch impact to remove and re-install the pinion nut. Use PB Blaster or WD40 if you have a hard time getting the pinion nut off.

The process is as follows:

Remove drive shaft if the flange the seal is leaking at is driven. Make a reference mark on the pinion flange and drive shaft flange so they get back together the same way.

Remove the cotter pin from the pinion nut. You need to be able to tighten the nut back to the same torque so make reference marks on all parts. Take a magic marker and draw a line across the pinion to show where the cotter pin is. Mark the pinion nut on the ears on each side where the cotter pin was on the nut, also mark the pinion flange.

Remove the pinion flange nut. The pinion flange should now just pull off. Check the pinion flange seal surface and make sure it is smooth. One of mine had some scratches that I had to sand out with some 1000 grit paper and buffing compound. If there is a lot of scoring you can have a new sleeve installed on the flange.

Remove the cover that has the seal and remove the seal. Clean the mating surfaces where the seal goes and where the cover mounts to the differential. Clean the mounting surface on the differential.

Put a bead of RTV where the seal goes and install the new seal. Check to make sure RTV has not gotten on the front of the seal; wipe it off if necessary. Apply a bead of RTV around the cover mounting holes. Re-install the cover on the differential.

Put a little grease on the seal lips and noting your alignment marks re-install the pinion flange. Re-install the nut and torque it down until the marks line up with the marks on the pinion. Re-install the cotter pin. Re-install the drive shaft if applicable.

Check the oil level and you are done.

Thanks so much for the valuable information and you helped me alot!

 

[SHAMIK]

And you can get your free Technical Manuals at this site:

www.jatonkam35s.com

Use the M809 series manuals.

Thanks alot for your info.. I will certainly look at them!