WEICHAI WD615 - Case Description about Insufficient Output (2)

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3.3.2 Case Description about Insufcient Output (2)
● There is insufcient output when engine is in large load, but
there is no big smoke.
● Inspect air lter, turbocharger and initial angle of fuel supply
are normal.
● Inspect whether low pressure fuel passage and every pipe
are leaked. When check fuel lter, we nd that fuel lter and fuel-
passed screw lter net of fuel pump are dirty and blocked and that
fuel passage isn’t circulated, which causes high pressure fuel pump
can’t supply fuel and output is insufcient.
Block fuel filter element and fuel-passed
screw lter net of fuel pump
Add water lter, replace fuel
filter element and fuel-passed
screw lter net of fuel pump
Case analysis
Remedy
Block lter
element
Block lter
element