Doosan D35S-5 Service Manual page 203

Installation
1. Rotate the crankshaft to align the engine No 1
cylinder at the TDC (Top Dead Center) position.
2. Before installing the pump assemble the following
parts at first.
a. Place the key groove (1) of the pump at the
center of the top.
b. Insert the O-ring into the pump and insert the
spacer (3) into pump shaft.
c. Insert the O-ring 2(4) onto spacer and inset the
supply pump gear.
3. Tighten the nut (5) with tightening torque.
Tightening torque : 6.0~7.0kgf.m
If they are not fastened with the specified torque,
supply pump and gear may be loosened so that
the engine may be damaged or engine may stop.
D439E Service Manual
CAUTION
4. Insert the pump assembly (1) and gear (2) Into
the timing gear case.
At this time, insert It as the *mark of the supply
pump gear tooth aligns to ▽ mark of timing gear
case.
NOTE : Be sure to align the *mark at the top of gear
tooth to the mark of timing gear case Otherwise, the
engine performance could be deteriorated and there
may have problems In the emission gas
5. Fasten the bolt (1) with the tightening torque after
installing pump.
Tightening torque 1 9~28kgfm
6. When replacing the pump with a new one, delete
the learned value of previous pump Inside the
ECU and be sure to perform [pump learning
Initialization] in the 'actuator test items' to Initialize
the learning of the new pump.
NOTE : After 10 seconds from [pump learning
Initialization] is completed, turn the Ignition key off.
(Wait for 10 seconds at key off state).
201 4. Fuel system