unbolt the flex plate from the flywheel and see if the engine revs up, sounds like a torgue converter going bad. If that doesnt make a difference can you check to see if the hydraulic control valve is overheating too. It or the pump may have a relief valve stuck open and constantly dumping fluid over relief will make oil over heat quickly.
Swoop, if you ever get opportunity to jump, try it, you'll never be the same.
(JUST FOR YOUR INFO, SWOOP REFERS WHEN A JUMPER UNDER CANAPY FLIES IN AT 90 mph AND SKIDS THE GROUND AT 1 ", OR FREEFALLING INTO A FORMATION THATS BUILDING AT A HIGH RATE OF SPEED AND SLOWING DOWN QUICKLY TO GET IN)
There are 2 decent drop zones in NC, one near Raleigh and one near Charlette. Also there is a wind tunnel near Raleigh, if you lack the intestinal fortitude for a skydive, but if you can, do it. My addiction has drawn me to the DZ every weekend for the last 10 years.
Harold, can you remove the pump and run the truck?
7777,
nope dont skydive but always wanted to try it
i picked this name up after watching that movie "dropzone" with wesley snipes in it. The crazy guy that was on thier jump team they called swoop. ;o)
anyways,
harold
if you have removed the pressure line and checked flow and with no restriction on the pump the engine still will not rev up i have a couple questions
1- was the engine laboring during this test like it was trying to rev but something was holding it back?
2- are there any codes or warning lights on the dash lighting up or showing error codes?
you may have more than one issue here but the fact that the pump is heating up and it is mounted on the transmission makes me wonder if there is something in the transmission causing this problem and its translating out to the pump and throwing you off.
you may wind up going into the transmission from the sounds of it
Worn parts or bad bearing in the pump?
Hey swoop, do you jump, are you a skydiver? Thats a comman term we use (swoop) in the sport.
In addition I have removed pressure line from hyd. pump to control valve, put hose in clean bucket, oil flows freely, but engine still will not rev.
The other section of the pump which connects to the brake valve?? , I have not done anything with.
There also seems to be a reliefe valve built into the hyd. pump.
Again I awaiting a diagram from the dealer.
Pump is mounted on trans. The pump has two sections, one section supplies oil to the control valve, and the other section supplies oil to the hyd. brakes. I am awaiting a hose diagram from local dealer.
Engine will not rev and oil gets to hot to touch within 15 mins.
where is this pump mounted at?
on the engine or transmission?
or in the counterweight, with pilotshaft driving it off the engine front pulley? if in counterweight how close is the muffler to it?
I'm not familiar with your particular machine, but I've never had a pump go bad where the symptom was heat. I've always found heat to be a symptom of a restriction to flow.
I'd make a hose up to go from the hyd pump directly to the hyd tank fill & just let the unit run. If the pump still got hot then maybe it is bad- there's always a first.