Komatsu PC88MR-10 Shop Manual page 1270

60 Maintenance standard
Track shoe
No. Item
Link pitch
1
Outside diameter of
2
bushing
Link height
3
Thickness of link
4
(bushing press-fit part)
5
Shoe bolt pitch
6
7
Inside
8
width
Overall
9 Link
width
Tread
10
width
11 Protrusion of pin
Protrusion of regular
12
bushing
13 Overall length of pin
Overall length
14 Master
of bushing
15 Thickness of bushing
16 Thickness of spacer
Bushing
17
Regular
18
Press-fitting
pin
force
(*1)
Master
pin
19
a:
Regular
link
20 Shoe bolt
b:
Master
link
60-18
Standard dimension
154.3
Standard dimension
41.3
Standard dimension
74
20
Standard dimension
8.4
49.0 to 62.8 kN {5 to 6.4 ton}
49.0 to 117.7 kN {5 to 12 ton}
39.2 to 78.5 kN {4 to 8 ton}
Tightening torque
(Nm {kgm})
Rubber pad
117.7 ±
shoe
19.6
Triple grouser
{12 ± 2}
shoe
117.7 ±
19.6
Road liner
{12 ± 2}
Tightening torque Retightening angle
(Nm {kgm})
Criteria
Repair limit
157.3
Invert
37.3
Repair limit
70
16
89
73
57
45
30
26.3
3
3.15
131
74.6
Repair limit
4.4
Retightening angle
(deg.)
90 ± 10
60 ± 5
Lower limit torque
(deg.) (Nm {kgm})
Unit: mm
Remedy
Turn 180
deg. or
replace
Repair or
replace
Replace
Repair or
replace
Adjust or
replace
Retighten
PC88MR-10