Danfoss APP series

80 | 180R9346 | AQ240486503020en-001702 © Danfoss | 2023.03
Operation guide Installation, Operation and Maintenance APP 53-92 pumps
BoWex-ELASTIC
®
Operating/Assembly instructions
Type HEW, HEW Compact and HEW-ZS
KTR-N
Sheet:
Edition:
40114 EN
20
of 22
7
Please observe protection
note ISO 16016.
Drawn:
2017-04-24 Shg/Hk
Replacing:
KTR-N dated 2013-06-10
Verified:
2017-04-24 Shg
Replaced by:
!
To inspect the torsional backlash the power pack which is switched off needs to be secured
against accidental switch-on.
 Turn the hub opposite the direction of drive.
!
Here the elastomer part must not be axially displaced from its position of wear.
 Mark elastomer part and hub (see Illustration 16).
 Turn the hub in the direction of drive and measure the torsional backlash S
max.
 When reaching the torsional backlash S
max
the elastomer part must be replaced.
Illustration 16: Marking of the elastomer part and hub
If the torsional backlash is  S
max.
[mm] / friction  X
max.
[mm], the elastomer part must be replaced.
Reaching the limits for replacing depends on the operating conditions and the existing operating parameters.
!
In order to ensure a long service life of the coupling and avoid danger with the use in poten-
tially explosive atmospheres, the shaft ends must be accurately aligned.
Please absolutely observe the displacement figures specified (see tables 13 and 14).
If the figures are exceeded, the coupling will be damaged.
9 Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres
9.3 Inspection of torsional backlash
9.4 Standard values of wear