mxm 120 hydraulics

[tractormiallis]

I bought a new to me mxm 120, thats case ih, from a dealer. The dealer changed all the fluids, filters and everything looked good upon purchase. However, the hydraulics work way way too slow. Acts like its low on fluid. It wont hardly raise my 7 shank chisel up to traveling height. Something is wrong. It looks to be up to the norm on fluid level, although might be low, I really am stumped. Could it be a bad pump?

 

[Janicholson]

If a recent purchase, the dealer needs to be informed and to look at it (for free in my opinion) there would be an implied warranty that it would be operational (or noted on the sale papers and signed off as accepted as is). Jim

 

[moresmoke]

Manual valves or electronic? Sounds like the flow control is turned down.

 

[tractormiallis]

Just to note- it only has 2600 hours on it

 

[RodinNS]

What does it do when you deadhead another valve? It sounds like a load sense problem and it's not stroking the pump.... although if it has power and is just slow... could be a flow control turned way down.

Rod

 

[IaGary]

The large frame MX series have knob adjusted flow speed controls. Does the MXM series?

Gary

 

[Tx Jim]

I also think the dealer should be contacted. Next thing I'd recommend is checking pressure with a gauge.

 

[greygoat]

Hope someone else didn't trade it off due to
that problem.

 

[Adirondack case guy]

There are flow control knobes down on each spool to control cyl/motor speed. Locate them and open them up for more flow. If you don't have a Ops manual, get one and familiarize yourself with the tractor. Also make sure you paired the cylinder hoses propperly with the spool and don't have the hoses hooked across two spools.
Loren, the Acg.

 

[Anonymous-0]

I do have a Original Operator manual for sale for the MXM 120. my e mail [email protected]

 

[tractormiallis]

Ok, so update- The flow control valves on the back of the tractor by the remotes are open. Upon using it today, it will slowly lift the chisel up to transport when the tractor is COLD. But once it is warmed up it seems the fluid might be getting hot, because then it wont lift it up to transport at all. All fluids and filters supposedly were changed too, by dealer. I contacted the dealer today but await a response from owner.

 

[RodinNS]

What does it do when you deadhead a second remote or raise the three point hitch simultaneously?

 

[tractormiallis]

The three point will raise, but doesnt really do much to hit the other remote lever. The detent on the levers is not working either, meaning when the implement raises all the way up it should pop back into the detent spot. According to the manual i have, the first lever should operate the right hand side remotes top and bottom,the other lever operates the left side remotes top and bottom. But mine is reversed opposite as to the manual, so i wonder if someone messed with the hydraulic setup before.

 

[RodinNS]

Does the 3-point operate at normal speed? Does it have power to lift?
Need to narrow down wether the problem is isolated to one or two remotes or the entire system. If it effects everything... then it's probably a stroke control or load sensing issue with the pump. If it's only affecting the remotes... then it's more likely related to the flow control in the remote or very directly related to how it senses load.

Rod

 

[tractormiallis]

The 3pt seems to operate effectively, but I havent put a load on it. It could be flow control valves are not working or a load sensing issue as well.

 

[RodinNS]

If the three point operates normally and lifts a good load at normal rate of speed then I would say the pump and stroke control of the pump are fine. I would wager that the problem is in the remote valve flow control or it's load sense function. Again... I'm kinda assuming that it has a piston pump and CCLS remotes... but that's fairly standard on tractors that size now.

Rod

 

[tractormiallis]

It has Faster brand remotes on it, dont know what it originally came with, assuming those arent originals. Could it be a problem with the remotes mating with the pioneer couplers not allowing enough flow, or is that not possible? Just trying to think of all options. Talked to a dealer and he said its unlikely at 2600 hours that it would be the pump, but could be something caught somewhere restricing the pump. Hopefully I can find someone to do some diagnosing on it. Thanks for your replies.

 

[RodinNS]

It could be a coupler issue... I'm not familiar with the ones you have... but I have had male tips before that do not interface with the Rexroth/ISO style coupler. The needle point tips that are supposed to couple under pressure are the worst...

Rod

 

[tractormiallis]

I am wondering that also, if the ball tips on my pioneer ends dont interface well with the needle pointed cone shaped button in the female coupler. Perhaps flow is restricted. Wondering if I should try replacing the feeder outlet to a pioneer one and see.

 

[RodinNS]

It's quick and easy to check... The ones I had a problem with were the real small needle points where the needle would bleed the pressure before the larger part of the ball contacted the mating coupler. The problem was... the coupler kit on had on the tractor had hollow centers and the needle tip fit right inside of it. I only figured it out because one of the other couplers on the tractor was original and had a solid center. Needless to say... I rounded up ALL of the needle point male tips and deposited them in the scrap bucket. I spent nearly a day trying to figure out what in hell was going on with that at the time and it was only by chance that I did figure it out.

Rod