MacDon M150 SP - Manual (Page 148)

MAINTENANCE AND SERVICING - M150 ENGINE
Form 169017 / 169087 / 169095
146
Revision C
7.8.6.5 System Priming
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
automatically, if the fuel filters are changed in
accordance with instructions.
WARNING
The fuel pump high-pressure fuel lines and
fuel rail contain extremely high pressure fuel.
Never loosen any fittings. Personal injury
and property damage can result.
IMPORTANT
Bleeding the fuel system is not
recommended nor required.
Manual priming will be required if:
• The fuel filter is replaced.
• Injection pump is replaced.
• High-pressure fuel lines are replaced.
• Engine is run until fuel tank is empty.
Prime the fuel system as follows:
a. Stop the engine and remove the key.
b. Open engine compartment hood to lowest
position.
c. Turn the priming knob (A) counter clockwise to
unlock the plunger on the primary filter (B) head.
d. Pump approximately 120 times to pressurize the
fuel system.
e. Lock the plunger by turning knob (A) clockwise
until snug.
f. Try starting engine. If engine does not start,
repeat priming.
B
A