A refuse compactor parked halfway up a landfill cell backs up every truck at the gate, and forum guesses will not get it moving. This 250-page Bomag BC 771 RS, BC 571 RB, BC 671 RB, BC 771 RB, BC 670 RB, BC 671 RS, BC 670 RS service training PDF, factory document 008 098 86, is the service book Bomag wrote for all seven machines. Wiring diagrams trace the BC 771 RS electrics from the junction box through engine plugs X17 and X18, and hydraulic schematics map the closed-loop travel circuit from pump control to travel motor. Troubleshooting tables work through the Cummins diesel, travel system, working hydraulics and central lubrication. Torque your scraper fastenings to 628 Nm; spin on a 12 micron charge oil filter, not whatever the shelf holds. Guess wrong on a travel pump and you buy the teardown twice. Bookmarked and text-searchable, this download puts the machine back on the cell.
What's Inside This Bomag BC 571–771 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Documentation | 6-7 | Index of Related Bomag Publications (Each Sold Separately) |
| General | 8-9 | - |
| Maintenance | 10-18 | Maintenance Table, List of Components Bc 571/671/771 Rb, List of Components Bc 671/771 Rs, Technical Data |
| Diesel Engine | 19-54 | External Engine Parts, Exhaust Side, Turbo Charger, Fuel System, Electronic Engine Speed Control Centry, Individual Centry Components, Lubrication Oil System, Coolant System |
| Travel System | 55-105 | Hydraulic System, Travel Pump, Connection Overview of Pump Unit, Pump Control, Closed Circuit, Travel Motor, Charge Circuit Filtration, Return Flow Filter Block |
| Working Hydraulics | 106-116 | Steering and Working Pump, Steering Control, Load-Sensing, Dozer Blade Control, Trouble Shooting Working Hydraulics |
| Electric System BC 771 RS | 117-152 | How to Proceed in Case of an Electric Fault, Junction Box (Roose Box), Power Supply, Starting, Plug X8, Engine Plugs X17 and X18, Engine Speed Control MTA11 C370 Cummins, Monitoring Board |
| Lubrication System | 153-177 | System Design, Technical Description, Duty Cycle, Pause, Test Run, Lubrication Process, Lubrication Points, Monitoring the Function |
| Air Conditioning | 178-250 | Physical Principles, Boiling Point, Refrigerant Circuit, Bomag Refuse Compactor Refrigerant Circuit, Components, Emptying the Air Condition System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Scraper fastening torque | 628 Nm | p. 12 |
| Charge oil filter rating | 12 micron | p. 18 |
| Return flow filter rating | 80 micron | p. 18 |
| Injection nozzle adjustment screw tightening torque (without torque wrench adapter) | 61 Nm | p. 42 |
| Engine speed | 2100 min-1 | p. 96 |
| High pressure gauge | 600 bar | p. 95 |
| BC 771 RS | ||
| Engine Power (ISO 9249) | 266 kW | p. 17 |
| Valve Clearance (Inlet) | 0,36 mm | p. 17 |
| Valve Clearance (Outlet) | 0,69 mm | p. 17 |
| Engine Coolant Capacity | 44 L | p. 18 |
| Engine Oil Capacity | 36,6 L | p. 18 |
| Hydraulic Oil Capacity | 350 L | p. 18 |
| AC Refrigerant Capacity | 1850 g | p. 18 |
| BC 671/771 RB/RS | ||
| Hydraulic Oil Change Interval | 2000 hours | p. 13 |
Bomag BC 571–771 Series Common Problems This Manual Covers
Bomag BC 771 RS drives slow and weak, won't climb the waste slope at full engine speed
Warm the hydraulic oil to 50 °C, then connect a 60 bar gauge to the charge pressure test port shown on page 95. Run the engine at 2100 min-1 per page 96 and read charge pressure in both travel directions. Low readings point to a plugged 12 micron charge filter element; replace it and retest.
Manual Section: Trouble shooting travel system p. 95Hydraulic oil overheats after an hour of pushing refuse up the working face
Check the cooler core first; refuse fluff packs the fins fast on a landfill cell. Blow it out with compressed air, then confirm both cooler hoses warm evenly toward 70 °C as described on page 94. If oil still runs hot, inspect the charge circuit filter; its by-pass valve opens at 3.5 bar differential per page 76.
Manual Section: Trouble shooting travel system p. 94Machine will not move at all, or drives in one direction only
Verify charge pressure first; the parking brake will not release below 10 bar, and page 97 covers that check. If pressure is good, work through the travel system tests for one-direction faults: swap the pump control solenoid connectors and see whether the fault changes sides. Replace the charge filter element if the differential switch has tripped at 2.5 bar.
Manual Section: Trouble shooting travel system p. 97Steering feels heavy and the dozer blade lifts slowly under a full push
Test the load-sensing circuit at the steering and working pump before condemning anything. Check the pre-tensioning valve setting of 7 to 9 bar covered on page 113; a valve stuck low starves both circuits. Then follow the load signal checks in the working hydraulics troubleshooting steps and clean the signal line fittings while they are open.
Manual Section: Trouble shooting working hydraulics p. 113Engine cranks but will not start, or stalls when the machine loads up
Confirm fuel supply and the Centry electronic speed control connections before pulling injectors; a lost speed signal stalls the engine the moment it loads. Work through the diesel engine section starting at page 19. On BC 771 RS engines set valve clearance to 0.36 mm inlet and 0.69 mm outlet, torquing the counter nuts to 61 Nm per page 44.
Manual Section: Diesel Engine p. 19Frequently Asked Questions
How do I reset the fault codes on the Bomag BC 771 RS?
Faults that have been rectified will no longer be displayed, but they can be read out using a special Cummins fault reader. If several faults are present, they can be called up individually by pressing the 'Fault diagnose' push button for approximately 5 seconds after the previous fault code is displayed. p. 31
What are the torque specifications for the scraper fastening?
The fastening of the scrapers must be checked at the specified maintenance intervals, and the required torque is 628 Nm. p. 12
How do I clear a fault in the central lubrication system?
To acknowledge a fault, press the push button for less than 1 second, which changes the flashing light to a permanent light. After rectifying the cause of the fault, switch the pump on again by pressing the button for longer than 2 seconds to release an additional lubrication cycle. p. 159
What are the valve clearance specifications for the Cummins engine?
The valve clearance for the Cummins engine is 0.36 mm for the inlet valves and 0.69 mm for the exhaust valves. These adjustments should only be performed when the engine is cold and at a stabilized coolant temperature of maximum 60 °C. p. 17
What is the filling capacity for the hydraulic oil system?
The hydraulic oil system has a total filling capacity of 350 liters, using HVLP 46 VI 150 oil. p. 18
Is this Bomag BC 771 RS manual a PDF I download?
You download the Service Training yourself: 250 pages, searchable PDF, available immediately. Keep a copy on every device you use.
Can I print just the pages I need from this Bomag BC 771 RS manual?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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