Track Roller - Komatsu ecot3 PC300LC-8 Shop Manual

10 Structure, function and maintenance standard

Track roller

No. Check Item
1
Outside diameter of outer flange
Outside diameter of inner flange
2
(Double flange)
3
Outside diameter of tread
4
Thickness of tread
5
Overal width
Single flange
6
Width of tread
Double flange
Single flange
7
Width of flange
Double flange
Width of inner frange
8
(Double frame)
Clearance between bushing and
9
collar
(Sum of clearance at both sides)
Clearance between shaft and
10
bushing
Interference between roller and
11
bushing
PC300, 350-8
1
Standard size
216
210
180
54
250
49
47.7
27
98
0.44 – 0.97
Tolerance
Standard
size
Shaft
–0.250
65
–0.350
Tolerance
Standard
size
Shaft
+0.108
72
+0.008
Criteria
Rapair limit
—
—
168
48
—
—
—
—
—
Standard Clearance
clearance
Hole
+0.186 0.186 –
–0.064 0.536
Standard Interference
interference
Hole
–0.006 0.014 –
–0.036 0.144
SEN01992-00
Unit: mm
Remedy
Build-up welding
for rebuilding or
replace
limit
Replace bushing
—
limit
—
7