Maintenance
7.4 Installing
Reinstall the components concentrically, without canting,
in accordance with the marks applied.
WARNING
Risk of injury due to heavy components!
Pay attention to the component weight. Lift and transport
heavy components using suitable lifting gear.
Set down components safely and secure them against
overturning or rolling away.
WARNING
Risk of injury during assembly!
Install spring-loaded components carefully (e.g. mechan-
ical seal, tensioned bearing, valves etc.), as components
can be ejected by the spring tension.
Observe the manufacturer’s specifications (e.g. for the
motor, coupling, mechanical seal, blocking pressure sys-
tem, cardan shaft, drives, belt drive etc.).
NOTE
Material damage due to unsuitable components!
Always replace lost or damaged screws with screws of the
same strength. (→ 9.2.4 Tightening torques, Page 43).
Only replace seals with seals of the same material.
NOTE
Material damage caused by knocks and bumps!
Do not knock or hit any components of the pump.
1. Observe the following during installation:
– Replace worn parts with genuine spare parts.
– Replace seals, inserting them in such a way that they
are unable to rotate.
– Adhere to the prescribed tightening torques
(→ 9.2.4 Tightening torques, Page 43).
2. Clean all parts (→ 9.2.5 Cleaning agents, Page 43). Do
not remove any markings which have been applied.
3. Install the pump (→ sectional drawing).
4. Replace the antifriction bearings.
5. Fill any open antifriction bearings witho
ut guard disks with
grease:
– Make sure you use the correct type and mini-
mum amount of grease when filling the bearing
(→ 9.2.6 Lubricants, Page 43).
– Fill the cavities between the rolling elements up to 40
%
with grease.
– Wipe off any excess grease with a soft object.
6. Installing the pump in the system (→ 5 Setup and connec-
tion, Page 16).
7.5 Ordering spare parts
For trouble-free replacement in the event of faults, we rec-
ommend keeping entire insert units or spare pumps avail-
able on site.
The application guidelines described in DIN 24296 rec-
ommend provisions for two years of continuous use
(→ 9.3 Spare parts for two years of continuous operation
according to DIN 24296, Page 48).
Have the following information ready to hand when order-
ing spare parts (→ type plate):
–Pumptype
– Pump number
– Year of manufacture
– Part number
– Designation
– Quantity
28 NT series BA-2021.04 en-US 161-295/E
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