3-47.1 TIMER REPAIR (MODELS H-9518-1, H-9518-2, H-9518-3).
This task consists of
General Mechanics Tool Kit (Appendix B, Section III, Item 4)
Soldering Iron(Appendix B,Section III, Item 4)
Soft-Bristled Brush (Appendix B, Section III, Item 3)
Tape, Anti-seize (Appendix C, Section II, Item 19)
Rags, Wiping (Appendix C, Section II, Items 14)
Lockwashers (TM 10-4610-241 -24P)
Locknuts (TM 10-4610-241-24P)
Timer removed (Paragraph 2-68.1).
Position backwash timer (1) on workbench, remove four screws (2) and open cover.
Marking liquid ports on stager, indicating if they have a plug, elbow or strainer installed
on them will facilitate reassembly. Be sure to transcribe this information to replacement
stager before discarding or turning it in to Supply.
Remove 90 Deg. connector (3), inlet strainer (4), plug (5) and five connectors (6) from bottom and side of
Tagging stager wires, indicating the terminal assembly contact to which they are
connected, will facilitate installation. Be sure to transfer tags to replacement stager
and/or wiring harness before discarding these items or turning them in to Supply.
Tag and disconnect stager wires from terminal assembly (8).
Remove four screws (9), flat washers ( 10) and lock nuts (11).
Remove stager (7).
Tag and remove the wires connecting the cover lights (12) to the terminal assembly (8).
Remove four screws ( 13) and four lockwashers (14) and remove back panel (15).
Remove three cover lights ( 12) by desoldering the wires, removing nut (16) and lockwasher (17) and push
3-272 Change 1