There are two configurations of reservoir pistons. The old is a solid type and the new has a retaining ring on the end of the piston rod. Replace old type piston with the new configuration.

Do not remove retaining ring from indicator rod when performing step e.

e. Slide piston (19) from indicator rod (4).

f. Remove preformed packing (20) inside bore of piston (19). Discard preformed packing.


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