Eaton HO72 Axle Shop Manual

[Joe P]

Good day all! Could someone direct me to a repair manual for the HO72 Axle? I want to replace my leaky pinion seal but cannot undo the large yoke nut. Yes, I did get the rusty cotter pin out completely and yes, I do have the leverage and correct socket, which I ground the OD to fit into the yoke and get full engagement on the nut. Thinking I can undo the flange bolts and pull out the pinion gear together with the pinion bearing but want to be sure there's nothing else like a snap ring or circlip holding it together. Thanks!

[Getter-Done]

Here is a thread that I hope will help you.
In the link below.

If the answer is not there
I will help you search the forum for another.

H072 or H052 will bring a lot of info to the top.

Hope this helps

Maybe someone else will chime in.

Link: https://67-72chevytrucks.com/vboard/...highlight=ho72



















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[Joe P]

Yes thank you that link was very helpful. I read through the link you sent and all the Pirate 4x4 postings on the H072 as well. Based on the info I read there, I pulled of the bearing retainer and pinion gear out. I found that the PO had been in there, lots of orange RTV. The flange nut was hacked up with a chisel and the pinion support bearing (the small one) had disintegrated, galling the bearing surface on the pinion gear. I have a very nice spare center section that I will put in for now but unfortunately it's got 5.13 gears, so the 4WD lever will be off limits until I can find another one... Thanks again!

[Short 3/4]

Originally Posted by Joe P

Yes thank you that link was very helpful. I read through the link you sent and all the Pirate 4x4 postings on the H072 as well. Based on the info I read there, I pulled of the bearing retainer and pinion gear out. I found that the PO had been in there, lots of orange RTV. The flange nut was hacked up with a chisel and the pinion support bearing (the small one) had disintegrated, galling the bearing surface on the pinion gear. I have a very nice spare center section that I will put in for now but unfortunately it's got 5.13 gears, so the 4WD lever will be off limits until I can find another one... Thanks again!

I'm on the other end of the country, but just took a few HO's apart, so may be able to help with some parts if you can't find any locally
Tom

[Joe P]

Thank you for your note. I will PM you separately with parts requests. I will probably need a few things. Stay safe!