Clark GTS 20 D, Operator'S Manual, Page: 98 / 128

7-10 Planned Maintenance Intervals
The maintenance time intervals referred to in this manual relate to
truck operating hours as recorded on the hourmeter, and are based
on experience CLARK has found to be convenient and suitable
under typical (normal or average) operating conditions. The periods
and their designations are:
PM Interval:
A=8 - 10 hours or daily
B=50 - 250 hours or every month (typical PM interval)
C=450 - 500 hours or every 6 months
D=900 - 1000 hours or every 12 months
E=2000 hours or every year
Check truck visually and inspect components.
Test drive truck/check functional performance.
Air clean truck and radiator.
Check torque on critical fasteners.
Lubricate truck. (See component)
Replace LPG engine oil and filter.
Replace Diesel engine oil and filter.
Clean and replace LPG engine air filter. (*)
Clean and replace Diesel engine air filter. (*)
Change Diesel fuel filter.
Change LPG fuel filter.
Inspect / adjust fan belts.
Drain / flush radiator coolant. (5000 hours)
Check engine ignition and timing.
Engine tune-up.
Check battery.
Check transmission fluid level.
Change transmission fluid.
Change transmission oil filter.
Clean drive axle air vent.
Check brake condition and wear.
Check drive axle mounting and fasteners.
Lubricate steer axle linkage.
Check / lubricate steer axle wheel bearings.
Change / replace hydraulic sump oil filter and breather. (**)
Change / replace hydraulic sump fluid and oil filter. (**)
Lubricate tilt cylinder rod ends.
Check lift chain adjustment and wear.
Check / lubricate lift chains.
Lubricate upright rollers. •
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