30
ELRO
®
Pumps for hazardous materials GUP 3-1,5 and GP 20/10Ex
5.4
Replacement of abutment
When replacing the hose you should also
examine the abutment for damage
1. Remove both side plates from the pump
carrier frame.
2. Unscrew both abutment fastening
screws (part-no. 1020, Fig. 13) and
remove the abutment from the housing
(part-no. 135, Fig. 21).
Clean the housing thorough-
ly before assembling the new
abutment.
Do not forget to assemble the copper
sealing rings (part-no. 1020b, Fig. 13) with
the abutment fastening screws.
5.5
V-belt drive
The installed V-belt has been designed for a
power transfer of up to 3 kW under perma-
nent operation.
5.5.1 Axial locking of the pulleys
In order to prevent the setscrews from loo-
sening, use thread adhesive Loctite243
orTuflok 180 when assembling.
5.5.2 Checking the tension of the
V-belt
If the V-belt tension slackens (V-belt can be
depressed for more than 1 cm), the V-belt
needs to be tightened.
1. Remove both side plates from the
pump.
2. Loosen four fastening screws on the
motor foot.
3. Loosen the counter nut on the V-belt
tensioning device and tighten the ten-
sioning screw until the correct V-belt
tension is achieved.
Fig. 21 Disassembly of abutment
4. Lock the tensioning screw with the
counter nut.
5. Tighten the fastening screws on the mo-
tor foot and make sure that the V-belt is
properly aligned.
6. Reassemble the side plates.
5.6 Oil change
5.6.1 Pump housing:
The pump housing is filled with 1 litre of sili-
cone oil. Due to the ageing of the oil, the oil
should be changed at intervals of 3 years.
5.6.2 Gearbox:
The gearbox is lifetime lubricated by 0.25
litres of low viscosity oil.
The oil only needs to be changed in case of
an oil loss.
1 Abutment
2 Abutment fastening screws
