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HARDI NAVIGATOR
2 The diaphragms (E Fig 46) may now be changed.
3 If fluids have reached the crankcase, re-grease the
pump thoroughly. Ensure the drain hole at the
bottom of the pump is clear.
NOTE! When tightening diaphragm cover it must be
ensured that diaphragm is in neutral or out. If the
diaphragm is in negative, the edge of the diaphragm
is not seated correctly in the diaphragm cover. This
will damage the diaphragm which will not seal
correctly after being re-assembled.
Rotate the pump until the diaphragm is neutral or out.
4 Reassemble with torque settings as in Torque (P 23).
ACE pump
To Replace Pump Seal
1 Remove screws (A Fig 47),motor (B) and coupler (C).
2 Remove rear bearing snap ring (D), four screws (S)
from mounting frame (E), and volute (F).
3 Remove lock nut (G) and washer (H) from shaft (I).
4 Carefully hold impeller vane (J) stationery, and press
shaft out of impeller using one of the long hex screws.
5 Remove impeller, key (K) and rotating seal member (L).
Press shaft (with bearings (M)) assembly out of frame.
6 Remove stationery seal member (N) and O-ring (O)
from shaft groove.
7 Press shaft / bearing assembly back into frame, and
re-install the rear internal bearing snap ring.
8 Clean old sealant from mounting frame seal bore.
9 Apply non-hardening gasket cement under stationery
seal member flange, place over shaft and press into
seal bore cavity. Use a length of 1 3/4" ID pipe as a
tool to press seal flange down evenly on all sides.
10 Install rotating seal part over shaft and O-ring by
hand, avoiding contact with the polished seal faces.
The two polished faces should face each other.
11 Insert key in keyway and install impeller on shaft.
Place lock washer and nut on shaft and tighten nut.
12 Replace volute O-ring (P), and volute. Secure with screws.
13 Position coupler in pump shaft slot. Fill cavity around
coupler with grease.
14 Install motor by aligning motor tang and coupler slot.
Rotate motor until nameplate faces up and secure
with screws.
Fig 47
14
EVC Cone check / renewal - operating unit
If the main on/off valve does not seal properly (dripping
nozzles when main on/off valve is closed), bild up of
sufficient pressure becomes difficult or pressure fluctua-
tions occur, cone and cylinder may need replacing.
Hardi Kit for this job is Part No 741293.
Fig 48
1 Remove 4 screws (A Fig 48) and remove housing.
2 Remove 4 screws (B).
3 Replace cylinder (C) and O-ring (D).
4 Loosen Nut (E). Remove and replace Cone (F).
5 Reassemble in reverse order.
EVC Cone check / renewal - distribution valve
Periodically check the distribution valves for proper seal-
ing. Do this by running the sprayer with clean water and
opening all distribution valves.
Fig 49
1 Cautiously remove the clip (A Fig 49), (Note: Chemical
spill risk!) and pull out the hose (B). When the housing
is drained, there should be no liquid flow through the
pressure equalization device. If there is any leakage,
valve cone (E) must be changed.
2 Remove clip (C). Lift motor housing off valve housing.
3 Unscrew screw (D) and replace valve cone (E).
4 Reassemble in opposite sequence.
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