Onan MDJF Series Operator's Manual And Parts Catalog page 21

WATER
M A N I F O L D
F I L L V E N T
V A L V E
H E A T
E X C H A N G E R
E X P A N S I O N T A N K
F I G U R E 15-A. F I L L I N G H E A T E X C H A ? 4 G E R
Whenever water flow is restricted, remove the 1/2-inch
bolt, end cap and gasket at the front end of the heat
exchanger and clean the water passages, Check raw
water intake for seaweed, grass, etc.
Electrical System and Batteries
1. Clean generator brushes and slip rings by wiping with a
clean, dry, lint-free cloth. Do Not Lubricate These Parts.
2. Clean static exciter with dry low-pressure air. Remove
dust and dirt deposits in control box and junction boxes.
3. Disconnect batteries and remove from vessel. Service
batteries by maintaining liquid level and using a trickle
charger to maintain voltage.
CAUTION
3
Discharged batteries are subject to severe
damage if exposed to freezing temperatures:
STORE ALL BATTERIES IN A FULLY CHARGED CONDI-
TION AND MAINTAIN CHARGE DURING STORAGE.
General
1. Cover or seal all exposed openings (exhaust outlet,
water ports, etc.)
2. Cover entire generating plant.
TAG and IDENTIFY unit to indicate SERVICE RE-
QUIRED BEFORE ATTEMPTING TO OPERATE. List
all items requiring attention and service prior to opera-
tion
NOTE: Aqualilt muffler requires no out of service protection.
RETURNING THE SET TO OPERATION
1. CHECK SERVICE IDENTIFICATION TAGS to properly
service the plant.
2. Uncover and remove storage seals from entire unit. Re-
move any dust, dirt, or foreign matter.
3. CHECK fuel supply tanks for moisture accumulations
(drain tanks i f necessary). CHECK lubricating oil for
moisture or contamination (drain i f necessary). CHECK
fuel line connections, all wiring connections, and ex-
haust line connections.
4. Service air cleaner (if used). Torque fuel injectors
and bleed fuel system ( i f moisture or contamination
are found in fuel, replace filters and clean fuel pump
sediment bowl).
5. Service cooling system with clean fresh water. Prime
water pump and see that all air is bled from cooling
system. If anti-freeze was left in closed type cooling
system, check level and service as required.
6. Check entire unit for water, fuel, or oil leaks. Conect
leakage as required.
7: Install fully charged batteries.
8. Start the set in normal method. Check the running set
for leaks, correct voltage output, proper cooling.
HIGH TEMPERATURES
1. See that nothing obstructs air flow to-and-from the set.
2. Keep cooling system clean. Maintain water level- in
closed system cooling.
LOW TEMPERATURES
1. Use correct SAE No. oil for temperature conditions.
Change oil only when engine is warm. If an unexpected
temperature drop causes an emergency, move the unit
to a warm location or apply heated air (never an open
flame) externally until oil flows freely.
2. Protect fuel against moisture condensation.
3. Keep batteries in a well charged condition.
4. Partially restrict cool air flow but use care to avoid
overheating.
5. Add good quality anti-freeze if danger of freezing
exists.
NOTE: Aqualift muffler need not be drained
DIRTY CONDITIONS
1. Keep set clean. Keep cooling system clean.
2. Service air cleaner (if used) as frequently as necessary.
3. Change crankcase oil every 50 operating hours.
4. Keep oil and fuel supplies in dust-tight containers.
5. Keep governor linkage clean.
6. Clean generator brushes, slip rings, and commutator -
do not remove normal (dark brown) film. Do not polish.
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