probst POWERPLAN PP, Operating Instructions Manual, Page: 163 / 230

13 PERIODIC SERVICE
ENG
L
IS
H
B
Air bleeding the fuel system
CAUTION
To avoid personal injury;
A Do not bleed a hot engine as this
could cause fuel to spill onto a hot
exhaust manifold creating a danger
of fire.
Air bleeding of the fuel system is required if;
A
after the fuel filter and pipes have been detached
and refitted;
A after the fuel tank has become empty; or
A before the engine is to be used after a long storage.
[PROCEDURE ] (gravity feed fuel tanks only)
1. Fill the fuel tank to the fullest extent. Open the fuel
filter lever.
2. Loosen air vent plug of the fuel filter a few turns.
3. Screw back the plug when bubbles do not come up
any more.
4. Open the air vent plug on top of the fuel injection
pump.
5. Retighten the plug when bubbles do not come up
any more.
[GRAVITY FEED SYSTEM]
[PROCEDURE ] (fuel tanks lower than injection
pump)
1. For fuel tanks that are lower than the injection pump.
The fuel system must be pressurized by the fuel
system electric fuel pump.
2. If an electric fuel pump is not used, you must
manually actuate the pump by lever to bleed.
3. The primary fuel filter ��� must be on the pressure
side of the pump if the fuel tank is lower than the
injection pump.
4. To bleed follow (2) through (5) above.
(PROCEDURE )
A Tighten air vent plug of the fuel injection pump
except when bleeding, or it may stop the engine
suddenly.
[TANK BELOW INJECTION PUMP SYSTEM]
B Checking the fuel pipes
CAUTION
To avoid personal injury;
A
Check or replace the fuel pipes after
stopping the engine. Broken fuel
pipes can cause fires.
Check the fuel pipes every 50 hours of operation. When
if;
1. If the clamp band is loose, apply oil to the screw of
the band, and tighten the band securely.
2. If the fuel pipes, made of rubber, became worn out,
replace them and clamp bands every 2 years.
3. If the fuel pipes and clamp bands are found worn or
damaged before 2 years' time, replace or repair
them at once.
4. After replacement of the pipes and bands, air-bleed
the fuel system.
(1) Air vent plug
(2) Injection pump
(3) Fuel filter
(1) Fuel tank below injection pump
(2) Pre-filter
(3) Electric or Mechanical pump
(4) Main Filter
(5) Injection pump
E.book Page 13 Friday, May 24, 2013 2:09 PM