Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

[Ken1945]

Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

"Hay"... make it when the sun shines!

I have a weird one. My 253 turbo charged massey was having a little lift problem... it would not lift at all. I drained the water and hydraulic fluid out of the case, washed the case out good with clean diesel fuel, changed the filter and refilled the case to the mark with new hydraulic fluid designed for this system. It has worked fine the few times I have used since last summer. Yesterday I wanted to do some edging with the box blade and everything worked great for about 30 minutes. Then it started lowering the lift by itself every time I increased engine RPM's. Then to get it to lift again I had to shut the engine off. After restart it would lift slowly but as soon as I increased the Revs it would lower again. It is doing this with the lift control in the up position without me touching the lift control. This is the three-point hitch I'm referring to.

Has anyone seen this type of issue on any tractor?

I sure could use some direction tracking down this problem. Thanks, Ken

 

[Ken1945]

Re: Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

I have been looking at the service manual and the only thing i can see that might be the problem is the pressure relief valve. The lift working perfect until everything has time to warm up. Any ideas would be appreciated greatly. Thanks Ken

 

[DMW]

Re: Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

Double check your fluid level. If the pump starts sucking air it will do what you describe to the lift cylinders. See it work a lot, on forklifts with low oil levels.

 

[JerryG]

Re: Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

Check the fluid filter in the transmission housing.

 

[Ken1945]

Re: Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

DMW AND JerryG, I appreciate the tips. A bit of info I may have neglected to put in my writeup. My tractor has 10 hours since a complete system washout, new internal tranny filter, I didn't clean the old one, and new fluid.

I used 5 gallons of new clean nr1 diesel and idled around the lot for several minutes and then did a 24 hr drain and drip. There was very little debris in drained fluid. My problem began with a cracked boot on the range and gear shift levers, got water in the fluid.

I will go and check both items you suggested and report back. Thanks again, Ken

 

[Ken1945]

Re: Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

DMW and JerryG, I checked the oil level in the transmission which also supplies the hydraulic lift. It was a little low but still between the marks on the stick. I referred to my notes of when I changed the transmission fluid and filter. I noted that it seemed to be on the full mark with 11 gallons. I have since gotten the service manual and it says one of these models uses 12.5 gallons and the other uses 13.5 gallons. I now have 13.5 gallons of tranny oil in there and the lift has the same symptoms. Is there an air purge valve for that pump or do you purge it by raising it up and lowering it?

If there isn't some type of air purge or prime procedure... I guess I'll have to open that bottom again, drain it and see if the new filter is already clogged. I washed the gear case out real good with 5 gallons of new clean diesel last time.

When I changed the filter, I noticed the new style filter is not as large as the old style. Now I wonder if the new style filter could be the problem since the filter mesh did not go all the way to the bottom of the filter tube.

Any guidance and tips would be appreciated. Thanks, ken

 

[DLTTrekkers]

Re: Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

You have the filter upside down .....no oil can go into the pump ?

 

[Ken1945]

Re: Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

DLTTrekkers, I'm going to drain it late this evening and drop the bottom plate and filter in the morning. I'm hoping it is something that simple. I sure don't want to have to pull that pump out of there.

Thanks to all that have pointed me in directions to check. Even though I have the service manual with all the schematics this system is still a brain teaser for me.

Ken

 

[Gary Fowler]

Re: Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

It sure sounds like lack of oil getting to the pump. This could be from a stopped up filter, wrong filter, low oil level or even a hole in the suction line letting air get into the line and causing cavitation in the pump.

 

[Ken1945]

Re: Engine Idling "hydraulic lift works" increase engine speed "lift stops working"

Gary, I have it draining into a clean container now. It has only run about 10 hrs since the last tranny oil change. I thought I had installed the new modified style filter but I just found out that I cleaned the old filter and re-installed it. The service manual calls for 12.5 gal in one of the 253's and 13.5 gal in the other one. One has a space and the other doesn't. I started with 12.5 gal and it worked perfectly for about 8 hrs then started the symptoms I have described again. That's why I changed it in the beginning.

I now am beginning to think... 1. I didn't get that mesh filter as clean as I thought or 2. If I am remembering correctly... I didn't get that O ring at the top seated correctly..

Anyway, tomorrow morning it will be done dripping and I will install a new filter this time. I'm beginning to think this particular problem might be reason Massey Ferguson modified the old style filter, which was a full length, to this new stem type. The new type puts the mesh further into the transmission sump. I have attached a photo of the new style filter.

I appreciate all the guidance I can get and I will post what a find and whether or not it is the solution to this problem tomorrow.

Ken