Poulan 178493 owner manual To Adjust Attachment Clutch See Fig, To Adjust Brake See Fig

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).

L.H. MANDREL	MOWER
	BLADE
	DRIVE BELT	CENTER
		MANDREL
		R.H.
		MANDREL
		COVER
		SCREW
SECONDARY
IDLER ARM
SPRING
SWAY BAR	IDLER
BRACKET	PULLEY

FIG. 24

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.

TO ADJUST BRAKE (See Fig. 26)

Your tractor is equipped with an adjustable brake system which is mounted on the side of the transaxle.

If tractor requires more than six (6) feet stopping distance at high speed in highest gear on a level dry concrete or paved surface, then brake must be adjusted.

•Depress clutch/brake pedal and engage parking brake.

•Measure distance between brake operating arm and nut “A” on brake rod.

•If distance is other than 1-1/2", loosen jam nut and turn nut “A” until distance becomes 1-1/2". 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 six (6) feet in highest gear, further maintenance is necessary. Contact your nearest au- thorized service center/department.

WITH PARKING BRAKE “ENGAGED”
	NUT
	“A”
1-1/2"	JAM NUT
	OPERATING
	ARM

FIG. 26

TO REPLACE MOTION DRIVE BELT (See Fig. 27)

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 -

•Engage parking brake (creates slack in belt).

•Remove belt from clutching and fan idler pulleys.

	ROTOR		• Loosen belt keeper above transaxle pulley.
			• Remove belt from transaxle pulley.
			• Remove belt from engine pulley and front V-idler pulley.
SLOT (3)	CLUTCH PLATE	.012"	• Pull belt out of all belt keepers and remove from tractor.
			BELT INSTALLATION -
			• Place V part of belt into grooves on engine pulley and
			front V-idler, making sure to route belt inside of all belt
			keepers.
NYLON LOCKNUT (3)		BRAKE PLATE	• Route belt on right side, coming from V-idler, towards
			back of tractor, above midspan belt keeper and to top of
	FIG. 25		transaxle pulley.
			22