I recently rebuild the hydraulic pump on my Super A (with the help of this forum). Problem was the pump shaft was worn allowing hydraulic fluid (ISO 32) to leak into the engine oil. I did check to make sure the pressure release ball and spring looked ok...they seemed to be fine.
After reinstalling the pump back onto the tractor I decided to use motor oil in the hydraulics (10w 30). Thinking was if the pump shaft/seal still leaked into the crankcase, it could not contaminate the engine oil(could overfill it)
started the tractor...all is well till I increased the RPMs, lifted the plow...and pop...gasket blew out spraying oil out.
First pic here shows which gasket blew...second one is the gasket itself.
What I'm thinking so far...
The viscosity of the iso 32 oil and the 10w 30 don't seem that different...just sticking my finger in both....probably means nothing..but..
I'm pretty sure the pressure relief ball and spring in the pump were ok
I checked the bolts were tight, although I'm not sure of the torque.
I could have been more careful to clean the mating surfaces where the gasket goes.
In the pics attached, the gasket is the same orientation as when installed so you can see which one blew.
Any thoughts or advice?
As always...thanks for your help. I'd be even more lost without you guys
Scott
After reinstalling the pump back onto the tractor I decided to use motor oil in the hydraulics (10w 30). Thinking was if the pump shaft/seal still leaked into the crankcase, it could not contaminate the engine oil(could overfill it)
started the tractor...all is well till I increased the RPMs, lifted the plow...and pop...gasket blew out spraying oil out.
First pic here shows which gasket blew...second one is the gasket itself.
What I'm thinking so far...
The viscosity of the iso 32 oil and the 10w 30 don't seem that different...just sticking my finger in both....probably means nothing..but..
I'm pretty sure the pressure relief ball and spring in the pump were ok
I checked the bolts were tight, although I'm not sure of the torque.
I could have been more careful to clean the mating surfaces where the gasket goes.
In the pics attached, the gasket is the same orientation as when installed so you can see which one blew.
Any thoughts or advice?
As always...thanks for your help. I'd be even more lost without you guys
Scott