Sharpening Blades; Care And Cleaning - Jacobsen AR-522 Parts & Maintenance Manual

4.20 SHARPENING BLADES _____________________________________________________

1. Place a wooden block between the blade and mower
housing to stop the blade from moving.
!
The mower blades can develop sharp edges. Use
caution whenever servicing and handling.
2. When dressing or sharpening the blade, do not
follow the original pattern of grind as shown in (A).
Grind new cutting edges at an angle as shown in
(B).
If the maximum total loss of the blade reaches 1/2 in.,
(13 mm.), do not sharpen further. Replace blade.
!
Re-sharpening the blade beyond the allowable
1/2 in. (13 mm) may allow the blade tip to break
off and be thrown from the mower. Such an
incident can cause very serious injury to
bystanders and/or property damage.

4.21 CARE AND CLEANING _____________________________________________________

Wash the mower and implements after each use. Keep the
equipment clean.
NOTICE
Do not wash any portion of the equipment while it is hot.
Do not use high pressure spray or steam. Use cold water
and automotive cleaners.
1. Use compressed air to clean engine and radiator fins. A
special blow gun is available through your Jacobsen
Dealer.
2. Use only fresh water for cleaning your equipment.
NOTICE
Use of salt water or effluent water has been known to
encourage rust and corrosion of metal parts, resulting
in premature deterioration or failure. Damage of this
nature is not covered by the factory warranty.
3. Do not spray water directly at the instrument panel,
ignition switch, controller or any other electrical
components, or at bearing housings and seals.
WARNING
WARNING
3. Make sure an equal amount of material is removed
from both sides of blade to prevent having an
unbalanced blade. An unbalanced blade will cause
excessive vibration and may damage the mower.
4. Use a blade balancer to check the blade after
sharpening.
5. Torque center mounting screw holding blade to 75
to 90 ft. lb. (100 to 120 Nm).
A
B
4. Clean all plastic or rubber trim with a mild soap
solution or use commercially available vinyl/rubber
cleaners.
5. To maintain the original high luster of the fiberglass,
periodically wax with a good grade of One-Step
cleaner wax.
Repair damaged metal surfaces and use Jacobsen touch-up
paint. Wax the equipment for maximum paint protection.
!
CAUTION
Clean grass and debris from cutting units, drives,
muffler and engine to prevent fires.
!
WARNING
NEVER use your hands to clean cutting units. Use a
brush to remove grass clippings from blades. Blades are
extremely sharp and can cause serious injuries.
MAINTENANCE
Maximum
1/2 in. (13 mm)
Figure 4D
4
HR024
21