To Replace Mower Blade Drive Belt; To Replace Mower Drive Belt - Poulan Pro 177271 Owner's Manual

Poulan pro lawn tractor owner's manual
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To obtain the best cutting results, the mower housing should
be adjusted so 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
"F" directly in front of 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 housing, loosen nut "G" on both
front links an equal number of turns.
When distance "F" is 1/8" to 1/2" lower at front than rear,
tighten nut "H" against trunnion on both front links.
To raise front of mower housing, loosen nut "H" from
trunnion on both front links. Tighten nut "G" on both front
links an equal number of turns.
When distance "F" is 1/8" to 1/2" lower at front than rear,
tighten nut "H" against trunnion on both front links.
NOTE: Each full turn of nut "G" will change dim. "F" by
approximately 3/8".
Recheck side-to-side adjustment.
GROUND LINE
"F"
BOTH FRONT LINKS SHOULD BE EQUAL IN LENGTH
NUT "H"
FRONT LINKS

TO REPLACE MOWER DRIVE BELT

MOWER DRIVE BELT REMOVAL (See Fig. 24) -
Park tractor on a level surface. Engage parking brake.
Remove screws from L.H. mandrel cover and remove
cover.
Roll belt over the top of L.H. mandrel pulley.
Remove belt from electric clutch pulley.
Remove belt from idler pulleys.
SERVICE AND ADJUSTMENTS
"F"
FIG. 22
NUT "G"
TRUNNION
FIG. 23
Remove any dirt or grass clippings which may have
accumulated around mandrels and entire upper deck
surface.
Check primary idler arm and two idlers to see that they
rotate freely.
Be sure spring is securely hooked to primary idler arm
and bolt in mower housing.
MOWER DRIVE BELT INSTALLATION (See Fig. 24) -
Install belt in both idlers. Make sure belt is in both belt
keepers at the idlers as shown.
Install new belt onto electric clutch pulley.
Roll belt into upper groove of L.H. mandrel pulley.
Carefully check belt routing making sure belt is in the
grooves correctly and inside belt keepers.
Reassemble L.H. mandrel cover.
L.H.
SCREWS
MANDREL
COVER
L.H.
MANDREL
PRIMARY
IDLER ARM
BELT
KEEPERS

TO REPLACE MOWER BLADE DRIVE BELT

(See Fig. 25)
Park the tractor on level surface. Engage parking brake.
Remove mower drive belt (See "TO REPLACE MOWER
DRIVE BELT" in this section of this manual).
Remove mower (See "TO REMOVE MOWER" in this
section of this manual).
Remove screws from R.H. mandrel cover and remove
cover. Unhook spring from bolt on mower housing.
Carefully roll belt off R.H. mandrel pulley.
Remove belt from center mandrel pulley, idler pulley,
and L.H. mandrel pulley.
Remove any dirt or grass which may have accumulated
around mandrels and entire upper deck surface.
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.
21
IDLER
PULLEYS
FIG. 24
ELECTRIC
CLUTCH
PULLEY
MOWER
DRIVE
BELT

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