TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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3-9. CRANKCASE DEPRESSION REGULATOR (CDR) VALVE AND BRACKET MAINTENANCE This task covers: a. Testing c. Cleaning and Inspection b. Removal d. Installation b. Removal NOTE CDR valves on vehicles equipped with deep water fording kit contain two additional vent lines. 1. Loosen clamp (5) and disconnect CDR valve oil fill tube hose (4) from CDR valve (7). 2. Remove two screws (1), washers (2), and CDR valve (7) from CDR valve bracket (3) and intake crossover hose (6). 3. Remove two nuts (9) from CDR valve bracket (3) and intake manifold studs (10). 4. Remove two nuts (8) and CDR valve bracket (3) from two valve cover studs (11). 1. Remove engine oil dipstick from oil dipstick tube (para. 3-2). 2. Install manometer in dipstick tube. 3. Connect STE/ICE-R unit to DCA connector. NOTE To read manometer pressure, add amount the water travels in column above zero to the amount the water travels in column below zero. 4. Start engine and let idle; record water pressure. Pressure should be zero inches of water, or a slight vacuum. 5. Increase engine speed to 2,000 rpm; record water pressure. Pressure should be 2-5 in. 6. If pressures are not within specifications in steps 4 and 5, replace CDR valve (7) and repeat test. 7. Install engine oil dipstick in oil dipstick tube (para. 3-2). INITIAL SETUP: Test Equipment Manometer, U-tube (Appendix B, Section IV, Item L) Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Maintenance and repair shop equipment: automotive (Appendix B, Item 2) Manual References TM 9-2320-387-10 TM 9-2320-387-24P Equipment Condition • Hood raised and secured (TM 9-2320-387-10). • Engine access cover removed (para. 10-22). Maintenance Level Unit TM 9-2320-387-24-1 3-16 Change 1 a. Testing