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

Rev.4 del 01/2011 O.M.A.C. s.r.l.

5.8.1 Disassembly of the pumping body

1
Remove the front nuts and exert laverage 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
Unscrew the back nuts and extract the rotor
case
6
Extract the stationary part of the mechanical
seal from rotor case
7
Untighten the socket head screws on mecha-
nical seal
8
Extract the rotating part of the mechanical
seal from the shaft

5.8.2 Assembly of the pumping body

9
During the following operations, take care you don't damage the lapped seal surface; don't lay them on the bench and
ATTENTION
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 socket 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.4.5). In order to
stop turning, interpose a non metal element
between rotors

5.8.3 Disassembly of the bearings box

15
After disassembling the rotor case, drain
the oil and the remove drive key on shaft
16
Remove the gear cover and make a re-
ference mark on gears in order to respect the
right timing while reassembling
17
Disconnect the retainer keys on lock
washers
18
Unscrew the gear ring nut, inserting a non metal wedge between gears in order to stop turning
15
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
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Chap.5 - pag.
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