Fuel System FUEL FILTER
1.
Function
F
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.
E
G
Major Components:
B
A
D
C
Fig. 3 A. B. C. D. E. F. G.
F.
Fuel Filter Inlet Fuel Filter Outlet Drain Pipe Fuel Filter Fuel Filter Adapter Hand Primer Air Bleeding Screw
•
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.
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.
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.
Always close the air vent screw except for bleeding fuel lines other wise, engine will run irregularly or stall frequently. 35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
C-97
