Craftsman 917.28746 owner manual To Replace Mower Drive Belt, To Adjust Attachment Clutch

Loosen jam nut A first

NOTE: Each full turn of the adjustment nut will change mower height about 1/8".

•Recheck measurements, adjust if nec- essary until front tip of blade is 1/8" to 1/2" lower than the rear tip.

•Hold adjustment nut in position with wrench and tighten jam nut securely . against adjustment nut.

C-.

TO REPLACE MOWER DRIVE BELT

MOWER DRIVE BELT REMOVAL

1.Park tractor on a level surface. Engage parking brake. .

2.lower attachment lift lever to its lowest position.

3.Disengage belt tension rod (K) from 1\lock bracket (l).

a CAUTION: Belt tension rod is spring loaded. Have a firm grip on rod and re-

lease slowly. ..

4.Remove screws (P) fromRH and L.H. mandrel covers and remove covers

(0).

5.Remove any dirt or grass clippings which may have accumulated around mandrels and entire upper deck sur- face.

6.Remove belt from electric clutch pulley (M), both mandrel pulleys (R) and all idler pulleys (S).

MOWER DRIVE BELT INSTALLATION

1.Install belt around both mandrel pul-

leys (R) and around idler pulleys (S) as shown.

2.Install belt onto electric clutch pulley

(M).

IMPORTANT: Check belt for proper rout- ing in all mower pulley grooves.

3. Reassemble R.H. and L.H. mandrel covers (0). Securely tighten all screws.

4. Engage belt tension rod (K) on locking bracket (l).

A CAUTION: Belt tension rod is spring loaded. Have a tight grip on rod and en- gage slowly.

5.Raise attachment lift lever to highest position.

TO ADJUST ATTACHMENT CLUTCH

The electric clutch should provide years 'of service. The clutch has a built-in brake

that stops the pulley within 5 seconds. Eventually, the internal brake will wear which may cause the mower blades to not engage, or, to not stop as required.

Adjustments should be made by a Sears or other qualified service center.

1.Make sure attachment clutch and igni- tion switches are in "OFF" position.

2.Adjust the three nylon locknuts until space between clutch plate and rotor

measures .012" at all three slot loca- tions cut in the side of brake plate.

NOTE: After installing a new electric clutch, run tractor at full throttle and engage and disengage electric clutch 10 cycles to wear in clutch plate.

Rotor

TO REPLACE MOTION DRIVE BELT

Park the tractor on level surface. Engage parking brake. For ease of service there is a belt installation guide decal on bottom of left footrest.

BELT REMOVAl-

1. Remove mower (See "TO REMOVE MOWER" in this section of manual).

NOTE: Observe entire motion drive belt and position of all belt guides and keepers.

2.Disconnect clutch wire harness (A).

3.Remove anti-rotation link (B) on right side of tractor.

4.Remove belt from stationary idler (C) and clutching idler (D).

5.Remove belt from centerspan idler (E).

6.Pull belt slack toward rear of tractor. Carefully remove belt upwards from transmission input pulley and over cooling fan blades (F).

7.Remove belt downward from engine pulley and around electric clutch (G).

8.Slide belt toward rear of tractor; off the steering plate (H)' and remove from

"tractor.

BELT INSTALLATION -

1.Install new belt from tractor rear to front, over the steering plate (H) and

above clutch brake pedal shaft (J).

2.' Pull belt toward front of tractor and roll

belt around electric clutch and onto engine pulley (G).

3.Pull belt toward rear of tractor. Care- fully work belt down around transmis- sion cooling fan and onto the input pulley (F). Be sure belt is inside the belt keeper.

4.Install belt on centerspan idler (E).

5.Install belt through stationary idler (C) and clutching idler (D).

6.Reinstall anti-rotation link (B) on right side of tractor. Tighten securely.

7.Reconnect clutch hamess (A).

8.Make sure belt is in all pulley grooves and inside all belt guides and keepers.

9.Install mower (See "TO INSTAll MOWER" in this section of manual).

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