44
4.4
Oil Change
Frequency of oil change is dependent on pump service and environmental conditions. As a
general guide, oil in the bearing housing should be changed every 5000 operating hours, after the
initial change.
4.5
Lubrication Specification
The ideal bearing lubricant is a straight well refined, neutral mineral, preferably of the turbine type.
It should not contain free acid, chlorine sulphur or more than a trace of free alkali. It is suggested
that the oil conform to the following physical characteristics.
Type
Lubrication Service
Lube Oil Specification
Make, Type and Grade
Approx Consumption
Continuous operation
Quantity
Flushing Requirements
Viscosity 210°F (99°C)
and 100°F (38°C)
Type, Quantity
Pour Point
Flash Point
Running in Period
First Oil Change
Further Oil Changes
One Years Consumption
Mineral Oil (Petroleum based)
Ball Bearing
ISO VG 32
See Table Below
0.12 litres, ¼ pint per month
See following page
Low pour point mineral oil
4.7 c/s min. at 210°F (99°C)
29 c/s min - 43 c/s max at 100°F (38°C)
As required
Minus 20°F Max (-29°C max)
330°F Min. closed (165°C Min. closed)
500 hours
500 hours
5000 hours
1.44 litres approx. max
- Synthetic Lubricants
If a synthetic lubricant (fire resistant fluid) is to be used instead of the normal type oil for the
lubrication of bearings, gears etc., the material of all gaskets and "O" rings in contact with the
lubricant must be compatible with the lubricant. Normal gasket materials will usually swell and
deteriorate when immersed in synthetic lubricants: also normal paints will peel from internal walls
of reservoirs and bearing chambers.
