L35 not moving/hydraulics?

[RMBlauvelt]

I have a L35 with loader and backhoe. It has been sitting exposed for about 2 years.

I finally started it up again. It had a starter issue. It starts up quickly and the engine runs smoothly.

I put it in gear and moved it about 50 feet. Then is stopped moving. I changed the engine oil, flushed the radiator, changed the front axel oil, greased the joints, and still no improvement. The hydraulic fluid was changed a couple years ago and looked only slightly dirty but dipped full or just over full.

The steering wheel intermittently turns the wheel, but mostly is disengaged and free. The clutch pedal moves freely - but the manual clutch is not typically used for shifting. The PTO spins when engaged. The bucket and hoe hydraulics work but are weak and jittery.

I have jostled the shifter (on the steering column) a bunch of times and nothing had changed. Tried it over 2 days and no change.

I had the 46 hydraulic fluid in it and potentially this is the wrong stuff. So I swapped it out for kubota UDT fluid which cost a fortune. No change.

So it seems the hydraulic systems are not working. The steering, bucket/hoe, and clutch are all hydraulic.

Super appreciate next step on diagnostics before I get an expensive repair guy to take a look.

Thanks

Roger

 

[North Idaho Wolfman]

I will have to give you a better answer when I get home to check prints but it sounds like a suction or main pump issue.
Did you change filters when you changed fluid?

 

[RMBlauvelt]

good thought. I changed the oil filter just now. The larger hydraulic filter I changed a couple of years ago, but not recently. Perhaps worth a try? Thanks!

 

[L35]

Check the condition of parts 100(x2) and 200 on this schematic. They are on the suction side of the hydraulic system (right side of tractor) and if they are dry rotted they will suck air but not leak oil. I’ve had to replace mine already.

https://www.messicks.com/catalogs/kubota/l35/hydraulic-system/t09700-hydraulic-oil-line-inlet

 

[PoTreeBoy]

Check the condition of parts 100(x2) and 200 on this schematic. They are on the suction side of the hydraulic system (right side of tractor) and if they are dry rotted they will suck air but not leak oil. I’ve had to replace mine already.

https://www.messicks.com/catalogs/kubota/l35/hydraulic-system/t09700-hydraulic-oil-line-inlet

There are more of those hoses up around the cooler. The steering and cooler are on the engine mounted pump discharge, but the whole thing rides on the front pump suction line so some part of it may be under vacuum at times. In any case, I replaced all of mine, too.

OP, since you have implement and travel/steering issues, suction problem is indicated, since those are on separate pumps. Since you've replaced the filter and this machine doesn't have a screen, try disconnecting the hose that runs from the pump to the P port on the loader valve, stick it in a bucket, and start your tractor. If fluid starts running out, shut her down and reconnect the hose. If that doesn't prime it, pull a little vacuum on that hose to draw fluid into the pump. Or you can try pouring fluid into the top of the pump.