Wrecker boom winch motor. Need new seal.

[corvette9]

Last week I was using my 936A2 and the boom winch motor started leaking where the manual shaft comes out the rear of the hyd. motor. The motor comes right off, less than 1/2 hour and it was on the bench. I pulled the front cover and found the seal that is leaking.

Now the fun part. There is no number on the seal. That would be to easy. Anybody here ever have to replace that seal? Any good idea where to get one. I did call memphis equip. but they have nothing. No listing. no numbers. I will call some others today but thought maybe someone here has been down this road. Never hurts to ask. The motor dose not even have a tag or stamping to identify it.

Brian G.

 

[porkysplace]

You should be able to find the manufacturer by looking up the NSN number in the parts TM for the motor . Dohead has posted several times recently how google the NSN number , look through his recent posts to find it.

 

[corvette9]

Thats part of the problem. I found the exploded view in TM 9-2320-260-34/2 figure 20-56. This is a 800 series TM. The motor is the same. When I found this page it seems like the next pages that would have all the NSN numbers that would match this page are not coming up. So I have the view but no info. Funny thing is that in the exploded view I do not see the seal.

 

[porkysplace]

Thats part of the problem. I found the exploded view in TM 9-2320-260-34/2 figure 20-56. This is a 800 series TM. The motor is the same. When I found this page it seems like the next pages that would have all the NSN numbers that would match this page are not coming up. So I have the view but no info. Funny thing is that in the exploded view I do not see the seal.

You should probably be using the TM's for the 939 series truck since it is a M936A2.

 

[corvette9]

I tried that but could not find the exploded view. The winch motor is the same M543 and up. I have called every MV parts place I know and none can find the parts I need in the TM. looks like I will have to check some hyd. repair places or I'll have the cover machined for a common seal. This is crazy. For a few dollar part my truck is down and nobody in the MV parts world has the seal or knows what I'm talking about. I must be the only one to ever have this seal leak.

 

[porkysplace]

Is there a seal supply company near you ? if you can get the seal out without to much damage they should be able to match it . You may be able to mic everything out and give them the dimensions also .

[h=3]A & L Eastern Hydraulic Inc - New Haven, CT (Connecticut ...[/h]

 

[corvette9]

A&L is one of the places I will go to. They fix my frame machine pumps a few times a year. I just thought it would be an easy part to get. It is such a poor setup I figured it would be a common seal.

Brian G.

 

[M35A2-AZ]

Let us know what you come up with.
My wrecker has the Parker motor on it and I have had that rebuilt.

 

[Scar59]

Subscribed , haven't started working on my wrecker yet, however it has several static leaks that I have not looked at. Hopefully just seals.

 

[gringeltaube]

Search is our friend: http://www.steelsoldiers.com/showth...on-my-M936A1&p=1213261&viewfull=1#post1213261


G.

 

[corvette9]

That search may be of some help. Thanks. In post #11 by nf6x he shows two pics. The top one is on his 936 the other a 543. My 936 has the same pump as his 543. So the pic of the tag should be my model number. Mine is leaking where you see the the 4 point shaft sticking out of the motor. That must be so you can work the motor with a 4 point socket. I'll do some research today. When I find numbers for the seal I will post them.

Brian G.

 

[corvette9]

I found the right seals. the seal numbers are 8406-0137. 8400 series nitrile u cup 1.375x1.750x188.

There are two of these in the motor.They go on the shaft that go into the winch and the other end is the 4 point shaft sticking out the rear of the motor. I found them at a hydraulics comp. near me. I'll get it back together in a few days.

 

[country]

we have a 5 ton wrecker hydraulic motor, used, as-is condition for $375

please email or call us directly

thanks
dave

www.easternsurplus.net

 

[charlesmann]

old thread i know. but my winch motor is starting to leak in the same place. is there a depot level tm out there for these things, or is it a, take it to the dealer type rebuild?

 

[Snughill]

old thread i know. but my winch motor is starting to leak in the same place. is there a depot level tm out there for these things, or is it a, take it to the dealer type rebuild?

On the ones we have done pop the front plate off where the wind nut is clean the shaft and replace the o ring should be good to go. It seems if they sit for a long time the shaft rusts and tears the o ring.

 

[Snughill]

Oshkosh has the o ring go on their site and they will ship

 

[charlesmann]

On the ones we have done pop the front plate off where the wind nut is clean the shaft and replace the o ring should be good to go. It seems if they sit for a long time the shaft rusts and tears the o ring.

are we talking bout the same place? maybe i misread where his was leaking. here is my thread with a pic.

M936A2 crane winch motor

iv got a leak on my winch motor, out of something that does turn. not sure what it is (has a male sqr drive head on it), but i have tried to adjust it, counting half revs from 1 direction, back to where it was, then the other direction. but its still leaks and is worse (as it should be intros...

www.steelsoldiers.com

not sure if its the same place, unless the o-ring he is talking about goes on both the output and inside of the housing where mine is leaking from.