McLaughlin McL-12HB ZIPPER, Components And Repair Manual

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should face toward the back of the machine.
15. Screw the spanner nut onto the end of the shaft.
The bevel on the nut should be toward the front of
the machine.
16. Tighten the spanner nut until there is no end to
end (axial) play in the shaft. The shaft will turn
with some resistance.
17. Using a screwdriver, bend tabs of spanner washer
into slots of the spanner nut. Bend all tabs that line
up (may be one or more than one).
18. Set the keys for each sprocket into the slot of the
motor shaft and the drive shaft.
19. Reassemble sprockets and chain (Ref. Step #2).
20. Install chain cover (Ref. Step #1).
STEP 4:
HYDRAULIC MOTOR REMOVAL AND REPLACE-
MENT
1. Remove chain cover (Ref. Step #1).
2. Remove small sprocket from machine (Ref. Step
#2).
3. Disconnect hoses at the hydraulic motor ports (Fig.
4). There will be a small amount of hydraulic oil in
the line. Allow the oil to drain into a rag. Clean up
any spillage.
4. Loosen the four (4) bolts and lockwashers that hold
the hydraulic motor (Fig. 2) in place.
5. While supporting the motor with one hand, remove
the bolts and set motor aside (Photo #10).
6. Inspect all components for dirt, cracks, wear or
damage.
7. TO BEGIN REASSEMBLY - set motor into pilot
hole of the machine frame.
8. While holding motor with one hand, start the bolts
into the threaded holes of the machine frame by
hand.
9. Tighten the two bolts closest to the top of the
machine first. (Photo #11).
10. Tighten the other two bolts.
11. Check all four bolts for tightness.
12. Reassemble small sprocket to motor shaft and add
chain (Ref. Step #2).
13. Install chain cover (Ref. Step #1).
STEP 5:
CYLINDER REMOVAL AND REPLACEMENT
1. Loosen the nuts of the dog plate cylinder brackets
(Fig. 3).
2. Screw the 1/2” square head bolts (Fig. 3) away
from the cylinder clevis.
3. Remove the hitch pin (R-pin, R-clip, Auger Clip)
from the dog plate clevis pin.
4. Remove the clevis pin (Photo #12).
5. Swing the dog plate away from the cylinder clevis.
6. Remove the hitch pin from the clevis pin at the
10
11
8.4.0
Fig. 2