Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 670 / 1164

BASIC BRAKE SYSTEM -
On-vehicle Service
35A-10
PROPORTIONING VALVE FUNCTION TEST
<SPACE RUNNER>
35100110257
1. Connect two pressure gauges at the input and output
side of the proportioning valve as shown.
Caution
The proportioning valves are installed independently
for the right and left brake lines. Always measure
each valve.
2. Bleed the brake line and the pressure gauge.
3. Depress the brake pedal gradually. Then check that the
split point, where the output fluid pressure begins to drop
in proportion to the output fluid pressure, is at the standard
value.
Standard value: 2.70 - 3.19 MPa
4. Depress the brake pedal more strongly than at the above
step. Then check that the output fluid pressure is at the
standard value when the input fluid pressure is 7.36 kPa.
Standard value: 3.68 - 3.92 MPa
5. Measure each output fluid pressure at both valves, and
check that the difference between the two is at the limit
value or less.
Limit: 0.39 MPa
6. If the measured pressure exceeds the limit, replace the
proportioning valve.
LOAD SENSING SPRING LENGTH CHECK
AND ADJUSTMENT <SPACE WAGON>
35100120038
1. Park the vehicle on a level ground. The vehicle should
be unloaded and supported only by wheels.
Caution
Never support the vehicle with jacks or other similar
means.
2. With the lever pressed all the way to the load sensing
proportioning valve side, check whether or not the length
(shown in the figure) of the spring (the length between
its ends) is the standard value.
Standard value (A): 198 - 202 mm
3. If the spring length is not within the standard value, loosen
the bolt attaching the support and adjust the distance
by moving the support.
Pressure gauge
Proportioning
valve (R.H.)
Proportioning
valve (L.H.)
Split point
Output
pressure
Input pressure
Load sensing spring
Spring support
Lever
A