Landoll 825B Series, Operator'S Manual

Page: 53 / 72

4-8.4 Brake Assembly Maintenance
The brake assemblies should be inspected and
adjusted every 2,000 miles or monthly. Examine
the brake linings visually to locate the lining show-
ing the greatest amount of wear. The wheel and
drum should be removed and the linings replaced
if the thinnest portion of the lining is 3/8 in. (9.5
mm) or less. Do not allow the linings to wear thin
enough that the lining rivet contacts the drum.
(See
Figure 4-12) . Lubricate brake assembly per Figure
4-1, Lubrication Points and Table 4-1, Mainte-
nance Schedule.
WARNING
DO NOT ALLOW GREASE TO CON-
T A C T B R A K E L I N I N G S A S T H I S
COULD RESULT IN REDUCED BRAK-
ING PERFORMANCE.
a. Brake Adjustment
This semitrailer is equipped with automatic
slack adjusters which compensate for brake lining
wear and keep brakes adjusted. Brakes should not
be adjusted manually except when relining brakes.
b. Disassembly for 16-1/2" x 7" Brakes (See
Figure 4-13).
1.
Release brakes and back off slack
adjuster.
2. Remove slack adjuster lock ring and slack
adjuster.
3. Remove drum assembly.
4. Disengage the roller retainers from the
rollers.
5. Press down on the bottom brake shoe and
remove the lower cam roller. Lift the top
shoe and take out the top cam roller.
6. Lift out the shoe retractor spring, which is
now free of tension.
7. Swing the lower shoe back approximately
180
o
to relieve the tension on the shoe
keeper springs. Remove the springs and
slip the shoes off the anchor pins.
8. Remove camshaft lock ring, spacer
washer(s) and camshaft.
9. After removing the shoes, completely
inspect all brake components, servicing as
necessary.
c. Reassembly for 16-1/2 x 7" Brakes (See
Figure 4-13).
1.
Install new anchor pin bushings, camshaft
bushing and camshaft seals into the spider.
IMPORTANT
WHEN INSTALLING CAMSHAFT SEALS, THE
SEAL ON THE SLACK ADJUSTER SIDE IS IN-
STALLED FACING INTO SPIDER. THIS AL-
LOWS GREASE TO PURGE OUTSIDE THE
BRAKE ASSEMBLY WHEN GREASING THE
CAMSHAFT BUSHING.
2. Install cam roller, retainer clip and retractor
spring retainers onto the camshaft.
3. Install 1/8" thick camshaft washer onto the
camshaft.
4. Install the camshaft into the spider. Install
spacer washer and lock ring retainer on
camshaft before sliding the camshaft
through the camshaft support bracket.
Install the slack adjuster, washer and lock
ring retainer.
4-19
Figure 4-12 Brake Lining Wear