Sharpening Blades - Jacobsen HR 9016 Turbo Parts & Maintenance Manual

4 MAINTENANCE
4.3

SHARPENING BLADES_____________________________________________________

1. Place a wooden block between the blade and mower
housing to stop the blade from moving. To remove
blade, turn screw holding blade counterclockwise
!
WARNING
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.
!
WARNING
Resharpening 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.
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. Attach blade to mower. Install blades so cutting
edges (C) face the direction of rotation as shown in
Figure 4C. Beveled cutting edge of blade must face
in toward deck housing.
Torque center mounting screw holding blade to 75
to 90 ft. lb. (100 to 120 Nm).
en-20
.
Left Side
raised to their transport position.
A
Maximum
1/2" (13 mm)
B
Bottom view of front deck
in its service position
C
C
Bottom view of side decks
HR024
Figure 4B
C
Right Side
HR015
Figure 4C