INOXPA HLR, Installation, Service And Maintenance Instructions

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22 7.Maintenance (A) 2021/11
7.5.3. Rotor case assembly
CAUTION! When reassembling the rotor case, pay attention to the position of the centring pins.
Pumps Size 0:
• Mount the rotor case (01) on the gear case (06). Due to the
tightness of the pins, it is necessary to use a Nylon hammer. Lightly
tap the rotor case until it is tight to the gear case.
• Attach the allen screws (51B).
• Tighten the nuts with the appropriate tightening torque.
Pumps Size 1, 2, 3, 4:
• Mount the rotor case (01) on the gear case (06). Due to the
tightness of the pins, it is necessary to use a Nylon hammer. Lightly
tap the rotor case until it is tight to the gear case.
• Attach the nuts (54A) with the washers (53).
• Tighten the nuts with the appropriate tightening torque.
7.5.4. Assembly of mechanical seals
Consult section
7.7 Assembly and disassembly of the mechanical Seals
7.5.5. Lobe assembly
ALWAYS check the clearance between the lobes and lobes and rotor case before finishing assembly.
See
7.6.1 Clearance and tolerance table
HLR 0
• Fit new O-rings (80) to the lobe screws (25)
• Lubricate the rings with soapy water or edible oil compatible with the
material of the O-rings, pumped liquid and application.
• Fit the shims (32) on the shafts (05 and 05A).
• See chapter
7.6.3 Lobe/Pump Rotor case adjustment using shims
.
• Place the lobes (02) on the shafts (05 and 05A) ensuring that the
lobe and shaft markings (numbers 0 and 1) coincide.
• Tighten the lobe screws (25) using a spanner. In order to prevent
the lobes from turning simultaneously, blocks of wood or plastic can
be placed between the lobes.
• Assembly is exactly the same for all lobe types.
HLR 1, 2, 3, 4
7.5.6. Pump cover assembly