DR Power 16.50 Pro - Manual (Page 38)

34 16.50 PRO DR ® RAPID-FEED™ CHIPPER
NOTE: Prior to retightening the Bushing Retaining Bolts, move the Sheave out approximately 1/8" from the
straightedge to allow for compression of the Bushing during the tightening process.
g) Slowly tighten the Bushing Retaining Bolts evenly and alternately (1/4 to 1/2 turn) starting with the
Bolt farthest from the Bushing Saw Slot.
h) Recheck the alignment after tightening the Bolts, and then retighten the Sheave Bushing Bolt.
NOTE: Make sure that the Belt or Sheave is not hitting the Hopper.
5. Tighten the Engine Bolts (Figure 29)
6. Place a Straightedge on the Belt (over the Clutch and
Sheave) and push down firmly on the Belt to measure
the deflection from the Straightedge to the Belt with a
tape measure (Figure 32).
7. The measurement should be approximately 3/8".
8. If the measurement is not correct, loosen the Engine
Bolts and tighten or loosen the Adjusting Nut as
needed (Figure 29).
9. Repeat steps 5 through 8 until the proper Belt tension
is achieved.
10. When the Belt is properly tensioned, double check that
the four Engine Bolts are completely tightened.
11. Reinstall the Belt Guard Bracket and the Belt Guard.
12. Reinstall the eight Bolts, Lock Washers and Flat Washers using a 1/2" Wrench (Figures 26 and 27).
NOTE: Check and re-tighten the Drive Belt, if necessary, after an initial break-in period of one (1) hour.
Removing, Replacing and Adjusting the Chipper Knife and Wear Plate
ROUTINELY CHECK THE CHIPPER KNIFE FOR SHARPNESS. USING A DULL KNIFE WILL DECREASE
PERFORMANCE AND CAUSE EXCESSIVE VIBRATION THAT WILL CAUSE DAMAGE TO THE DR RAPID-
FEED CHIPPER.
ROUTINELY CHECK THE WEAR PLATE FOR A SHARP SQUARE EDGE. USING A ROUNDED OR
CHIPPED WEAR PLATE WILL DECREASE PERFORMANCE AND CAUSE EXCESSIVE VIBRATION THAT
WILL CAUSE DAMAGE TO THE DR RAPID-FEED CHIPPER.
SHUT DOWN THE ENGINE, WAIT FOR ALL MOVING PARTS TO COME TO A COMPLETE STOP, REMOVE
SPARK PLUG WIRE, DISCONNECT THE NEGATIVE BATTERY CABLE, THEN WAIT 5 MINUTES BEFORE
PERFORMING ANY MAINTENANCE PROCEDURE OR INSPECTION ON THE CHIPPER.
Straightedge
Figure 32
Belt
3/8"
Clutch
(mounted on
Engine
Crankshaft)