TM-9-2320-280-10 HMMWV Operator Manual Download
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TM 9-2320-280-10 2-146 Change 1 c. During Operation. CAUTION Entering water too fast will cause water to splash up over hood and into air intake. The engine may stop abruptly and will not crank. Do not continue starting efforts; damage to engine will result. (1) Enter water slowly and maintain even vehicle speed while fording. (2) Exit water in area with gentle slope. NOTE • Hydrostatic lock is caused by the entry of substantial amounts of water into the engine through the air intake system and subsequent contamination of the fuel system. Hydrostatic lock most frequently occurs during or just after fording. Water is forced into the air intake system, is drawn into the engine, and effectively “locks-up” the engine. • Notify unit maintenance if you suspect hydrostatic lock and they will further test the engine. d. After Operation. WARNING Do not rely on service brakes after fording until the brakes dry out. Keep applying brakes until uneven braking ceases. Failure to do this may cause damage to vehicle or injury or death to personnel. NOTE If accumulated water drains slowly through floor drain holes, refer to unit maintenance for drilling and improving drain holes (1) If fording operation was through salt water, wash and wipe off all salt deposits as soon as possible. NOTE To prevent parking brake linkage from binding, lithium grease should be used after operating in mud. Clean mud, grit, and debris from linkage. Apply lithium grease (Appendix D, Item 10.1) and move linkage back and forth to work into joints. (2) Vehicles completing shallow water fording operation must be lubri- cated and serviced by unit maintenance as soon as possible. NOTE Perform steps 3 through 7 only if fording was in salt water. (3) Slide rubber boot (1) back and inspect slave receptacle (2) for evidence of corrosion, RTV wash out, or salt water penetration of RTV sealant. If any evidence of these conditions is found, report vehicle to unit maintenance for corrective action. Do not connect slave receptacle positive lead (4). (4) If no evidence of corrosion, RTV wash out, or salt water penetration of the RTV sealant is found, slide rubber boot (1) on slave receptacle (2).