WARNING
THE SPRING BRAKE CHAMBER EM-
PLOYS A SPRING WITH HIGH FORCES.
SERVICE SHOULD NOT BE AT-
TEMPTED. SERIOUS INJURY OR
DEATH MAY RESULT.
4-9.3
Replacing the Spring Air Brake Unit
a. Caging the Power Spring in the Spring
Chamber
1.
Chock the semitrailer wheels.
2.
Remove dust cap from the rear of the spring
brake chamber
(See Figure 4-12)
.
3.
Remove the release bolt from it’s holding
brackets. Insert it into the spring brake
chamber until it can be rotated and hooked
into place.
DO NOT USE AN IMPACT
WRENCH TO CAGE THE SPRING
BRAKE!
4.
Turn the nut on the release 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 brakes
manually released.
b. Uncaging the Power Spring in the Spring
Chamber
1.
Insure the semitrailer wheels are chocked.
2.
Turn the nut on the release bolt until the
spring is released. Remove the release bolt
and store it in its brackets.
3.
Snap the dust cap back in place on the
chamber.
c. Removal of Brake Unit
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
Section 4-9.3a.
4.
Disconnect the slack adjuster from the
connecting rod by removing the clevis pin
(See Figure 4-13).
5.
Mark all air service lines for proper
re-installation and disconnect from the brake
chamber.
6.
Remove the brake chamber from the axle
brackets.
d. Installation of Brake Unit
1. CAGE THE POWER SPRING f
ollowing
the steps outlined
in Section 4-9.3a.
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
re-tighten the clamp bands.
3.
Remount the brake unit on the axle
brackets and reconnect the air service
hoses and the slack adjuster connecting
rod
(See Figure 4-13).
IMPORTANT
BE SURE THE SERVICE LINE IS ON THE SERV-
ICE CHAMBER PORT AND THE EMERGENCY
LINE IS ON THE SPRING BRAKE PORT.
e.
Check for leakage by charging the air sys-
tem to a minimum of 90 psi and applying
soap suds to the brake chamber and connec-
tions. If a growing bubble is detected or bub-
bles are blown away, locate the source of the
leak and repair.
f.
Insure that the clamp band is properly
seated and tight
before
uncaging the power
spring.
g.
Uncage the power spring according to
Sec-
tion 4-9.3b.
4-9.4
Tandem Relay Valve Maintenance
Every 3600 operating hours, 100,000 miles, or
yearly, the Relay Emergency Valve should be dis-
assembled, cleaned, and lubricated by a trained
technician.
WARNING
REPAIR OR REPLACEMENT OF THE
RELAY/EMERGENCY VALVE IS A COM-
PLEX OPERATION AND SHOULD BE
PERFORMED BY TRAINED SERVICE
PERSONNEL. CONTACT A LANDOLL
AUTHORIZED SERVICE CENTER FOR
SERVICING.
4-14
Содержание 336C
Страница 3: ...MODEL 336C CAR CARRIER OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO...
Страница 8: ......
Страница 24: ...3 12 Figure 3 7 Lining Up the Over the Cab Deck Figure 3 8 Loading the Over the Cab Deck...
Страница 28: ...3 16 Figure 3 11 Loading the Lower Deck...
Страница 32: ...3 20 Figure 3 13 Rear Impact Guard and Antilock Brake System...
Страница 40: ...4 6 Figure 4 3 336C Wiring Diagram...
Страница 45: ...4 11 Figure 4 7 Checking Axle for Bend Figure 4 8 Examples of Camber...
Страница 50: ...4 16 Figure 4 12 Axle and Brake Assembly...
Страница 54: ...4 20 Figure 4 14 Outboard Mount Hub and Drum Figure 4 15 Inboard Mount Hub and Drum...
Страница 59: ...4 25 Figure 4 19 Mounting Tires and Wheels Figure 4 20 Stud Tightening Sequence...
Страница 70: ...NOTES 5 10...
