Landoll 345B Operator's Manual page 62

5-5 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.
SYMPTOM
SYSTEM INOPERATIVE
SYSTEM OPERATES ERRATIC-
ALLY
SYSTEM OPERATES SLOWLY
SYSTEM OPERATES TOO FAST
5-6
PROBLEM: REMEDY
Not enough oil in system: fill, check for leaks.
Wrong oil in system: change oil, see specifications.
Filter dirty or clogged: drain oil and replace filter.
Hydraulic lines dirty or collapsed: clean or replace as neces-
sary.
Air leaks in pump suction line: repair or replace as neces-
sary.
Worn or dirty pump: clean, repair or replace. Check for con-
taminated oil. Drain and flush.
Badly worn components: examine for internal leakage. Re-
place
faulty components. Check for cause of wear.
Leakage: check all components, and relief valve for proper set-
tings.
Excessive load: check unit specifications for load limits.
Slipping or broken pump drive: repair or replace couplings.
Check for alignment.
Air in the system: check suction side of system for leaks. Re-
pair 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.
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 dam-
aged lines.
Wrong size or incorrectly adjusted restrictor: replace or
adjust as necessary.
Engine running too fast: reduce engine speed.