Grundfos EB 20503-2 Owner's Manual Installation And Operating Instructions page 6

Always follow motor manufacturer's lubrication instructions if
available, and periodically check grease fittings and drain plugs
for leaks.
If lubricating instructions do not accompany the motor, refer to the
following table for recommended lubrication periods.
Motor Lubrication
Motor RPM Motor HP
3500 All hp
Standard conditions:
8 Hours per day operation, normal or light loading, clean air,
100ºF, maximum ambient temperature.
Severe conditions:
Continuous 24-hour operation, shock loading or vibration, poor
ventilation, 100-150ºF, ambient temperature.
Extreme conditions:
Continuous operation, heavy shock or vibration, dirt or dust in
air, extreme ambient temperature.
The following table lists the recommended types of grease for
motor lubrication. These types have all been thoroughly tested
and should be used whenever possible.
Manufacturer
Shell
Exxon
Chevron
Phillips
Texaco
5.2 Cross section and parts list for EB 20503-2
Position
Part Name
Number
1 Casing
2 Impeller
3 Bracket
4 Pipe Plug
5 Tubing
6
Operating conditions
Standard Sever Extreme
6 mo 3 mo 3 mo
Lubricant
Dolium R
Polyrex
SRi grease NLGI 2
Blackpearl - NLGI 2
Polytac
Polystar RB
Position
Part Name
Number
6 Seal Assy
7 Gasket casing
8 Wear ring
9 Push Type Fitting
5.3 Cross section and parts list for EB 20501-5
Position
Part Name
Number
1 Casing
2 Impeller
3 Shaft Sleeve
4 Cap Screw Impeller
5 Key, Impeller
6 Washer, Impeller
7 Gasket, Casing
Position
Part Name
Number
8 Pipe. Plug
9 Wear Ring
10 Adapter
11 Tubing
12 Push Type Fitting
13 Seal Assy
14 Bracket