Troubleshooting&
Repair
ii Rotor c:Spacer
J Hammer (2)
D . Flat Washer 318 E. Lock Washer 310
F.
Capscrew 
x 2” G. Capscrew 
1”
H.Triangular Hammer (2)
I. Bushing, Flanged
J. Cap Screw 
x 5/8” K. 5116 Lock Washer
L. Chipper Knife (2)
‘2733
Figure 29. Proper Hammer Assembly
15.Rotate the rotor to move the next hammer into position for servicing, and repeat step 14.
16.If chipping knives are to be inspected or serviced, go to the next section for instructions. If service is to be performed on shredding hammers only, proceed to the next step.
17.Reassemble the unit in the reverse sequence used to disassemble it in the preceding steps.
CHIPPING KNIVES
Chipping knives should be resharpened or replaced when tree limbs and branches begin to require extra force to feed into the chipper block.
To inspect and service the chipping knives, follow these steps: (If hammer service has just been performed, skip steps 1 - 2).
18.Check all hardware for tightness and correct assembly before attempting to start the unit. Do not attempt to start the unit if extra hardware or other parts are left over after reassembly has been completed. Identify the correct assembly location for any remaining parts using the illustrations in the manual, and install as required.
19.Start the unit and listen for unusual noise or vibra- tion. Stop the unit immediately if any problems are apparent, and check the assembly of all parts for proper positioning before starting the unit again.
AWARNING
Never use the unit for chipping or vacuumlshred- ding unless the discharge bag is attached, or the deflector elbow has been installed. .
Material could be ejected out of the discharge chute with great force, injuring you or bystanders.
Chipper knife cutting edges are sharp. Wear leather work gloves to protect your hands from injury
when removing or installing chipper knives.
““““““1
1.Turn the engine off, allow the rotor to stop completely, and disconnect the spark plug wire.
2.Remove the top and right side covers as shown in the preceding hammer replacement section.
3.Remove the discharge bag.
4.Remove the panel fastener and slotted hex head screws from the left cover (Figure 29).
5.Remove the left cover (Figure 30).
6.Remove the panel fasteners from the rear panel
( F i g u r e 3 1 ) .
7.Slide the rear panel down, and tilt the rear of the unit up slightly to allow the panel to slide free of the grooves in the discharge tube (Figure 33).
7a. Electric start units only: Disconnect and remove the battery.
NOTE: Always remove the negative terminal cab/e first and reinstall if last to reduce the risk of sparking and
7b. 8 H.P. units only: Remove top screws securing the fuel tank to the frame, and carefully move fuel tank forward and rest it on drive belt while chipper knife service is being performed.
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