GENERAL
MAINTENANCE
GENERAL
Establish and adhere to a definite schedule of
maintenance inspection and servicing, application
and environment being the governing factors in
determining such a schedule. If your set is a prime
power application, base your schedule on operating
hours.
Use the running time meter to log hours run;
maintain an accurate record of hours and service for
vyarranty support
A set on stand-by duty will need servicing at times
other than those recommended by Onan and the
engine manufacturer. Referto Allis-Chalmers manual
for engine services and maintenance procedures.
Adjust your schedule to satisfy the following
conditions—
OPERATOR
MAINTENANCE
SCHEDULE
MAINTENANCE ITEMS
OPERATIONAL HOURS
MAINTENANCE ITEMS
8
50 100 200-250
Inspect Set
x«
Check Fuel
X
Check Radiator Coolant Level
X
Check Oil Level
X
Drain Fuel Filter Sediment
X
Check Air Cleaner
(Replace if Required)
xl
Clean Injector Pump Linkage
xl
Check Batteries
x4
Clean and Inspect
Crankcase Breather
X
Inspect Fan Belt
x2
Check Cooling System
x3
Change Crankcase Oil
x1,7
Replace Oil Filter Element
x1,7
Check all Hardware, Fittings,
Clamps, Fasteners, etc.
x6
Clean and Inspect Battery
Charging Alternator
X
Check Starter
X
Check Injection Nozzles
x5
Replace Fuel Filter Elements
x1
xl Or every 3 months. Perform more often in extremely dusty
conditions.
x2 Or every 3 months. Adjust to 1/2 inch depression between
pulleys.
x3 Or every 3 months. Check for rust or scale formation. Flush if
necessary.
x4 Or every 2 weeks.
x5 Check for proper spray pattern,-etc. Refer to the Allis-Chalmers
manual.
x6 Or every 3 months.
x7 Perform every 3 months or 100 hours, whichever comes first.
x8 Give unit general inspection. Then with generator set running,
visually and audibly check the exhaust system for leaks.
NOTE:
The above schedule is a minimum requirement for your
engine. Refer to Allis-Chalmers service manual for recommend-
ed service periods.
• Continuous duty (prime power)
• Standby power
• Extremes in ambient temperature
• Exposure to elements
• Exposure to salt water or sea water
• Exposure to dust, sand, etc.
Consult with your ONAN distributor or dealer for a
schedule of maintenance and service more suitable to
the unique environment and application of your set.
WARNING
Before commencing any maintenance work
on the engine, generator, control panel,
automatic transfer switch or associated wiring, disconnect
batteries. Failure to do so could result in damage to the unit or
serious personal Injury In the event of Inadvertent starting.
AC
GENERATOR
There are no brushes, brush springs orcollector rings
on these generators, therefore they require very little
servicing.
Periodic inspections, to coincide with
engine oil changes, will ensure good performance.
Generator Bearing: Inspect the bearing every 1000
hours with the unit running.
If using the unit for "prime power," replace the
bearing every 10,000 hours or two years. If using the
set for "standby," replace the bearing every five years.
Check generator voltage. It may be necessary to
make a slight readjustment of the voltage rheostat to
obtain the preferred voltage at average
load.
INSPECTION
AND
CLEANING
When inspecting the rotating rectifier assembly,
make sure diodes are free of dust, dirt and grease.
Excessive foreign matter on these diodes and heat
sinks will cause the diodes to overheat and will result
in their failure. Blow out the assembly periodically,
with filtered, low pressure air. Also check to see that
diodes and leadwires are properly torqued. The
diodes should be torqued to 30 in. Ib. or finger tight
plus a quarter
turn.
Blow dust out of control panel.
BATTERIES
Check the condition of the starting batteries at least
every two weeks. See that connections are clean and
tight. A light coating of non-conductive grease will
retard corrosion at terminals. Keep electrolyte at the
proper level above the plates by adding distilled
water. Check specific gravity, recharge if below
1.280.
27
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