SERVICE AND ADJUSTMENTS

7, The chipper cutting blade (A in Figure 33) is mounted on the upper side of the flywheel assembly (B). AVOID CONTACT WITH THE BLADE AS IT tS EXTREMELY SHARP! To remove the blade, first remove the flywheel assembly as described below:

a.Rotate the flywheel assembly until the cutout (C) in the flywheel assembly is located below the chipper chute, To prevent the flywheel assembly from turning, place a 1/2" or thicker wood dowel down the chipper chute through the cutout. See Figure 33.

b, Using a box end 9/16" wrench, remove the

bolt (D) and concave washer (E) Carefully slide the assembly off the crankshaft Do not lose the key (F), or any shims (G), NOTE: Shims (if used) may be inside bore of flywheel assembly, See Figure 33

8.With a 3/16" hex key (Allen) wrench and 1/2" box wrench, remove the two Iocknuts (I) and screws (H) that

secure the blade to flywheel assembly., If necessary,

first clean out the socket holes in the screw heads with a sharp nail or awl, See Figure 33

9.Before installing a new or resharpened blade, thoroughly clean the area where the blade seats on the flywheel assembly (also clean the old blade, if it is being reused).

10.Position the blade on the upper side of the flywheel assembly, with the sharp edge of the blade on top, Install two new screws down through the blade and add new focknuts_ Use only factory-suppliedhardware. Do not use substitutes or equipment failure or personal injury could result. Tighten securely (torque to 240 lbs-in or 20 Ibs-ft)

11.Place key (F) in the engine crankshaft and re-install any shims (G). Align the keyway in the bore with the key on the crankshaft and slide the flywheel assembly into place

12.Place the concave washer (E [dished-in side of washer faces flywheel assembly]) on the mounting bolt

(D) and install the bolt in the crankshaft. Tighten securely (torque to 204 Ibs-in) Remove the wood dowel from the chipper chute

13.Replace the engine in the chassis, with the spark plug side facing the front (toward Inlet Cap)

14. Install the short safety interlock wire terminal and

the lockwasher on one of the mounting bolts and install it at the rear of the machine above the left side of the

blower opening. Connect the long interlock wire to the terminal above the muffler. Replace the other two mounting bolts and tighten all three bolts to 60-65 Ibs-in.

DO NOT OVERTIGHTEN BOLTS OR DAMAGE COULD RESULT TO HOUSING

15.install shredder screen in housing, insert screen rods, and secure with hair pin clips.

16.Replace the collection bag or blower deflector and reposition the handlebars in the correct operating position for vacuuming or blower operation°

Figure 33t Chipper cutting blade removal/replacement,

 

TORQUE

SPECIFICATIONS

BoltSize

Torque(Ibs-in)

 

Locationof Bolt(s)

5/16"-t4

60-65]Bs-in

1

Enginemountingplateto housing

 

40-55Ibs-in

2

Handlepivot bracket

 

40-55tbs-in

3

Upperhousingto lowerhousing

5/16"-24

240tbs-in

1. Chipperknifeto fanassembly.

3/8"-t6

180lbs-in

1

Wheelballs

 

 

2.

Handlebarsto pivotbrackets.

3/8"-16

276lbs-in

1.

Enginemountingplateto engine

3/8"-24

204lbs-in

1

Fanassemblyto engine

31

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Craftsman 987.799601 manual Service and Adjustments, Torque Specifications, BoltSize, Locationof Bolts, 60-65Bs-in
Page 30 Page 32

987.799601, 79960 specifications

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