Case 930CK Leaking at Throttle Linkage?

[Valdfur]

My 1966 930CK Western Special sprung an oil leak at the throttle linkage on the injection pump. This is the later style pump lubricated by engine oil, however I don't want to remove the governor housing before seeking advice for fear of misaligning something and I'm not quite sure how to fix the leak. Any advice would help!

Thanks a lot!

 

[jon f mn]

That is a common leak on those. Repairs are difficult because that hole gets worn. My local injection shop has a way to fix it by epoxying in a new bushing and seal, but I don't know how he does it. That's the only solution I've seen that works long term.

 

[mEl]

Jon is correct in his assessment of the problem, if by chance it is a shaft leak rather than the housing worn, there is a fat Oring there that is easily replaced by removing the governor throttle arm. While probably not as good as the epoxy repair, I have cleaned them down and dried everything and ran Red Loctite along the bushing, warmed it with a heat gun to set the Loctite. I have been successful with that. If you do choose to do a repair yourself and have never done one, there is a latch that has to be flipped up after you have the governor cover loose to disconnect the rack linkage and a spring that must carefully be disconnected from its bracket.

 

[Dieseltech]

Common problem over time on any Bosch RSV governor cover, the bushing starts turning with the shaft and spins inside the governor cover and getting loose causing leaks. I use two part epoxy to make the repairs when that happens after the cover assembly is disassembled for cleaning as that cover is expensive to buy now. With a NEW cover and bushing years ago I would use some red Loctite and the bushing would stay put, but that won't hold when used/worn bushing and bore are being dealt with. The LATEST RSV bushings have a two screw clamp so the bushing can't spin. I repaired two Case and one JD RSV governor cover leaks last summer removing the cover assembly only leaving pump on engine, but as Mel said a fellow MUST be careful doing so. If the control linkage is NOT connected to the rack right you will probably have some rods come through the block sides when the engine runs away.

 

[Valdfur]

That is a common leak on those. Repairs are difficult because that hole gets worn. My local injection shop has a way to fix it by epoxying in a new bushing and seal, but I don't know how he does it. That's the only solution I've seen that works long term.

Alright, thanks, I guess I'll just leave it be for now!

 

[Valdfur]

Jon is correct in his assessment of the problem, if by chance it is a shaft leak rather than the housing worn, there is a fat Oring there that is easily replaced by removing the governor throttle arm. While probably not as good as the epoxy repair, I have cleaned them down and dried everything and ran Red Loctite along the bushing, warmed it with a heat gun to set the Loctite. I have been successful with that. If you do choose to do a repair yourself and have never done one, there is a latch that has to be flipped up after you have the governor cover loose to disconnect the rack linkage and a spring that must carefully be disconnected from its bracket.

Alright, thanks. I think I'll leave it alone for now, it's not too bad of a leak

 

[Valdfur]

Common problem over time on any Bosch RSV governor cover, the bushing starts turning with the shaft and spins inside the governor cover and getting loose causing leaks. I use two part epoxy to make the repairs when that happens after the cover assembly is disassembled for cleaning as that cover is expensive to buy now. With a NEW cover and bushing years ago I would use some red Loctite and the bushing would stay put, but that won't hold when used/worn bushing and bore are being dealt with. The LATEST RSV bushings have a two screw clamp so the bushing can't spin. I repaired two Case and one JD RSV governor cover leaks last summer removing the cover assembly only leaving pump on engine, but as Mel said a fellow MUST be careful doing so. If the control linkage is NOT connected to the rack right you will probably have some rods come through the block sides when the engine runs away.

Yeah, definitely afraid of a runaway, I'll maybe fix this at a later date. It's not a terrible leak