Ariens LM21-CARB Operator's Manual page 17

Hole
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 12).
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.
Pin
OM1800
Figure 11
5
4
1. Blade
2. Idler
3. Drive Sheave
4. Drive Belt
ENGINE/BLADE CONTROL
ADJUSTMENT
To adjust engine/blade control:
1. Loosen cable nuts away from bracket.
OM1010
2. Squeeze z-bend bracket at engine end
of cable toward front of unit and hold in
place.
GB - 17
6
3
5. Engine Pulley
6. Bolt, Lock
Washer &
Flat Washer
Figure 12
(911134, 144)
1
2