4JH4-TE
0004572
(2)
(1)
(4)
(3)
Figure 25
1 – Coolant Drain Cock
2 – Fuel Pump
3 – Seawater Drain Cock
4 – Marine Gear Cooler
4JH4-HTE
(1)
(2)
(6)
(5)
(3)
(4)
0004560
Figure 26
1 – Coolant Tank (Heat Exchanger)
2 – Coolant Pump (Fresh Water)
3 – Seawater Drain from Seawater
Pump Cover
4 – Coolant Drain Cock
5 – Intercooler
6 – Seawater Drain from Seawater
Pump Cover
4JH4-HTE
0004573
(2)
(1)
(4)
(3)
Figure 27
1 – Coolant Drain Cock
2 – Fuel Pump
3 – Seawater Drain Cock
4 – Marine Gear Cooler
Note: The drain cocks are opened before
shipping from the factory. Marine gear
ZF25A does not have a drain cock on the
clutch cooler.
1. Open all coolant drain cocks.
2. Allow to drain completely. Dispose of
waste properly.
3. Close all the drain cocks.
4. Fill coolant tank and coolant recovery
tank with appropriate coolant. See
Engine Coolant Specifications on page
36 and See Checking and Adding
Coolant on page 36.
Cleaning the Intake Silencer (Air
Cleaner) Element
1. Disassemble the intake silencer (air
cleaner).
2. Remove element. Clean element and
housing with a neutral detergent.
3. Dry completely and reassemble.
PERIODIC MAINTENANCE
72 JH4 Series Operation Manual
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