TM 9-2350-256-34-2Section V. ADJUSTMENT AND LOAD TEST PROCEDURES FOR THE MAIN WINCH, HOIST WINCHAND LIVE BOOM CAPABILITY2-20. Adjustment and Load Test of MainNOTEValves are adjusted by vehicle manufacturer. Should verification of adjustment berequired, these procedures shall be used.a. General. The main winch has an inhaul capacity of 90,000 pounds maximum, using a single part line on bare drum(3 to 5 wraps minimum of cable on bare drum and not to exceed the first layer). The main winch combination controlvalve shall be adjusted by the following procedures so that main winch will have a capacity as specified.b. Vehicle Preparation. Prior to adjusting main winch combination control valve, the following shall be accomplished:WARNINGTest components (pressure gages, hoses, and fittings) must be capable ofwithstanding a working pressure of 1950 to 2050 psi.Step 1 Install pressure gage (NSN 4910-00-766-3355) in level wind gage port (figure 2-3).NOTEDo not adjust brake if anchoring cable.Step 2 Place load on winch. Use load cell if available and anchor. If load cell is unavailable, attach winch cable to ananchoring device or adjust winch brake full tight. (Refer to TM 9-2350-256-20 for brake adjustment procedure.)Figure 2-3. Main winch level wind gage port.Step 3 If using anchor or winch brake, use adjusting screw on main combination control valve (figure 2-4) to reducepressure as far as possible. Turning in counterclockwise direction will decrease pressure.Figure 2-4. Main winch combination control valve adjusting screw.Step 4 Set engine speed at 1600-1800 rpm.NOTEThe adjustment and load test shall be accomplished with the hydraulic reservoir oiltemperature at 100F to 130F.TA171824Change 42-28
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