Landoll LT10A Series, Руководство оператора

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5-8 F-876-1217 Edition
TROUBLESHOOTING GUIDE
Hydraulic System
Most hydraulic system failures follow the same pattern: a
gradual or sudden loss of pressure or flow with a
resulting loss of cylinder or motor power. Any one of the
system’s components may be at fault. By following
step-by-step procedures, the trouble can be located in a
short time.
PROBLEM PROBABLE CAUSE SOLUTION
SEMITRAILER LOCKED IN TILTED
POSITION Dirty or damaged components Clean or repair as needed
SYSTEM INOPERATIVE Not enough oil in system Fill, Check for leaks
Wrong oil in system Change oil, see specifications
(See
Table 4-1)
Filter dirty or clogged Drain oil and replace filter
Hydraulic lines dirty or collapsed Clean or replace as necessary
Air leaks in pump suction line Repair or replace as necessary
Worn or dirty pump Clean, repair or replace
Check for contaminated oil
Drain and flush
Badly worn components Examine for internal leakage
Replace faulty components
Check for cause of wear
Leakage Check all components, and relief valve for
proper settings
Excessive load Check unit specifications for load limit
(See “Standard Specifications”
on page 2-1)
Slipping or broken pump drive Repair or replace couplings
Check for alignment
Valve Compensator stuck Clean, repair or replace
SYSTEM OPERATES ERRATICALLY Air in the system Check suction side of system for leaks
Repair leaks
Cold oil Allow ample warm-up time
Use proper weight oil for operating
temperature
Dirty or damaged components Clean or repair as needed
Restriction in filters or lines Clean and/or replace filter or lines
Not enough oil in system Fill and check for leaks
SYSTEM OPERATES SLOWLY Oil viscosity too high, or “cold oil” Allow oil to warm up before operating
Low pump drive speed Increase engine speed
(check pump owners manual for
specifications)
Low oil level Check reservoir and add oil as necessary
Air in system Check suction side for leaks
Repair leaks
Badly worn pump, valves, cylinders, etc. Repair or replace faulty component(s) as
necessary
Restrictions in lines or filter Clean and/or replace filter or lines
Improper adjustments Check orifices, relief valves, etc.
Adjust as necessary
Oil leaks Tighten fittings
Replace seals, gaskets and damaged
lines