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3. SWING DEVICE
1)
WEARING PARTS
Inspection item
Clearance between piston and cylinder block bore
Thickness of valve plate
Play between piston and shoe caulking section (δ)
Thickness of shoe (t)
Combined height of retainer plate and spherical
bushing (H-h)
Thickness of friction plate
t
2)
SLIDING PARTS
Part name
Shoe
Shoe plate
Cylinder
Valve plate
δ
140W77MS12
Standard roughness
Rmax=1S (Ra=0.2a)
(LAPPING)
Rmax=0.4S (Ra=0.1a)
(LAPPING)
Rmax=0.4S (Ra=0.1a)
(LAPPING)
Rmax=0.4S (Ra=0.1a)
(LAPPING)
7-23
7-23
Recommended
Standard
replacement
dimension
value
0.041
0.060
6
5.88
0.025
0.1
6.6
6.5
17.6
17.3
2.94
2.7
Allowable roughness
4S (Ra=0.1a)
3S (Ra=0.8a)
3S (Ra=0.8a)
2S (Ra=0.5a)
Counter measures
Replace piston or
cylinder block
Replace
Replace assembly
of piston and shoe
Replace assembly
of piston and shoe
R e p l a c e s e t o f
retainer plate and
sperical bushing
Replace
h H
2609A7MS01
Remark
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Troubleshooting
