Walker H12, Operator'S Manual

Page: 15 / 52

8
Assembly
1. Remove the rear shaft support from the chute base lip and discard the existing bolt. Refer to Figure 1.2 to
locate the rear shaft support.
2. Place the plastic anti-friction insert over the chute base as shown in Figure 1.1. Only one position provides
a perfect fit.
Nipple (Facing Up)
Figure 1.1: Install Plastic Insert
3. Insert the 1-5/16 in. (33 mm) plastic bushing into the tube weldment, then insert the 1-11/16 in. (43 mm)
plastic bushing into the rear shaft support and place over the shaft on the rotation worm as shown in
Figure 1.2.
4. Install the rotation worm assembly into the tube weldment with the rear shaft support plate on the
underside of the chute base lip as shown in Figure 1.2.
Tube Weldment
1-11/16 in.
Bushing
Rear Shaft
Support
Rotation Worm
Figure 1.2: Install Rotation Worm Assembly
5. Install the chute over the plastic insert and secure with four retaining plates (as shown in Figure 1.3), using
two (2) 1/4 x 1/2 in. bolts, lock washers, and nuts in each of the three (3) standard retaining plates, and two
(2) 1/4 x 3/4 in. bolts, lock washers and nuts in the rear right retaining plate which also secures the rear
shaft support. Tighten all bolts to 10 ft-lb (13.6 N•m).
Front
Rear
1-5/16 in. Bushing