INOXPA HLR, Installation, Service And Maintenance Instructions

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24 7.Maintenance (A) 2021/11
7.6. LOBE ADJUSTMENT AND SYNCHRONISING
7.6.1. Clearance and tolerance table
(mm) A B C D E
HLR 0-20
0,12
±0,05
0,07
±0,03
0,15
±0,05
0,15
±0,05
0,35
±0,05
HLR 0-25
0,15
±0,05
0,08
±0,03
0,2
±0,05
0,15
±0,05
0,4
±0,05
HLR 1-25
0,15
±0,05
0,1
±0,05
0,15
±0,05
0,15
±0,05
0,35
±0,05
HLR 1-40
0,15
±0,05
0,1
±0,05
0,2
±0,05
0,15
±0,05
0,4
±0,05
HLR 2-40
0,2
±0,05
0,15
±0,05
0,15
±0,05
0,15
±0,05
0,35
±0,05
HLR 2-50
0,2
±0,05
0,15
±0,05
0,2
±0,05
0,15
±0,05
0,4
±0,05
HLR 3-50
0,25
±0,05
0,2
±0,05
0,2
±0,05
0,2
±0,05
0,4
±0,1
HLR 3-80
0,3
±0,05
0,2
±0,05
0,3
±0,1
0,2
±0,05
0,5
±0,1
HLR 4-100
0,35
±0,05
0,35
±0,05
0,4
±0,1
0,3
±0,05
0,85
±0,1
HLR 4-150
0,5
±0,05
0,35
±0,05
0,6
±0,1
0,3
±0,05
1,05
±0,1
A = axial clearance between the lobe and the cover.
B = axial clearance between the lobe and the rear of the rotor case.
C = radial clearance between the lobe and the rotor case.
D = radial clearance between the lobes.
E = radial clearance between the lobe and the rotor case on the suction side.
Dimensions in mm
7.6.2. Synchronising the lobes
•
In order to enable the lobes to be tightened, it is necessary to
remove the shaft assembly from the gear case (except in the case
of pump size 0), and mount the lobes (02) on the shafts fixing them
with screws (25).
• Loosen the tightening screws from the adjustable fastening
mechanism for the idler gear (19A). In principle, the adjustable
fastening mechanism is easy to disassemble. It is now possible to
rotate the driveshaft (05) while holding the idler shaft still (05A).