FLYGT DX Series User manual

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Doc. :DX
First edition date :12/98
Revision date :
Disassembly and Assembly Instructions
DX SERIES

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DX pump disassembly P. 3
DX pump assembly P. 12
Head components - Exploded view P. 27
DX 35-5, 50-7 spare - Exploded view P. 28
DX 50-11, 50-15 spare - Exploded view P. 29
Electrical connection P. 30
Electrical connection with external panel P. 31
NOTES:
- The pump should be serviced by qualified personnel only, after having been
disconnected from the power mains.
- The DX pump components listed in this manual are accompanied by
identification numbers that refer to the drawings on pages 28 - 29.
- These numbers identify spare parts as listed in our specific catalogue.
- The assembly and disassembly procedure for the DX S versions is the
same.
- The mechanical seal and O-rings should be replace each time you
assemble the pump.
- In the event of damage to the head we recommend that you replace it with
the pre-assembled one (contact our Service Center).
Contents

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Disassembly
• Place the pump on a clean and
well-lit workbench.
• Loosen the screw in the center of
the head.

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Disassembly
• Unscrew the three socket head
screws from the head.
• Remove the head as shown in the
picture, using a plasti hammer and
chisel. Be careful not to damage
the head.

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Disassembly
• Loosen the terminal box screws
and disconnect all the wires, then
remove the capacitor. (18 if any).
• With a socket wrench, loosen the
screws that hold the feet (12).

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Disassembly
• Remove the suction flange (5).
• Loosen the impeller fastening hex
screw. To secure the impeller,
insert a screwdriver* through the
pumps’ delivery port.
*Not shown in the picture.

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Disassembly
• Remove the impeller (2); if
necessary, use a pair of pliers. On
the DX 10-15-20 models, retrieve the
impeller lock tab. Remove the V-ring
(24). Loosen the oil chamber
fastening screw (23) and drain the
oil.
• Loosen the stop ring screws (15).

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Disassembly
• Remove the stop ring and place
the pump in a pan to collect the oil.
(if necessary, prize it out with a
screwdriver).
• Tap the pump body (1) gently with
a rubber hammer to separate from
the shell with wound stator (3).

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First edition date :12/98
Revision date :
Disassembly
• Remove the shell with stator after
the oil residues have crained.
Remove the fixed part of the
mechanical seal (9) from the pump
body.
• Extract the oil conveyor (10).

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Disassembly
• Use a screwdriver to prize out the
rotating part of the mechanical
seal. Remove the washer
underneath.
• Tap the shaft gently (4) on the
head side, through the hole in the
bearing seat.

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Disassembly
• Slide out the rotor shaft and lower
support. Separate the shaft from the
support and remove the bearing ring
(20) and the seal ring (21).
• Remove the compensation ring
(11) located in the bearing seat.

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Assembly
• View of motor casing with wound
stator (3).
• Insert the compensation ring(11) in
the bearing seat, inside the motor
casing with wound stator (3).

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Assembly
• Insert the rotor shaft with
pre-assembled bearings (4).
• Insert the lower bearing ring (20)
with the lipped side upwards.

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Assembly
• Insert the seal ring (21) over the
bearing’s lower support (6). During
assembly make sure that the open
side, where the spring is visible, is
turned towards the inside of the
bearing’s lower support.
• With the plastic tap, position the lip
seal ring in its seat in the lower
support (6).

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Assembly
• Insert the bearing’s lower support
in the motor casing with wound
stator.
• Using a rubber hammer, gently tap
the bearing’s lower support on
alternate sides to slide it into place.

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Assembly
• Put the mechanical seal’s washer
(9) on the pump shaft.
• Using the seal guide, install the
rotating part of the seal with the
polished side up.

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Assembly
• With the plastic tap, position the
rotating part of the seal in its seat
as shown in the picture.
• After installing the seal, position the
oil conveyor (10) over the seal (9).

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Assembly
• Position the gasket (19) over the
bearing’s lower support.
• Install the fixed part of the seal (9)
in the pump body (1), with the
polished side up. Be careful not to
damage it.

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Assembly
• With a plastic tap, slide the fixed
part of the seal into position.
• Carefully position the pump body
(1) on the motor casing with wound
stator (3).

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Assembly
• Assemble the fastening ring (15).
• Tighten the fastening ring screws
in cross sequence
(driving torque 6Nm).