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Workman MD/MDX Page 7 -- 13 Chassis
Disassembly (Fig. 5)
IMPORTANT: D o not reuse flange head screw with
patch lock after it has been removed.
1. Remove flange head screw with patch lock (item 9)
and stepped washer (item 8) from Pitman arm. Discard
flange head screw.
2. Remove flange head screw with patch lock (item 13)
and flat washer (item 12) from pinion gear shaft. Discard
flange head screw.
3. Remove three (3) hex washer head screws (item 2)
securing the housing cover and gasket to the steering
housing. Remove cover and gasket from the housing.
Replace gasket if damaged.
4. Inspect gears. Sector and pinion gear teeth must be
free of damage that prevents them of free movement.
5. Remove pinion gear (item 17) from the housing.
IMPORTANT: Matchmark pitman arm shaft and sec-
tor gear.Their positionis critical during reassembly.
6. Separate Pitman arm (item 19) from the sector gear
(item 4) and steering housing and remove from the
housing.
7. Inspect bearings. Bearings must spin smoothly and
be free of damage. Press bearings and spacer out of
housing if necessary.
8. Inspect seals. Seals must be free of rips and tears.
Replace seals if necessary.
Assembly (Fig. 5)
IMPORTANT: Always replace ball bearings as a set.
1. If ball bearings were removed:
A. Press new bearing into housing from the inside
first.
B. Turn housing over. Insert spacer and press new
bearing into housing.
2. If seals were removed, press new seals into housing.
Seal lips should be facing up.
3. Place flat washer (item 5) onto shaft of the Pitman
arm (item 19). Insert shaft into steering housing.
IMPORTANT: The position of the Pitman arm and
sector gear is critical during assembly. If either or
both of t hese parts is replaced, make sure their
alignment matches the matchmark position of the
original gear and arm.
4. Position sector gear (item 4) onto the spline of the
Pitman arm shaft.
IMPORTANT: Make sure sector gear is centered to
the pinion gear.
5. Insert pinion gear (item 17) into the small bearing in
the steering housing.
6. Fill steering housing with number 2 general purpose
grease. Make sure all gear teeth on the sector and pin-
ion gears are covered with grease.
7. Place gasket and steering housing cover onto the
housing. Secure cover to housing with three (3) hex
washer head screws (item 2). Torque screws from 90 to
110 in--lb (10.2 to 12.4 N--m).
IMPORTANT: Flange head screws with patch lock
(items 9 and 13) should be replaced whenever they
are removed.
8. Secure stepped washer and flange head screw with
patch lock (item 9) to the Pitman arm (item 8). Make sure
to position stepped washer as shown in Figure 5.Torque
screw from 27 to 33 ft--lb (37 to 44 N--m).
9. Secure flat washer (item 12) and flange head screw
with patch lock (item 13) to the pinion gear shaft. Torque
screw from 175 to 225 in--lb (20 to 25 N--m).
10.After assembly is completed, make sure that pitman
arm rotates freely from stop to stop without binding.
Chassis