TM 9-2350-238-34-22-4. TROUBLESHOOTING INFORMATION (CONT).Table 2-1. DIRECT SUPPORT TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONBOOM (CONT)20. BOOM DROPS WHEN HOLDING LOAD IN NEUTRAL POSITION.Make sure all personnel stand clear when operating theboom to avoid injury to personnel.Step 1.Test boom for acceptable boom drop rates. Refer to page 2-84.If drop rate is faster than acceptable limits, go to step 2.Step 2. Check for leaking boom winch control cylinders.Replace or repair leaking boom winch control cylinders. Refer topage 2-84. Recheck boom drop rate. Refer to page 2-84.Step 3. Check for leaks in hydraulic lines and hoses.Tighten all loose connections. Replace damaged hydraulic linesand hoses. Refer to TM 9-2350-238-20-2. Recheck boom droprate. Refer to page 2-84.Step 4.Check for leaks around counterbalance manifold pressure relief valves.If leaks are found, replace damaged preformed packings. Referto page 2-154. Recheck boom drop rate. Refer to page 2-84.Step 5. Check adjustment of boom cylinder counterbalance valve. Refer to page2-179.If boom cylinder counterbalance valve cannot be adjusted,replace or repair pressure relief valve. Refer to page 2-163.Recheck boom drop rate. Refer to page 2-84.Step 6. Check adjustment of boom cylinder pressure relief valve. Refer to page2-179.If boom cylinder pressure relief valve cannot be adjusted,replace or repair boom cylinder pressure relief valve. Refer topage 2-154. Recheck boom drop rate. Refer to page 2-84.2-12
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business