4-18. PUMP, PIPING, AND VALVES-Continued
4-18.13 Foam Metering Valve.
This task covers
Tool Kit, Master Mechanic,
All Piping Drained
Main Engine Shutdown (see para. 2-10)
APU shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
Foam Tank Valve Closed (see para. 2-11)
22, Appendix E Pipe Sealant
27, Appendix E Silicone Grease
00253530 Foam Metering Valve
There are two metering valves used on the truck. One is mounted in the cab, and the other is
mounted on the structural control panel.
Tag and remove the inlet (1) and the outlet hoses (2) from the
Remove two machine screws (3) that retain the handle (4) to the
extension plug (5).
Remove the two machine screws (6) that retain the body (8) and
dial (7) to the mounting bracket.
Remove the metering valve from the mounting bracket and
clamp in a vise.
Mark the position of the fittings prior to removal to
ensure proper assembly.
Remove the fittings (9) from the body (8).