Goulds Pumps 3311 - IOM - Manual (Page 19)

19
7 Maintenance, Disassembly, Assembly
7.1
Prerequisites
The pump or the pump set must have been taken out of
operation in accordance with the instructions of Section 6.
7.2 Safety measures
• Flush the pump thoroughly before disassembly to
purge away the residual liquid left after draining the
pump.
• Ensure that people and the environment are not put at
risk through explosive, toxic, hot, crystalline, or acid
liquids handled.
CAUTION
• The workplace for disassembly or assembly must be
clean.
7.3 Maintenance and inspection
7.3.1 Oil-lubricated bearings
If the driver is on the discharge side, the pumps will be
equipped with oil-lubricated anti-friction bearings on the
drive side and a sleeve bearing lubricated by the liquid
handled on the suction side. If the driver is on the suction
side, the pump will have an oil-lubricated anti-friction
bearing on the suction side. An additional oil-lubricated
anti-friction bearing will be mounted on the discharge
side of pumps equipped with a lift-off device.
Pumps are shipped from the factory without oil in the
bearing housings.
The bearing housings must be filled with oil before initial
start-up.
CAUTION
• Use only very clean and non-ageing oil with good
water separating and corrosion protection properties.
Standard design with constant level oiler
- Pull oil bottle out of the screw-in elbow.
- Fill the bearing housing with oil until the oil becomes
visible in the screw-in elbow.
- Fill oil bottle through filler hole.
- Replace oil bottle. As long as there is oil in the bottle
the oil level in the bearing housing is sufficient.
If the bearings are new, change first oil after about 200
operating hours. Afterwards, change the oil in accordance
with the following table:
light service normal and severe service
Light contamination,
T < 50 °C
light contamination,
T > 50 °C
Annually every six months
Use the following lubricating oils:
Bearing temperature
< 80 °C Ambient
temperature
< 0 °C
n
≤ 1500
rpm
n > 1500
rpm
Lubricating oil acc.
to DIN 51517 CL 68 CL 46 CL 22
Kin. viscosity
at 40 °C in mm²/s 61.2 to
74.8
41.8 to
50.8
19.8 to 24.2
Neutralization
number
≤ 0.15 mg KOH/g
Ash content,
weight-%
≤ 0.02
Water content,
weight-%
≤ 0.1
Oil consumption (l)
Size Lift-off device
without with
2x3-7 0.19 0.25
2.5x4-8 0.24 0.30
4x5-11 0.27 0.35