C-97
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
F. FUEL FILTER
1. Function
This filter provides clean, moisture free fuel for the
injection process. A hand primer is provided to
manually remove excess air from the fuel filter and fuel
lines.
Major Components:
• Hand Primer (F)
• Air Bleeding Screw (G)
• Fuel Filter (D)
2. Theory of Operation
Fuel enters the filter at inlet (A) and flows through the
filter element separating water if contents before
flowing through outlets (B) to the fuel injection pump.
Since water and contaminants settle at the bottom of
the sediment bowl, a drain plug is provided at the
bottom of the filter. Drain water in fuel, by loosening
drain plug once every 50 hrs. of operation.
Drain water in fuel, by loosening this plug once every
50 hrs. of operation.
3. Bleeding Fuel System
1. Loosen the air bleeding screw (G-3) on the filter
and push hand primer (F-3) down. The hand primer
automatically retain it’s original position due spring
& fuel will suck from the fuel tank.
2. Repeat priming till flow of fuel free of air is not
observed.
3. Loosen fuel inlet connection on the injection pump
and operate the hand primer pump untill all air is
displaced. Tighten the connection.
4. Release the air bleed screw on the injection pump
and again use the hand primer untill all air is
displaced. Tighten the connection.
5. Repeat operation ‘1’ to expel and air which may
have been drawn in.
6. Turn the engine for one half revolution and repeat
item 2 to ensure complete scavenging of transfer
pump.
7. Loosen the connections on the high pressure pipes
at the injection nozzle. Turn over the engine until
fuel flows from pipe free of air, then re-tighten the
connections.
F
A
D
C
B
G
E
Fig. 3
NOTE: Drain water once in a week or earlier if
water contamination is excessive. Continued
driving with water accumulation in fuel filter
will cause damage to fuel pump / other fuel
system components.
NOTE: Replace fuel filter at the recommended
period or whenever it gets clogged.
Discard the old filter and do not repair or clean
the filter.
Always fit the spin-on filter dry.
Do not hold key at engine start position for
more than 10 seconds continuously. If more
engine cranking is needed try again after
30 seconds.
Always close the air vent screw except for
bleeding fuel lines other wise, engine will run
irregularly or stall frequently.
A. Fuel Filter Inlet
B. Fuel Filter Outlet
C. Drain Pipe
D. Fuel Filter
E. Fuel Filter Adapter
F. Hand Primer
G. Air Bleeding Screw
Fuel System
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