Ariens LM21SC Owner's/Operator's Manual page 15

3. Sharpen both ends of blade at original
angle (25°), removing equal amounts of
material from each end to maintain
proper blade balance. New blades are
balanced to within 1.3 in. oz. at factory.
DO NOT grind around corner at tip of
blade. If cutting edge of blade cannot
be sharpened in a straight line to within
1/8 of an inch of its end, replace blade
with Ariens replacement blade only.
4. Install blade, lock washer and cap
screw. Blade must be secure and cap
screw torqued to 37.5 - 50 ft. lbs. (lock
washer should be fully compressed by
cap screw).
IMPORTANT: If mower is used under sandy
soil conditions, replace blades when air lifts
become eroded.
Mulching
Blade
4
3
2
1. Cutting Edge
2. Square Corner
3. Air Lift Erosion
4. Air Lift
5. Reverse Lift
5
4
1
2
OM0230
1
Standard Blade
Figure 8
CHECK DRIVE BELT
4
3
Check drive belt for wear or damage. Replace
belt if worn or damaged. See Service and
Adjustments.
CHECK ENGINE/BLADE
CONTROL
The engine/blade control must stop the engine
and blade within 3 seconds after the bail is
released. If the engine or blade continues to
run, adjust or repair control immediately. See
OM0240
Adjustments.
CHECK GRASS BAG
Check bag for wear or damage. Keep bag
clean and dry. Replace only with Ariens
original equipment replacement bag.
CHECK DRIVE CONTROL
Check operation of drive control. The drive
must disengage completely when the bail
handle is released. Adjust bail travel if
necessary. See Adjustments.
GENERAL LUBRICATION
Mower does not require any lubrication. Wheel
assemblies are designed for long life without
additional lubrication.
NOTE: The LM21SC does have lube fittings
on drive mount for use in commercial
applications. Lubricate as needed.
Swivel Lubrication
See Figure 10.
Apply Sten Mix Hi-Temp Grease or equivalent
to the lube fittings. Order P/N: 00036800 - 3
pack of 3 oz. cartridges.
GB - 15
3
1. Blade
2. Cap Screw, Lock
Washer & Flat Washer
3. Drive Belt
4. Idler
Figure 9
(swivel units)
1
2
OM0250