Landoll 330C, Руководство оператора

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MAINTENANCE AND LUBRICATION
4-17
Spring Air Brake Chamber
Repair or replace faulty units. Check the condensation
holes on the underside of the brake chambers to make
sure they are open. The spring brake has two brake
chambers, a service chamber and an emergency
chamber or spring chamber. Service brake chambers
should be disassembled and cleaned at 50,000 miles or
yearly. The diaphragm and any marginal parts should be
replaced. The spring chamber should not be serviced.
Replace entire unit if spring chamber becomes faulty.
When replacing the service diaphragm, replace the
corresponding parts for the other chamber on the same
axle (to aid in even brake application and release).
Examine yoke pin for wear and replace as necessary.

WARNING
Caging the Power Spring
1. Chock the semitrailer wheels.
2. Remove dust cap from spring brake chamber.
3. Remove the release bolt from it’s holding brackets
and insert it into the spring brake chamber. DO NOT
USE AN IMPACT WRENCH TO CAGE THE SPRING
BRAKE!
4. Turn the bolt until the spring brake is caged. This
should be 2-1/4 to 2-1/2 inches of release bolt
extension.
5. The brakes should now be released. Do not operate
loaded semitrailer with brake manually released.
6. To reset the spring brake, turn the release bolt until
the spring is released. Remove the release bolt and
store it in its brackets.
7. Snap the dust cap back in place on the chamber.
Removal
1. Chock all tractor and semitrailer 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 4-17.
4. Disconnect the slack adjuster from the connecting
rod by removing the clevis pin
(See Figure 4-9.)
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 4-17.
2. Position the inlet ports by loosening the service
chamber clamp bands and rotating the center
housing so the ports align with marks made during
disassembly. Then retighten the clamp bands.
3. Loosen the clamp bands on the spring brake
chamber and rotate the chamber housing until the
breather hole 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 4-11.)
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.
Tandem Relay Valve Maintenance
Every 3600 operating hours, 100,000 miles, or yearly, the
Relay Emergency Valve should be disassembled,
cleaned, and lubricated by a trained technician.

WARNING
The spring brake chamber employs a spring with
high forces. Service should not be attempted.
Serious injury or death may result.
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 for servicing.