To Replace Mower Blade Drive Belt; To Adjust Attachment Clutch; To Adjust Brake - Craftsman 917.255980 Owner's Manual

RV CE AND ADJUSTMENTS
TO REPLACE MOWER BLADE DRIVE BELT
(See Fig. 28) ....
Park the tractor on level surface. Engage parking brake+
• Remove mowerdrive belt (See'70 REPLACE MOWER
DRIVE BELT" in this section of this manual).
• Remove mower (See "TO REMOVE MOWER" in this
section of this manual).
• Remove four screws from Roll+ mandrel cover and
remove cover° Unhook spring from bolt on mower
housing+
• Carefully roll belt off R.H. mandrel puIley+
° Remove belt from center mandrel pulley, idler pulley,
and L+H. mandrel pulley°
° Remove any dirt or grass which may have accumu-
lated around mandrels and entire upper deck surface.
• Check secondary idler arm and idler to see that they
rotate freely°
° Be sure spring is hooked in secondary idler arm and
sway-bar bracket.
• Install new belt in lower groove of Loll+mandrel pulley,
idler pulIey, and center mandrel pulley as shown.
• RollbeltoverR.H. mandrelpulley° Make sure belt is in
all grooves properly.
° Reconnect spring to bolt in mower housing and rein-
stall R.H+mandrel cover.
° Reinstall mower to tractor (See "INSTALL MOWER
AND DRIVE BELT" in the Assembly section of this
manual).
° Reassemble mower drive belt (See "TO REPLACE
MOWER DRIVE BELT" in this section of this manual).
L.H. MOWER BLADE
MANDREL\\ DRIVE B CENTER
MANDREL
MANDREL
COVER
SECONDARY
IDLER ARM
SWAY-BAR IDLER
BRACKET PULLEY
FIG, 28
TO ADJUST ATTACHMENT CLUTCH
(See Fig. 29)
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 byyour nearest
authorized service center!department+
o Make sure attachment clutch and ignition switches ar+e
in "OFF" position.
° Adjust the three nylon Iocknuts until space between
clutch plate and rotor measures .012" at all three stot
locations cut inside 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.
21
NYLON LOCKNUT (3)
FIG. 29
BRAKE PLATE
TO ADJUST BRAKE (See Fig, 30)
Your tractor is equipped with an adjustable brake system
which is mounted on the left side of the transaxle.
If tractor requires more than six (6) feet stopping distance
at high speed in highest gear, then brake must be adjusted°
IMPORTANT" DO NOT OVER TIGHTEN BRAKE. WHEN
DEPRESSING CLUTCH BRAKE PEDAL, THE MOTION
DRIVE BELT MUST STOP MOV1NG (DECLUTCH FROM
ENGINE PULLEY) BEFORE BRAKE ENGAGES.
IMPROPER ADJUSTMENT WILL CAUSE HARD SHIFTING
AND EXCESSIVE WEAR TO BRAKE LINING°
° Park and turn off the tractor on a level surface° Place
gear shift lever in neutral (N) position. Disengage
parking brake and be sure tractor does not roll in either
direction.
° Lower mower deck (if installed on tractor').
° Snap outaccess hole coveron leftside of tractor above
footrest.
° Loosen jam nut at clevis which will allow brake rodto be
rotated°
= With pliers, from underside of frame, unscrew brake
rod from clevis four (4) to six (6) full turns.
° Starttractorwithgearshiftleverin neutral(N) position.
° Slowly depress clutch/brake pedal to the point where
the motion drive belt stops moving. Hold clutch/brake
pedal in this position and engage parking brake° If belt
begins to move after engaging parking brake, reset
parkingbrake by depressing clutch/brake pedal slightly
to next notch on parking brake.
° Stop engine_ Screw brake rod back into clevis until
clevis pin is against rear edge of slot in brake arm, Do
not over tighten (see "IMPORTANT" above).
° Tighten jam nut against clevis°
° Replace access hole cover.
° Road test tractor for proper stopping distance and
declutching as stated above° Readjust ifnecessary. If
proper adjustment cannot be attained, further mainte+
nance is necessary. Contact your nearest authorized
service center!department°
FIG. 30