MACHINE AR 2754050 - Caterpillar

Illustration 13 g03646307
Located on the right side of the machine in the pump compartment. (1) Actuator piston (mechanical zero) (2) Swing brake adjustment (3) Regulator valve (throttle spool piston) (4) Swing pump line relief valve (5) Supply oil to swing motor for right swing (6) Swing pump purge (7) Charge pressure valve (8) Pressure cutoff valve (9) Supply oil to swing motor for left swing (10) Swing pump line relief valve (11) Swing pump line relief pressure sensor (12) High-pressure cutoff valve (13) Case drain (to swing motor)Swivel
Illustration 14 g03646311
(1) Return (2) Grease (3) Supply (4) Load Sense (5) Supply (6) Return (7) Case Drain (8) Hydraulic and grease passesTravel Motor
Illustration 15 g03646312
Travel motor (1) Main pump maximum displacement (2) Line relief valve reverse (3) Line relief valve forward (4) Main pump minimum displacement (5) Upstroke pressure (6) Destroke pressureComponent Specifications
Table 1
Specifications    
   Machine Model    
MH3037
Full line Relief Pressure     Line relief valve     Boom Cylinder     Head End    
36,542 kPa (5,300 psi)    
Rod End
24,821 kPa (3,600 psi)
Stick Cylinder Head End    
36,542 kPa (5,300 psi)    
Rod End
Steering Cylinder
27,993 kPa (4,060 psi)    
Pressure Relief Valve     Signal limiter     Boom Cylinder     Head End     Maximum    
Rod End
9,653 to 10,342 kPa (1,400 to 1,500psi)
Stick Cylinder Head End Maximum
Rod End
Steering Cylinder
20,684 kPa (3,000 psi)    
Grapple cylinder Head End (close)
t 22,063 to 22,753 kPa (3,200 to 3,300 psi)
Rod End (open)
14,479 to 15,169 kPa (2,100 to 2,200 psi)
Grapple rotate
14,479 to 15,169 kPa (2,100 to 2,200 psi)    
Cab riser cylinders (up/down/for/aft)
23,442 to 24,132 kPa (3,400 to 3,500 psi)    
Main Pump     Margin pressure (1)    
2,344 to 2,413 kPa (340 to 350 psi)    
Load Sensing Signal Limiter Pressure     Upper    
32,750 to 32,923 kPa (4,750 to 4,775 psi)    
Lower
32,750 to 32,923 kPa (4,750 to 4,775 psi)    
Warming manifold
16,547 to 17,237 kPa (2,400 to 2,500 psi)    
Pilot     Pilot pressure    
4,068 kPa (590 psi)    
Upper Main Control Valve     Differential Relief    
2,896 to 2,999 kPa (420 to 435 psi)    
Hydraulic System Back Pressure     Front Back Pressure Manifold (Hydraulic Oil Cooler)    
586 to 621 kPa (85 to 90 psi)    
Rear Back Pressure Manifold (Hydraulic Oil Tank)
793 to 862 kPa (115 to 125 psi)    
Lowering Control Valves (Boom and Stick)    
36,542 kPa (5,300 psi)    
Swing     Charge pump pressure    
2,827 to 2,896 kPa (410 to 420 psi)    
Brake pressure
2068 to 2413 kPa (300 to 350 psi)    
Pressure over ride
37,576 to 37,921 kPa (5,450 to 5,500 psi)    
Relief port valve (A and B)
41,024 to 41,369 kPa (5,950 6,000 psi)    
Generator     Generator speed     1750 rpm    
Generator pump compensator
27,579 kPa (4,000 psi)    
( 1 ) Margin pressure is calculated with the main pumps at standby.