Front end loader will not lift tires off the ground

[J_J]

Testing like you did, did not test the cyl to see if they were capable of developing pressure.

I think you did the pressure test all wrong. You only tested the pump.

If you have a good pump and deadhead the hyd, you are going to get good pressure.

Why not install the hyd gage in a tee at the IN port of the loader valve. This way, you can test the entire hyd system, except for the proper flow in GPM, and for that, you need a flow meter setup.

Then when you fully extend or retract the cyl, the cyl will try and develop the pressure and henceforth power/force.

I would like to see a video of your test.

 

[ruffdog]

Just wondering if the OP is trying to go down while curling. With my TC33, I push the bottom of the bucket flat to the ground, release the stick, THEN curl.

 

[jinman]

BoomerTC45, when you lay your bucket flat and curl down, do the loader lift arms rise instead of your front wheels coming off the ground? If so, you have an internal leak in a lift arm cylinder

 

[MikePA]

I just purchased a 2003 tc45d and when I bring the front end loader all the way down it will not lift the tires up. Is this Normal? Do I have a hydraulic problem? Can anyone shed some light on this? Btw the FEL is a 16la and also has a 930gh backhoe installed in rear.

Instead of trying to describe what you're doing, could you post a video?

 

[Boomertc45]

Hey thanks everyone for the feedback. I will try and get a video posted. Yes jinman with bucket flat when I go to curl down the loader lift arms do raise, however a few days ago I removed them and brought them to a hydraulic shop and had all seals replaced on both of them so that should rule out a internal leak right? J_J where would the IN port of the loader valve be located?

 

[jinman]

Yes, if your shop did a good repair, then the cylinders should be okay. This is really starting to sound like the load check valves in the dual joystick valve. New Holland has used several loader manufacturers, so it is hard to say what your valve's configuration is. I would think your hydraulic shop might be the best place to start for advice. Something is allowing your downpressure to bleed off.

 

[heviduty]

Boomertc45, you wouldn't happen to have a rack of suitcase weights on the front would you?

 

[J_J]

Hey thanks everyone for the feedback. I will try and get a video posted. Yes jinman with bucket flat when I go to curl down the loader lift arms do raise, however a few days ago I removed them and brought them to a hydraulic shop and had all seals replaced on both of them so that should rule out a internal leak right? J_J where would the IN port of the loader valve be located?

Most IN ports are marked with a P or IN.

The relief valve is usually located close by the IN port..

If you follow the pump OUT hose, it might go to the loader valve IN port or to a hyd block, and then go to the loader valve IN port.

You can leave that gage in place and monitor and troubleshoot the hyd system.

If your lift arms raise when you curl down, then the spools are leaking or the cyls are bypassing.

With the gage installed, what is the pressure on the curl cyl with the lever in full curl down?

Try this also. Put a cement block under the bucket and then use the lift lever, see it the lift arms will raise the wheels off the ground. Notice the pressure.

You did say you checked those load check valves.

A good hyd shop can test that valve for you. They can hook up and test any portion of that valve.

 

[J_J]

Do you happen to have a spare valve that you can connect only to the curl cyl and see if the hyd are good?

A remote valve work ports would work.

 

[George2615]

I am by no means a hydraulics expert. But is it possible he has some air in the cylinders / lines. He did say when he pushes down the lift arms go up instead of lifting the tractor. I think air in the cylinders would allow the arms to lift. Has he tried to cycle the loader to bleed any air. Just grasping at straws here.