able 2-l. Unit Level Preventive Maintenance Checks and Services HMMWV(Cont’d)

TM 9-2320-387-24-l Table 2-l. Unit Level Preventive Maintenance Checks and Services HMMWV(Cont’&. ITEM INTERVAL ITEM TO BE PROCEDURES NOT FULLY MISSION NO. INSPECTED CAPABLE IF: 15 Semi- Transfer annually CAUTION Case (Cont’d) Use Dexrone III for filling transfer case. Failure to use Dexrone III may cause damage to transfer case. c. Check transfer case fluid level every 3,000 mi (4,800 km) or semiannually, whichever occurs first. Remove fill plug and gasket. Level should he within l/2 in. (12.7 mm) of fill plug opening when vehicle is on level ground. Install fill plug and gasket, and tighten to 35 lbft (47 N-m). DRAIN PLUG CHECK AND FILL PLUG NOTE Do not over-torque retaining nuts. d. Inspect oil cooler lines for leaks. Check d. Any class III oil for loose oil cooler line nuts. If loose, hold leak. oil cooler line stationary and, using a pound-inch torque wrench, tighten line nuts to 192-216 lb-in. (22-24 N-m). 2-16