To Replace Mower Drive Belt; To Replace Motion Drive Belt; Mower Drive Belt Removal And Installation; Belt Installation - Craftsman 917.28990 Operator's Manual

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.
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
ock bracket (L).
CAUTION: Belt tension rod is spring
loaded. Have a firm grip on rod and re-
lease slowly.
4. Remove screws (P) from R.H. and LH.
mandrel covers and remove covers (Q).
5. Remove any dirt or grass clippings
which may have accumulated around
mandrels and entire upper deck surface.
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 pulleys
(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 (Q). Securely tighten all screws.
4. Engage belt tension rod (K) on locking
bracket (L).
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 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. Putt 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.
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