Trans fliud gertting in the Hyd fluid - Technical Troubleshooting discussion in Forkliftaction's forums

Clark GPX30E:
Trans fliud gertting in the Hyd fluid

Please share some info if ya'll know about this.

Working on a Clark GPX25E GPX230E-0107-9233. Trans fluid is ending up in the Hyd fluid tank and causing it to over flow. My thoughts are the Hyd pump, trans fluid is by passing the shaft seal of the Hyd pump and into the Hyd fluid.

So I replaced the Suction hose from the tank to the pump to remove any obstructions. Also replaced fluids and filters.

Still happening.

My thoughts now are that the transmission pump is over pressurizing the Hyd pump mounting area somehow. Blockage in a port?

Has this happened to anyone. Please help if you have any info.

Posted 19 Apr 2014 04:42
Discussion started by mattdaddy
Texas, United States

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what about a transmission case vent?
some have them
if the vent gets clogged up it can allow the transmission to build up pressure which might explain why the fluid is getting pushed into the hydraulic system.

Generally by design seals are designed to keep fluid inside their contained systems not the other way around even though the dust lip on the seal may help prevent any dirt from entering in from the outside liquid tends to go where it wants to. So this in theory could be what is happening.

Have you ever pulled the dipstick out of the transmission and had it release pressure? Or have it keep blowing the dipstick out? Or if it has a capscrew plug with a filter element inside it release pressure when you removed it?

check for a transmission vent either on top of the case around the control valve area or on one of the axle tubes and even possibly inside the dipstick cap/****. I'm betting its on top of the trans case though.

Posted 20 Apr 2014 09:15
Reply by swoop223
North Carolina, United States

You've been swooped!
swoop223@gmail.com

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Not familiar with your exact unit but I would assume that the trans is losing fluid in direct proportion to hyd system gaining fluid?

Posted 20 Apr 2014 02:02
Reply by bbforks
Pennsylvania, United States

bbforks (at) Hotmail (dot) com
Customers love technology- until they have to pay to fix it!

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