Wheel Mounting Procedure; Inspecting Blades - Jacobsen AR522 Handbuch

7.18 WHEEL MOUNTING PROCEDURE ____________________________________________

!
WARNING
Make sure the mower is parked on a solid and level
surface. Never work on a mower that is supported
only by the jack. Always use jack stands.
If only the front or rear of the mower is raised, place
chocks in front of and behind the wheels that are not
raised.

7.19 INSPECTING BLADES ______________________________________________________

1. Every 50 hours of operation or whenever mower is
removed from mower, carefully examine the blades
to make sure they are in good operating condition.
Blades showing any bends (G), grooves (H) or
cracks (J) must be replaced.
!
CAUTION
Use care when checking blades to avoid pinching
hands and fingers between blade ends.
!
WARNING
Never attempt to straighten, weld, or repair a
damaged blade. Always replace a damaged blade.
2. Any of the above conditions can cause a piece of
the blade to break away and be hurled from the
mower, causing very serious injury to bystanders or
property damage.
3. A bent blade could have a microscopic crack (G)
that can grow and allow a piece of the blade to
break. Bent blades will also create vibration and
other stress on the machinery.
4. Dust or sand particles can wear a dangerous groove
in the blade (H) between the air vanes and the flat
portion of the blade that will rapidly grow and
produce a crack (J), permitting a piece of the vane
to break off.
1. Remove dirt, grease and oil from stud thread. Do not
lubricate threads.
2. Position wheel on hub and inspect to insure full
contact between mounting surface of wheel and hub
or brake drum.
3. Finger tighten all hardware, then torque hardware in
criss-cross order; always tighten nuts in the top
position.
4. Check and re-torque daily until torque is maintained
at 85-95 ft.lbs. (115-128 Nm).
G
MAINTENANCE
J
H
Figure 7C
7
HR025
39