TM  10-3930-638-24&P 1-25.   HYDRAULIC   LIFT   SYSTEM   (cont) Includes fitting at top for bleeding air from system. 6.  ROTATION  CYLINDER.  One  used.  Activated  by control valve. Rotates forks 10 degrees minimum clockwise and counterclockwise from horizontal position. 7.  HYDRAULIC  RESERVOIR.  Integral  part  of  rear chassis; capacity is approximately 40 quarts. Located to rear of operator’s seat; return oil filtered by 10 micron filter. Breather and oil tiller located at top of reservoir; oil screen located at bottom of reservoir in oil suction line. 8. HYDRAULIC PUMP. Mounted on rear of, and driven  by,  transmission;  also  provides  hydraulic  power  for steering system and service brakes. 11.4 gallon-per-minute capacity. 2500 PSI relief valve provided in hydraulic system  to  limit  pump. 9.  HYDRAULIC  FILTER.  Ten  micron  filter;  filters return oil. Located at rear of hydraulic reservoir. When clogged, HYDRAULIC FILTER indicator on instrument panel illuminates. Equipped with automatic bypass; opens at not less than 2 PSI and permits full flow at 3.5 PSI. 10. HYDRAULIC SCREEN. Located at bottom of hydraulic  reservoir  in  hydradic  pump  suction  line.  Filters hydraulic  oil  before  it  reaches  hydraulic  pump. 11.  LIFTING  FORKS.  Two  used;  40  inch  forks. Constructed  of  heavy-duty  steel. 12.  LIFT  CHAINS.  Two  used;  connected  at  one  end  to ^— inner  mast,  reeved  over  chain  rollers  and  connected  at other end to carriage. Chains raise carriage. 13. MAST ASSEMBLY. Raises and lowers carriage by means of lift chains. Free lift height (height of forks without increased mast height) is not less than 48 inches. Consists  of  outer  and  inner  mast.  Includes  mast  latch pin used to latch outer and inner mast between zero to 12 inches height of lifting forks; disengages at over 12 inches height of lifting forks. Ensures free lift travel of not less than 48 inches. 1-14