MacDon 7000 Operator's Manual page 76

MAINTENANCE/SERVICE
FUEL SYSTEM (continued)
FUEL SYSTEM AIR REMOVAL· DIESEL ENGINE
Controlled venting of aIr is provided at the injection
pump through the fuel drain manifold. Small
amounts of air introduced by changing filters or
injection pump supply line
will
be vented automatl·
cally,
if
the fuel fllter is changed In accordance with
instructions. (See "Fuel Filters".)
However, manual venting ("bleeding~)
will
be ra·
quired if:
1. The fuellilter is not filled prior to installation.
2. Injection pump Is replaced.
3. High-pressure fuel lines are replaced.
4. Engine is run until fuel tank is empty.
To bleed LOW pressure lines and fuel filters;
1. Loosen the bleed screw (A) located at the outlet
fitting from the fuel filler housing.
2. Operate the hand lever (8) on the
lift
pump until
clear fuel with no air bubbles flows from around
the bleed screw.
NOTE: If hand lever will not pump fuel, crank the
engine a small amount.
3. Tighten the bleed screw (A) .
TO bleed Inlectlon
Dump:
1. Tum key in ignition switch to ON position.
position clockwise after OFF.)
(First
AWARNING: It Is necessary to have the
Ignilion switch In the ON posilion for
this procedure. Be sure everyone In the
area Is aware that the machine Is being
serviced. Lock the cab door and take
the key to prevent unexpected stan up.
2. Loosen bleed screw (C) at the injection pump.
3. Operate the hand lever (B) on the
lift
pump unlil
clear fuel with no air bubbles flows from around
the bleed screw.
NOTE: If hand lever will not pump fuel, crank the
engine a small amount.
4. Tighten the bleed screw (C) .
5. Turn ignition switch OFF and remove key.
70
BLEEOING LOW PRESSURE
LINES AND FILTERS
BLEEDING INJECTtON PUMP