52
Wilo Salmson France SAS 11-2016 V05 DIN A4
English
MAINTENANCE AND REPAIR
RISK
of injury from hot and/or pressurised oil!
After the pump is switched off, the oil is still
hot and pressurised. This can cause the screw
plug to be ejected and hot oil to escape. There
is a risk of injury or burns! First allow the oil to
cool down to ambient temperature.
Fig. 7.: Screw plugs
1 Screw plug
1.
Position the pump horizontally on a firm surface
with the screw plug facing upward.
Make sure that the pump cannot fall over and/
or slip!
2. Carefully and slowly unscrew the screw plug.
Attention: the oil may be pressurised! This can
cause the screw to be ejected at speed.
3. Empty out oil by rotating the pump until the hole
points downwards. Collect the oil in a suitable
container and dispose of it in accordance with the
requirements in the "Disposal" chapter.
4. Rotate the pump back until the hole is pointing
upwards again.
5. Pour the new oil in through the hole for the screw
plug. The oil should reach up to about 1 cm below
the hole. Note the recommended oils and filling
quantities.
6. Clean the screw plug, replace the joint ring and
screw it back in.
8.3.7.
General overhaul (motor version "P" only)
In a general overhaul, the normal maintenance
work is carried out and in addition the motor
bearings, shaft seals, O-rings and power supply
cables are checked and replaced, if necessary.
This work may be performed only by the manu-
facturer or an authorised service workshop.
8.4. Repairs
Before carrying out repairs:
• Disconnect pump from power supply (disconnect
from mains network).
• Allow the pump to cool down and clean it thor-
oughly.
•
Place the pump on a firm surface and secure it
against slipping.
• Always replace O-rings, seals and screw locking
devices (spring lock washers, Nord-Lock wash-
ers).
•
Note and comply with the specified tightening
torques in the appendix and in the individual work
steps.
• Never use force when carrying out this work!
8.4.1. Readjusting the macerator
BEWARE of the macerator!
The pump is equipped with a macerator. When
coming into contact with the blade, limbs
may be crushed or be amputated! Never reach
directly into the macerator. Wear the correct
protective gloves when working on the unit!
Internal macerator (SDL GI)
Normally, the gap between the cutting plate and
rotating blade is 0.1 mm. If the gap is larger, the
cutting performance may decline and clogging
may increase. In this case, the gap needs to be
readjusted.
Fig. 8.: Overview of macerator
1...4 Grub screw
7 Rotating blade
5
Cylinder head screw
8 Pressure connection
6
Cutting plate
Necessary tools
• Torque wrench with size 4 Allen wrench insert
• Size 5 allen wrench
• Size 4 allen wrench
Work steps
1. Unscrew the grub screws from the cutting plate.
2. Press the cutting plate against the internal blade
so that they come into contact.
3. Slowly screw in the four cylinder head screws,
gently and by hand
, until they are against the
cutting plate.
Attention: do not screw in tightly!
4. Screw the grub screws back into the cutting plate
and tighten them crosswise using the torque
wrench.
Tighten as follows:
•
Grub screw 1: 3 Nm
•
Grub screw 2: 6 Nm
•
Grub screw 1: 6 Nm
•
Grub screw 3: 3 Nm
•
Grub screw 4: 6 Nm
•
Grub screw 3: 6 Nm
External macerator (SDL GE)
Normally, the gap between the cutting plate
and rotating blade is 0.1 to 0.2 mm. If the gap is
larger, the cutting performance may decline and
clogging may increase. In this case, the gap needs
to be readjusted.
The gap here is determined by the shims between
the rotating blade and the impeller. The shims
have a thickness of 0.1 mm and 0.2 mm.
Fig. 9.: Overview of macerator
1 Rotating blade
4 Fastening screw
2 Cutting plate
5 Impeller
3 Shims
