Toro Workman HDX Auto Service Manual page 265

11. Install the thrust bearing onto the thrust button in the
cover plate (Fig. 27). Make sure that the tang on the side
of the thrust bearing is located toward the outer edge of
the cover plate. Use grease or petroleum jelly on the
back side of the thrust plate to keep the bearing in posi-
tion while assembling the cover plate assembly to the
gear case.
IMPORTANT: When installing the cover plate, make
sure that the tangs on the armature plate are proper-
ly aligned into the slots on the roller cage. Improper
assembly can cause damage to the armature plate
and will prevent 4WD from engaging.
12.Place the cover plate onto the gear case assembly.
Make sure to line up the tangs on the armature so they
will insert into the mating slots on the roller cage. Also,
make sure to align the cover plate bolt holes with the
threaded holes in the gear case.
13.Position plug clip to correct location on cover plate
and secure cover plate to gear case with five (5) flange
head screws. Torque screws from 14 to 17 ft−lbs (19 to
27 N−m).
14.Install the pinion gear and then the input cover (Fig.
28). Secure cover with four (4) flange head screws.
Torque screws from 14 to 17 ft−lbs (19 to 27 N−m).
15.Remove the oil fill plug and fill the unit with 6 oz. (180
ml.) of Mobil 424 hydraulic oil (or equivalent).
16.Adjust differential gear backlash as follows:
A. Locate backlash adjustment set screw inside
round boss on cover plate (Fig. 29).
B. Using a 5/32" allen wrench, turn the set screw
clockwise until it is snug (do not over−tighten the set
screw). At this point, you should not be able to turn
the pinion gear shaft.
C. Slowly turn the set screw counter−clockwise until
the pinion gear shaft can just be turned.
D. Continue to slowly turn the set screw counter−
clockwise until the pinion gear shaft can freely rotate
six (6) times (one (1) revolution of the ring gear) with-
out any tight spots. This proper backlash should be
achieved by the time that the set screw has been
turned counter−clockwise one (1) complete rotation.
Workman HDX Auto
1
1. Thrust bearing
1
1. Input cover
1. Cover plate
Page 8 − 21
2
Figure 27
2. Bearing tang
2
Figure 28
2. Pinion gear shaft
Figure 29
2. Set screw
Four Wheel Drive (Optional Kit)
2
1