Doosan D35S-5 Service Manual page 43

4. Measure the distortion of camshaft. If it exceeds
the limit, replace or repair it with press.
Distortion of camshaft : 0.02 mm
NOTE : Place the camshaft on the precision block
and turn the camshaft in 1 revolution. And read the
dial indicator. The distortion of the camshaft is a half
of the measurement.
5. Measure the camshaft (1) endplay. If it exceeds
the limit, repair or replace it.
Camshaft endplay
Reference : 0.05 mm ~ 0.22 mm
Limit : 0.3 mm
D439E Service Manual
6. Measure the backlash of each gear and replace it
if necessary.
NOTE : When measuring the backlash, fix the gear
contacting the corresponding gear and move the
gear to the left and right to measure the backlash.
a. Crankshaft gear (1) and idler gear A (2)
Reference : 0.062 ~ 0.159 mm
b. Idler gear A (1) and camshaft gear (2)
Reference : 0.068 ~ 0.175 mm
41 2. Engine Mechanical System (D439E)