Case CX75SR TIER 3 - Swing Unit; Travel Lower Body

Lep SC75SRCX80-1002-0NA Issued 03-08
1002-21
Swing unit
Swing circle........................................................................................................... Swing bearing type (with internal gear)
Swing hydraulic motor..................................................................................................... Fixed displacement piston motor
Reduction gear....................................................................................................... Planetary gear 2-stage reduction gear
Swing parking brake................................................................................ Mechanical lock (operational lever linkage type)
Displacement .............................................................................................................................................44.1 cm
3
/rev
Operating pressure ........................................................................................................................ 22.6 MPa (3280 psi)
Operating flow................................................................................................................................... 68 L/min (18 gpm)
Mechanical brake torque ...................................................................................................174.1 Nm (1540.7 lb-ft) min.
Brake off pressure .................................................................................................................4.9 MPa (710.68 psi) max
Relief valve set pressure ....................................................... 22.6 ± 0.3 MPa at 57.5 L/min (3280 ± 44 psi at 15 gpm)
Reduction gear....................................................................................................... Planetary gear 2-stage reduction gear
Reduction ratio.....................................................................................................................................................20.615
Travel lower body
Travel hydraulic motor (x2) ......... Variable displacement piston motor, automatic 2-speed switch-over with parking brake
Displacement ..................................................................................................................................... 48.0/30.5 cm
3
/rev
Operating pressure ........................................................................................................................ 29.4 MPa (4260 psi)
Operating flow................................................................................................................................ 68.0 L/min (18 gpm)
Brake torque ..............................................................................5.54 KNm (40.86 Ib-ft) min. (including reduction gear)
Relief valve set pressure...................................................................... 38.25 ± 1.45 MPa at 15 L/min (5550 ± 210 psi)
Automatic 2-speed switch-over pressure.......................................................... 23.8 MPa at 3.9 MPa (3450 at 570 psi)
Reduction gear....................................................................................................... Planetary gear 2-stage reduction gear
Reduction ratio.......................................................................................................................................................45.97
Travel brake.................................................................................................................................................. Hydraulic lock
Parking brake ................................................................................................... Mechanical lock (travel lever linkage type)
Track shoe
Model ........................................................................................................................Assembly type triple grouser shoe
Number of shoes (per side) ........................................................................................................................................39
Shoe width
Standard....................................................................................................................................... 450 mm (17.72 in)
Optional ....................................................................................................................................... 600 mm (23.62 in)
Grouser height...................................................................................................................................... 20 mm (0.79 in)
Link pitch............................................................................................................................................. 154 mm (6.06 in)
Roller
Number of upper rollers (per side)................................................................................................................................1
Number of lower rollers (per side) ................................................................................................................................5
Track belt tension adjuster ...............................................................................Grease cylinder type (with cushion spring)
Mounting length of spring ................................................................................................................. 402 mm (15.83 in)