Engine Performance - Test - Engine Speed
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| Required Tools | ||
|---|---|---|
| Part Number | Description | Qty |
| 1U-6602 | Photo-Tachometer | 1 |
- Position the machine on level ground.
- Stop the engine.
- Install a piece of reflective tape on the fan or a pulley on the engine.
- Start the engine.
- Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
- Read the engine speed display (rpm) on the photo-tachometer. Refer to Table 3 for the specifications for engine speed at the desired engine operation.
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| Engine Speed | |||
|---|---|---|---|
| Item | Specification | ||
| High Idle (2) | 2460 ± 30 rpm | ||
| Low Idle (2) | 1320 ± 25 rpm | ||
| One Touch Low Idle (2) | 1320 ± 25 rpm | ||
| Engine speed with load (3) | 2200 rpm (4) | ||
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| ( 2 ) | No load |
| ( 3 ) | Pressure is relieved from both pumps. |
| ( 4 ) | Minimum RPM |
Caterpillar Information System:
303C CR and 303.5C CR Mini Hydraulic Excavators Hydraulic System General Testing and Adjusting Information
303C CR and 303.5C CR Mini Hydraulic Excavators Hydraulic System Hydraulic System Pressure - Release
302.5C Mini Hydraulic Excavator Hydraulic System Swing Speed and Swing Drift on a Slope - Check
302.5C Mini Hydraulic Excavator Hydraulic System Machine Drift on a Slope - Check
302.5C Mini Hydraulic Excavator Hydraulic System Main Hydraulic Pump Air - Purge
302.5C Mini Hydraulic Excavator Hydraulic System Operational Checks
302.5C Mini Hydraulic Excavator Hydraulic System Swing Speed and Overswing on Level Ground - Check
302.5C Mini Hydraulic Excavator Hydraulic System Relief Valve (Line) - Test and Adjust
302.5C Mini Hydraulic Excavator Hydraulic System Specifications
302.5C Mini Hydraulic Excavator Hydraulic System Relief Valve (Main) - Test and Adjust
302.5C Mini Hydraulic Excavator Hydraulic System Relief Valve (Swing) - Test and Adjust
302.5C Mini Hydraulic Excavator Hydraulic System Relief Valve (Pilot) - Test and Adjust
302.5C Mini Hydraulic Excavator Hydraulic System Travel on Level Ground - Test
302.5C Mini Hydraulic Excavator Hydraulic System Cylinder Speed - Check
303.5E2 CR, 304E2 CR, 305E2 CR and 305.5E2 CR Mini Hydraulic Excavators Machine System Visual Inspection
302.5C Mini Hydraulic Excavator Hydraulic System Cylinder Drift - Check
303C CR and 303.5C CR Mini Hydraulic Excavators Hydraulic System Accumulator (Pilot) - Test and Charge
345C MHPU Mobile Hydraulic Power Unit Engine Supplement Engine - Install
C18 Generator Sets Cooling System Supplemental Coolant Additive (SCA) - Test/Add
390D Excavator Machine Systems Actuator Motor (Air Distributor) - Remove and Install
390D Excavator Machine Systems Blower Motor (Air Conditioner, Heater) - Remove and Install
324D, 325D, 326D and 329D Excavators and 329D MHPU Mobile Hydraulic Power Unit Machine Systems Heater Core - Remove
324D, 325D, 326D and 329D Excavators and 329D MHPU Mobile Hydraulic Power Unit Machine Systems Heater Core - Install
324D, 325D, 326D and 329D Excavators and 329D MHPU Mobile Hydraulic Power Unit Machine Systems Evaporator Coil - Remove