Pressure Charts - Hydraulic Pressures and Implement Cycle Times
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| Hydraulic pressures specifications and engine speeds | |||
|---|---|---|---|
| Ensure that the hydraulic oil temperature 54° C (130° F) to 60° C (140° F) |
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| Circuit | Function | Engine RPM | Pressure |
| Main Circuit (Auxiliary Pump Circuit) | Standby Pressure | 1250 | 2100 kPa (305 psi) |
| Pump Compensator | 1250 | 31000 kPa (4495 psi) |
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| LS Relief | 1250 | 24200 kPa (3509 psi) |
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| Attachment Circuit | Standby Pressure | 1250 | 2100 kPa (305 psi) |
| Pump Compensator (1) | 1250 | 31000 kPa (4495 psi) |
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| Display Attachment Pressure Setting 553C | 1250 | 25900 kPa (3750 psi) |
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| Display Attachment Pressure Setting 563C | 1250 | 29000 kPa (4200 psi) |
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| Display Attachment Pressure Setting 573C | 1250 | 30700 kPa (4450 psi) |
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| Saw Disc Speed (RPM) (If equipped with Saw) | |||
| Fan Circuit | Standby Pressure | 1250 | 1500 kPa (218 psi) |
| Pump Compensator (2) | 28300 kPa (4100 psi) |
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| Minimum Fan Speed (Approximately) The hydraulic oil must be 77° C (170° F) minimum to perform this test. |
2050 RPM Fan Speed | ||
| Engine ( 563C/ 573C) | Low RPM | 800 | |
| Rated RPM | 1800 | ||
| Engine ( 553C) | Low RPM | 800 | |
| Rated RPM | 2200 | ||
| Drivetrain Circuit | Front Differential Lock | 1250 | 2600 kPa (377 psi) |
| Rear Differential Lock | 1250 | 2600 kPa (377 psi) |
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| Parking brake Pressure | 1250 | 2600 kPa (377 psi) |
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| Service Brake Pressure (Max) | 1250 | 5500 kPa (800 psi) |
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| Accumulator Pressure after charge | 1250 | 20700 kPa (3000 psi) |
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| Front Brake Manifold Pressure | 1250 | 11000 kPa (1600 psi) |
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| Charge Pressure in Neutral | 1450 | 2400 kPa (348 psi) |
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| Charge Pressure (Forward / Reverse) Instroke | 1450 | 2100 kPa (305 psi) |
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| Shift Pressure ( 553C/ 563C) FLAT | 1250 | 24100 kPa (3500 psi) |
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| Shift Pressure ( 553C/ 563C) HILL | 1250 | 22100 kPa (3200 psi) |
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| Shift Pressure ( 573C) FLAT | 1250 | 25900 kPa (3750 psi) |
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| Shift Pressure ( 573C) HILL | 1250 | 23800 kPa (3450 psi) |
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| Propel Port Forward or Reverse (A or B) | 1250 | 37400 kPa (5423 psi) |
|
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| ( 1 ) | Refer to Testing and Adjusting, "Piston Pump (Attachment) High Pressure Cutoff - Test and Adjust" for detailed information. The compensator is set with the IQAN at 100% for all machines. The IQAN percentage is adjusted for the individual sales model. |
| ( 2 ) | Refer to Testing and Adjusting, "Piston Pump (Hydraulic Fan) Pressure - Test and Adjust" (Fan Speed) |
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| Implement Cycle Times | ||
|---|---|---|
| Circuit | Function | Time |
| Attachment and Steering | Gather Open | 0.75 Seconds |
| Gather Close | 1.00 Seconds | |
| Bunching Finger Open | 0.85 Seconds | |
| Bunching Finger Close | 1.00 Seconds | |
| Steering Side to Side | 3.30 Seconds | |
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| Cylinder Drift Rates | ||
|---|---|---|
| Lab Test Ambient Hydraulic Fluid 18.3° C (65° F) |
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| Lift Cylinder | ||
| Viscosity of CAT 10W Hydro Advanced Oil | 229 centistokes | 0.35495 in2/sec |
| Start Lift Cylinder Rod Distance | 251 mm (9.87 inch) |
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| End Lift Cylinder End Distance | 163 mm (6.43 inch) |
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| Time | 2000 seconds | |
| Lit Rod Rate | 0.00172 inches/sec | |
| Lift Rod Rate | 0.1032 inches/min | |
| Lift Rod Rate | 6.2 inches/hr | |
| Tilt Cylinder | ||
| Lab Test Ambient Hydraulic Fluid 18.3° C (65° F) |
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| Viscosity of CAT 10W Hydro Advanced Oil | 229 centistokes | 0.35495 in2/sec |
| Start Tilt Cylinder Rod Distance | 216 mm (8.5 inch) |
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| End Lift Cylinder Rod Distance | 267 mm (10.5 inch) |
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| Time | 2000 sec | |
| Tilt Rod Rate | 0.00100 inch/ssec | |
| Tilt Rod Rate | 0.05998 inches/min | |
| Tilt Rod Rate | 3.6 inches/hr | |
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| Cylinder Drift Rates | ||
|---|---|---|
| Field Test Ambient Hydraulic Fluid 58° C (136° F) |
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| Lift Cylinder | ||
| Viscosity of CAT 10W Hydro Advanced Oil | 21 centistokes | 0.03255 in2/sec |
| Distance Moved | 28.6 mm (1.125 inch) |
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| Time | 600 seconds | |
| Lit Rod Rate | 0.001875 inches/sec | |
| Lift Rod Rate | 0.1125 inches/min | |
| Lift Rod Rate | 6.8 inches/hr | |
| Tilt Cylinder | ||
| Field Test Ambient Hydraulic Fluid 58° C (136° F) |
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| Viscosity of CAT 10W Hydro Advanced Oil | 21 centistokes | 0.03255 in2/sec |
| Distance Moved | 19 mm (0.75 inch) |
|
| Time | 600 seconds | |
| Lit Rod Rate | 0.00125 inches/sec | |
| Lift Rod Rate | 0.075 inches/min | |
| Lift Rod Rate | 4.5 inches/hr | |
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| Illustration 1 | g02840296 |
(1) Auxiliary pump pressure tap (2) Charge pump pressure tap (3) Propel "Min" displacement pressure tap (4) Propel "Max" displacement pressure tap (5) Attachment pump pressure tap (6) "B" port Propel Motor (7) "A" port Propel Motor | |
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