WEICHAI WP2.1C Operation And Maintenance Manual - page 12
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel
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be done in the order as shown in Fig.2. When dismounting the cylinder head,
slacken the bolts in the reverse order. The operation procedure should be followed
to prevent leakage and cylinder head deformation.
Fig.2 Fig.3
When mounting the fuel injector into the cylinder head, make sure that the
protrusion of the injector tip from the cylinder head reaches the specified value (see
Fig.3). It can be adjusted with shims.
3.2 Cylinder Block
On the front, there are the gear case, gear case cover, oil pump, timing gears,
water pump and fan assembly.
On the left side of the cylinder block mounted the injection pump, lubricating oil
filter and oil cooler.There is an inspection window on gear case for timing the
injection pump in service. Before dismounting the injection pump, remove the
inspection window covers and turn the crankshaft (less than two revolutions) so as to
align the mark on injection pump gear with the points in the inspection windows
respectively (you can make a mark on the injection pump gear also). The crankshaft
should not be turned before mounting the injection pump again. When mounting,
make sure that the mark on the injection pump gear is aligned with the point in the
inspection window.
On the right side are mounted the generator, starting motor.
The flywheel housing is attached to the rear of the cylinder block. Through the
inspection window on the top of the flywheel housing, marks can be seen on the rim
of the flywheel indicating the TDC and the beginning of fuel delivery to the first
cylinder. Both flywheel and flywheel housing have the SAE standard dimensions.
The main bearing covers and the cylinder block are machined in couple. The
main bearing covers are marked with sequence numbers and orientational arrow
marks. They are not interchangeable and should be installed with the arrow marks
pointing to the front side (fan and gear side) of the engine. When tightening the main