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2. Periodical inspection
Clean the exterior of the coolant pump to remove dust and oil. Clean the oil tank periodically.
Notes that deposits of metal chips in the oil tank can result in damage to the pump.
3. Bearings
Ball bearings sealed in grease, with a semipermanent operating life, are used in this pump,
requiring very little need for maintenance. In case the ball bearings develop trouble, immediately
replace them with new ones. Bearing numbers for each type pump are given on the Nameplate.
4. Mechanical seal
The mechanical seal is designed, so the possibility of mechanical damage is reduced to a
minimum, thereby, contributing to an extremely long usable life. Damage to the mechanical seal is
most often caused by the entry of dust and other foreign matter which finds its way into the seal.
The following indications warn of damage to the mechanical seal, if anyone of these troubles
occur, replace the defective seal with a new one. When installing a new mechanical seal, assure
that the positioning of the metal retainer is as shown in the adjacent photo.
Starting:
Operation:
Stopping:
VKN043～093A, 045～095A
5. Maintenance of oil seal
The VKS 152AC is provided with an oil seal to prevent entry of liquid into the bearing. The oil seal
should be replaced with new one at the time of replacement of the bearing.
This coolant pump is designed to operate indoors, water or liquid must not be sprayed directly onto the
motor of the pump or terminal box.
This coolant pump is only a component, it must be installed in a machine or part of a machinery which
meets the terms of the Machine directive 89/392/EEC. Commission will not occur until the end
product or machinery conforms with the guidelines in EN60204-1.
Troubles
Self-suction time is long.
In the worst case, self-suction stops completely
The amount of flow is reduce;
oil cannot be pumped up.
Liquid leaks through drain hole.
WARNING!
- 9 -
VKN113A, 115A
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