4510 pump leak

[bobhaas]

front drive pump is leaking oil out the linkage shaft. wondering if it has a lip seal or has an Oring. and if so, can an additional one be installed on the shaft without disassembling it. basically can i slide a Oring onto the shaft and into the opening to stop the leak?

 

[Tazza]

Never donw one, but i would assume it is a lip seal..
Is there a plate bolted to the pump where the shaft comes out of?

 

[bobhaas]

Never donw one, but i would assume it is a lip seal..
Is there a plate bolted to the pump where the shaft comes out of?

No plate. It just comes out the side. And the shaft looks to be less than 1/2" dia. So I can't imagine a lio sealbthat small on a shaft that doesn't spin 360°.

 

[Tazza]

No plate. It just comes out the side. And the shaft looks to be less than 1/2" dia. So I can't imagine a lio sealbthat small on a shaft that doesn't spin 360°.

If there is no plate, looks like you will need to dismantle the pump to gain access.....
You can get pretty small lip seals, but you never know, an Oring on quad ring may be all they used

 

[4510]

No plate. It just comes out the side. And the shaft looks to be less than 1/2" dia. So I can't imagine a lio sealbthat small on a shaft that doesn't spin 360°.

Bobhaas, I have a leak on both my drive pumps, where the rotating control shaft enters the pump. I also think it is a lip seal. Did you find a way to seal this up? Leaks even when the machine is off. I will let you know if I find a way. Chris

 

[4510]

No plate. It just comes out the side. And the shaft looks to be less than 1/2" dia. So I can't imagine a lio sealbthat small on a shaft that doesn't spin 360°.

Update: I changed trunnion seals on both pumps. (where the propulsion control shaft enters the pump) It is just a C-clip, a collared washer, and two O-rings. $65 per pump from Gehl. Fairly easy job. No more leaks. Hardest part was getting the control linkages out of the way. If you need a part # I can find it for you.

 

[Tazza]

Update: I changed trunnion seals on both pumps. (where the propulsion control shaft enters the pump) It is just a C-clip, a collared washer, and two O-rings. $65 per pump from Gehl. Fairly easy job. No more leaks. Hardest part was getting the control linkages out of the way. If you need a part # I can find it for you.

Glad it's fixed, shame the seal kit was that much per side.... Yet hopefully it's the last time you will need to do it.

 

[mmsllc]

Glad it's fixed, shame the seal kit was that much per side.... Yet hopefully it's the last time you will need to do it.

Until recently, I have always had to 'send-out' any hydraulic cylinder or valve that leaked fluid. It was only until recently that I figured out that most of these jobs I could do myself. I work as a mechanic & I repair a lot of these type things these days. I feel so fortunate that these parts are even available to us. The hydraulic repair shops around here sell these repair jobs for well over a grand per pump / cylinder. Valves are usually less, but I have hear a bunch of mess about how expensive the PARTS are. I spent $1200 on TWO (2) autocrane cylinders that were both leaking on the wiper seals. IF they were not a CRANE, I would have done those myself, but with cranes come certifications to use them on the naval bases / army posts that I go to.

 

[4510]

Until recently, I have always had to 'send-out' any hydraulic cylinder or valve that leaked fluid. It was only until recently that I figured out that most of these jobs I could do myself. I work as a mechanic & I repair a lot of these type things these days. I feel so fortunate that these parts are even available to us. The hydraulic repair shops around here sell these repair jobs for well over a grand per pump / cylinder. Valves are usually less, but I have hear a bunch of mess about how expensive the PARTS are. I spent $1200 on TWO (2) autocrane cylinders that were both leaking on the wiper seals. IF they were not a CRANE, I would have done those myself, but with cranes come certifications to use them on the naval bases / army posts that I go to.

I have always had trouble paying someone else to do what I am usually fully capable of. I have a mechanical background, but hydraulics is not my strong suit. I understand the theory and can read the drawings, but I have little experience tearing apart pumps or valves, telling what is worn or not. In this case it was easy to tell what was wrong, and the parts were just O-Rings and snap rings. This old Gehl has taught me a lot, and I think she is not done teaching me unfortunately. When it warms up I have a couple leaky cylinders to replace seals on. Long the live the DIY's!

 

[mmsllc]

I have always had trouble paying someone else to do what I am usually fully capable of. I have a mechanical background, but hydraulics is not my strong suit. I understand the theory and can read the drawings, but I have little experience tearing apart pumps or valves, telling what is worn or not. In this case it was easy to tell what was wrong, and the parts were just O-Rings and snap rings. This old Gehl has taught me a lot, and I think she is not done teaching me unfortunately. When it warms up I have a couple leaky cylinders to replace seals on. Long the live the DIY's!

I support the DIY spirit. I have a hard time paying someone to do something that I can do myself. I've found that even if I'm completely lost at doing something, I usually do it better & cheaper than anyone else I could ever hope to find. I think doing it yourself could easily help build experience based confidence that you say you didn't have before. Doing it yourself is a great way to become more intimately familiar with your machine. If you never tried, you might not ever fixed it yourself or saved yourself that repair cost money.