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Check Hydraulic Lines
After every 100 operating hours, check hydraulic lines and
hoses for leaks, loose fittings, kinked lines, loose
mounting supports, wear, weather and chemical
deterioration. Make necessary repairs before operating.
Note: Keep areas around hydraulic system clean from
grass and debris build up.
Warning
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury.
If hydraulic fluid is injected into the skin it
must be surgically removed within a few hours
by a doctor familiar with this type of injury.
Gangrene may result if this is not done.
Keep body and hands away from pin hole leaks
or nozzles that eject high pressure hydraulic
fluid.
Use cardboard or paper to find hydraulic leaks.
Safely relieve all pressure in the hydraulic
system before performing any work on the
hydraulic system.
Make sure all hydraulic fluid hoses and lines
are in good condition and all hydraulic
connections and fittings are tight before
applying pressure to hydraulic system.
Tire Pressure
Maintain the air pressure in the front and rear tires as
specified. Uneven tire pressure can cause uneven cut.
Check the pressure at the valve stem after every 50
operating hours or monthly, whichever occurs first
(Fig. 37). Check the tires when they are cold to get the
most accurate pressure reading.
Pressure: 13 psi (90 kPa) drive wheels and castor wheels.
Figure 37
1. Valve stem
Castor Pivot Bearing
Adjustment
Check after every 500 operating hours or at storage which
ever comes first.
1. Stop the engine, set the parking brake, remove the key
and disconnect the spark plug wire(s) from the spark
plug(s).
2. Remove dust cap from castor and tighten lock nut
(Fig. 38).
3. Tighten until spring washers are flat and then back off
a 1/4 turn to properly set the preload on the bearings
(Fig. 38).
Important
correctly as shown in Figure 38.
1. Spring washers
2. Lock nut
Wheel Hub Slotted Nut
Check after every 500 operating hours.
The slotted nut needs to be torqued to 125 ft-lbs
(169.5 N m).
1. Stop the engine, set the parking brake, remove the key
and disconnect the spark plug wire(s) from the spark
plug(s).
1
2. Remove cotter pin.
3. Torque slotted nut to 125 ft-lbs (169.5 N m) (Fig. 39).
4. Check the distance from bottom of slot in nut to inside
edge of hole. Two threads or less should be showing
(Fig. 39).
m–1872
5. If more than two threads are showing remove nut and
install washer between hub and nut (Fig. 39).
6. Torque the slotted nut to 125 ft-lbs (169.5 N m)
(Fig. 39).
7. Tighten nut until the next set of slots line up with the
hole in the shaft (Fig. 39).
35
Make sure spring washers are installed
3
2
1
Figure 38
3. Dust cap
m–4640
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