This section provides the procedures for replacing the major components in the dispenser. Note
that other sections in this manual that are specific to a model type, such as suction pumps, DEF,
LPG, and metal head dispensers, also contain replacement procedures.
Read the WARNING information in this section before servicing the dispenser. Before power is
removed from the dispenser, totals should be recorded in case of memory alteration.
As a general rule, when removing and installing electronic boards, take care not to contact the
boards with one another. Do not lay spare boards on top one another, since contact between
components might cause damage to the circuit board coating, circuit board tracks, or circuit
components.
Always keep replacement components in their anti-static shipping bags until they are installed.
Put replaced suspect components in the anti-static bags for return to the factory in original
packaging and fill out a return parts tag.
Before replacing any components, servicing personnel should wear a static guard wrist strap
(part number 916962 or equivalent) securely attached to an earth grounding point in order to
prevent damage to electronic components due to static electricity.
After replacing a component, make a thorough visual inspection of your work to ensure the fol-
lowing:
•
All connections are secure
•
All mounting hardware is secure
•
There are no loose washers, screws, tools, etc., lying around which might cause a failure.
76 WM048523 Rev 08 01/2019
6 Replacement Procedures
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