Poulan 407139 To Replace Mower Blade Drive Belt See Fig, To Check and Adjust Brake See Fig

SERVICE AND ADJUSTMENTS

BOTTOM EDGE	00598	BOTTOM EDGE	• To raise front of mower, loosen nut “F” from trunnion
				on both front links. Tighten nut “E” on both front links
OF MOWER		OF MOWER
TO GROUND		TO GROUND		an equal number of turns. The two front links must
				remain equal in length.
“A”	GROUND LINE	“A”	• When distance “D”is 1/8" to 1/2" lower at front than rear,
				tighten nut “F” against trunnion on both front links.
	FIG. 25		•	Recheck side-to-side adjustment.

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

•Recheck measurements after adjusting.

SUSPENSION ARM

01553

LIFT LINK ADJUSTMENT NUT

FIG. 26

FRONT-TO-BACK ADJUSTMENT (See Figs. 27 and 28)

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.

01268

MANDREL

"D""D"

FIG. 27

BOTH FRONT LINKS MUST BE EQUAL IN LENGTH

01267

NUT "E"

NUT "F"

TRUNNION

FRONT LINKS

FIG. 28

23

TO REPLACE MOWER BLADE DRIVE BELT (See Fig. 29)

Park the tractor on level surface. Engage parking brake.

BELT REMOVAL -

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

•Remove screws from RH mandrel cover and remove cover.

•Remove screws from LH mandrel cover and remove cover.

•Work belt off both mandrel pulleys and idler pulleys.

•Pull belt away from mower.

BELT INSTALLATION -

•Install new belt in reverse order of removal. See belt routing decal located on right mandrel cover.

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

•Install left and right mandrel covers and tighten securely. Make sure belt is in mandrel pulley cover.

•Install mower (see "To install mower" in this section of this manual).

	LH MANDREL COVER
	RH MANDREL
	COVER
MANDREL	BELT
PULLEY
	MANDREL
	PULLEY
IDLER
PULLEY	IDLER PULLEY

FIG. 29

TO CHECK AND ADJUST BRAKE (See Fig. 30)

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

If tractor requires more than fi ve (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.

•Disengage transmission by placing freewheel control in “transmission disengaged” position. Pull freewheel control out and into the slot and release so it is held in the disengaged position.