8 - 20
Section F
Transmission
9803/6020
Section F
8 - 20
Issue 1
Track Gearbox
Inspection (cont’d)
Part(s)
Inspection Standard
Permissible
Measuring
Corrective
Action
Measurement
Value
Tolerance/
Tool
Area
Condition
k.
Timing plate
Wear for cylinder
Surface
Wear 0.005 mm
Contour/
Lap the slide surface
109
block
104
roughness
(0.0002 in)
roughness
to correct any slide
0.4S
tester
damage.
(Correctable wear
0.020 mm)
m.
Spool
123
/
Clearance between
Clearance
Clearance
Indicator
rear flange
outer diameter of
0.012 -
0.038 mm
micrometer
101
spool
123
and spool 0.018 mm (0.0015 in) Cylinder gauge
hole of rear flange
(0.0005 -
101
0.0007 in)
n.
Piston
Backlash of ball joint
Backlash
Backlash 0.2 mm Lever type dial
assembly
between piston
161
0.1 mm
(0.008 in)
gauge
161/162
and shoe
162
(0.004 in)
p
.
Brake
Outer surface
Surface
No scratches,
Visual check
friction roughness uneven wear or
plate
115
12S
thermal seizure
Plate thickness
2.8 mm
Min. 2.5 mm
Slide calipers
(0.11 in)
(0.1 in) or cross
and visual
groove must
check
remain.
2
Measurement Procedures
Component measurements should be carried out in a
clean area, i.e. free from dust and contaminants, where
the temperature is 18 °C - 20 °C (64.4 °F - 71.6 °F).
After thorough cleaning arrange the components on a
working surface of JIS Class 2 or better.
Take measurements carefully and at least twice to verify
accuracy.
a
Measurement of spindle
2
reamer hole bore
diameters - use a 1 mm full scale dial gauge
C
and
a cylinder gauge
D
of measuring range 18 - 35
mm. Set up the dial gauge - insert the cylinder
gauge into a 19 mm standard ring gauge and zero
the dial scale.
Transfer the cylinder gauge to one of the reamer
holes and measure the diameter 3 mm down (point
A
) and then 10 mm down (point
B
). Rotate the
cylinder gauge two or three times at each point and
make a note of the minimum reading. For tolerance
see Wear Limits Table, item
1
(b).
Repeat for the other two reamer holes.
299610
10
3
C
C
A
A
B
B
D
D
Summary of Contents for JS70
Page 65: ......
Page 99: ......
Page 189: ...Section E Section E Hydraulics 9803 6020 Issue 1 33 4 33 4 Control Valves Control Valve 291360...
