JABSCO Hy-Line, Installation, Operating, Maintenance And Spares Manual

Page: 25 / 52

07/03
Hy~Line
and
Ultima
Lobe Pumps
are kept with correct rotor and shaft.
b) Keep each rotor with its respective shaft
to ensure correct mating of sealing
faces on re-assembly - you may wish to
mark or label the components at this
stage.
c) Take care not to damage the rotors and
especially the smooth face of the
mechanical seal (80) which is pressed in
the back. Do not attempt to remove the
seat unless you intend to fit a new seal
(80) or cup rubber (83).
Re-fitting:
a) With the seal and cup rubber correctly
fitted within the back of the rotor, clean and
dry the seal faces with a soft tissue before
re-fitting. Do not lubricate seal faces.
b) Slide the rotor assemblies into their
respective shafts. When fitting each rotor it
should slide freely on its drive splines.
(LH72, 74, 76 & Tanker pumps - Locate
rotors on pin)
c)
Hy~Line
pumps - refit the O-ring (58) to
the rotor screw (59) and lubricate the bore in
the front of the rotor. Lock the rotors using
a soft spacer and refit the screw. Retighten
using the special tool provided to the torque
specified in Figure 11a.
c) LH72, 74, 76 & Tanker Pumps - Lock
the rotors using a soft spacer and re-fit the
three rotor bolts to torque specified in
Fig.11a. Re-fit the O-ring (58) to the
hygienic cap and lubricate the bore in the
front of the rotor. Retighten using the special
tool provided to the torque specified in
Figure 11a.
c)
Ultima
pumps - secure the tie-rod with
the washer and nut. Lock the rotors using a
soft spacer and tighten nut to the torque
specified in the Performance Data Sheet.
6.03 MECHANICAL SHAFT SEALS –
SINGLE SEAL & PRIMARY SEAL
OF A DOUBLE SEAL
When the rotors have been removed (see
Section 6.02) the primary seals can be
inspected for wear, cracks, chips, scratches
or signs of burning caused by running dry.
Inspect rubber joints for damage or
deterioration. Clean the seal faces with soft
lint-free tissue before re-assembly.
It is advisable to purchase and fit new
elastomer trim kits from your local
distributor, when removing and re-fitting seal
Page 23
Figure 11
Rotor Locking and
Retainer
Removal/Refitting
To loosen
bottom rotor
To tighten
bottom rotor
Pump Size
LH/LU 32/34 18NM
LH/LU 42/44 55NM
LH/LU 52/54 55NM
LH/LU 62/64 100NM
Hygienic Cap 20NM
Bolts
25NM
Hygienic Cap 40NM
Bolts
50NM
LT62/64 (tri-bolt)
LH72/74/76 (tri-bolt)
Torque
Figure 11a