Landoll 345D, Руководство оператора, Страница: 57 / 64

TROUBLESHOOTING
5-3
Brakes
For maintenance procedures, see “Brake System
Maintenance” on page 4-13.
AIR RIDE HEIGHT PROBLEMS:
TOO HIGH Axle to control valve linkage Readjust linkage
Height control valve internal leak Repair or replace valve
TOO LOW Axle to control valve linkage Readjust linkage
Height control valve filter plugged Clean or replace valve
Pressure protection valve filter plugged Clean or replace valve
System air pressure low (65 PSI minimum
required) troubleshoot air supply
UNEVEN FROM SIDE TO SIDE Linkage adjustment Readjust linkage
Exhaust port plugged Clean or replace valve(s)
Height control valve internal leak Repair or replace valve
Supply line to one height control valve
pinched, restricted, or plugged Repair or replace line
PROBLEM PROBABLE CAUSE SOLUTION
PROBLEM PROBABLE CAUSE SOLUTION
NO BRAKES OR BRAKES ARE
INTERMITTENT Brake air system improperly connected Reconnect hand valve properly
Relay/Emergency valve plugged Clean valve
Defective tractor protection valve Repair or replace
Restricted tubing or hose line Locate and eliminate restriction
Broken line Locate break and repair
Tractor air system failure Troubleshoot tractor air system and repair
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 replace 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
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
105 PSI) Check tractor air system
Restricted tubing or hose Locate restriction and remove
Defective relay valve Clean or replace