Samoa DC30 Guía De Servicio Técnico Y Recambio página 19

REPAIR AND MAINTENANCE PROCEDURES
BALL VALVES REPLACEMENT
1. Close fluid valves.
2. Drain the fluid from inside the pump. Anticipate a drainage of fluid from
inside the pump.
3. Loosen the screws to remove the directional valve. Take special care with
the seals.
4. Remove the valve cover by loosening the screws with an Allen wrench.
Take note of the orientation of the cap, as it is critical to replace it correctly
during reassembly.
5. Install a new set of valves according to these assembly drawings. Ensure
that the ball guides are assembled as shown in the figure on the left, and
tighten the screws with a maximum torque (see "Exploded parts and
spare parts of the pump" section).
6. Assemble the directional valve with being careful not to damage the
O-rings and tighten the screws with a maximum torque of 44.25 lbf·in
(5 N·m).
ATTENTION: To avoid fluid restriction and leakages, follow the
position of the ball checks guides in the figure above.
AIR SENSOR (ONLY FOR MODELS WITH AIR VALVE)
The air sensors are on the inside part of the diaphragm covers. To access them, follow the procedure for "Replacing diaphragms".
Once removed the covers following procedure:
1. Remove the two screws that secure the air sensor to the top.
2. Remove all components of the sensor. Clean the area.
3. Introduce new components in the order shown.
4. Fit the cover on the pump and tighten the screws to the body of the pump. Maximum tightening torque (see torque indicated in the section "Exploded
parts and spare parts of the pump").
5. Fit the remaining components in reverse order.
SAMOA Industrial, S.A. · Pol. Ind. Porceyo, I-14 · Camino del Fontán, 831 · 33392 - Gijón - Spain · Tel.: +34 985 381 488 · www.samoaindustrial.com
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