Doosan DX60R Shop Manual page 311

Disassembly of Camshaft and Timing Components
Discard all gaskets, O-rings and seals. Use new gaskets, O-
rings and seals on reassembly of the camshaft and timing
components.
Removal of Timing Gear Case Cover
1. Remove the bolt and washer retaining the crankshaft
pulley.
Use care not to damage the threads in the end of the
crankshaft when removing the crankshaft pulley.
2. Remove the crankshaft pulley using a gear puller.
3. Remove the bolts that retain the gear case cover to the
cylinder block and oil pan.
4. Remove the gear case cover (1, Figure 168).
Checking Timing Gear Backlash
Prior to removing the timing gears, measure the gear backlash
and determine the gear wear.
Check the backlash between each pair of mating gears (Figure
169). If not within specification, replace both mating gears. See
"Timing Gear Backlash" on page -97 for service limits.
NOTE:
Do not allow the gear being checked to move axially
as excess end play could cause a false reading.
Reference Number
1
2
3
4
5
6
7
Engine
IMPORTANT
Description
Fuel Injection Pump Drive Gear
Camshaft Drive Gear
Auxiliary Drive Gear (Optional)
Crankshaft Drive Gear
Direction of Rotation
Oil Pump Drive Gear
Idler Gear
Figure 168
1
B
B
C
A
7
A
6
5
Figure 169
2
C
3
4
FG008920
SP001693
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