Emerson Daniel 1770, User Manual

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5.2 Pilot disassembly (1770)
1. Remove the 1770 pilot from valve by disconnecting the external tubing.
2. Turn pressure adjustment screw counterclockwise until tension is relieved on the
spring. Push in on pilot cover and remove by extracting the retaining ring.
3. Hold the shaft nut and remove the nut and lockwasher by disengaging the poppet
shaft assembly from the sensing piston.
4. Remove sensing piston. Remove poppet shaft and cage as a unit after removing
retainer ring.
5. Remove poppet shaft and guide bushing. Remove poppet shaft from guide bushing.
Use 3/32” punch and drive roll pin from poppet shaft.
6. Use 3/32” punch and drive roll pin from poppet shaft. Remove retainer sleeve and O-
ring from shaft.
7. Remove and inspect all O-rings.
CAUTION!
EQUIPMENT HAZARD
Observe all precautionary signs posted on the equipment.
Failure to do so may result in injury to personnel or cause damage to the equipment.
CAUTION!
EQUIPMENT DAMAGE
Read the entire recommended procedure for all installation operations and
maintenance procedures before attempting to install or disassemble the valve.
Disassembly of this cylinder assembly is different from previous Daniel Control Valves
and requires strict adherence to the procedures outlined in this manual.
Failure to read and comply with these procedures could result in damage to the
equipment and compromise in the integrity of the operation.
5.3 Pilot disassembly (2770)
1. Isolate and remove all pressure and drain before maintenance.
2. Remove the pilot from the valve by disconnecting the external tubing.
3. Turn pressure adjustment screw counter-clockwise until tension is relieved on the
spring. Push in on the pilot cover and remove by extracting cover retainer. Unscrew
counter-clockwise.
4. Disengage the poppet shaft assembly from the sensing piston by holding the shaft
and removing the nut and lock washer.
5. Remove sensing piston.
Planned maintenance
User Manual 59