Poulan Pro 191984, Owner'S Manual

20

FIG. 19

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 

MOW ER” in this section of this manual).

•      Work belt off both mandrel pulleys and idler pulleys.
•      Pull belt away from mower. 

BELT INSTALLATION -
•      Install new belt in reverse order of removal.
•     Make sure belt is in all pulley grooves and in side all 

belt guides.

•      Install mower in reverse order of removal instructions.

SERVICE AND ADJUSTMENTS

"D"

"D"

MANDREL

FIG. 17

FIG. 18

BOTH FRONT LINKS MUST BE EQUAL IN LENGTH

SUSPENSION ARM

LIFT LINK ADJUSTMENT NUT

FIG. 16

NUT "E"

NUT "F"

FRONT LINKS

TRUN NION

IDLER PUL LEYS

MAN DREL PULLEYS

FIG. 15

“A”

“A”

BOTTOM EDGE 
OF MOWER
TO GROUND

BOTTOM EDGE 
OF MOWER
TO GROUND

GROUND LINE

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 bot tom 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 ad just ment 

nut on that side.

•      To lower one side of mower, loosen lift link ad just ment 

nut on that side.

NOTE

:  Three full turns of adjustment nut will change mower 

height about 1/8".
•      Recheck measurements after adjusting.

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 AD JUST BOTH FRONT LINKS  EQUAL LY  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 high-
est position.

Check adjustment on right side of tractor.  Measure dis tance 
“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.