Doosan D55C-5 - Operation Section; Operator’s Station and Monitoring Systems

D439E Service Manual 2. Engine Mechanical System (D439E)
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2. Install the crankshaft gear (1).
3. Install the idler shaft A (1) and idler shaft B (2).
CAUTION
a. When installing the idler shaft A and B, do not
tighten the mounting bolts at once.
b. After installing the idler shaft A and B, check
to see whether the shaft rotates smoothly.
4. Install idler A and B.
CAUTION
a. When installing, align the timing mark “1” of
idler gear A (1) with the timing mark “1” of
crankshaft gear (2).
b. When installing, align the timing mark “4” of
idler gear B (1) with the timing mark “4” of
idler gear A (2).