Jim, Last night I warmed up the tractor , with the bucket flat on ground ,rolled bucket in dump direction which lifted the front wheels off the ground with ease. Again tried to lift the front end with the loader arms , again it failed. Then did as you mentioned and raised the loader several feet off the ground to see if it holds. At this time, there was no load in the bucket and bucket in level position then I shut her down. Checked an hour later and lost 5 inches ( bucket still level ), Checked again this morning , lost another 16 inches, again bucket remained level. Does this tell me that the lift cylls are internally leaking thru or possibly the control valve ? I could'nt hear the relief valve making any noise / that 2 cyl motor may have had something to do with that. JJ thanks for the info, Im glad to hear the test kit can be had at TSC, ther'es one handy. WDCHD, Thank you also, I was unaware the cylls were designed for full pressure in one direction, with the V rings in one direction, that makes sence. I did'nt re pack the lift cylls so i was not aware the V rings being pointed in the other direction-( they were'nt leaking, at least externally ). I am tempted to order up packing kits for the lift cylls and a kit to freshen up the control valve. What do you guys think ?
hydraulic power / loader
- Thread starter mickd
- Start date
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J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
Are the cyl DA cyl and do you have two hoses going to each on lift arms cyl?
Usually in a SA cyl set up, one of the work ports is plugged, and a filter screen is in one of the cyl ports.
If your system is set up for DA operation, and
If your bucket is flat on the ground, and the cyl is fully retracted, and you push the down lever, you will not be able to lift anything. You are at the end of a retracted stroke.
The relief should activate if you keep the lever in the down position.
Some tractors can cause the front to rise using down pressure on lift arms, based on bucket mount and depth, probably only a few inches.
If you raise the lift arms and curl the bucket down, then you can push the down lever and raise the wheels off the ground.
You can also put a rail road tie under the bucket and put the bucket on top and push the down lever and raise the front wheels.
It is not a good idea to use SA cyl in a DA valve setup and two hose operation.
Can you show pictures of the valve, and the cyl.
Usually in a SA cyl set up, one of the work ports is plugged, and a filter screen is in one of the cyl ports.
If your system is set up for DA operation, and
If your bucket is flat on the ground, and the cyl is fully retracted, and you push the down lever, you will not be able to lift anything. You are at the end of a retracted stroke.
The relief should activate if you keep the lever in the down position.
Some tractors can cause the front to rise using down pressure on lift arms, based on bucket mount and depth, probably only a few inches.
If you raise the lift arms and curl the bucket down, then you can push the down lever and raise the wheels off the ground.
You can also put a rail road tie under the bucket and put the bucket on top and push the down lever and raise the front wheels.
It is not a good idea to use SA cyl in a DA valve setup and two hose operation.
Can you show pictures of the valve, and the cyl.
wdchyd
Elite Member
JJ,
I'm sure he has a DA valve and cyl setup but the older fords have a strange way of putting in just one (directional) set of v-pkg.......it will go both ways but rarely do they hold pressure tight in the other way....Just something to consider.....lifting the tractor off the ground wouldn't prove or disprove anything......actually my 2010 kubota won't lift the front end up in some circumstances
I would use the pressure guages to confirm valve holding a load and PRV settings.....
If the control valve comes out to be the culprit then I would be suspicious of some contaminated hyd oil doing the damage to the control valve and wear in the cyls
I'm sure he has a DA valve and cyl setup but the older fords have a strange way of putting in just one (directional) set of v-pkg.......it will go both ways but rarely do they hold pressure tight in the other way....Just something to consider.....lifting the tractor off the ground wouldn't prove or disprove anything......actually my 2010 kubota won't lift the front end up in some circumstances
I would use the pressure guages to confirm valve holding a load and PRV settings.....
If the control valve comes out to be the culprit then I would be suspicious of some contaminated hyd oil doing the damage to the control valve and wear in the cyls
Good morning guys. Thanks for your responses. JJ Both the lift and bucket cylls are DA, I've tried turning bucket cutting edge down which gives me about a foot of travel left on the lift cylls , then trying to lift the front off the ground with the lift arms --- not enough down pressure, but i can lift front end by rolling bucket in dump direction when it is laid flat on the ground. The lack of pressure seems to in the lift cylls only. WDCHD, since the loader did'nt hold in place when machine was shut down , do you think the V-packing may be installed in the wrong direction or just worn out and letting fluid leak thru internally ? the lift cylls are not leaking externally. also I do intend to change the hyd fluid & clean or change the filter and suction screen. As this machine is new to me , I do'nt know where they are located. I,ll put a manual on the list of things to order.
wdchyd
Elite Member
If it were my machine, I'd repack those cyls anyways just cuz you don't know where they've been....a little extra work ain't gonna hurt them
I wouldn't suspect they were in wrong unless it shows they were done recently..( I've seen this)...more than likely just wear and tear
I wouldn't suspect they were in wrong unless it shows they were done recently..( I've seen this)...more than likely just wear and tear
jinman
Rest in Peace
- Joined
- Feb 23, 2001
- Messages
- 20,387
- Location
- Texas - Wise County - Sunset
- Tractor
- NHTC45D, NH LB75B, Ford Jubilee
Mick, I think a 5" drop in an hour is VERY GOOD for a tractor as old as yours. 16" overnight is better than some almost new tractors. My 2000 model TC45D drops more than that. In operation, that kind of leak does nothing to take away from the loader's power or workability. Most loads are on the loader for no more than a minute. Even if you transport a distance and the loader sags a tiny bit, just a touch of the joystick controls puts it back to normal. There is no way I'd suggest you try to "fix" that kind of leak. If you have power or lift problems and don't have sufficient pressure, then look to something else as the problem. It's not that tiny leak.
Your tractor doesn't have a regular spin-on filter or cartridge type filter. All it has is a screen. Follow the big line off the top of the hydraulic pump. Where it goes into the transmission case on the right hand side, there is a round cover under a banjo connector. Take the banjo connector loose and remove the round cover. It is attached to the screen. Be sure and drain your hydraulic fluid before removing the banjo fitting or cover. After cleaning the screen, you can add your fluid back. Here's a diagram of the screen (item 15). The screen is on the suction side of the pump.
