hand thread for left-side brake and left-hand thread for right-side brake. In ton
trucks, right-hand thread for right-side brake, and left-hand thread for left-side brake.)
b) Adjuster spring direction. (Do not allow the adjuster gear teeth to contact with
the spring.)
c) Return spring direction of the push rod. (Spring hook at anchor pin side should
be located at the opposite side to push rod.)
d) Push rod and its return spring should be located in the groove on the anchor
pin.
e) Make sure that the adjusting lever lower end is in contact with the adjuster
gear teeth.
(10) Install the braking oil pipe on the operating cylinder.
(11) Measure the inner dia. of drum. Adjust the adjuster to obtain the difference
needed between the drum inner diameter and the friction piece outer diameter.
Specified difference: 0.8-0.9mm for 2 ton trucks; 0.5-0.8mm for ton trucks.
8.9 Operation Test to Clearance Self-adjuster
(1) Make the brake shoe diameter approach the specified mounting size, and pull
the adjusting lever with your finger along the arrow marks as shown in Fig.8-26 to
turn the adjuster gear. When removing off your finger, the adjusting lever should
return to its original position without rotation of the adjuster gear.
CAUTION: Even if the adjuster gear turn back along with the adjusting
lever motion when removing your finger, the adjuster will still operate normally
after it is built in the machine.
3-3.8
3-3.8
-67-
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