8 - 19
Gearbox Inspection
All parts should be inspected for signs of wear or damage,
paying particular attention to the parts detailed below.
Section F Transmission
9803/6020
Section F
8 - 19
Issue 1
Track Gearbox
Part(s) Inspection Standard Permissible Measuring Corrective Action
Measurement Value Tolerance/ Tool
Area Condition
a. Hub 1 Pin bore area Surface No scratches, Visual check
roughness eccentric wear or
12S thermal seizure
b. Spindle 2 Bore diameter of ø 19 mm Max. ø 19.056 mm Cylinder gauge
reamer hole (0.748 in) (0.750 in)
c. RV gear 4 Flaking on the 0 Flaking 6.5 mm2 Visual check
RV gear 5 trochoid gear surface
Pitting on the 0 Flaking 6.5 mm2 Visual check
trochoid gear surface
Flaking on the needle 0 Flaking 6.5 mm2 Visual check
roller bearing 23
aperture.
d. Crankshaft Flaking on the 0 Flaking 6.5 mm2 Visual check
9 eccentric lobes.
Pitting on the 0 Flaking 6.5 mm2 Visual check
eccentric lobes.
e. Distance Wear on the seal 0 Wear 0.2 mm Contour/
piece 10 surface. (0.008 in) roughness
tester.
f. Floating Seal surface Surface No damage or Visual check
seal 31 roughness rust is
0.4S permissible
g . Thrust Wear of sliding Surface Wear 0.010 mm Contour/ Lap the slide surface
plate 153 surface for piston roughness (0.0004 in) roughness to correct slide
damage.
shoe 106. 0.4S tester (Correctable wear
0.020mm)
h. Cylinder Eccentric wear of Surface Wear 0.005 mm Contour/ Lap the slide surface
block 104 slide surface for roughness (0.0002 in) roughness to correct slide damage.
timing plate 109 0.4S tester (Correctable wear
0.020mm)
Cylinder boreø 17.004 mm Max. ø 17.014 mm Cylinder
diameter (0.069 in) (0.6698 in) gauge
j. Piston 105/ Outer diameter of ø 16.995 mm Min. ø 16.985 mm Indicator
piston shoe piston 105 (0.67 in) (0.668 in) micrometer
100
assembly Eccentric wear of Surface Wear 0.005 mm Contour/ Lap the slide surface
thrustplate sliding roughness (0.0002 in) roughness to correct slide damage.
surface of shoe 106 0.4S (Correctable wear 0.020
mm)
Backlash of ball joint 0.1 mm 0.2 mm Lever type dial
between piston 105 (0.004 in) (0.008 in) gauge
and shoe 106
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