Service And Adjustments - Husqvarna LT138 Owner's Manual

SERVICE AND ADJUSTMENTS

TO LEVEL MOWER HOUSING
Adjust the mower while tractor is parked on level ground
or driveway. Make sure tires are properly infl ated (See
"PROD UCT SPECIFICATIONS" section of this manual). If
tires are over or underinfl ated, you will not properly adjust
your mower.
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.
BOTTOM EDGE OF
MOWER
TO GROUND
"A"
GROUND LINE
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.
BOTTOM EDGE
OF MOWER
TO GROUND
"A"
FIG. 16
SUSPENSION ARM
LIFT LINK
ADJUSTMENT
NUT
FIG. 17
• 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.
"D"
BOTH FRONT LINKS MUST BE EQUAL IN LENGTH
NUT "F"
TRUNNION
FRONT LINKS
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 -
• Place attachment clutch in "DIS EN GAGED" po si tion.
• Move at tach ment lift lever forward to lower mower to
its lowest position.
• Roll belt off engine pulley.
• Disconnect R.H. suspension arm from rear deck brack et
by removing retainer spring.
• Work belt off both mandrel pulleys and idler pulleys.
• Pull belt away from mower.
BELT INSTALLATION -
• Work new belt around both mandrel pulleys and idler
pulleys.
• Install new belt into engine pulley grove.
• Reconnect R.H. suspension arm and secure with re-
tain er spring.
• Make sure belt is in all pulley grooves and inside all
belt guides.
20
MANDREL
"D"
FIG. 18
NUT "E"
FIG. 19