Hello working on my case skid steer 85xt I was loosing power in left side did flow test and think i narrowed it down to drive motor, I pulled motor apart to look for any signs of metal debris or blown seals, the seals didn't look great but were still one piece and no noticible metel shavings but I noticed this rubber in couple spots were I don't believe there's supposed to be a seal not sure if its rubber or silicone and I'm wondering if a good cleaning and seal kit will fix it.
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85xt drive motor
- Thread starter m1008
- Start date
mark ingeman
Member
did you have to remove the twin pumps to be able to remove the drive motor?
GaryHoff
Senior Member
Yes, you have to remove the pumps to get to the travel motors.
The blown seal may be part of your weak travel issue. Its definitely worth replacing.
Hope you marked the housing before disassembly.
The blown seal may be part of your weak travel issue. Its definitely worth replacing.
Hope you marked the housing before disassembly.
No I didn't remove the pumps, I pulled the drive motor parking assembly as one out the front. Yes I marked the housing. Although I need to find something better to mark them with cause my lines were fading when I was cleaning the housing up
jacobd
Well-Known Member
Brake clean cuts through the oil well but I don't like using it on very sensitive parts like that because it chills them and then moisture condenses on them. Not a big deal but it can be annoying. Plus it's expensive. I clean stuff like that with kerosene in a recirculating parts washer sink. Just wear good gloves and try not to breath too much 
GaryHoff
Senior Member
I usually use a dermal or similar to mark things on hydraulic components. I haven't found any marker that holds up to brake clean and oil.
GaryHoff
Senior Member
You will need to fill up the case drain of the motor. It may take a minute or so for the charge pump to work out the air from the system, any longer and there is likely a issue. You said you didn't remove the pumps, so you shouldn't have to prime them.
Well got it going and it didn't fix it. Anyone know of a place to get a drive motor cheaper than case dealer? When I was talking to case dealer they were talking like I'd have to get the parking brake assembly too beings mine is an early model. Also any other ways to be 100% positive it's the drive motor?
alrman
Senior Member
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There is some scoring evident in those pictures which is not good.
Unfortunately, your pump will look exactly the same. Pressure & pump efficiency is lost through those scratch marks.
If you install a new drive motor with worn pumps, you are throwing time & money to the wind.
You really need to overhaul the pumps as well & that is a specialized repair best left to a shop that has the ability to bench test their work after repair.
Unfortunately, your pump will look exactly the same. Pressure & pump efficiency is lost through those scratch marks.
If you install a new drive motor with worn pumps, you are throwing time & money to the wind.
You really need to overhaul the pumps as well & that is a specialized repair best left to a shop that has the ability to bench test their work after repair.
Thanks for the advice, guess I got some thinking to do, I bought machine to dig my basement and do landscaping for my house I'm building witch basements done. Might be farther ahead selling it broke and cutting my losses. It's only got 2200 hours on it so it really sucks to have this big of problems
jacobd
Well-Known Member
If you put a flow tester on it and you're sure the pump checks out good you should be able to r&r just the motor. Used parts are always an option. Buy from a yard that will stand behind their parts and flush it before use. You also might be able to replace just the worn parts in the motor you have to save some $$$.
I wouldn't give up hope just yet.
I wouldn't give up hope just yet.
Ya I had a pressure guage and flow meeter on it and everything was in spec according to my manual, except left drive motor was loosing too much flow when I put it under load. supposed to only drop like 2 GPM and witch right side did, but left would drop over 10gpm