Hardi 3500 EXPLORER, Operator'S Manual

Page: 25 / 52

25
3500 / 4000 EXPLORER
Transmission shaft
Shield renewal
The replacement of defective shields is done as follows:
1 Push down on the universal cross cover and press in
the tabs with a screwdriver. Maintain pressure until
all three tabs are released.
Fig 58
2 Remove the nylon bearing and pull off the protection
Fig 59
3 Grease the protection tube bearing groove on the
inner yoke.
Fig 60
4 Slide on the shield tube and fit the bearings tabs into
the slots.
Fig 61
5 Slide the universal cross cover over the protection
tube and align the grease nipple with the grease
channel on the bearing. Press the universal cross
cover onto the tabs until they lock.
EC operating unit valve cone
Ball seat check / renewal, EC On / Off valve
If the main ON / OFF valve does not seal properly
(indicated by dripping nozzles when main ON / OFF
valve is closed), the ball and seat should be checked.
Remove the 2 bolts fixing the main ON / OFF pressure
valve unit to the bracket, unscrew the union nut A and
pull the valve away from the distribution valves.
Check the ball for sharp edges and scratches, and
check the ball seat for cracks and wear.
Replace if necessary. See
Replacement Parts.
1 Cautiously remove the Clip (A Fig 57) and pull out
Hose (B Fig 57) from the pressure equalisation
device.
2 When the housing is drained, there should be no
liquid flow through the pressure equalisation device.
If there is any leakage, valve cone (E Fig 57) must
be changed.
3 Remove Clip (C Fig 57) and lift the EC motor hous-
ing off the valve housing.
4 Then unscrew the screw (D Fig 57).
5 Replace the valve cone (E Fig 57).
6 Reassemble in reverse order.
Fig 56
Fig 57
Cone check / renewal, EC distribution valve
Periodically check the distribution valves for proper sealing.
Do this by running the sprayer with clean water and
open on / off valve and all distribution valves.