Is orifice screw or orifice
filter (if equipped) free of
v4. SPARE TIRE RETAINER DOES NOT LOWER
Clean orifice screw
and/or replace orifice
filter (if equipped).
2-2118.6 Change 1
Engine shut down (TM 9-2320-365-10).
Air tanks drained (TM 9-232-365-10).
Rag, Wiping (Item 51, Appendix D)
Filter Element, Fluid (Item 14.1, Appendix G)
REASON FOR QUESTION
If orifice screw and/or orifice
filter (if equipped) is clogged,
spare tire may not lower.
Air/hydraulic power unit oil
Air/hydraulic power unit
Hydraulic and air hoses OK.
Air tanks charged.
Hydraulic oil filter OK.
Other hydraulic manifold
Debris in orifice filter (if
Debris in orifice screw.
Faulty hydraulic manifold
SPARE TIRE valve.
Faulty spare tire retainer
Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Pan, Drain (Item 24, Appendix C)
Goggles, Industrial (Item 15, Appendix C)
Transmitter, Pressure (Item 1, Appendix J)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)
Key, Socket Head Screw (Item 35.1, Appendix B)
Vehicles S/N 0001 through 7558, with hydraulic manifold
P/N HFC32598, were not originally equipped with an orifice
filter. However, an orifice filter may have been installed
during previous maintenance to the hydraulic manifold.
on following page.