5610 hydraulics

I am having problems with the hydraulics on my 1985 5610. It first started with the P.T.O. not engaging with the tractor at idle or low RPM's. The PTO clutch pack had been rebuilt about 6 months befor this started. You could speed the tractor up and the PTO would engage and pull OK. As time passed (about another 6 months) the PTO will not engage at all unless the tractor is cold and the 3 point will not lift much weight unless the tractor is running at high RPM's. The warmer the tractor gets the worst the 3 point problem gets. Any ideas on were to start looking? The fluid and filter has been changed. Thanks

Sounds like a loss of pressure... IE there is not enough pressure to make the pto clutch lock up.. etc.. nor enough for the lift. Could be worn pump.

I think I'd 'start' by popping a gauge into a QD and find out what pressure I could make at relief.

soundguy

I would follow soundguys advice.Be sure to check the pressures with the hydraulic oil cold and then recheck with the tractor at operating temp.A service manuual will be required for proper check procedures and specs.I would strongly suspect a worn pump or resricted filter.Or another possibility is a leaking seal or o-ring in the circuit.By rule of thumb loss of pressure as the oil warms points to a worn pump.

I'm voting pump. I noticed the ky in your user name, if you're close enough I've got a set of pressure and flow gages.

Has the pump been removed from the tractor at any point in time? If it has I'd look at the seals between the pump and the housing, but otherwise I'd suspect a bad pump. The pump and the oil level are the only thing that the sypmtoms you describe have in common in any way. I'd think it somewhat odd for a pump to be destroyed in that manner but I spose it's not impossible.
The other possibility is that you have various unrelated problems in the PTO regulating valve or control valve as well as the three point controls. That's not an impossible scneario either, but the pump would be the more logical connection...
If I didn't have gauges to test the system pressures then I'd probably haul the pump out and tear it down. If the bushings are badly worn and the housings cut away by the gears, toss it and buy a new one.

Rod

Hi guys something I did not mention in my first post. This tractor belongs to a neighbor and I work on his equipment from time to time. At the time that I rebuilt the PTO clutch pack the tractor also had transmisson problems. It would not stay hi range without holding it by hand (he was using a rope to tie it in hi range when he needed it).It had been running this way for about 2 years. He needed the tractor at the time of the PTO repairs and did not want me to take time to fix this problem. He brought the tractor back about 2 months later and I found a bearing down in the transmission. The oil was extrenely dirty and contaminated and the filter had been hit and crushed and looked like the original (1985) which would not surprise me knowing the neighbor. I guess this could contribute to pump wear seeing how metal shavings from the bad bearing had been running through the pump for 2 years. The fluid and filter were both changed at the time of the transmission repairs. Would a worn pump show up first at the PTO or could there be another problem with the PTO? Thanks. Kyhayman I am about 20 miles nouth of Russellville.

I'd just about bet on a bad pump after reading that.
In my experience a worn pump will first present itself as not having quite full lift capacity at idle or when the oil warms up. The PTO problem could be as simple as the filter screen in the rear housing of the pump being plugged with crap, shavings, etc. It's a square headed plastic plug. Remove it and clean the screen. I'd say it's somewhat unusual for the PTO pump to fail in a major way since it's a low pressure pump. Usually the main pump goes first due to it's higher operating pressure. Having a crushed filter could certainly contribute to starving the pump of oil which would quickly heat it and burn the bushings out. Who knows how many times it's been run low of oil besides that. What you're descriving doesn't sound like it's seen too much maintenance. Sounds just like my old man actually...
Best bet is to get a set of gauges on it and see what it makes. The main pump should put 2550 to the remote. The rear (PTO) pump should make 150-180# at 850 rpm with the oil warmed up. You can tap into that by looking at the pump housing... and there will be a raised area where the oil gallery for the PTO pump runs from the upper rear part of the housing to the bottom front on an angle. The Dual Power line will come from that gallery, or if there's no DP there will simply be an ORB plug in there. If the pump's been replaced in the past it may also have a 1/8" pipe plug in that gallery. One way or another, pull a plug or 'T' into it and get a 500 # gauge on it.

Rod