I need advice for a '76 GMC 6000 series grain truck with a 350 engine. The brakes have recently started stiffening up when pressed after the truck is warm. When pressed the brakes have no play and I have to press really hard to get the truck to slow at all. The transmission fluid is fine and the bearings are still good. The truck has a tendency to overheat-but I keep a close eye on it and make sure that it isn't run too long. Any ideas? I would really appreciate some help. Thanks.
2006-08-30 16:35:03 · 5 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
If the truck has a Hydro-boost power brake system, it could be either the pump or the booster....../lean towards the booster....
If it's a vacuum booster system, it's a bad booster.
On the overheating, are the radiator fins clean?
Is there dust & debris in front of the radiator?
When was the last cooling system service?
Drop me an e-mail if you wish.
2006-08-30 16:41:16 · answer #1 · answered by mnm75932 3 · 2⤊ 0⤋
I would say the power brake booster is bad or theirs a vacuum leak
2006-08-30 20:32:12 · answer #2 · answered by daytripper19682000 1 · 0⤊ 0⤋
You didn't say but I assume your brakes are hydraulic, sounds to me like your brake fluid is low or your brake booster is bad.
2006-08-30 16:46:05 · answer #3 · answered by nbr660 6 · 0⤊ 0⤋
are the brakes air assisted or hydraulic? if they are air assisted you may have a broke hose or air pump that has gone bad. if hydraulic the power booster may be leaking
2006-08-30 16:54:43 · answer #4 · answered by taknadvantageof 2 · 1⤊ 0⤋
Sounds like the booster pump (hydroboost system) is going, or has gone out.
2006-08-30 17:23:49 · answer #5 · answered by Anonymous · 1⤊ 0⤋