MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
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Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
5.3 In the first 300 km of driving range, sudden stop should be avoided.
5.4 When the gear box is set at the high-speed gear, you should not drive the vehicle at a low speed.
5.5 Do not drive the vehicle at the high-speed gear or low-speed gear for a long time, you should shift
gears according to the driving condition at the right time.
5.6 When the driving range of a new vehicle reaches to 2500 km, besides daily maintenance, technical
maintenance should also be carried out according to the requirements of first-grade technical
maintenance; the engine oil and the oil filter should be replaced at the same time.
Section VIII Technical Maintenance for Engine
During the service of engines, due to wear of the parts, looseness of tightening parts, looseness of the
electrical connectors, change of clearance, oil deterioration, etc., the technical conditions of diesel
engine will degrade, a variety of abnormal phenomena such as hard starting, power loss, increase of oil
consumption will result, and even the engine can not operate normally. It is important to clean, check,
lubricate and adjust the various parts of the engine regularly and change some of the parts according to
the engine’s technical status and operating time or driving distance.
Attention:
with the purpose of keeping a good technical condition, preventing or reducing
malfunctions and extending the service life of the engine, the technical maintenance must be carried out
seriously according to the specification.
1. Technical Maintenance Cycle
Various kinds of required regular maintenance operation are divided into 4 levels according to the
degrading degree of the parts of diesel engine:
1.1 Daily technical maintenance: usually at the end of each 8~10 h work shift.
1.2 First level technical maintenance: after the diesel engine operating time adds up to 100 h or the
vehicle driving distance adds up to 4000~5000 km.
1.3 Second level technical maintenance: after the diesel engine operating time adds up to 250 h or the
vehicle driving distance adds up to 10000 ~ 12500 km.
1.4 Third level technical maintenance: after the diesel engine operating time adds up to 1000 h or the
vehicle driving distance adds up to 50000 ~ 100000 km, or upon user’s own decision in accordance with
the working condition of diesel engine.
For the maintenance cycle of the GW4D20
／
GW4D20B turbocharged diesel engine, please refer to
Table 2-8-1.
According to technical maintenance requirements, the maintenance may be carried out in the procedure
of filling, cleaning, washing, adjusting, lubricating, repairing or replacing after check-up.
