Installation and operating instructions Wilo-Rexa NORM 27
MAINTENANCE AND REPAIR English
8.3.2. Regrease the pump bearings
Grease amounts
Type
F1
F2
NORM-M15.77
60 g (2 oz)
110 g (4 oz)
NORM-M15.84
40 g (1.5 oz)
70 g (2.5 oz)
NORM-M25.61
60 g (2 oz)
110 g (4 oz)
RE 25.74E
60 g (2 oz)
110 g (4 oz)
RE 25.93D
60 g (2 oz)
110 g (4 oz)
NORM-M30.41
60 g (2 oz)
110 g (4 oz)
NORM-M50.21
70 g (2.5 oz)
180 g (6.5 oz)
Fig. 10.: Grease nipple
F1+ Bearing on pump side
F2+ Bearing on the motor side
1. Use a grease gun to inject the new grease into the
grease nipples (F1+ and F2+).
2. Clean grease nipple
8.3.3. Vibration measurement
WARNING! Rotating parts!
During operation, the coupling and the two
drive shafts rotate. Danger of serious injuries
to legs and arms. A vibration measurement
may only be carried out if the coupling guard
is firmly installed!
CAUTION! Risk of burns!
The housing parts can heat up to well above
40 °C (104 °F). There is a risk of burns! Wear
heat-resistant protective gloves.
Fig. 11.: Illustration of the measuring points
M1 Measuring point vertical vibration, top of bearing
housing
M2
Measuring point horizontal vibration, lateral to
bearing housing
The vibration measurement must be carried out
at the duty point with the machine running.
1.
Place the measuring point on the first measuring
point: Top side of bearing housing
2. Place the measuring tip on the second measuring
point: Lateral to bearing housing
3. The measured value may not exceed
4.5 mm/s eff.
(0.18 in/s). If the value is higher
than this, consult the Wilo customer service.
8.3.4. Visual inspection of coupling
Visual inspection of the coupling for wear and
damage (see manufacturer’s instructions).
8.3.5. Functional check of pencil electrode for sealing
chamber monitoring
To check the pencil electrode, the pump has to
be cooled to the ambient temperature, and the
electrical connection for the pencil electrode
has to be disconnected in the switchgear. The
monitoring device can then be checked with an
ohmmeter. The following values should be
measured:
-
This value must approach “infinity”. If the
values are low, there is water in the oil. Please
also observe the instructions of the optional
evaluation relay.
If there are larger deviations, please consult the
Wilo customer service!
8.3.6. Oil change in the sealing chamber
The sealing chamber has separate openings for
draining and filling the chamber.
WARNING! Risk of injury from hot and/or
pressurised operating fluid!
After the hydraulics are 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.
Filling quantities
Type
Filling quantity
NORM-M15.77
2.3 l (78 US.fl.oz)
NORM-M15.84
0.65 l (22 US.fl.oz)
NORM-M25.61
2.3 l (78 US.fl.oz)
RE 25.74E
2.3 l (78 US.fl.oz)
RE 25.93D
2.3 l (78 US.fl.oz)
NORM-M30.41
2.3 l (78 US.fl.oz)
NORM-M50.21
4.0 l (135 US.fl.oz)
Fig. 12.: Screw plugs
D- Drain hole screw plug
D+ Filler hole screw plug
1. If you can place a tank beneath the bearing hous-
ing to collect the operating fluid, you do not need
to remove the pump.
2. Carefully and slowly unscrew the screw plug (D+).
Caution: The operating fluid may be pressur
-
ised! This can cause the screw to be ejected at
speed.
3. Place a suitable tank beneath the screw plug (D-)
to collect the operating fluid.
4. Carefully and slowly unscrew the screw plug (D-)
and allow the operating fluid to drain out. Dispose
of the operating fluid in accordance with the
requirements in the “Disposal” chapter.
5. Clean the screw plug (D-), renew the seal ring and
screw it back in.
6.
Pour the new operating fluid in through the hole
for the screw plug (D+). Note the recommended
operating fluids and filling quantities!
7. Clean the screw plug (D+), renew the seal ring and
screw it back in.
Summary of Contents for Wilo-Rexa NORM
Page 2: ...Fig 2 Fig 1 A B 8 9 10 2 4 4 7 5 5 3 1 2 7 1 6 3 6...
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Page 7: ...Fig 7 Fig 6 A A A A 2 4 4 5 5 5 5 5 5 3 1 S1 S1 X X Y Y Z Z Fz Mz My Mx Fy Fx...
Page 8: ...Fig 9 Fig 8 2 3 1 2 4 5 3 1...
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