Question about Cars & Trucks
Trying to bleed the brakes on a toyota hilux 3l tubro desiel and the pedal will become hard while car is of and as soon as you start engine the pedal fads to the floor the booster it not leaking air and the vaccum pump is sucking at the correct pressure we have changed the master cylinder to new one and swapped with another car and problem presists. also we have changed all brakes around car.
Brake Pedal will be hard with engine off & a couple pumps
of the pedal,will bleed off vacuum,that is normal
System not properly Bleed or Master Cylinder is leaking
Posted on Jan 08, 2013
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Posted on Jan 02, 2017
if the booster is bad the pedal would be hard sounds like the e-brake is stuck take off the drums and make sure the arms are all the way back then did you adjust the rear brakes after changing the shoes
Posted on Dec 14, 2008
i try to help you, firts refill brake fluid container,open purge valve in one wheel front only,wait few minutes when drops fluid, close this valve and open other wheel, same procedure, finally repeat this in each 4 wheels
Posted on Jul 14, 2009
SOURCE: I have replaced the Master
Your brakes are vacuum aided so when engine is off the pedal will be hard. When the engine runs the vacuum is active and the pedal becomes light. Your brakes are working but need adjustment so that the pedal does not go to the floor.
Locate the adjusting screws behind the rear wheel drums.
With one wheel jacked adjust the shoes till wheel wont turn.
Then loosen until wheel is just free of any friction from shoes.
Repeat for other side.
Posted on Sep 20, 2011
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