2. MAINTENANCE
2-67
2.4.10 LOWER ROLLER (SK200-8, SK250-8)
Fig. 2-52 Lower roller
Unit : mm (in)
No. ITEM STANDARD VALUE
REPAIRABLE
LEVEL
SERVICE
LIMIT
REMEDY
A O.D. of flange ø 185 (7.28) — —
Reinforcement weld,
repair or replace
B Tread dia. ø 150 (5.91) ø 134 (5.28) ø 128 (5.04)
C Flange width 23.5 (0.925) 18 (0.709) 16.5 (0.65)
Replace bushing
D
Clearance between
shaft and bushing
(Wrapped bushing)
Basic
dimension
Tolerance Fit Fit
ø 65
(2.55905)
Shaft
- 0.060
(-0.00236)
- 0.090
(-0.00354)
Clearance
0.7 (0.276)
Clearance
1.0 (0.394)
E
Interference between
roller and bushing
ø 69
(2.71653)
Hole
+ 0.030
(+0.00118)
- 0.020
(-0.00079)
Interference
0
Clearance
0.01 (0.0004)
F Oil Engine oil API grade CD #30, 160cc (9.8 cu•in) Refill
HPlug (8)
Execute air leak test at 0.2MPa (28psi)
before tightening the plug.
Roller rotation Rotates smoothly by hand. Reassembly
Copyright © 2015 Kobelco Construction Machinery Co.,Ltd. All rights reserved. [S7YO00809ZE03] [0604CsCshWbYs]
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