Troubleshooting & Repair
4.Using a 1/4” hex wrench, loosen and remove the two socket head cap screws holding the chipper knife in place (access the screw heads from the rear of the unit), and remove the chipper knife. See Figure 24 for location and temporary removal of an access plug that permits removal of the capscrews.
5.See Figure 25. Remove both knives through the opening in the front of the chipper/shredder, and sharpen equally or replace both blades to ensure proper balancing and correct chipping action.
•
•Chipper knives require a 30° bevel on the cutting edge (as shown in Figure 22) for efficient chipping action.
•Contact your local dealer or blade sharpening ser- vice if you prefer not to sharpen the blades your- self.
6.Clean the chipper knife mounting areas before rein- stalling the blades to ensure a flat mounting surface.
7.Install the new chipper knives using the two cap- screws, and two new lockwashers. Never reinstall chipper knives using used lockwashers, as used lock- washers may not hold the knives adequately.
8.Reinstall the access plug (Figure 24) removed earlier for capscrew access.
9.Reattach the shredder hopper and chipper cone using the hardware removed during disassembly. Replace any hardware that appears to be damaged or worn excessively.
10.Check all hardware for tightness and correct assem- bly before attempting to start your unit. Do not attempt to start the unit if extra hardware is left over after reassembly is complete. Check for proper chip- per knife assembly before proceeding.
11.Test your unit before attempting to use it to perform chipping. Start unit, and check for unusual noise or vibration.
•Shut unit off immediately if either situation occurs, and
•If assembly is correct, blades may not have been sharpened evenly, causing an imbalance. Remove blades and sharpen evenly.
•Recheck unit. If problem persists, contact your local dealer for assistance.
Access
Plug
*2445
Figure 24. Chipper Knife Access Plug
*2446
Figure 25. Removing Chipper Knife Through Front Opening
WARNING
Never use a malfunctioning unit to process material, even if it appears to be chipping materi- al adequately. An unexpected kick-back could occur, causing serious personal injury to you or bystanders.
Serious equipment damage could also result, voiding the warranty and requiring extensive repairs by a qualified service location.
Deflector Shield
The deflector shield must pivot freely at all times, or processed material could back up, clogging the unit and requiring disassembly to clear.
WARNING
Never use the unit unless the deflector shield is in place and operating properly. Material could be ejected out of the discharge chute with great force, injuring you or bystanders.
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