930 case hydraulic pump problem

davigreg · Jun 12, 2016

Hi everyone need help here, need some pics and instructions on case 930, a 1964 with serial #8250496, this tractor has the hyd. pump below the pto shaft not above, (have 3 different manauls but all show the hyd.pump above pto shaft, the problem i have is it just stopped working everything checks out good but no out put to brake away hyd. couplings, it was never low are hot and not ever low, the past owner did put in hyd. fluid that is not what it calls for I was thinking this mite have clogged something up but would like the pics on where everything is on this model, with the hyd pump under the pto shaft.

jon f mn · Jun 12, 2016

Does the pto work? A sudden stop like that
can be many things. If the pto works then
there is a coupler between the pump and pto
that could have failed. There is also a
rubber gasket between the pump and pickup
tube that could have failed. Could also be a
broken spring in the relief, that is under
the large nut on top of the unit. Those
tractors can take most any kind of oil so I
doubt that is your problem.

davigreg · Jun 12, 2016

(quoted from post at 11:54:29 06/12/16) Does the pto work? A sudden stop like that
can be many things. If the pto works then
there is a coupler between the pump and pto
that could have failed. There is also a
rubber gasket between the pump and pickup
tube that could have failed. Could also be a
broken spring in the relief, that is under
the large nut on top of the unit. Those
tractors can take most any kind of oil so I
doubt that is your problem.

ok Jon thank makes sense now any pics are manuals I can get, like to have those before I tear into things as the 3 i got deal with Hyd.pump above pto shaft not below and I was told this set up is a different little monster so looking for the right manual to. an thanks for reply.

jon f mn · Jun 12, 2016

I don't have any manuals, sorry. Try posting on the case forum, there are a lot of good helpful folks
over there. I know that several of them are really busy right now tho, so it might take a day or so for
a response over there.

bradley martin · Jun 12, 2016

The pump drives with a roller chain?...it may have come apart!

davigreg · Jun 12, 2016

(quoted from post at 15:53:33 06/12/16) The pump drives with a roller chain?...it may have come apart!

ok do u know where I can get access to this chain as I don't have the Manual yet I am hoping some 1 can show me this schematic drawing then I will know where and what to expect,thanks Bradley

bradley martin · Jun 12, 2016

I am not at home so I can not scan you picture right now. I am not sure if you can access it by removing the vale/pump
assembly. I replaced mine when I had the entire rear housing removed in order to access the differential. Good luck!

davigreg · Jun 12, 2016

(quoted from post at 19:36:02 06/12/16) I am not at home so I can not scan you picture right now. I am not sure if you can access it by removing the vale/pump
assembly. I replaced mine when I had the entire rear housing removed in order to access the differential. Good luck!

yup u where rite said hell with it cracked open the little access door near the top and seen that the chain was loose so took filter out and reached in and the outer shaft to the pump was cracked an just spinning around the inner shaft, it never even made a noise. the guy I just got this great running tractor for $850.00 said it was out for 5 years an never made a noise, well any way thanks an if u run across that drawing please forward, thanks for all the help.

930 case hydraulic pump problem

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