To Replace Motion Drive Belt; To Adjust Attachment Clutch - Poulan Pro 177937 Owner's Manual

SERVICE AND ADJUSTMENTS
• 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 L.H. mandrel pulley,
idler pulley, and center mandrel pulley as shown.
• Roll belt over R.H. mandrel pulley. Make sure belt is in
all grooves properly.
• Reconnect spring to bolt in mower housing and reinstall
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).
MOWER
L.H. MANDREL
BLADE
DRIVE BELT
SECONDARY
IDLER ARM
SPRING
SWAY BAR
BRACKET

TO ADJUST ATTACHMENT CLUTCH

(See Fig. 25)
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.
ROTOR
SLOT (3)
CLUTCH PLATE
NYLON LOCKNUT (3)
CENTER
MANDREL
R.H.
MANDREL
COVER
SCREW
IDLER
PULLEY
FIG. 24
.012"
BRAKE PLATE
FIG. 25

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.
• Remove mower (See "TO REMOVE MOWER" in this
section of this manual.)
BELT REMOVAL -
• Create slack in belt by removing retainer spring from
drive belt tension handle.
• Remove belt from all idler pulleys, transaxle pulley and
then from engine pulley.
BELT INSTALLATION -
• Install new belt around engine pulley first, then around
transaxle pulley and lastly into all the idler pulleys.
• Check to be sure belt is positioned correctly and is on
proper side of all belt keepers.
• Engage the drive belt tension handle and replace the
retainer spring.
• Reinstall mower.
RETAINER
SPRING
DRIVE BELT
TENSION HANDLE
ENGINE PULLEY
BELT KEEPER
BELT
KEEPER
V-IDLER
22
TRANSAXLE
PULLEY
FLAT IDLER
BELT
KEEPER
CLUTCHING
CLUTCHING
FLAT IDLER
IDLER
FIG. 26
BELT
KEEPER