Ariens 911134 - LM21SW - Manual (Page 19)

GB - 19
DRIVE BELT REPLACEMENT
(self-propelled models)
To remove drive belt:
1. Disconnect spark plug wire.
2. Set the right rear wheel to its lowest
cutting height, and the left rear wheel to
the third cutting height. This position
provides clearance between friction disc
and drive sheave.
3. Remove belt from the idler, then the
drive sheave, and finally, the engine
pulley (Figure 15).
4. Pull belt through opening under mower
pan and over blade.
5. Make sure the idler pulley turns and the
idler arm moves freely.
6. Reinstall drive belt in reverse order.
IMPORTANT: Be sure the belt seats in
sheave and pulley grooves with the idler
touching the back (flat) side of belt.
7. Adjust rear wheels to the same cutting
height.
ENGINE/BLADE CONTROL
ADJUSTMENT
(911134)
To adjust engine/blade control:
1. Loosen cable nuts away from bracket.
2. Squeeze z-bend bracket at engine end
of cable toward front of unit and hold in
place.
3. Pull cable down from bracket until there
is no slack in cable.
4. Tighten lower
cable nut to 1/8"
(3 mm) below
bracket.
Release z-bend
bracket.
Figure 15
1. Blade
2. Idler
3. Drive Sheave
4. Drive Belt 5. Engine Pulley
6. Bolt, Lock
Washer &
Flat Washer
5
6
1
2
3
4
OM1010
OM1040
No slack
OM1061
1/8”
(3 mm)
OM1020