MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
58
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig.2-12-7 Checking the oil level in the
diesel engine
It is recommended to use APlCl-4 or above diesel engine
oil produced by Mobil Oil Corporation.
Start the diesel engine and check if the lubrication
system works properly, and check if there is leakage in
the oil filter.
Fig. 2-12-8 Fuel filter
Fig.2-12-9 Water level indicator lamp of
water-fuel separator
4. Fuel System
Fuel filter
Caution:
The fuel filter is disposable and is not
allowed to be reused.
The cartridge and filter core of the fuel filter assembled on
the CW4D20
／
CW4D20B turbocharged diesel engine is
integral; when they are replaced, the whole filter
assembly should be replaced.
Replace the fuel filter regularly in accordance with
technical Maintenance requirements.
Replacing Sequence:
(1) Loosen the fuel filter in the anticlockwise direction with
a filter spanner.
Fuel filter spanner: 5-8840-0253-0.
(2) Clean the matching surface of the upper cover of the
fuel filter.
(3) Install a new fuel filter and tighten it until it contacts
with the sealing face.
(4) Screw it for additional 3/4
～
1 circle with a filter
spanner.
(5) Operate the hand fuel pump several times and check
if there is fuel leakage.
Attention:
It is recommended to use the original
fuel filter produced by our company.
Water drain sequence for the fuel-water separator
When the water content in the fuel-water separator
exceeds the specified value, the indicator lamp on the
instrument panel will light up. See Fig. 2-12-9.
Drain the water and other impurities in the fuel-water
Engine oil
dipstick
Engine
oil
dipstick guide
pipe
Upper scale
Lower scale
Hand fuel
pump
Oil return
hose
connector
Oil inlet pipe
connector
Cartridge and
filter core
Electric
connector
Water drain plug
