Bucket - Komatsu WA250-6 Shop Manual

700 Work equipment
Work equipment linkage

1. Bucket

2. Bell crank
3. Bucket cylinder
4. Lift cylinder
5. Lift arm
6. Bucket link
No. Check item
Clearance between bushing and pin
7
at each end of bucket link
Clearance between bushing and pin
8
connecting lift arm and bucket
Clearance between bushing and pin
9
connecting lift arm and frame
Clearance between bushing and pin
10
connecting bucket cylinder bottom
and frame
Clearance between bushing and pin
11
connecting bucket cylinder rod and
bell crank
Clearance between bushing and pin
12
connecting bell crank and lift arm
Clearance between bushing and pin
13
connecting lift cylinder rod and lift
arm
Clearance between bushing and pin
14
connecting lift cylinder bottom and
frame
Connecting part of bucket cylinder
15
and frame
Connecting part of lift
16
arm and frame
Connecting part of lift arm and
17

bucket

Connecting part of bucket link and
18
bucket
Connecting part of lift cylinder and
19
frame
Connecting part of bell crank and
20
bucket link
Connecting part of bell crank and lift
21
arm
Connecting part of bucket cylinder
22
and bell crank
Connecting part of lift arm and lift
23
cylinder
WA250, 250PZ-6
Standard
size
75
75
75
85
85
85
75
70
Width of boss
Standard
Tolerance
size
90
Left side 108
Right side 108
86
85
94
85
161
90
86
Criteria
Tolerance
Standard
clearance
Shaft Hole
–0.030 +0.174 0.130 –
–0.076 +0.100
–0.030 +0.174 0.130 –
–0.076 +0.100
–0.030 +0.174 0.130 –
–0.076 +0.100
–0.036 +0.207 0.156 –
–0.090 +0.120
–0.036 +0.207 0.156 –
–0.090 +0.120
–0.036 +0.207 0.156 –
–0.090 +0.120
–0.030 +0.174 0.130 –
–0.076 +0.100
–0.030 +0.174 0.130 –
–0.076 +0.100
Width of hinge
Standard
Tolerance
size
+0.8
93
0
— 116
— 111
— 88
±1.0 88
0
98
–0.5
±1.0 93
±1.5 164
+0.8
93
0
— 88
SEN03831-00
Clearance
limit
1.0
0.250
1.0
0.250
1.0
0.250
1.0
0.297
(Replace pin when
it has scuff marks,
1.0
0.297
1.0
0.297
1.0
0.250
1.0
0.250
Standard
clearance
±1.5 0.7 – 4.5
±1.5 6.5 – 9.5
Adjust shim so that
±1.5 1.5 – 4.5
clearance will be
below 1.5 mm on
+3.0
2.0 – 5.0
0
+3.0
2.0 – 7.0
0
±1.5 2.5 – 6.0
±1.5 5.5 – 10.5
±1.5 0 – 6.0
±1.5 0.7 – 4.5
Adjust shim so that
clearance will be
±1.5 0.5 – 3.5
below 1.5 mm on
Unit: mm
Remedy
Replace
too.)
each side
Replace
each side
3
10-700