Maintenance; General; Ball Bearing; Shaft Seal - Johnson Pump SPX FLOW TopGear GS Instruction Manual

5.0 Maintenance

5.1

General

• Pumps certified for 'Explosion protection' need maintenance and precaution to
prevent risks of ignition due to malfunction and unacceptable wear.
• Follow the Maintenance Instructions given in the Instruction Manual (IM). Follow the
separate instructions for gear and motor drive as well.
• A decrease of flow rate (or in case the pump does not supply the required pressure)
is an indication of a possible malfunction or a sign of internal pump wear and requires
maintenance or repairs. Other indications of internal pump wear is excessive noise
during operating, vibrations or shaft seal leakage.
• Use anti-sparkling tools when working on the pump or pump unit in an potentially
explosive atmosphere.
!
Only use a damp cloth for cleaning all surfaces.
5.2

Ball bearing

• The bearing bracket and external bearing assembly must be checked regularly for
correct functioning.
• Excessive noise, vibrations and heat build-up are an indication of malfunction and
premature failure of a ball bearing or its lubrication.
• It is recommended to check the bearing(s) on vibrations by monitoring it.
TG GS, GP, GM, H and SRT
• Relubrication of the ball bearing(s): see IM.
• The axial clearance of the running internals is achieved by adjustment of the bearing
assembly. For information about axial clearance adjustment, see IM.
TG MAG
• The ball bearings in the bearing bracket are sealed and filled with grease for life-time.
and do not require re-lubrication.
• Ball bearings must be lubricated with heat-resistant grease when pumping liquids over
180°C.
5.3

Shaft seal

• The correct function and lubrication of the shaft seal must be checked regularly and dry
running must be prevented. Gland packing must have a small, visible leakage.
• Several types of connections can be made to ensure proper liquid circulation, venting
and lubrication. For more information see IM.
• For single shaft seals, such as gland packing and single mechanical seal, the operator
must ensure that the temperature of the seal area surfaces will not exceed the allowable
temperature. If this cannot be ensured by the operator, monitoring devices should be
installed.
• Quenched mechanical seals (single or double) have to be protected by controlling the
quench liquid.
A.0500.601 – Atex IM -TG G/H/MAG/SRT/08.00 EN (01/2021)
19