Inspecting Fuel Pump - Mitsubishi Heavy Industries SL Series Service Manual

FUEL SYSTEM

2.4 Inspecting fuel pump

The fuel pump is available in 3 types and the type differs
based on engine specifications.
(1) Electromagnetic plunger-type fuel pump
For this pump, a large-sized pump of normal type with
a filter element and a small-sized pump of compact type
without a filter element are available. In either type,
apply the specified voltage, and check for operation and
fuel leakage.
For the type with filter element, remove the cover and
clean or replace the filter element.
(2) Electromagnetic diaphragm-type fuel pump
Do not disassemble this pump. Apply the specified
voltage, and check for operation and fuel leakage.
8-16
Cover
Plunger fuel pump (standard version)
Check for external damage,
fuel leakage
Plunger fuel pump (compact-size version)
Check for external damage,
fuel leakage
Electromagnetic diaphragm-type fuel pump
Replace filter element:
every 400 hours