TM 5-3895-383-24 Illustration 72 Charge Relief Valve (2) Charge Relief Valve. 1. Make sure that the parking brake is applied.  Make sure that the propel control lever is in NEUTRAL position. 2. Connect   a   4000   kPa   (580   psi)   pressure   gauge   to pressure test port (1) next to the propel charge filter. 3. Start the engine.  Run the engine at high idle.  Check the  pressure  gauge.    The  setting  for  the  charge  relief valve should be 2900 ± 140 kPa (420 ± 20 psi). Illustration 73 Charge Relief Valve (3) Shim. 4. The charge relief valve must be adjusted if the pressure setting   is   incorrect   In   order   to   adjust   the   charge pressure, stop the engine and remove the charge relief valve from the drum propel pump. 5. If the charge pressure is too low, add shims (3) to the charge  relief  valve.    If  the  charge  pressure  is  too  high, remove shims (3) from the charge relief valve. NOTE: When  the  shims  are  added  to  the  charge  relief valve, a 1 mm (0.04 inch) shim is the equivalent of reducing  the  charge  pressure  by  390  kPa  (56.5 psi).      When   the   shims   are   removed   from   the charge  relief  valve,  a  1  mm  (0.04  inch)  shim  is equal  to  raising  the  charge  pressure  by  390  kPa (56.5 psi). 6. Reinstall the charge relief valve. 7. Perform  this  test  again  in  order  to  verify  the  charge pressure after the adjustments have been made. 8. Remove the pressure gauge from the test port. Parking Brake - Test SMCS Code:  4267-081 Table 14 Required Tools Part Number Description Quantity 8T-0861 Pressure Gauge 60000 kPa (8700 psi) 1 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. 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 Product Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose  of  all  fluids  according  to  local  regulations  and mandates. 10-69