TM 5-3895-383-24 3. Check  all  oil  lines,  all  hoses,  and  all  connections  for damage and for leaks.  Look for oil on the ground under the machine. NOTE: If   oil   can   leak   out   of   a   fitting   or   out   of   a connection,  air  can  leak  into  the  system.    Air  in the system is as harmful as having too little oil. Vibratory System Troubleshooting SMCS Code:  6606-035 Personal injury or death can result from sudden machine movement. Sudden  movement  of  the  machine  can  cause  injury  to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine. Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped.  Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, oil is cool  before  removing  any  components  or  lines.    Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. NOTICE Care  must  be  taken  to  ensure  that  fluids  are  contained during  performance  of  inspection,  maintenance,  testing, adjusting and repair of the product.  Be prepared to collect the   fluid   with   suitable   containers   before   opening   any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose  of  all  fluids  according  to  local  regulations  and mandates. Operational Checks NOTE: Operate  the  machine  in  each  direction  and  in  all speeds.  Note the noises that are not normal and find the sources of the noises.  If the machine is not    operating    correctly,    refer    to    the    list    of problems and probable causes below. Probable Causes of Vibratory System Problems Problem The vibration system does not work in high amplitude or low amplitude. Probable causes The speed range switch is in the HIGH range. NOTE: Some machines may be wired in order to disable the vibratory system when the speed range switch is in the HIGH range. Fuse failure. NOTE: On machines that are equipped with the variable frequency  vibration  system,  an  additional  4  amp fuse is located in the control console. The  vibratory  on/off  control  on  the  propel  control  lever has failed. The   amplitude   selector   on   the   control   console   has failed. The electrical circuit has a fault. The alternator has failed. Low charge oil pressure. The solenoid valve on the vibratory pump has failed. The  rheostat  for  the  optional  variable   frequency   has failed. The optional variable frequency dial has failed. Mechanical failure of the vibrator mechanism. Problem Low charge oil pressure. Probable Cause There is a low oil level in the hydraulic tank. The hydraulic filter element is restricted. There is excessive case leakage in the pump and/or the motor. The gerotor charge pump has failed. The relief valve adjustment on the charge pump is not correct. 11-42