Operational Checks
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To prevent personal injury when checks are made while the machine is in operation, make sure only approved personnel are on the machine. Keep other personnel off the machine and in view of the operator. Make sure checks are done in an open area. |
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The operation checks can be used to find leakage in the hydraulic system. Also, the operation checks can be used to find failed valves or a failed hydraulic pump.
Make sure that the machine is resting on a smooth, level surface. The machine should be moved away from other operating machines and away from personnel.
- Start the engine. Move the hydraulic lockout control to the UNLOCKED position.
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| Illustration 1 | g00827520 |
Older models | |
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| Illustration 2 | g01162712 |
Newer models | |
- Increase the hydraulic oil temperature to 55 ± 5°C (130 ± 10°F).
- Extend the implement cylinders and retract the implement cylinders several times. Allow the implement cylinders to travel full stroke in each direction.
- Watch the cylinder as the cylinder is extended and retracted. The movement of the cylinder must be smooth and regular.
- Move the joysticks to the HOLD position.
- Observe the display monitor for any fault codes. If a fault code exists, fix the fault before you troubleshoot the hydraulic system.
- Shut off the engine.
Pressure Specifications
Implement Control Valve
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| 242-4236 Bank Valve (Seven (Felling Head or Intermittent Saw)) | |||||||
| Function | Boom | Stick | Tilt | Swing | Grapple arms | Tool | Accumulator arms |
| Line Relief Setting | 35000 kPa (5080 psi) |
35000 kPa (5080 psi) |
35000 kPa (5080 psi) |
35370 kPa (5130 psi) (1) |
28000 kPa (4060 psi) |
35000 kPa (5080 psi) |
28000 kPa (4060 psi) |
| Line Relief Setting | 35000 kPa (5080 psi) |
35000 kPa (5080 psi) |
35000 kPa (5080 psi) |
35370 kPa (5130 psi) (1) |
28000 kPa (4060 psi) |
35000 kPa (5080 psi) |
28000 kPa (4060 psi) |
| Flow Rate Port B |
25 L/min (6 US gpm) |
35 L/min (9 US gpm) |
200 L/min (52 US gpm) |
190 L/min (50 US gpm) |
200 L/min (52 US gpm) |
210 L/min (55 US gpm) |
200 L/min (52 US gpm) |
| Flow Rate Port A |
190 L/min (50 US gpm) |
260 L/min (68 US gpm) |
200 L/min (52 US gpm) |
190 L/min (50 US gpm) |
200 L/min (52 US gpm) |
153 L/min (40 US gpm) |
200 L/min (52 US gpm) |
| Signal Limiter Valve | - | - | 27600 ± 500 kPa (4000 ± 70 psi) |
33800 ± 500 kPa (4900 ± 70 psi) |
23300 ± 500 kPa (3380 ± 70 psi) |
- | 23300 ± 500 kPa (3380 ± 70 psi) |
| Signal Limiter Valve | - | - | 27600 ± 500 kPa (4000 ± 70 psi) |
33800 ± 500 kPa (4900 ± 70 psi) |
23300 ± 500 kPa (3380 ± 70 psi) |
- | 23300 ± 500 kPa (3380 ± 70 psi) |
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| ( 1 ) | The relief valves are located on the swing motor. |
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| 242-4239 Bank Valve (Six (Harvester Head)) | ||||||
| Function | Boom | Stick | Rotator | Swing | Supply Harvester Head |
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| Line Relief Setting | 35000 kPa (5080 psi) |
35000 kPa (5080 psi) |
23000 kPa (3335 psi) |
33800 kPa (4900 psi) (1) |
- | - |
| Line Relief Setting | 35000 kPa (5080 psi) |
35000 kPa (5080 psi) |
23000 kPa (3335 psi) |
33800 kPa (4900 psi) (1) |
- | - |
| Flow Rate | 20 L/min (5 US gpm) |
20 L/min (5 US gpm) |
105 L/min (28 US gpm) |
190 L/min (50 US gpm) |
0 | 0 |
| Flow Rate | 160 L/min (42 US gpm) |
160 L/min (42 US gpm) |
105 L/min (28 US gpm) |
190 L/min (50 US gpm) |
190 L/min (50 US gpm) |
190 L/min (50 US gpm) |
| Signal Limiter Valve | - | - | 21000 kPa (3045 psi) |
32500 kPa (4700 psi) |
- | - |
| Signal Limiter Valve | - | - | 21000 kPa (3045 psi) |
32500 kPa (4700 psi) |
27500 kPa (4000 psi) |
27500 kPa (4000 psi) |
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| ( 1 ) | The relief valves are located on the swing motor. |
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| Control Valves | ||
| Function | Implement | Travel |
| Main Relief Valve (Load Sensing) | The relief valve is not used. (1) Felling Head Bottom Out (1) (Harvester Head) |
35500 ± 690 kPa (5150 ± 100 psi) |
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| ( 1 ) | Use the relief valve on the travel control valve to set the main relief pressure for the system. |
Travel Control Valve
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| 242-4238 Control Valve | ||||
| Function | Left Travel | Side Leveling | Forward Leveling | Right Travel |
| Flow Rate (A) | 240 L/min (63 US gpm) |
110 L/min (30 US gpm) |
110 L/min (30 US gpm) |
240 L/min (63 US gpm) |
| Flow Rate (B) | 240 L/min (63 US gpm) |
110 L/min (30 US gpm) |
110 L/min (30 US gpm) |
240 L/min (63 US gpm) |
| Signal Limiter Valve | - | 22300 ± 500 kPa (3235 ± 70 psi) |
22300 ± 500 kPa (3235 ± 70 psi) |
- |
| Signal Limiter Valve | - | 22300 ± 500 kPa (3235 ± 70 psi) |
22300 ± 500 kPa (3235 ± 70 psi) |
- |
Control Valve (Intermittent Saw)
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| 242-4240 Control Valve | ||
| Function | Saw | Saw |
| Flow Rate (A) | 240 L/min (63 US gpm) |
240 L/min (63 US gpm) |
| Flow Rate (B) | 240 L/min (63 US gpm) |
240 L/min (63 US gpm) |
| Signal Limiter Valve | 26000 kPa (3770 psi) |
26000 kPa (3770 psi) |
| Signal Limiter Valve | 26000 kPa (3770 psi) |
26000 kPa (3770 psi) |
Main Pumps
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| Standby Pressure | 2500 kPa (360 psi) |
| Margin Pressure | 2500 kPa (360 psi) |
Saw Pump
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| Pump Compensator Pressure (Cutoff) | 31000 kPa (4500 psi) |
| Load Sensing Pressure | 2000 kPa (290 psi) |
Pilot Pump
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| Pump Delivery Pressure | 4120 ± 135 kPa (600 ± 20 psi) |
| Relief Valve Pressure | 4120 ± 135 kPa (600 ± 20 psi) |
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