Pfeiffer Vacuum BA 251, Operating Instructions Manual

Page: 32 / 50

32
Maintenance
7.4 Clean the cooling water chambers
Contamination and calcium deposits can affect the pump's cooling water circuit and bring
about an elevated operating temperature. This can be avoided, depending on the cooling
water quality, by cleaning the cooling water chambers at regular intervals.
 Stop cooling water feed and drain cooling chamber at outlet 62.
 Remove flanges 14, 15 and 95; observe seals 22 and 23
(see p. 41, chap. 11.2)
.
 Clean the cooling water chamber with a suitable agent.
 Remount flanges with seals and screw outlet screw 62 back in.
 Restore cooling water feed
(see p. 12, chap. 5.4)
and bleed cooling chambers.
Cleaning the dirt trap
Fig. 17: Cleaning the dirt trap
 Stop cooling water supply.
 Open sealing plug on dirt trap 3.2; pay attention to seal.
 Clean sieve insert.
7.5 Checking the "V" belt drive
The correct belt bias is crucial to efficient power transmission and achieving the usual
belt lifespans. The belts will fail prematurely if the bias is too low or too high. Excessive
belt bias frequently results in pump or motor bearing defects.
The V-belt drive must be checked regularly for wear, damage and V-belt bias.
3.2
WARNING
If drive belts are exposed!
Fingers and hands can become crushed while carrying out service activities.
 Isolate power before removing belt guard.

Do not expose any body parts to the operating range of the belt drive.
 Wear close-fitting clothing.
 Remount belt guard on completion of the work.