Craftsman 28990 Operation Manual - Page 26

R.H. and L.H. mandrel

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NOTE: Each full turn of the adjustment nut will change mower height about 1/8". Recheck measurements, adjust if necessary 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 release 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). 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. 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 routing 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 engage slowly. 5. Raise attachment lift lever to highest position. 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 transmission cooling fan and onto the input pulley (F). Be sure belt is inside the belt keeper. 26

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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.
26