Repairs; General; Replacing Various Pump Parts - Homa TPM Originalbetriebsanleitung

7. Repairs

7.1. General

The following repair work can be carried out on this machine:

Replacement of impeller and pump chamber
For this work, the following should generally be observed:

O-rings and available seals must always be replaced.

Screw locks such as spring washers must always be replaced.

The tightening torques must be observed.
In general, the following applies for repair work:
Turn off machine, disconnect from the power supply, clean and place on a solid surface in a vertical
position. Secure against tipping over and/or sliding!
Unless otherwise specified, the torque values of the tables should be used. Values for clean, lubricated screws.
Tightening torque [Nm] for screws A2/A4 (friction coefficient = 0.2)
M4
M5
M6
M8
M10

7.2. Replacing various pump parts

Replacing the impeller and pump casing

Loosen and unscrew the Allen screws =(Pos 904.01) with a hexagon socket on the seal casing.

Remove the pump casing from the motor housing. Place on a secure surface.

Fit the impeller firmly with appropriate tools; loosen the impeller mounting and unscrew.

Remove the impeller wheel from the shaft with a suitable puller.

Clean shaft

Place new impeller onto the shaft.
Ensure that the fitting surfaces are not damaged!

Screw a new impeller fastener back onto the shaft. Fix the impeller firmly in place and tighten the
hexagon nut firmly.

Place the pump casing onto the seal casing and attach using the hexagon nuts.

It must be possible to turn the impeller manually.
Replacing the axial face seal
Replacing the axial face seal requires basic knowledge and certain skills regarding these sensitive components.
Furthermore, this machine must be dismantled to a great degree for this work.
Only original parts may be used as replacements!
The inspection and replacement of these parts is carried out by the manufacturer for the overhaul or by specially
trained personnel.
For ex-approved machines, please observe the "EX safety" section in the annex
A2/A4,
Tightness 70
DIN912/DIN933
2.5 Nm
3.5 Nm
6 Nm
16 Nm
32 Nm
A2/A4,
Tightness 80
DIN912/DIN933
3.3 Nm
4.7 Nm
8 Nm
22 Nm
43 Nm
47