Operating Test Automatic Clearance Regulator - Yale A7S1 Service Manual

Brake System
11. Connect the brake fluid line onto the wheel
cylinder.
12. Measure the inner diameter of the brake drum.
Adjust the differences between the inner diameter
of brake drum and the friction plate of brake shoe
to:
0.8-0.9 mm (0.031-0.035 in.) for 2-2.5T trucks.
•
0.5-0.8 mm (0.019-0.031 in.) for 3-3.5T trucks.
•
38
Operating Test Automatic Clearance
Regulator
1. Allow the diameter of brake shoes to approach
the installation size. Pull the adjusting lever to
rotate. When the adjusting lever is released, it
returns to its original place. The adjuster gear will
not rotate.
NOTE: Even when hand brake is released, the
adjuster will still function properly after being
assembled.
2. If the adjuster does not return to original position,
inspect these items.
a. Mount the adjusting lever, the top rod, the top
rod spring, and the washer cup.
b. Examine whether or not the position of the
adjusting lever and adjusting gear is correct
(see Figure 36.) Replace the parts if
necessary. Check if lever and gear are in
contact with each other.
8000 YRM 2199