Worksheets - Troubleshoot
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| Chart For The Hydraulic Pump Troubleshooting | |||
|---|---|---|---|
| Date | Serial Number | ||
| Pressure Test And Test For The Flow Compensator | |||
| Item | Specification | Actual | |
| Standby Pump Discharge Pressure at 1200 rpm | 3750 ± 750 kPa (544 ± 109 psi) |
||
| Margin Pressure Test | 2200 ± 200 kPa (319 ± 29 psi) |
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| Chart For The Hydraulic Pump Troubleshooting | ||
|---|---|---|
| Date | Serial Number | |
| Tests For The Torque Limiter | ||
| Item | Specification | Actual |
| Hydraulic Oil Temperature | 65 °C (149 °F) |
|
| Flow | 120 to 140 L/min (31 to 37 US gpm) at 24800 kPa (3597 psi) |
|
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| Hydraulic System Pressure Tests | ||
|---|---|---|
| System | Specification | Actual |
| Backhoe | 26200 ± 700 kPa (3800 ± 102 psi) |
|
| Loader | 24400 ± 700 kPa (3539 ± 102 psi) |
|
| Steering | 18950 ± 1450 kPa (2749 ± 210 psi) |
|
| Pilot | 3450 ± 450 kPa (500 ± 65 psi) |
|
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| Specifications for Relief Valves | Actual | |
|---|---|---|
| Hydraulic Circuit | 450E | |
| Rod End for STICK OUT | 29000 kPa (4206 psi) |
|
| Head End for STICK IN | ||
| Extendable Stick (if equipped) | 27500 kPa (3989 psi) |
|
| Rod End for retracting the stick | ||
| Swing LEFT | 27500 kPa (3989 psi) |
|
| Swing RIGHT | ||
| Backhoe BUCKET DUMP | 27500 kPa (3989 psi) |
|
| Backhoe BUCKET CLOSE | ||
| BOOM RAISE | 34000 kPa (4931 psi) |
|
| BOOM LOWER | 16500 kPa (2393 psi) |
|
| Loader Rod End for the Dump Operation | 31500 kPa (4569 psi) |
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| Loader Rod End for the Dump Operation | 31500 kPa (4569 psi) |
|
| Head End for the Tilt Back Operation of the Loader | 26000 kPa (3771 psi) |
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| Auxiliary (if equipped) for the Loader | 24500 kPa (3553 psi) |
|
| Line valve for the Head End | ||
| Port B | ||
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| Test Specifications for Steering System | ||
|---|---|---|
| Test | Specification | Actual |
| Line Relief Pressure for front wheel steering | 23400 kPa (3394 psi) |
|
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| Maximum Implement Drift within 5 minutes | |||||||
|---|---|---|---|---|---|---|---|
| Cylinder | Tires off the ground | Tires on the ground | Actual | ||||
| Loader LIFT | 12 mm (0.5 inch) |
6 mm (0.24 inch) |
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| Loader TILT | |||||||
| Loader Bucket | |||||||
| Stabilizer | 5 mm (0.2 inch) |
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| Backhoe Boom | 5 mm (0.2 inch) |
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| Backhoe Stick | |||||||
| Backhoe Extendable Stick | |||||||
| Backhoe Bucket | 10 mm (0.4 inch) |
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| Auxiliary with Thumb | 5 mm (0.2 inch) |
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| Maximum Cycle Times for the Loader | |||||||
|---|---|---|---|---|---|---|---|
| Sales Model | 450E | Actual | |||||
| Lower (FLOAT) | 2.8 seconds | ||||||
| Raise (ground to stop) | 4.0 seconds | ||||||
| Bucket Dump | 2.3 seconds | ||||||
| Bucket Rack Back |
2.5 seconds | ||||||
| Bucket Open | 2.0 seconds | ||||||
| Bucket Close | 2.1 seconds | ||||||
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| Maximum Cycle Times for the Backhoe | |||||||
| Sales Model | 450E | Actual | |||||
| Boom Lower | 3.2 seconds | ||||||
| Boom Raise (ground to snubber) | 3.5 seconds | ||||||
| Bucket dump | 2.0 seconds | ||||||
| Bucket curl in | 3.0 seconds | ||||||
| Stick In | 4.1 seconds | ||||||
| Stick Out | 4.0 seconds | ||||||
| Swing (stop to snubber) | 3.8 seconds | ||||||
| Extendable stick (extend) | 3.4 seconds | ||||||
| Extendable stick (retract) | 2.8 seconds | ||||||
Caterpillar Information System:
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R3000H Load Haul Dump Machine Systems Accumulator Charging Valve (Brake) - Assemble
R3000H Load Haul Dump Machine Systems Accumulator Charging Valve (Brake) - Install