GENERAL
MAINTENANCE
GENERAL
Follow a regular schedule
of
inspection and ser-
vicing, based on operating hours (Table
1). Keep
an
accurate logbook
of
maintenance, servicing, and
operating time. Use the running time meter(optional
equipment) to keep a record
of
operation and ser-
vicing. Regular service periods are recommended for
normal service and operating conditions. For con-
tinuous duty, extreme temperature, etc., service more
frequently. For infrequent
use,lightduty, etc., service
periods can be lengthened accordingly. Refer to'
Figures
21
and
22
for engine maintenance informa-
tion.
I WARNING a
B.efore
co.
mmenclng any maintenance work
•.
_____
11_
on Ihe engine, generalor, control panel,
automatic transfer switch
or
.ssoclated.·
wlrlng,dllconnect
batterl
...
Failure to do
eo
could
relult
In'
damage
to
the unit
or
serious .peraonal Injury In
Ihe.
event
of
Inadvertent starting.
Operator should periodically make a complete visual
inspection with set running at rated load.
Someofthe
things to check
for
are
as
follows:
1.
Check all fuel and oil lines for possible leakage.
2.
Inspect exhaust lines and mufflers for possible
leakage and cracks.
3.
PeriodicallyordailY,drain moisture from conden-
sation traps.
4.
Inspect air shrouds for leaks and security. Besure
cooling fins are clean.
5.
Inspect electrical wires and connections
for
security and fray damage.'
If
g.nerator.requlresmaJor repair
or
servicing, contact
an
authoriz-
ed
Onan dealer
or
distributor. .
AC GENERATOR
Periodic inspections
that
coincide with engine oil
changes will ensure good performance.
When inspecting the rotating rectifier assembly,
make sure diodes
.are
free
of
dust;
dirt
and grease.
Excessive foreign matter on these diodes and heat
si
nks
will
cause the d iod
es
to overheat and
wi
II
r.esu
It
in their failure.
Blowout
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
25
in. lb. (2.8
N.m)
or
finger tight plus a quarter turn.
See
Figure
1.
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 the electrolyte at
the proper level above the plates
by
adding distilled
water.
Check.
specific gravity; recharge if below 1.280.
20
G
.MAINTENANCE
SCHEDULE._/
Use 'this factory recommended maintenance
schedule (based
on
favorable operating conditions)
to serve
as
a guide to get long and efficient set life.
Neglecting routinemaintenance can result in failure
.
or
permanent damage to the set.
TABLE
1.
OPERATOR AND SERVICE MAINTENANCE SCHEDULE
HOURS
OF
OPERATION
8
50
100
200
500
Call Onan .
serviceman.
1000
- Call Onan
serviceman
5000 - Call Onan
serviceman
MAINTENANCE TASK
• Inspect generator set
• Check
fLJel
supply
• Check oil level,
see
Figure
21.
• Inspect exhaust system.
.
• Check air cleaner,
see Figure
21.
see
Note
1.
• Clean governor linkage,
see Figure
22.
• Change crankcase oil.
..
Check breaker
~oints.
.Clean
crankcase breather, .
• Clean fuel filter.
.. Replace oil filter.
• Check battery condition.
• Replace'oil filter.
• Check start-disconnect circuit.
• Check valve clearances.
•
Grind
valves (if required)
•
Clean.
holes in rocker box
oil line
• Clean generator
..
Remove and clean oil base.
• General overhaul (if teqvired).
see.
Note
2.
NOTE
1.
Perform
more
often in extremely dusty conditions.
2.
Tighten head bolts and adjust valve clearance
afteriirst
. 50
lioursona
new
or
overhauled engine. .
OIL
FilTER
CHAN~E
PI.ace
a pan under old filter and remove filter by
turning counterclockwise. Wipe filter mounting area
. clean. Before installing newfilter, coat the gasket with
a light film
of
'oilor
grease
to
aid removal
for
next
replacement. To instanfilter, turn
it
clockwise until
~\
the gasket touches the mounting
base,
then tighten it
1/2 more turn.
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