any advice on how to check the valve assy
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I have a experience with intermittent failure of the brakes. When driving in cold environment the oil around brake disks gets so thick that it can not drain away from the brake piston (the piston that presses on the friction discs). It builds up a thick film of oil. After the machine has been idle for approximately 30 sec, you can press the pedal to the floor because now the oil has sunk down and the brake piston gets a longer stroke. When you have pumped the pedal one or two times the brakes seems to be ok until the next time With Cold enviroment in combination with ideling for 30 sec or more.
The soloution for this problem was new brake pistons with draining slots and a thinner oil.
problem was the brake valve,replaced it now we have good brakes
have a GC25e with wet disc and a. Brake valve not a master cylinder but the problem acts like a bad master , some times I hit the brakes and nothing hit them again and a good brakes. I am leaning to brake valve. Is it time to install some gauges
truck is heading to the shop for repairs.i will check for any service bulletins on this brake set up.i know the 3 wheel electrics had updated pistons.
On a pneumatic machine, we had a problem w/ hydraulic fluid filling the differential. I think the problem was the quad rings on the brake pistons? The problem would resolve for a while, then start filling again. Any thoughts?
There was brake mods to gas and diesel trucks which you replaced the brake piston.Sorry dont no the part no we had the parts sent by daewoo they also use a tractor oil in the axle.
sorry mate, wrong end of the stick. its the electric truck that has updated piston rods. B15T/5 that I worked on
Pneumatic G20E-3 CX-01702
Cushion GC25E-3 CV-02101 Have not done a brake job on the cushion yet. Same parts?
have you got truck model and serial number.
Alan, do have P/N's for the new updated ( I'm assuming they are quad rings) seals
headspinning. dont forget the updated brake piston with new seals fitted. the old one over stroked and allowed oil past the seal and into the final drive.
roc109
also check the discs and plates for signs of warping. warped discs will push the pistons back so on first press the pedal will touch the footplate, second press the truck will stop on the spot
7777 i sent you a picture of the valve located on the left side,below the air filter.under floorboard
i'm talking about the brake valve,located on the leftside of the truck,cust stated the pedal dropped to the floor as if it had a bad master cylinder.these trucks don't have a master cylinder.it seems that the problem is intermittent
I dont know that particular truck, we've performed brake jobs on IC trucks w/ wet brakes. If you shoot me several photos to my address, of the brake area, and under the floor board, I'll see if its similar.
Typically the friction discs ware and burn the plates. The plates and discs are replaced, along w/ the quad rings ect.
hi
mostly in the brake discs are damaged discs friction and steel
greets
krzysztof
I have an electric Daewoo (Doosan) in the workshop at the moment having the brakes overhauled due to loss of brake oil into the final drive housings, dont know much about the GP25 but if you think I can help just mail me,
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