3. ATTACHMENT DIMENSIONS 3.1.2
BOOM MAINTENANCE STANDARDS
(1) Clearance of pin and bushing on boom section
Fig. 3-2 Clearance of pin and bushing on boom section Table 3-2 Unit: mm (in) Standard dimensions Pos.
A
Item
Boom foot
B
Boom cylinder (Head side)
C
Boom cylinder (Rod side)
D
Dipper cylinder (Head side)
Pin dia.
Clearance
Standard Tolerance Standard Tolerance value for on bushing value on pin dia. repair bore dia. 0.07~ +0.10 –0.02 0.15 +0.05 –0.05 (-0.0008) (+0.0039) (0.0028~ (-0.0020) (+0.0020) 0.0059)
–0.02 –0.08 ø45 (1.7717) (-0.0008) (-0.0031) –0.02 –0.05 (-0.0008) (-0.0020)
+0.12 +0.06 (+0.0047) (+0.0024)
0.08~ 0.20 (0.0031~ 0.0079)
0.7 (0.028)
Servicea- Remedy bility limit
1.0 (0.039)
+0.13 0.09~ +0.07 0.23 (+0.0051) (0.0035~ (+0.0028) 0.0091)
(Note) •
The tolerance for bushing inside diameter means the dimension after fitting of it into place.
•
The part number for pins may be changed owing to improvement, use them only for reference.
3-4
Replace bushing or pin