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B
C
A
Fig 44
11 Hoses and tubes
Check all hoses and tubes for possible damage and
proper attachment. Renew damaged hoses or tubes.
1000 Hours / Yearly Service
12 Wheel bearings
D
B
Fig 45
Check the condition of the bearings the following way:
1 Place stop wedges in front of and behind the left
hand wheel and jack up the right hand wheel.
2 Support the trailer with axle stands.
3 Remove the wheel.
4 Remove the hub cap (A Fig 45), cotter pin (B Fig 45)
and castle nut (C Fig 45).
5 Pull off wheel hub. Use a wheel puller if necessary.
6 Check roller bearings for discoloration and wear -
renew if worn or damaged.
7 Assemble the hub and bearings using a new sealing
ring (D Fig 45).
8 Fill the hub and bearings with fresh grease before
fitting to the shaft.
9 Fit castlelated nut. Rotate hub and tighten the
castelated nut until a slight rotation resistance is felt.
10 Loosen the castelated nut again until the first notch is
aligned with the cotter pin hole in the shaft.
NOTE! The shaft has a vertical and a horizontal
cotter pin hole. Use the one first aligned with the
notch when loosening the castlelated nut.
HARDI NAVIGATOR
11 Fit a new cotter pin and bend it.
12 Fill the hub cap with fresh grease and carefully press
it onto the hub.
13 Fit the wheel again and tighten the wheel nuts.
(Refer 50 Hours / Weekly Service (Page 27) for
torque wrench setting. Tighten all bolts to half the
specified torque first, then to the full specified torque.
14 Tighten again after 10 hours of work. Check the
torque every day until it is stabilised.
15 If you do not feel totally confident changing wheel
bearings, contact your HARDI dealer's workshop.
13 Transmission shaft
Change the protection tube nylon bearings as described
in Shield renewal (Page 30).
Occasional maintenance
Maintenance and renewal intervals for the next points
depend very much on conditions under which sprayer
operates, and are therefore impossible to specify.
363 or 463 pump
NOTE! It is recommended that if one or more
diaphragms and/or valves need replacing they all
should be replaced
E
C
A
Fig 46
Changing valves
1 Remove the valve covers (A Fig 46). Before chang-
ing the valves (B Fig 46 & B1 Fig 46) note their
orientation so they are replaced correctly.
2 The two white flap valves (B1 Fig 46) must be placed
in the valve openings as shown. It is recommended
to use new O-rings (C Fig 46) when changing or
checking the valves.
Changing diaphragms
1 With the valve covers removed as explained above,
remove the diaphragm bolts (D Fig 46).
A
D
B1
C
A = Valve Cover
B = Valves
B1 = White Flap Valves
C = O-rings
D = Diaphragm Bolt
E = Diaphragm
B
13
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