Poulan 424634 manual To Replace Mower Blade Drive Belt See Fig, To Check Brake, Belt Removal

SERVICE AND ADJUSTMENTS

SIDE-TO-SIDE ADJUSTMENT (See Figs. 15 and 16)

•Raise mower to its highest position.

•At the midpoint of both sides of mower, measure height from bottom edge of mower to ground. Distance “A” on both sides of mower should be the same or within 1/4" of each other.

•If adjustment is necessary, make adjustment on one side of mower only.

•To raise one side of mower, tighten lift link adjustment nut on that side.

•To lower one side of mower, loosen lift link adjustment nut on that side.

NOTE: Each full turn of adjustment nut will change mower height about 1/8".

•Recheck measurements after adjusting.

BOTTOM		BOTTOM
EDGE OF		EDGE OF
MOWER TO		MOWER TO
GROUND		GROUND
A	GROUND LINE	A

FIG. 15

LIFT LINK

ADJUSTMENT NUT SUSPENSION ARM

FIG. 16

FRONT-TO-BACK ADJUSTMENT (See Figs. 17 and 18)

IMPORTANT: DECK MUST BE LEVEL SIDE-TO-SIDE. IF THE FOLLOWING FRONT-TO-BACK ADJUSTMENT IS NECESSARY, BE SURE TO ADJUST BOTH FRONT LINKS EQUALLY SO MOWER WILL STAY LEVEL SIDE-TO-SIDE.

To obtain the best cutting results, the mower housing should be adjusted so that the front is approximately 1/8" to 1/2" lower than the rear when the mower is in its highest position.

Check adjustment on right side of tractor. Measure distance “D” directly in front and behind the mandrel at bottom edge of mower housing as shown.

•Before making any necessary adjustments, check that both front links are equal in length.

•If links are not equal in length, adjust one link to same length as other link.

•To lower front of mower loosen nut “E” on both front links an equal number of turns.

•When distance “D” is 1/8" to 1/2" lower at front than rear, tighten nuts “F” against trunnion on both front links.

•To raise front of mower, loosen nut “F” from trunnion on both front links. Tighten nut “E” on both front links an equal number of turns. The two front links must remain equal in length.

•When distance “D” is 1/8" to 1/2" lower at front than rear, tighten nut “F” against trunnion on both front links.

•Recheck side-to-side adjustment.

MANDREL

“D”	“D”
FIG. 17	17

BOTH FRONT LINKS MUST BE EQUAL IN LENGTH

NUT “F”	NUT “E”
TRUNNION
FRONT LINKS

FIG. 18

TO REPLACE MOWER BLADE DRIVE BELT (See Fig. 19)

The mower blade drive belt may be replaced without tools. Park the tractor on level surface. Engage parking brake.

BELT REMOVAL -

•Remove mower from tractor (See “TO REMOVE MOWER” in this section of manual).

•Work belt off both mandrel pulleys and idler pulleys.

•Pull belt away from mower.

BELT INSTALLATION -

•Work belt around both mandrel pulleys and idler pulleys.

•Make sure belt is in all pulley grooves and inside all belt guides.

•Install mower (See "TO INSTALL MOWER" in this section of manual).

IDLER PULLEYS

MANDREL

PULLEY

FIG. 19

TO CHECK BRAKE

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 serviced.

You may also check brake by:

1.Park tractor on a level, dry concrete or paved surface, depress clutch/brake pedal all the way down and en- gage parking brake.

2.Place gear shift lever in neutral (N) position.

The rear wheels must lock and skid when you try to manually push the tractor forward. If the rear wheels rotate, then the brakeneedstobeserviced.Contactaqualifiedservicecenter.