Norton Abrasives C6136 - Manual (Page 40)

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D. "V" Belts
Warning: Never make adjustments to belts or pulleys while
engine is running!
1. The best tension for a belt drive is the lowest tension at
which the belts will not slip under full load.
2. Simply take up the drive until the belts are snug in the
grooves. Run the drive for about 15 minutes to "seat" the
belts. Then impose the peak load. If the belts slips tighten
them until they no longer slip at peak load.
3. Remember too much tension shortens belt and
bearing life!
4. Check the belt tension frequently during the first day of
operation. Check the belt tension periodically thereafter and make any
necessary adjustments.
5. The two most common causes of misalignment are shown in the drawing.
A. The engine drive shaft and the blade shaft are not parallel. See Figure 1
B. The pulleys are not located properly on the shafts. See Figure 2 above
6. Use a Straight Edge to check alignment.
7. Line up the straight edge along the outside face of both pulleys as shown in
Figure 1.
8. Misalignment will show up as a gap between the pulley face and the straight
edge.
9. Make sure that the width of the outside land is equal on both pulleys.
E. Hydraulic Raise/Lower System
Raise and Lower Speeds of the Hydraulic System:
The Hydraulic System is set up at the factory to Raise from a fully lowered
position to the fully raised position in less than 5 seconds. The machine is
also set up to lower from a completely raised position to fully lowered 10 to
12 seconds.
The raising speed can be adjusted as follows:
FIGURE 1 FIGURE 2