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BRAKES (CONTINUED)
SYMPTOM
PROBLEM: REMEDY
SINGLE BRAKE DRAGGING
OR LOCKED
Broken internal brake component:
locate and replace broken
part.
Flat spot on cam roller or cam shaft:
replace and lubricate.
Improper adjustment:
adjust slack adjusters.
Spider bushing or cam bracket bushing binding:
lubricate or re-
place bushing.
Improper lubrication:
lubricate per
Figure 4-1.
Worn brake shoe bushing:
replace bushing.
Brake drum distortion:
replace drum.
Broken brake chamber spring:
replace spring.
Brake chamber pushrod binding:
re-align brake chamber bracket.
Air brake line loose or broken:
tighten or repair.
UNEVEN BRAKES
See “SINGLE BRAKE DRAGGING OR LOCKED”
Restriction in hose:
locate restriction and remove.
Worn brake linings:
reline brakes.
Grease on linings:
reline brakes.
Broken slack adjuster:
replace slack adjuster.
Call Factory or see qualified Trailer/Brake Technician.
Leaking brake chamber diaphragm:
replace diaphragm.
BRAKES APPLY TOO SLOWLY
Brakes need adjusting or lubrication:
adjust or lubricate as
needed.
Low air pressure in brake system (below 90 PSI):
check tractor
air system.
Restricted tubing or hose:
locate restriction and remove.
Defective relay valve:
clean or replace.
Call Factory or see qualified Trailer/Brake Technician
BRAKES RELEASE TOO SLOWLY
Brakes need adjusting or lubrication:
adjust or lubricate as
needed.
Brake rigging binding:
align brakes or replace bent parts.
Exhaust port of relay valve restricted or plugged:
clean or re-
place valve.
Air lines kinked:
Straighten air lines.
ALL BRAKES DO NOT RELEASE
Air system improperly connected to tractor:
tighten or
adjust connections.
Brake valve on tractor is applied:
release brake.
Relay emergency valve in emergency position:
check line
pressure and check valve.
Restricted tubing or line:
locate restriction and remove.
Defective tractor protection valve:
troubleshoot tractor air sys-
tem.
Parking brakes locked:
troubleshoot air system.
Moisture in air system:
Check air system
5-4
Содержание 330B
Страница 3: ...MODEL 330B SEMITRAILER OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO i ...
Страница 8: ......
Страница 12: ......
Страница 20: ...3 8 Figure 3 3 Steps for Loading and Unloading ...
Страница 26: ...3 14 Figure 3 7 Rear Impact Guard System ...
Страница 34: ...4 6 Figure 4 2 330B Wiring Diagram ...
Страница 35: ...4 7 Figure 4 3 Remote Wiring Diagram ...
Страница 40: ...4 12 Figure 4 6 Examples of Camber Figure 4 7 Checking Axle for Bend ...
Страница 44: ...4 16 Figure 4 11 Axle and Brake Assembly ...
Страница 54: ......
Страница 63: ...NOTES 5 9 ...
Страница 64: ......