Landoll 855E HD Series, Operator'S Manual

Page: 42 / 62

4-16 F-916-0217 Edition
MAINTENANCE AND LUBRICATION
Removal
1. Chock all tractor and trailer wheels and drain the air
system.
2. Mark the brake chamber for proper air line port
alignment for reassembly.
3. CAGE THE POWER SPRING following the steps
outlined in
“Caging the Power Spring” on
page 4-15.
4. Disconnect the slack adjuster from the connecting
rod by removing the clevis pin (See Figure 4-12.)
5. Mark all air service lines for proper reinstallation and
disconnect from the brake chamber.
6. Remove the brake chamber from the axle brackets.
Installation
1. CAGE THE POWER SPRING following the steps
outlined in “Caging the Power Spring” on
page 4-15.
2. Position the inlet ports by loosening the service
chamber clamp bands and rotating center housing
such that ports are located according to alignment
marks made during disassembly, then retighten the
clamp bands.
3. Position the breather hole in the downward facing
position by loosening the clamp bands on the spring
brake chamber and rotating the chamber housing
until the breather hold faces downward. Retighten
the clamp bands.
4. Remount the brake chamber on the axle brackets
and reconnect the air service hoses and the slack
adjuster connecting rod
(See Figure 4-12.)
IMPORTANT
Be sure the service line is on the service chamber
port and the emergency line is on the spring brake
port.
5. Check for leakage by charging the air system to a
minimum of 90 psi and applying soap suds to the
brake chamber and connections. If a growing bubble
is detected or bubbles are blown away, locate the
source of the leak and repair.
6. Insure that the clamp band is properly seated and
tight
before
uncaging the power spring.
Emergency Relay Valve
Maintenance
Every 3600 operating hours, 100,000 miles, or yearly, the
Emergency Relay Valve should be disassembled,
cleaned, and lubricated by a trained technician.
WARNING
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 showing 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 4-10.)
Lubricate brake assembly per
Figures 4-1
and 4-2, and Table 4-2.
Figure 4-10: Brake Lining Wear
WARNING
Repair or replacement of the relay/emergency
valve is a complex operation and should be
performed by trained service personnel. Contact
a Landoll authorized service center or the Landoll
factory for servicing.
DO NOT allow grease to contact brake linings as
this could result in reduced braking performance.
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