Getting a rebuilt diesel back together inside factory tolerances comes down to 32 pages in this Utilev NB485BPG operation and maintenance manual PDF (OEM ID 76502233), written for the NB485BPG engine alone. Construction chapters break down the head, block, piston and rod assembly, crankshaft, gear train, and the fuel, lubricating and cooling systems, plus wiring diagrams for the electrical system. The adjustment pages set valve lash, injection timing, the injector and the injection pump. Troubleshooting charts run from a no-start and heavy exhaust smoke to runaway speed, rising oil level and a dead alternator. Set injector pop pressure at 20.3 to 20.8 MPa, and look for 196 to 441 kPa of running oil pressure, never under 49 kPa at idle.
What's Inside This Operator Manual
| System | Pages | Key Topics |
|---|
| Technical Specifications | 3-8 | Performance Specifications, Technical Data, Full Load Characteristic Curve |
| Operation | 9-10 | Items to Be Taken Care of, Starting of the Engine |
| Maintenance | 11-12 | Daily Maintenance, Maintenance After Every 100 Hours Service, Maintenance After Every 500 Hours Service, Storage of the Engine |
| Construction | 13-21 | Cylinder Head, Cylinder Block, Piston-Connecting Rod Assembly, Crankshaft and Flywheel, Gear Train, Fuel System, Lubricating System, Cooling System |
| Adjustment | 22 | Valve Clearances, Injection Timing, Injector, Injection Pump |
| Trouble Shooting | 23-29 | Engine Fails to Start, Abnormal Lubricating Oil Pressure, High Exhaust Smoke, Insufficient Power, Abnormal Noise, Severe Vibration, Engine Over-Heated, High Oil Consumption |
| Matching Fits of Main Parts | 30-31 | Crank Journal, Connecting Rod Bearing, Piston Pin, Piston Ring, Camshaft Bushing, Valve Guide |
| Specifications of Main Auxiliaries | 32 | Lubricating Oil Pump, Injection Pump, Injector, Water Pump, Starter, Alternator |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Oil pressure | 196-441kPa | p. 4 |
| Oil pressure at idle speed | ≥49kPa | p. 4 |
| Opening pressure of the injector | 20.3-20.8 MPa | p. 4 |
| Fuel filter cartridge replacement interval | 1000 hours or 50,000km | p. 11 |
| Nozzle opening pressure and spray check interval | 200 hours | p. 11 |
| Thermostat check interval | 500 hours | p. 12 |
| Fuel filter replacement interval | 1000 hours | p. 18 |
| Cylinder Bore | 85mm | p. 3 |
| Stroke | 100mm | p. 3 |
| Intake and Exhaust Valve Clearances (Cooled State) | 0.28-0.33mm | p. 4 |
| Oil Sump Capacity | ≈7 liters | p. 4 |
