Vehicle Systems
Testing and Adjusting
58
Brake System
Brake System Air Removal
Systems With Remote Reservoir
Remote Reservoir Location
(1) Remote reservoir.
When the brake pedal resistance is spongy (not
solid) it is usually an indication that there is air in the
brake hydraulic system. The cause may be low fluid
or oil level, leakage in the system, a broken brake
line or a brake line that is not connected.
To remove air from the brake system, do the
procedure that follows :
1.
Fill remote reservoir (1) with the correct brake
fluid to 12.7 mm (.50 in) from the filler cap. See
the Operation and Maintenance Manual for the
correct brake fluid.
2.
Put pressure on the brake pedal and open bleed
screw to let air out of the system. Close bleed
screw while pressure is still on the brake pedal ;
then let the pedal return to the original position.
3.
Do Step 2 again as many times as necessary
until the brake fluid is free of air.
4.
Use the procedure in Steps 2 and 3 again,
except this time use the right bleed screw.
5.
Fill remote reservoir (1) again, with the correct
fluid, to the level explained in Step 1.
Pedal Adjustment for Brake & Inching
The adjusting procedure is as follows. Be sure that the
air bleeding of brake system should be done in
advance.
1.
Adjust the length (A) from the spool to the
connection point of yoke. (A) should be 80 ± 1mm
for D(G)15S-5 or 83 ± 1mm for GC15S-5. Be sure
that 1mm of gap between the piston and the rod
should exist. In case of no gap, it would result in
brake drag or overheating of axle oil. In case of too
loose, the performance of service brake become
lowered.
2.
Adjust the length (B) of rod by fixing the nuts at both
ends. (B) should be 143 ± 1mm for D(G)15S-5 or
183±1mm for GC15S-5.
