Disassembly Of The Pumping Body; Assembly Of The Pumping Body - OMAC B Series Operation And Maintenance Manual

5.7.1 Disassembly of the pumping body

Before removing the cover, ensure that the pump and motor are insulated, that the pump is cold enough to be touched safely, that all fl uids have been
discharged and make sure that the pump body is insulated and de-pressurised. If the end cover is fi tted with a by-pass valve consult the relative section.
Then proceed as follows:
1
Remove the front nuts and exert leverage in
the provided slots on cover
2
Unscrew anticlockwise the rotor nuts, inter-
posing a non metal element between the rotors,
making them stop rolling
3
Take care of the reference marked on rotors
and shafts (1-2) so that you will set them rightly
while reassembling
4
Extract the rotors, taking care you don't dama-
ge them by means of metal tools
5
extract the rotor case
6
Extract the rotating part of the mechanical
seal from the shaft, after disassembling the bea-
ring retainers
7
Untighten the socket head screws on mecha-
nical seal
8
Extract the rotating part of the mechanical
seal from the shaft

5.7.2 Assembly of the pumping body

ATTENZIONE
9
During the following operations, take care you don't damage the lapped seal surface; don't lay them on the bench and handle them with clean hands
10
Clean carefully the shafts. Lubricate lightly
the O-ring and introduce the rotating part of the
seal, possibly by means of a conical bush Exert
pressure only with hands; avoid using metal
tools
11
Be sure the mechanical seals stand on the
shaft shoulder and tighten step by step the soc-
ket head screws. We suggest you should use a
thread locking adhesive in order to avoid their
untightening on work
12
Assemble the stationary part of the seal on
rotor case, taking care to aline the slot with the
retainer pin, already arranged on seat bottom
13
Clean carefully the seal slide surfaces and assemble the rotor case delicately in order not to damage the seals and be sure it is well set on plugs.
Clamp the back nuts
14
Assemble the rotors, setting them on pitch setting, according to reference marks (1-2). Clamp the rotor nuts (see cap.1.3.6). In order to stop turning,
interpose a non metal element between rotors
8
Chap.5 - pag.
Via Giovanni Falcone, 8 42048 Rubiera (RE) - Italy
E-mail:info@omacpompe.com SitoWeb:www.omacpompe.com
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O.M.A.C. s.r.l.
Tel.0522/629371 - 629923 Fax 0522/628980
Rev.4 del 01/2011 O.M.A.C. s.r.l.
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