Hardi ZEBRA AXIAL, Инструкция

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6 - Maintenance
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Occasional maintenance
Diaphragm pump
Replacement of valves and diaphragms. The procedure is similar for both models 321 and 363 pump.
321 pump
1. Dismantle the valve cover.
2. Replace the valves and O-rings.
3. Undo the bolt and replace the diaphragms.
4. At this stage make sure that the diaphragms are fitted in the
correct position. The part indicated must be facing outwards.
5. Tight the screw which is supporting the diaphragm at the
maximum with 60 Nm.
6. Lubricate seals and fit the valves. Take care not to fit valves on
upside-down.
7. Fit the diaphragm cover again. When the cover is placed on top of
the diaphragm, and before the bolts are tightened, turn the
crankshaft one turn to seat the diaphragm correctly in the cover
Torque settings for the 321 are:
Crankcase: 60 Nm / 44.4 lbft
Crankshaft: 70 Nm / 51.8 lbft
Diaphragm screws: 60 Nm / 44.4 lbft
Piston pump - Plunger tightness
When you detect a continuous leakage of liquid from the bottom of the
pump cylinders, it may be necessary to replace the pump plungers due
to wear.
μ
ATTENTION! Before replacing them, be aware that the leather
gives over time in the sleeve and dripping can occur. If this
happens, tighten the leather tensor and the liquid will stop
dripping.