Operator's Manual

22
MAINTENANCE
TORQUE SET SCREWS
After first 10 hours of operation, and every 50 hours
thereafter, torque set screws securing taper lock
bushings to driven pulleys to 22 ft./lbs. (30 N⋅m)
(2 each pulley) (Fig. 28).
Figure 28
1. Bushing set screws
1
After first 10 hours of operation, and every 50 hours
thereafter, torque set screws securing drive shafts to
gear box shafts to 37 ft. lbs. (50 N⋅m) (4 each side)
(Fig. 29).
Figure 29
1. Drive shaft set screws
1
1
TORQUE TAPER LOCK ASSEMBLY
When assembling the taper lock/pulley/flywheel
assembly, use the thick assembly washer that is
located in the frame under one of the bolts that holds
down the manual tube. Torque the bolt (Fig. 28) to
59-73 ft.lb. (80-100 N⋅m). Then, torque the pulley to
the taper lock. Refer to Torque Set Screws, page 22.
Once the taper lock/pulley/flywheel assembly has
been torqued, replace with the original hardware.
ADJUSTING PULLEY SCRAPERS
To prevent buildup of dirt, sand or other debris in pulley
grooves, make sure pulley scrapers are adjusted
correctly.
1. Loosen lock nut securing pulley scrapers to
mounting bracket (Fig. ).
Figure 30
1. Pulley scrapers
1
2. Slide pulley scrapers until they almost contact
sides of pulley goove(s).
3. Tighten nut to lock adjustment.
ADJUSTING BELT TENSION
Check belt tension after every few hours of operation.
Make sure belts are properly tensioned to assure
correct operation of unit, unnecessary belt wear and in
some conditions may cause poor hole quality.
1. Check tension by depressing belt upward at lower
midspan of pulleys with 30 lbs. (14 Kg) of force. Belt
should deflect .12-.19 in. (3-5 mm). If deflection is
incorrect proceed to next step. If correct continue
operation.
2. To adjust belt tension:
A. While holding bolt (Fig. 31), loosen nut securing
idler pulley (Fig. 32).
1. Idler pulley bolt
2. Tine arm bolt (R.H. and L.H. threads)
Figure 31
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2