Yanmar 4JH45 Operation Manual page 82

PERIODIC MAINTENANCE
Figure 64JH80, 4JH110
1 2
5 4
Figure 21
1 – Coolant drain cock (Turbocharger)
2 – Turbocharger
3 – Coolant drain cock
(Cylinderblock)
4 – Marine gear oil cooler (KMH4A)
5 – Seawater drain cock
(Marine gear oil cooler)
Figure 7
6 7
11
Figure 22
6 – Coolant pump
7 – Coolant tank (Heat exchanger)
8 – Coolant drain cock (Coolant
tank/Heat exchanger)
9 – Seawater drain cock (Air cooler)
10 – Air cooler
11 – Seawater pump
(Drain from pump cover)
76
3
056988-00X00
8
10 9
056989-00X00
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 reservoir with
appropriate coolant.
See Engine Coolant Specifications on
page 41 and Checking and Adding
Coolant on page 42 .
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.
Cleaning the Exhaust/Water Mixing
Elbow
The mixing elbow is attached to the
turbocharger. The exhaust gas is mixed
with seawater in the mixing elbow.
1. Remove the mixing elbow.
2. Clean dirt and scale out of the exhaust
and seawater passages.
3. If the mixing elbow is damaged, repair
or replace. Consult authorized Yanmar
Marine dealer or distributor.
4. Inspect the gasket and replace if
necessary.
JH Series Operation Manual