Doosan D55C-5 Service Manual

D439E Service Manual 2. Engine Mechanical System (D439E)
21
Items
Standard
([] indicates standard
diameter)
Limit
Corrective
action
Outer side valve Spring
Free height
Load installed
Winding direction
Out of squareness
Inner side valve spring
Free lenqth
Load Installed
Winding direction
Out of squareness
66.1mm
26.5~29.3kg
To the right
1.5mm
60.0mm
11.5~12.7kg
Left side
1.5mm
63mm
23.7kg
2.1mm
57mm
10.3kg
2.1mm
Replace
Cylinder block
Cylinder bore
Torsion of upper crankcase
Flatness of qasket surface
Out of squareness of gasket surface
Clearance between tappet and crankcase
tappet hole
104.00~104.03mm
Below 0.07mm
0.07mm
0.05mm
[28] 0.045~0.096mm
0.2mm
0.2mm
Replace
Clearance between piston ring and piston
ring groove
No. 1 ring
No. 2 rlng
Oil ring
0.106~0.170mm
0.07~0.11mm
0.03~0.07mm
0.2mm
0.15mm
0.15mm
Replace the
piston ring
Piston ring end gap
No.1 ring
No.2 ring
Oil ring
0.25~0.40mm
0.50~0.65mm
0.20~0.40mm
1.0mm
1.5mm
1.0mm
Replace
Average protrusion of piston
Gasket qrade A.
Gasket grade B
Gasket grade C
0.466~0.526mm
0.526~0.588mm
0.588~0.648mm
Measure the
average
protrusion and
replace the
gasket with the
corresponding
grade gasket
Piston
Piston outer diameter
Clearance between piston and cylinder
sleeve
103.91~103.92mm
0.080~0.130mm
Repair with
oversize or
replace
Piston pin
Outer diameter of piston pin
Clearance between piston pin and piston pin
hole
Clearance between piston pin and
connecting rod end bush
37.994~38.00mm
0.007~0.021mm
[38] 0.025~0.046mm
0.05mm
0.1mm
Replace
Replace bush

Doosan D55C-5 Specifications

General

Brand	Doosan
Model	D55C-5
Category	Engine
Language	English