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TP-7092 2/21 61Section 4 Scheduled Maintenance
4.1.2 Service Schedule, 20 kW Models
System Component or Procedure
See
Section
Procedure
Frequency
Visually
Inspect
Check Change Clean Test
Fuel
Flexible lines and connections X R Quarterly
Main tank supply level X Weekly
Fuel piping X Yearly
Lubrication
4.2
Oil level X Every 8 hours of
engine operation
Change oil X Yearly or 150 hours
Replace filter X Yearly or 150 hours
Crankcase breather hose X Yearly or 500 hours
Oil cooler X X Yearly or 150 hours
Cooling
4.5
Air ducts, louvers X X Yearly
Exhaust System
4.6
Leakage X X Weekly
Insulation, fire hazards X Yearly
Obstructions or combustible materials near
exhaust outlet
X
Weekly
DC Electrical System
4.7
Check battery charger operation, charge rate X Monthly
Remove corrosion, clean and dry battery and rack X X Yearly
Clean and tighten battery terminals and inspect
boots
X X
Yearly
Battery electrolyte level and specific gravity * X Yearly
AC Electrical System
Tighten control and power wiring connections X Yearly
Remote control system, if equipped X Monthly
Visible wear or damage X Quarterly
Wire abrasions where subject to motion X X Six Months
Wire-cable insulation condition X 3 Years or 500 hours
Engine and Mounting
Visible wear or damage X Weekly
Air cleaner service
4.4 150 300
Yearly or hours
shown
Spark plugs 4.3 150 300
Replace stepper motor coupling and bushing D 500 hours
Generator
Visible wear or damage X Quarterly
Exercise generator set W Weekly
Brushes and collector ring D D Yearly or 300 hours
Measure and record resistance readings of
windings with insulation tester (Megger, with
SCR assembly or rectifier and load leads
disconnected)
D 3 Years
General Condition of Equipment
Evidence of vibration, leakage, deterioration,
unusual or excessive noise or temperature
X X X Weekly
Interior of sound enclosure X X Quarterly
* Not necessary for maintenance-free batteries.
Service more frequently under extremely dusty/dirty conditions.
Megger is a registered trademark of Biddle Instruments.
X Action
D Authorized distributor/dealer
only
R Replace as necessary
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