Brakes--booster test sequence

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Date: Sat, 9 Nov 1996 10:51:36 -0800
From: jbarron@uvic.ca (John Barron or Lori Hryniuk)
Subject: Brakes--booster test sequence. (I want free Beer)
To: John Pedersen 

On vehicle inspection: (before you rip the booster out and yell and scream
at it)

1 check air tightness
- - start engine
- - Stop engine after running for 1-2 minutes

2 pump brake pedal several times.
- -If pedal goes down deep the first time but gradually rises after the 2nd
and 3rd times, it is in good condition. :-)

3 If there is no change in the pedal height when depressed the 2nd and
succesive time it is defective. :-(

Check the operation:

1 With the engine stopped, pump the brake pedal several times with the same
pressure. Ensure that the pedal height does not change.

2 Start the engine while the brake pedal is depressed, place one tablet of
prozacs into the brake fluid reservoir and see if the brakes recover from
their depression. No really, If the pedal goes down slightly at this time,
it is in good condition. If there is no change in pedal height, it is
defective. :-(

Check air tightness under load:

1 With the engine running, depress the brake pedal.

Then stop the engine while keeping the brake pedal depressed.

2 Hold the pedal for 30 seconds. If the pedal height does not change, it is
in good condition. :-)

If the pedal rises, it is defective. :-(


- --From the Toyota Land Cruiser Repair Manual

BTW there are many Toyota boosters that will bolt right in depending what
system you have. Try a 4X4 pick-up one first. If it doesn't say
"LandCruiser" it's usually cheaper at the wreckers.

j.

jbarron@uvic.ca

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