Operation and maintenance manual

Section 150-0020
SM 2149 5-02
13
SM - 1201
Centre Axle - Differential Drive Head
(30A) already on helical pinion (31).
9. Select shim pack (19) of 0.762 mm (0.030 in)
thickness and position in helical gear housing (26).
10. Place retainer plate (18) on shims and install eight
standard type capscrews. Tighten capscrews to a
torque of 64 - 72 Nm (47 - 53 lbf ft).
11. Shock load helical pinion bearings using a hide
faced mallet.
12. Install helical gear tool (See Special Tools) into
helical pinion (31) bore (See Fig. 17).
13. Tighten locknut on pinion tool clockwise to secure
tool in pinion bore. (See Fig. 18).
14. Mount dial indicator on helical gear housing (26),
with pointer positioned on end face of helical pinion
(31). Pull helical pinion up and down using adjusting
tool and note dial indicator movement (see Fig. 19).
Correct end float is between 0.051 - 0.102 mm
(0.002 - 0.004 in).
To increase end float, add shims.
To decrease end float, subtract shims.
Add or subtract shims as required until correct end
float is obtained.
15. Remove dial indicator and adjusting tool.
16. Remove standard capscrews installed at Step 10.
17. Fit new ‘Eslok’ capscrews (121) and evenly tighten
to a torque of 63 - 72 Nm (47 - 53 lbf ft) whilst rotating
helical pinion (31).
3rd Differential Unit Assembly
Note: Before assembly, check that the two cage
halves (12 & 17) are a matched set. If one half is
replaced, they must be replaced as a pair.
1. Place inner cage half (17) on work bench with open
end uppermost and install thrust washer (16) and
wheel (15).
2. Install bushes (123), pinions (124) and thrust
washers (125) on trunnion (122).
3. Place trunnion assembly in position on wheel (15).
Fig. 17 - Installing Helical Gear Tool
SM - 1202
SM - 1203
Fig. 18 - Securing Tool No. 15269088
Fig. 19 - Measuring Helical Pinion Movement
HELICAL
PINION
13/16 in A/F
SPANNER
DIAL
INDICATOR
PULL AND PUSH
HELICAL PINION
ALONG ITS C/L
HELICAL
GEAR TOOL