WEICHAI WD10 Service Manual - page 105
Service Manual for WD10 Diesel Engine
95
4724 Steps to Assemble Fuel Injection Pump
(1) Install fuel injection pump flange, apply a small amount of lubricating oil on pump rubber ring;
(2) Screw on the hexagon bolts to connect fuel injection pump and the flange;
(3) Install injection pump gears, specification of fuel injection pump gear lock nut is M24×1.5,
tighten the nut to 250~300Nm directly;
(4) Install the threes pump fixing studs on engine block;
(5) Rotate the flywheel until cylinder 1 reaches compression TDC, at this point rotate injection
pump gears until the mark on injection pump gear module is aligned to mark on injection pump
flange, install injection pump module. Insert a Φ4 pin into the corresponding hole on middle
flange and pump gear, pull out the pin after fastening common rail module, and seal the hole up
with M5 screw (applied with sealant). After the assembly, the mark on driving gear of injection
pump should be aligned to mark on driven gear. As shown in Fig. 4-58. Tighten the hexagon
nuts to fasten the injection pump on gear housing.
Fig. 4-58 Fuel injection pump gear marks