H24d
Maintenance Instructions
Checking and Servicing
65
Drive Belts
Raise the body and inspect the condition of the
four (4) drive belts
after every 25 hours
of opera
-
tion–engine/PTO drive (3), ground drive (1). Also,
remove the belt cover on the mower deck and
check the blade drive belt. If the belts show
signs
of cracking or deteriorating,
the belts should be
replaced.
Refer to
Drive Belts on page 67
.
Fuel Lines and Clamps
Every year,
inspect the fuel supply lines from the
tank(s) to engine for deterioration or damage.
Also, inspect the fuel line
clamps for tightness.
Good preventive maintenance calls for complete
replacement
of fuel lines and clamps
every two
(2) years.
NOTE:
This procedure is of special importance for
the diesel engine due to poor performance when
air is injected with the fuel.
Radiator Hoses and Clamps
Inspect the radiator hoses
every 200 hours
for
deterioration or damage. Also check the tightness
of the hose clamps. Good preventive maintenance
calls for complete
replacement
of the radiator
hoses and clamps
every two (2) years.
Transmission Control Setting
On a
yearly
interval or when an out-of-adjustment
condition is observed, check the transmission
control for proper function as follows:
Neutral-Park
With the mower parked on level ground, start and
run the engine, first at idle and then normal operat-
ing speeds. With the FSC in the
NEUTRAL-PARK
position, there should be no movement of either
drive tire. If the tire(s) are “creeping” forward or
reverse, refer to
Adjustments for Transmission
Control
Step 3 - Neutral Function Adjustment on
page 74.
Straight Ground Tracking
Check for straight ground track by driving on a
smooth, level surface with hands off the steering
levers. Set the FSC at different speeds and
observe if the mower moves in a straight line (use
a cement joint or other line on the ground for refer-
ence). If the machine is drifting to the right or left,
refer to
Adjustments for Transmission Control Step
5 - Straight Tracking Adjustment on page 76.
Blade Brake Action
WARNING
It is important to check and maintain
blade brake action for safe operation of
the machine.
Check the function of the cutter blade brake by
engaging the blade clutch (PTO), operating the
engine at full throttle, then disengaging the clutch
and measuring how quickly the blades stop.
Watch the rotation of the blade drive shaft as a
visual indi cation that movement has stopped. If
the brake is
working properly, all rotation will
stop five (5) seconds after disengagement
of
the clutch. If the brake system malfunctions—
blades do not stop in five (5) seconds—adjust or
repair the brake before operating the mower.
Refer to
Adjustments for Clutch Disengagement/
Brake Action Step 2 - Blade Brake Band Adjust-
ment on page 80
.
PTO U-Joints
The PTO U-joints should be inspected
yearly
for
looseness and wear. If either is noticed, the
respective shaft or tube should be replaced. A
worn U-joint can cause vibration and extensive
damage to the PTO and the whole machine.
