Maintenance, Cleaning And Recalibration; Periodic Maintenance; Corrective Maintenance; Removing The Cover - WIKA CPB3800 Betriebsanleitung

Kolbenmanometer in kompaktausführung

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7. Maintenance, cleaning and recalibration

Repairs must only be carried out by the manufacturer.

Cleaning the units and checking the liquid levels is the only periodic maintenance

required. With normal use, no further maintenance should be necessary. If required, the

system can be returned to the manufacturer for re-conditioning. Accuracy, overhaul and

re-certification are also explained in chapter 7.4.1 "Factory overhaul and re-certification

of pressure balances maintenance of accuracy".

7.2.1 General

This section contains details on stripping the unit and replacing the spare parts which

are listed (see chapter 10 "Accessories"). The component identification numbers in

brackets in each procedure refer to the following figure.

1. Drain as much oil as possible from the pressure balance by winding the screwpress

fully clockwise and using a drain screwed in the gauge stand.

2. Unscrew the loose union connection and piston-cylinder unit.

3. Remove the oil cups by levering upwards carefully.

4. Slacken the socket set screw using a 3 mm hexagon wrench key and remove both

handwheels.

5. Remove the four cover retaining screws and lift off the cover.

7.2.3 Reservoir seals

1. Unscrew two screws and remove the reservoir cover

2. Remove the O-ring seal (6) from the recess and the seloc seal (7) from the screws.

3. On replacement ensure all sealing faces are absolutely clean and do not overtighten

screws.

Fluids, which attack ABS, should be used with caution. Continual

immersion of the cover in such fluids will cause deterioration. Spillage's

should be wiped off immediately.

WIKA operating instructions model CPB3800

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