Komatsu SAA6D140E-3 - Page 115

140-3 SERIES
11-51
STRUCTURE AND FUNCTION, MAINTENANCE STANDARD OIL PUMP
Unit: mm
No. Check item Criteria Remedy
1
Axial clearance of
pump gear
Standard
size
Tolerance
Standard
clearance
Clearance
limit
Replace
gear or
body
Gear
thickness
Housing
depth
54
0
–0.030
+0.067
+0.040
0.04 –
0.097
0.10
2
Radial clearance of
pump gear
Standard
size
Tolerance
Standard
clearance
Clearance
limit
Gear O.D.
Housing
I.D.
54.99
–0.15
–0.21
+0.06
0
0.15 –
0.27
0.30
3
Clearance between
drive shaft and pump
body bushing
Standard
size
Tolerance
Standard
clearance
Clearance
limit
Replace
bushing
Shaft Hole
18
+0.106
+0.088
+0.173
+0.146
0.040 –
0.085
—
4
Clearance between
driven shaft and driven
gear bushing
18
+0.090
+0.070
+0.147
+0.122
0.032 –
0.077
—
5
Clearance between
driven shaft and body
18
+0.090
+0.070
+0.129
+0.102
0.012 –
0.059
—
6
Clearance between
relief valve and pump
cover
16
–0.040
–0.060
+0.043
0
0.040 –
0.103
—
7
Interference between
drive shaft and oil
pump drive gear
Standard
size
Tolerance Standard
interfer-
ence
interfer-
ence limit
Replace
Shaft Hole
18
+0.106
+0.088
+0.065
+0.047
0.023 –
0.059
—
8
Interference between
drive gear and drive
shaft
18
+0.106
+0.088
+0.049
+0.028
0.039 –
0.078
—
9
Interference between
drive shaft bushing
and pump cover
21
+0.090
+0.065
+0.021
0
0.044 –
0.090
—
10
Interference between
driven shaft bushing
and driven gear
21
+0.090
+0.065
+0.021
0
0.044 –
0.090
—
11
Interference between
driven shaft and pump
cover
18
+0.090
+0.070
+0.040
+0.022
0.030 –
0.068
—
12
Main relief valve
spring
Standard size Repair limit
Free
length
Installed
length
Installed
load
(N{kg})
Free
length
Installed
load
(N{kg})
49.1 32.0
126.4
{12.9}
—
113.7
{11.6}
13
Main relief valve set
pressure
Standard: 588 ± 49kPa {6.0 ± 0.5 kg/cm
2
}