ETQ DG4LE Owner's Manual page 25

3-1.1 Changing the engine oil (every
100 hours)
Take the oil cover off. Remove the oil
drain plug when the diesel engine is still
hot. Be careful of hot oil and hot engine
as you may get burned. The bolt is
located at the bottom of the cylinder.
After draining the oil, put the bolt back
and tighten it. Then fill with the proper
engine oil to the proper level.
High-pressure
fuel pipe bolt
Oil drain bolt
3-1.2 Air filter maintenance schedule
1. Clean air-filter every 6
months or 500 hours of
operation.
2. If necessary, exchange it.
3. Do not use detergent to clean
air filter element.
Note:
Never start the engine without
the air filter. This can cause
serious damage to the engine if
foreign objects enter the intake
system. Always change the air
filter on time.
3-1.3 Fuel filter maintenance
1. The fuel filter should be cleaned
often to keep the engine running
at maximum performance.
2. The recommended time period
for cleaning the fuel filter is 6
months or 500 hours of
operation.
a. To do this, first drain the
fuel from the fuel tank.
b. Loosen the small screws
on the fuel switch and
remove the fuel filter
form the port. Use diesel
fuel to clean the fuel
Dipstick
filter. Also, remove the
fuel injector and clean the
carbon deposit around it.
The recommended time
period for this is 3
months or 100 hours.
3-1.4 Cylinder head bolt tensions
The cylinder head bolts should be
tightened to specifications please refer to
the diesel engine manual for
specifications and the special tools
required to do this.
3-1.5 Battery check
Make sure the battery acid is full. The
engine uses a 12V battery. Due to
numerous starting cycles, the battery
acid may be used up. Also, before
filling, verify that the battery is not
damaged in any way. Add distilled
water to the battery when filling.
Perform checks on the battery once a
month.
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