Ryobi 197788 - Manual (Page 20)

20
FIG. 20
TO REPLACE MOWER BLADE DRIVE BELT
(See Fig. 20)
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 instruc-
tions.
SERVICE AND ADJUSTMENTS
"D" "D"
MANDREL
FIG. 18
FIG. 19
BOTH FRONT LINKS MUST BE EQUAL IN LENGTH
SUSPENSION ARM
LIFT LINK ADJUSTMENT NUT
FIG. 17
NUT "E" NUT "F"
FRONT LINKS
TRUN NION
IDLER
PUL LEYS MANDREL
PULLEY
MAN DREL
PULLEY
FIG. 16
“A” “A”
BOTTOM EDGE OF
MOWER
TO GROUND BOTTOM EDGE
OF MOWER
TO GROUND
GROUND LINE
SIDE-TO-SIDE ADJUSTMENT (See Figs. 16 and 17)
• 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. 18 and 19)
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.