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Priming The Fuel
System
Priming the fuel system fills the fuel filters and removes
any air bubbles from the fuel system. This must be
performed before the first use, after any fuel filter
maintenance or if the fuel system is run dry.
On the water separator:
1. Using a 1/2" wrench, loosen the vent screw (A,
Figure 33) on the water separator 2-3 revolutions.
2. Unscrew the priming hand pump (B) located on top of
the water separator. Operate the hand pump up and
down until fuel that is free of air flows from the vent.
3. Tighten the vent screw to 4.5 ft/lbs (6 N.m.). DO
NOT OVER TIGHTEN!
On the engine fuel filter:
1. Using the appropriate size wrench, loosen the vent
screw (C) on the engine fuel filter 2-3 revolutions.
2. Operate the hand pump up and down until fuel that is
free of air flows from the vent.
3. Tighten the vent screw to 4.5 ft/lbs (6 N.m.).
DO NOT OVER TIGHTEN!
On the engine injector pump:
1. Using a 13mm wrench, loosen the vent screw (D) on
the fuel inlet 2-3 revolutions.
2. Operate the hand pump up and down until fuel that is
free of air flows from the vent.
3. Tighten the vent screw to 4.5 ft/lbs (6 N.m.).
DO NOT OVER TIGHTEN!
4. Tighten the priming fuel pump finger tight.
5. Start the engine. (See STARTING THE ENGINE). If
the engine will not start, further priming is necessary.
If the engine starts but misfires or continues to emit
smoke, further priming is necessary.
6. If the engine starts but runs rough, continue to run
the engine at low idle until the engine runs smoothly.
IS5100Z Series - 33 HP Diesel
B
C
Figure 33. Fuel System Priming
A. Water Separator Vent Screw
B. Priming Hand Pump
C. Engine Fuel Filter Vent Screw
D. Injector Pump Vent Screw
15
61" iCD Mower Deck
A
D
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