Re: 454 hyd. brakes

Posted by JB on September 03, 2003 at 17:55:51 from (24.157.142.242):

In Reply to: 454 hyd. brakes posted by Ray on September 03, 2003 at 12:49:18:

Hi, it is important to use only IH Hytran hydraulic oil. My brother learned the hard way. He purchased a used wood splitter at an auction sale, not thinking he attached it to his 454 and all the oil in the wood splitter mixed with the Hytran and started to foam. Then air bubbles in the brakes etc.
Hints on bleeding the brakes:
1) Transmission fluid must be warm.
2) Run engine at fast idle 1300 RPM.
3) Loosen both bleed screws and connect a clear plastic tube onto the bleed screws and put the other end into a clean contianer to catch the Hytran fluid.
Now my brother just lets the fluid flow until there are no more air bubles and closes the bleed screws. He does not pump brakes or pinch off the brake return line in front of the battery box.

The book tells you to pinch off the brake fluid return line and to pump the brakes.

As for the cause, it could be wrong hydraulic oil but most likely with a 454 it will be worn brake master cylinder or piston seals. Search this form for archive records for 454, 574, 684 they all have the same rear end just different engines.

Good luck
JB

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