Isuzu Tilt Slide FYJ2000 Instruction Manual page 385

SERVICE AND MAINTENANCE
6. Move the slack adjuster using a lever
to bring the lining into firm contact
with the drum. In this position, repeat
the measurement in Step 5 above.
The difference between these two
measurements is the free stroke.
7. Turn the adjusting bolt until the free
stroke is between 12.7 and 15.9 mm
(1/2 and 5/8 in).
8. Confirm the adjustment as follows:
Apply the brakes and hold the brake
pressure. At a pressure of 689 kPa
(7.0 kgf/cm²/100 psi), measure the
length from the center of the clevis pin
to the bottom of the air chamber once
again.
9. The difference between the
measurements of Step 5 and Step
8 is the chamber stroke adjustment
allowance. Turn the adjusting bolt to
make the adjustment stroke as small
as possible. Note, however, that care
should be taken to not reduce the
free stroke excessively and to keep
the lining from dragging. You should
ensure that the adjustment stroke
always conforms to the following
standards.
Air chamber (size)
Type 20 sq·in
Type 24 sq·in
Type 30 sq·in
10. Carefully apply the parking brake.
11. Before driving away, test the brakes
to ensure that the brake system is
operating correctly.
7-57
Adjustment chamber
stroke limit
44.4 mm (1 - 3/4 in)
44.4 mm (1 - 3/4 in)
50.8 mm (2 in)