Inspection Every 50 Hrs. (Or Monthly) - Yanmar 4JH4-TE Operation Manual

48 5. MAINTENANCE & INSPECTION
5.3.2 Inspection Every 50 Hrs. (or
Monthly)
(1) Drain the Fuel Filter
When water and dirt are mixed in with the fuel, it
becomes impossible for the fuel injection pump and
the fuel injection valve to work. Drain periodically to
keep the filter from becoming clogged. When there is
a lot of drain collected in the oil/water separator, at
the bottom of the fuel filter, the fuel filter alarm lamp
will light up (C panel only).
1) Close the fuel cock.
2) Loosen the plug screw at the bottom of the fuel fil-
ter oil/water separator, and drain off any water and
dirt collected inside.
Note:
When the C type instrument panel is used, the fire-
resisting cover is installed to the lower part of the fuel
filter to protect the alarm switch of water level.
Loosen a hose clamp and remove the fire-resisting
cover.
3) Retighten the plug screw.
4) Be sure to bleed air out of the fuel system.
(See 4.2(3))
When there is a heavy deposit, drain the fuel tank
at the same time.
(2) Checking Electrolyte Level in the Bat-
tery
Before inspecting the electrical system, be sure
either to turn off the battery switch or to disconnect
the (-) terminal of the ground cable. Otherwise, a
short circuit could cause a fire.
Ensure good ventilation when charging the battery.
The use of open flames is strictly prohibited. Hydro-
gen gas may also catch fire.
Battery fluid is dilute sulfuric acid. It can blind you or
burn your eyes or skin. Wear goggles and gloves
when handling battery fluid. Should the fluid be
deposited on your skin, wash with a large quantity of
fresh water and seek treatment from a doctor.
1) If operation continues with insufficient battery fluid,
the battery will be destroyed.
Check the fluid level periodically. If the level is
lower than specified, fill with distilled water (avail-
able in the market) to the upper limit of the battery.
(Battery fluid tends to evaporate in high tempera-
tures, especially in summer. In such cases,
inspect the battery earlier than specified.)
1
2
4
1 Fuel filter
2 Loosen
3
008421-00X
3 Tighten
4 Plug screw