Testing And Adjusting Brake Pedal Linkage - Komatsu WA250-6 Shop Manual

SEN03837-01
Testing and adjusting brake pedal
linkage
Testing
1. Check for play in linkage mounting pin (7), pin-
hole of lever (6), and lever bushing.
2. Measure length of link (1), and check that it is
within the standard value.
Standard link length (a): 184 mm
a Measure the length from the center of pin
(5) to the center of ball joint (3).
3. Measure the distance of movement of rod (8)
and check that clearance (b) is within the stan-
dard value.
Standard clearance (b): 0 – 0.3 mm
a When doing this, check that the brake
pedal is in contact with the stopper.
Adjusting
Adjusting link length (a)
1. Remove pin (5) and ball joint (3), then remove
rod (1).
2. Loosen locknut (4), then turn yoke (2) and ball
joint (3) to adjust the length.
3. After adjusting the length of link (a), connect it
to the brake pedal.
a Standard value (a): 184 mm
Adjusting clearance (b)
1. Loosen locknut (7), turn rod (8) so that the tip
of the rod contacts the booster cylinder piston,
then turn rod (8) back 1/4 turn.
2. Tighten locknut (7).
a Standard value (b): 0 – 0.3 mm
18
30-120

Testing and adjusting brake pedal linkage

1
120 Testing and adjusting, Part 2
WA250, 250PZ-6