Service Manual for WP6 Diesel Engine
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3752 Steps to Disassemble Fuel Filters
(1) Remove the hollow bolts that connecting low pressure fuel pipe and coarse/fine fuel filter.
(2) Remove the bolts that connecting coarse/fine fuel filter and fixed support.
(3) Remove filter element and filter seat.
3753 Inspection and Maintenance of Fuel Filters
(1) Check whether the filters are intact.
(2) Check the fitting area between fuel filter and filer seat for oil leakage, replace the relevant parts
if so.
(3) Check whether the fuel filter is blocked, replace the filter element if so. When replacing filter
element, firstly remove the filter element, and then fill clean diesel oil into the new filter fully,
in the meantime keep filter seat clean and apply lubricating oil on the rubber gasket; After the
rubber gasket touched the seat, tighten the filter for another 3/4~1 circle to seal it up; finally,
screw off the air bleed screw on filter seat, operate the hand pump on injection pump to bleed
the filter.
3754 Steps to Assemble Fuel Filters
Assembling steps are contrary to disassembling ones. But note that when replacing filter element,
firstly remove the filter element, and then fill clean diesel oil into the new filter fully, in the
meantime keep filter seat clean and apply lubricating oil on the rubber gasket; After the rubber
gasket touched the seat, tighten the filter for another 3/4~1 circle to seal it up; finally, screw off
the air bleed screw on filter seat, operate the hand pump on injection pump to bleed the filter.
376 Disassembly, Inspection, Maintenance and Assembly of Low Pressure
Fuel Pipe
3761 Exploded View of Low pressure Fuel Pipe
Refer to Fig. 3-46 Exploded view of fuel injection pump.
3762 Steps to Disassemble Low pressure Fuel Pipe
(1) Remove the low pressure fuel pipe fixing cylinder cover and the fixed support on engine block.
(2) Remove hollow bolts that low pressure fuel pipe and fuel pump.
(3) Remove hollow bolts that low pressure fuel pipe and coarse/fine fuel filter.
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