case 970 hydraulic problems

Anonymous-0

Well-known Member
I have a case 970 that I just put a re-man hydraulic pump on, changed the fluid, and both filters. I can barely see a difference in the performance of the tractor. I still have to rev the engine wide open to raise my corn planter and disk. If I push the clutch down, the hydrualics will barely work at all, is this normal? Shouldn't a new pump raise any implement regarless of engine speed, I expect it to be slow at a low rpm, but it won't move my 6 row planter at all unless its at half throtle or more.
 
Todd, with the tractor running try lifting the planter in 1 powershift, 2 ps, and 3 ps. Then try it in Rev and then with the clutch pedal down. In all 5 of these positions the planter should raise at about the same speed indicating there is probably not a large oil leak in the P shift. A noticeable lifting speed among the different positions indicates a P Shift leak issue. Because you replaced the hyd pump and that did no good and if the P Shift checks out OK your problem is more than likely a faulty relief valve. This is why I always stress doing a flow and pressure test on the tractors BEFORE replacing components, I hate seeing people spend money when not needed. Rod.
 
Do not throw your old pump away, if it is still in useable condition it is worth more than the core price you would get from a dealer. It should be easy to sell.
 
Rod, I already sent my old pump back for the core price. I am pretty confident the old pump was weak becase I had problems with every implement once the tractor warmed up. Soon as you started the engine, it would work fine, but as the oil came up to operating temp, the would get weaker and weaker. I disasembled the old pump and looked at it,and it had lots of wear and groves and gouged in it. One thing that also has me puzzled is when I changed the filters, I found a little tiny spring, about .250" in diameter and an inch or so long in the bottom of the filter canister. Any ideas where that could have came from? I have only had this tractor for a couple of years and haven't put over 100 hrs on it. So I don't know anything about it's past.
 
I'll try raising the planter in the different gears soos as I get a chance and I'll let you know how it turns out.
 
I checked the tractor in all three ps positions as well as reverse and I couldn't tell any difference in how the planter raised. However, it will barley raise it at all with the clutch down even with the engine wide open. Any sugestions?
 
I thought someone just had a problem not long ago where the modulator on clutch was losing oil and short changing the rest of the circuit. Not real sure of this. I know I would sure try to get the pump flow rated right at the pump so you know if pump is good so you know where you stand.
 
I have a 970 when you depress the clutch all the way it will kill the engine, also the left brake kept locking up so we would release pressure on it but with in 15 or 20 minutes it would build pressure again also the remotes lost power put a pump on awhile ago any ideas
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top