Samoa DF250 Serie Guía De Servicio Técnico Y Recambio página 11

PUSHING ROD/CENTRAL BUSHING AND SEAL MAINTENANCE
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, and tighten the screws with a maximum
torque (see torque table page 11).
6. Assemble the directional valve with being careful not to damage the O-rings
and tighten the screws with a maximum torque of 132 lbf·in (15 N·m).
AIR SENSOR (ONLY FOR MODELS WITH DIRECTIONAL 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 three 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 remaining components in reverse order. Fit the side cover and tighten the screws.
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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