Yanmar 4JH4E - Inspection Every 250 Hours or One Year

2. Inspection and adjustment
74
2.2.4 Inspection every 250 hours or
one year
Be sure to check the following points every 250
hours or one year operation, whichever comes
first.
(1) Drain the fuel tank
Refer to 2.2.2(1) for the procedure.
(2) Replace the fuel filter
[3JH4E and 4JH4E]
Replace the fuel filter with new one at the
specified interval, before it is clogged with dust
to adversely affect the fuel flow. Also, replace
the fuel filter after the engine has fully been
cooled.
1) Close the fuel cock of the fuel tank.
2) Remove the fuel filter using a filter wrench
(customer procured). When removing the
fuel filter, hold the bottom of the fuel filter with
a piece of rag to prevent the fuel oil from
dropping.
3) Clean the filter mounting surface and slightly
apply fuel oil to the gasket of the new fuel
filter.
4) Install the new fuel filter manually turning until
it comes into contact with the mounting
surface, and tighten it further to one turn
using a filter wrench.
Tightening torque: 20-24Nm
No. Inspection item
(1) Drain the fuel tank
(2) Replace the fuel filter
(3) Replace the engine lube oil and the lube oil filter.
(4) Replace the marine gear lube oil and the lube oil filter.
(5) Check the impeller of the seawater pump
(6) Replace the fresh water
(7) Wash turbocharger blower
(8) Clean the exhaust/water mixing elbow
(9) Clean air cleaner
(10) Adjust the tension of the alternator driving belt
(11) Retighten all major nuts and bolts
(12) Check the wiring connectors
Applicable fuel filter Part No.
129470-55703
Fuel filte
r
010619-00E