Wheel Mounting Procedure; Inspecting Blades - Jacobsen AR-522 Parts & Maintenance Manual

4 MAINTENANCE

4.18 WHEEL MOUNTING PROCEDURE ____________________________________________

!
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.

4.19 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.
!
Use care when checking blades to avoid pinching
hands and fingers between blade ends.
!
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.
20
WARNING
CAUTION
WARNING
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 retorque daily until torque is maintained at
85-95 ft.lbs. (115-128 Nm).
G
J
H
Figure 4C
HR025