Discussion:
1985 Cat V50D LP Transmission Slipping

I posted this last week in the specific section with no response. 1985 Cat V50D Serial number 3EC1100. It has the peugeot LP engine with auto trans. Fresh trans fluid and spin on filter. Converted to gas. Runs very well. Just purchased this truck and have been fixing it up. When you put it in reverse it drops the RPM's and engages pretty hard. When the position switch is put into the forward position the RPM's barely drop. It looks like it has a hydraulic inching pedal set up. I checked the pressure from the external hoses. Forward is 60 psi. Reverse is 120 psi. I do not have the two solenoids sticking out the front like others I have researched. The wires go in from the backside of the trans. It has two cover plates on top I'm guessing the solenoids are under there. I do not have a manual or a clue where to go from here. It will move forward barely if you rev the **** out of the motor.
  • Posted 4 Sep 2019 06:09
  • Discussion started by DirtyDingo
  • Arizona, United States
Showing items 1 - 3 of 3 results.
Wont let me put a link but if you google search -USED CAT-MITSU FORKLIFT T50D TRANSMISSION CONTROL VALVE (MISSING 2 SOLENOIDS) - CT9W2940
  • Posted 4 Sep 2019 13:14
  • Reply by DirtyDingo
  • Arizona, United States
https://absoluteliftparts.com/used-caterpillar-forklift-transmission-control-valve-9w2940/

I found this. Mine has nothing like this. I found the wires going into the trans. They have 12v forward and reverse. Only read 9v when hooked up. I jumped 12v to forward then reverse to see if it engaged any better. It does not. Calling a wrecking yard tomorrow looking for this newer style solenoid set up. Guessing it mounts on top towards the front.
  • Posted 4 Sep 2019 13:13
  • Reply by DirtyDingo
  • Arizona, United States
Most of those were converted to a top mounted control valve back in the 80's through a Cat update program, I have some advice, run!!! those transmissions were ****, those trucks were ****, its going to be good money spent on a very poorly made in Korea pile of dung.
You can try to locate the parts for the top mounted control valve from a junk yard, the parts were the same cushion or pneumatic, so if you can find a T50D in a junk yard the trans controls were the same. if you are truly interested email me ltrm812 at gmail dot com
  • Posted 4 Sep 2019 06:30
  • Reply by LTRM
  • Illinois, United States
ltrm812 at gmail dot com

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