Mitsubishi 3000GT 1991 Service Manual page 769

SERVICE BRAKES
Valve
Spring
Pressure
Pressure
Split point
output
pressure
Input pressure
2. Check the operation of the check valve by using a vacuum
Vacuum pump connection
Connection at the brake
booster side @
Connection at
the
manifold side @
Caution
If the check valve is defective, replace it as an assembly
unit together with the vacuum hose.
PROPORTIONING VALVE FUNCTION TEST
1. Connect two pressure gauges, one each to the input side
and output side of the proportioning valve, as shown.
2. Air bleed the brake line and the pressure gauge.
3. While gradually depressing the brake pedal, make the
following measurements and check to be sure that the
measured values are within the allowable range.
pressure (split point).
Standard value: 3.75 - 4.25 MPa (533 -- 604 psi)
(2) Output fluid pressure when input fluid pressure is 8.0
Standard value: 5.23 - 5.73 MPa (744 - 815 psi)
(3) C$txrt pressure difference between left and right brake
Limit: 0.4 MPa (57 psi)
4. If the measured pressures are not within the permissible
ranges, replace the proportioning valve.
TSB Revision
created and held.
intake
created.