3-3
Chapter 3 OPERATION
Priming pump cap tightening method
1. Tighten the priming pump cap firmly by hand, and
place a mark on the priming pump cap.
2. Use a wrench or another appropriate tool to tighten
the priming pump cap 90° ± 10°.
3. Check the mounting position of head packing.
Note: If the head packing has abnormality such as de-
formation or scratches, consult your Mitsubishi
dealer, as the priming pump needs to be
changed.
Fig. 3-4 Priming pump cap tightening method
Fig. 3-5 Priming pump head packing
Never fail to tighten the priming pump cap to the
specified angle. If the priming pump cap is not firmly
tightened, internal thread will be worn due to engine
vibration, resulting in sudden ejection of the cap to
cause fuel flow-out. Or if the priming pump cap is
excessively tightened, the head of the priming pump
can be damaged.
90 ± 10°
Position where
hand-tightening
becomes suddenly
heavy
Priming pump
Head section can be
damaged when
overtightened
(ǰ=120
°or more)
Head packing
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