Doosan D55C-5 Service Manual

D439E Service Manual 2. Engine Mechanical System (D439E)
56
3. Check the valve tappet (1) for any damage or
wear.
4. Measure the rocker inner diameter and rocker
shaft outer diameter. Replace the bush of rocker,
if the gap exceeds the limit
Items Standard Limit
Inner diameter
of rocker bush
18.980 ~ 18.993 mm -
Outer diameter
of rocker shaft
19.05 ~ 19.09 mm -
Gap 0.06 ~ 0.11 mm 0.2 mm
5. Inspect the out of squareness (A), free length (B),
load installed (C) of valve spring, replace it if any
of them exceeds the limit.
Items Standard Limit
Free length 66.1 mm 63 mm
Load
installed
27.9 ± 1.4 kg 23.7 kg
Outer
side
Valve
spring
Out of
squareness
1.5 mm 2.1 mm
Free length 60 mm 57 mm
Load
installed
12.1 ± 0.6 kg 10.3 kg
Inner
side
Valve
spring
Out of
squareness
1.5 mm 2.1 mm

Doosan D55C-5 Specifications

General

Brand	Doosan
Model	D55C-5
Category	Engine
Language	English