5 . MAINTENANCE AND ADJUSTMENTS
5.14
Challenger MT500B EU
5.8 - FUEL SYSTEM
5.8.1 - Fuel prefilter and filter
Check the prefilter bowl for water at regular intervals and
drain as necessary (
5. Fig. 15).
Change 150 micron prefilter element every 400 hours.
Drain the water from the prefilter sediment bowl every
100 hours.
Place a receptacle beneath the element (
5), then open the
tap in the lower section to allow water and sediment to run
out, close the taps, then operate the fuel lift pump.
Replace the filter element(s) every 400 hours (6 Fig. 15).
Discard old filter elements as required by environmental
protection regulations.
1. Clean the filter and surrounding area.
2. Open fast fitting ring A and remove the filter element.
3. Fill and assemble the new filter element.
4. Turn the fast fitting ring until it clicks into the ON posi-
tion.
5. Activate the supply pump to fill the filters (MT525B to
MT545B).
6. Switch on the ignition and allow the electric fuel lift
pump to operate for 30 seconds. Start the engine and
check the fuel filter for tightness.
7. Bleed the fuel system.
NOTE: To avoid water condensing in the fuel tank, refill
with fuel at the end of the working day.
5.8.2 - Bleeding the fuel system
To ensure correct operation of the engine, the fuel system
must be in perfect condition and free of air.
The bleeding of the fuel supply system is automatic. How-
ever, to avoid activating the starter motor for too long, it is
recommended to trigger the circuit with the supply pump
manual lever (MT525B to MT545B).
Do not disconnect any unions or pipes.
NOTE: The pump lever must be moved to its limit of
travel. If the pump does not operate and no resistance
is felt when the lever reaches its limit of travel, activate
the starter to change the pump control cam position.
IMPORTANT: Only activate the starter motor once in a
30 second interval to avoid overheating.
Clean fuel lift pump strainer every 400 hours.
5.8.3 - Fuel injection pump, regulator and injectors
The injection pump and injectors must be adjusted and
checked by your dealer or agent.
5.8.4 - Fuel tank
Drain the fuel tank every 1200 hours with the hose located
under the tank (Fig. 16).
CE-003-01-05
Fig. 15
5
6
A
Fig. 16
Z2-517-05-03
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