Cone Check/Renewal For Pressure Regulation Valve; Cone Check/Renewal For Evc Distribution Valve; Level Indicator Adjustment - Hardi NAVIGATOR 4000 Instruction Book

6 - Maintenance

Cone check/renewal for pressure regulation valve

If it becomes difficult to build up sufficient pressure or if pressure
fluctuations occur, it may be necessary to renew cone and cylinder.
1. Remove 4 x screws (A) and remove the housing.
2. Remove 4 x screws (B).
3. Replace cylinder (C) and O-ring (D).
4. Loosen the nut (E), remove and replace the cone (F).
5. Reassemble in reverse order.

Cone check/renewal for EVC distribution valve

Periodically check the distribution valves for proper sealing. Do this by
running the sprayer with clean water and open all distribution valves.
Cautiously remove the clip (A) and pull out the hose (B) for the return
line. When the housing is drained, there should be no liquid flow
through the return line.
If there is any leakage, the valve cone (E) must be changed.
1. Remove the clip (C)
2. Lift the motor housing off the valve housing.
3. Unscrew the screw (D) and replace the valve cone (E).
4. Reassemble in reverse order.

Level Indicator Adjustment

The level indicator reading should be checked regularly. When the tank
is empty, the float should lie on the stop pin (D) of the rod, and the O-
ring on the indicator should be positioned at the top position line (A).
If any deviation is found, do the following:
1. Pull out the plug (B).
2. Loosen screws (C).
3. Adjust the length of the cord, until it reads correctly.
4. Push the plug (B) back into place.
÷
NOTE! To obtain the best accuracy, the adjustment shall be done
with the sprayer attached to the tractor normally used.
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