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1-30 American-Lincoln
91 WS
SERVICE INSTRUCTIONS
DRIVE SYSTEM SERVICE INSTRUCTIONS - Cont.
TO REPLACE THE REVERSE BELT
1. Remove the two (2) inspection plugs on the right hand side of the machine which allows access to the
bearing plate on the differential shaft. Loosen and remove both bolts holding the bearing plate to the
machine.
2. Loosen the drive wheel chain idler and pull it to the top of the slot. Retighten it to keep it out of the way.
This allows you freedom to walk the chain off the differential.
3. At the rear of the machine, follow the main broom belt down to the idler. Disconnect the spring to release
the tension on that belt and remove the right hand side broom belt.
4. Remove the main broom belt.
5. At the front of the machine, place the differential plate with the bearing in it to the “UP” position. This allows
you clearance to feed the new belt in.
6. If the forward belt is still in good condition, you will need to start by removing it off the main drive shieve off
the differential.
7. Get both the forward and reverse belt off the differential shieve laying them to the left hand side.
8. Work the reverse belt over the differential shieve once you are on the front and off to the left hand side of the
shieve with both belts hanging loose around the differential.
9. Take the top portion of the belt and pick it up and the bottom portion of the belt and bring it to the “UP”
position. That will need to be worked around the main shieve coming off the motor in between the shieve
and the fixed bracket that holds the forward idler pulley. This clearance is very tight and you must be careful
not to cut the belt while you are working around that.
10. Work the belt around the forward and reverse main idler by putting it back over top of it.
11. Come back to the front of the machine and lower the differential bearing plate.
12. Reinstall the 2 bolts in that and reset the chain idler back to its position and retighten.
13. Move to the rear of the machine again and reinstall the main drive broom belt and the spring that was taken
off the right hand side broom belt.
14. Any fine adjustments should be able to be done with the linkage rod itself.