Husqvarna 917.27909 - Manual (Page 23)

SERVICE AND ADJUSTMENTS
TO ADJUST ATTACHMENT CLUTCH
(See Fig. 24)
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 your nearest
authorized service center/department.
• Make sure attachment clutch and ignition switches are
in "OFF” position.
• Adjust the three nylon locknuts until space between
clutch plate and rotor measures .012" at all three slot
locations cut in 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.
TO CHECK AND ADJUST BRAKE
(See Fig. 25)
Your tractor is equipped with an adjustable brake system
which is mounted on the right side of the transaxle.
If tractor requires more than five (5) feet to stop at highest
speed in highest gear on a level, dry concrete or paved
surface, then brake must be checked and adjusted.
TO CHECK BRAKE
•
Park tractor on a level, dry concrete or paved surface,
depress clutch/brake pedal all the way down and en­
gage parking brake.
• Place gear shift lever in neutral (N) position.
The rear wheels must lock and skid whenyou try to manually
push the tractor forward. If the rear wheels rotate, the brake
needs to be adjusted or the pads need to be replaced,
TO ADJUST BRAKE
•
Depress clutch/brake pedal all the way down and en­
gage parking brake.
• Measure distance between brake operating arm and
nut "A” on brake rod.
• If distance is other than 1 -3/4", loosen jam nut and turn
nut “A” until distance becomes 1-3/4". Retighten jam
nut against nut “A”,
• Road test tractor for proper stopping distance as stated
above. Readjust if necessary. If stopping distance is
still greater than five (5) feet in highest gear, further
maintenance is necessary. Replace brake pads or
contact a qualified service center.
TO REPLACE MOTION DRIVE BELT
(See Fig. 26)
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. It is not necessary to remove
mower.
BELT REMOVAL -
Engage parking brake (creates slack in belt).
Remove mower drive belt from electric clutch pulley
only (See “TO REPLACE MOWER DRIVE BELT” in
this section of this manual).
Roll motion drive belt off transaxle pulley.
Roll belt off clutching idler pulleys, then off engine pul­
ley and front V-idler pulley.
Pull belt out of all belt keepers.
BELT INSTALLATION -
Place V part of belt into grooves on engine pulley and
front V-idler, making sure to route belt inside of belt
keepers.
Put belt coming from V-idler above midspan belt keeper,
then onto clutching idler pulleys as shown.
Make sure V part of belt engages V-idler.
Place belt around transaxle pulley, beginning at top.
V part of belt should engage transaxle pulley.
Place long lower section of belt through loop in midspan
belt keeper.
Check to be sure belt is on proper side of all belt keep­
ers.
Reinstall mower drive belt onto electric clutch pulley.
IMPORTANT; CHECK BRAKE ADJUSTMENT.
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