OPERATION & MAINTENANCE MANUAL STE35SR
Fuel pre-filter element - replacement/maintenance
(1) Fuel pre-filter - drainage and cleaning
After engine shutdown, all parts are still in a high temperature state, so do not replace the
filter immediately. The replacement can only be carried out after the temperature of each part
comes down.
When the engine is running, there is high pressure in the fuel hose. After the engine is
stopped, wait for 30 seconds to release the pressure before operation.
Do not go near an open flame.
Prepare a strainer wrench.
Prepare a container for discharging fuel.
1. Open the engine cover, ensure that the brace is
locked, and place the valve in the closed position.
2. Remove the water collecting cup of fuel
pre-filter and drain the water clean. If the water
collecting cup contains impurities, clean the water
collecting cup with clean diesel oil.
3. After cleaning the water collecting cup, install
the water collecting cup by rotating the filter
wrench counterclockwise.
4. Open the valve, loosen the brace and close the engine cover.
NOTE
The water in the water cup needs to be drained frequently, and if it is mixed with the fuel, it
will cause damage to the engine.
When impurities accumulate in the cup, clean the cup immediately, otherwise impurities may
enter the engine and cause engine clogging or early wear.
(2) Fuel oil fine filter element - replacement
1. Open the rear hood of the engine and lock the rear hood with a brace.
2. Turn the fuel fine filter element to the left with the filter element wrench, and remove the
filter element.
3. Clean the filter seat, coat the sealing ring of the new filter element with oil, turn the filter
element to the right by hand, until the sealing gasket of the filter element contacts the sealing
surface of the mounting seat.
4. Tighten the filter 3/4 to the right with the filter wrench.
fuel pre-filter
Fuel oil fine filter
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