HOUSING (CHEMICAL FEED PUMP) MAINTENANCE.
This task consists of:
General Mechanics Tool Kit (Appendix B, Section III, Item 4)
Solvent, drycleaning (Appendix C, Section II, Item 28)
Tape, Anti-seize (Appendix C, Section II, Item 30)
O-ring - ZM-PA-1229-EM-Y
Chemical feed pump removed (para. 2-68).
General Safety Instructions
Using drycleaning solvent incorrectly can cause injury or even death.
Remove oil drain plug (6) and drain oil from chemical feed metering pump (12).
Remove oil fill plug (3) from housing (5).
Bearing holder is under spring tension. Use care in removing bearing
holder to prevent personal injury or damage to equipment.
There are four diaphragm drive assemblies on the chemical feed
metering pump. All are disassembled the same. One is shown, the
others are similar.
To aid installation, mark position of bearing holder screws before
Remove two screws (13) and bearing holder (12).
Remove shaft (9), washer (10), and spring (11).
Remove key (14) and stop pin (8) from shaft (9).