With the head off and valve lash to set in the next hour, you want the Utilev A490BPG operation and maintenance manual PDF on the bench: 40 pages, OEM ID 76502232, covering the 490B diesel engine and its 2.54 L A490BPG variant. Sketch maps trace the fuel, lubricating, cooling, gear train and electrical systems, and the adjustment chapter walks through the cylinder head bolt tightening sequence, valve clearances, injection timing and injection pump setup. Troubleshooting entries cover no-start, black, blue or white smoke, abnormal oil pressure, runaway speed and a rising oil level. Set injector pop pressure to 20.3 to 20.8 MPa, and tension the drive belt to 10 to 15 mm of deflection under 29 to 49 N at mid-span. Bookmarks and a searchable text layer take you to the head bolt sequence, and quoting 76502232 when you order gets you the right book the first time.
What's Inside This Operator Manual
| System | Pages | Key Topics |
|---|
| General Description of Diesel Engine | 1-5 | Engine Model Types and Serial Numbers, Engine Performance Curves, Engine Technical Performance Data, Main Characteristic Data, Overall Dimensions of Diesel Engine |
| Operation of the Diesel Engine | 6-10 | Preparation, Starting, Operation, Shutting Down, Working Media |
| Technical Maintenance of the Diesel Engine | 11-14 | Maintenance Tools, Maintenance Periods, Technical Maintenance in Winter, Storage for the Engine |
| Adjustment of the Diesel Engine | 15-20 | Tightening Sequence of Cylinder Head Bolts, Checking and Adjustment of Driving Belt, Notes About Thermostat, Starter, Generator, Expelling Air From Fuel System |
| Sketch Maps for Five Main Systems of the Diesel Engine | 21-25 | Fuel System, Lubricating System, Cooling System, Gear Train System, Electrical System |
| Engine Trouble Shooting | 26-40 | Engine Fails to Start, Abnormal Oil Pressure, High Black Exhaust Smoke, Blue Exhaust Smoke, High White Exhaust Smoke, Insufficient Power, Abnormal Noise, Severe Vibration |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Starter voltage | 12V | p. 17 |
| Starter power | 2.5kW | p. 17 |
| Driving belt tension | 10-15mm deflection at 29-49N force | p. 16 |
| Injector pressure | 20.3-20.8MPa | p. 20 |
| Total displacement | 2.54L | p. 3 |
| Rated power | 36.8kW | p. 3 |
| Oil capacity in the oil sump | 6L | p. 4 |
| Cold valve clearance (intake) | 0.35mm | p. 4 |
| Cold valve clearance (exhaust) | 0.45mm | p. 4 |
| Cylinder head bolt tightening torque | 117.6-137.2 N·m | p. 4 |
| Main bearing bolt tightening torque | 137.2-156.8 N·m | p. 4 |
| Connecting rod bolt tightening torque | 98.1-117.6 N·m | p. 4 |
