Sharpening Blades; Care And Cleaning - Jacobsen AR-5 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 blade tip 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 tractor and implements after each use. Keep the
equipment clean.
Note: 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 Jacobsen Dealer.
2. Use only fresh water for cleaning your equipment.
Note: 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" (13 mm)
Figure 4D
4
HR024
GB-21