Bell B20D Mk III 6X4 & 6X6 Articulated Dump Truck Service Manual – 872155

Description

Bell B20D Mk III 6X4 & 6X6 Articulated Dump Truck Service Manual – 872155

This is the full workshop service manual for the Bell B20D Mk III 6X4 & 6X6 Articulated Dump Truck, released by Bell Equipment under Document Part Number 872155, Revision 0. It is written for the experienced technician and gives step-by-step diagnosis, testing, adjustment and repair procedures across every major system on the machine – engine, ZF transmission, hydraulic system, pneumatic system, electrical system, wet disc brakes, heating and air conditioning, and the complete scheduled maintenance program from daily checks up to 4 000 hours.

File Details

• Manual type: Service / Workshop Manual
• Brand: Bell Equipment
• Model: B20D Mk III 6X4 & 6X6 Articulated Dump Truck (ADT)
• Document part number: 872155
• Revision: 0
• Language: English
• Format: PDF
• Page count: ~528 pages

Chapters Covered

• Chapter 1 – Operational Check-Out Procedure
• Chapter 2 – Engine (theory, diagnose malfunctions, adjustments, tests, CAN Bus J1939)
• Chapter 3 – Electrical System (CCU, OEU, MDU2, wiring circuits, fault codes, sensor and switch tests, connector repair)
• Chapter 4 – Transmission ZF 6 HP 592 C PLUS (theory, power flows, retarder, diagnostics, pressure tests, error codes)
• Chapter 5 – Pneumatic System (theory, diagnostics, main pressure, park brake, seat, breathers)
• Chapter 6 – Hydraulic System (theory, diagnostics, residual and compensator valve tests, priority valve, accumulator charge, cycle time tests)
• Chapter 7 – Heating and Air Conditioning
• Chapter 8 – Maintenance Schedules (150 / 500 / 1 000 / 2 000 / 3 000 / 4 000 hours)
• Chapters 9-17 – Daily, 150 hr, 500 hr, 1 000 hr, 2 000 hr, 3 000 hr, 4 000 hr, As-Required and Miscellaneous Service and Checks
• Chapter 18 – Trouble Shooting (engine, transmission, axles, tyres, wet disc brakes, hydraulics, electrical, cab)
• Chapter 19 – Appendix (On Board Weighing, hydraulic fan cooler, headlight logic, wiper control, air-conditioning control, bin control, park brake function)

Across these chapters the manual gives a technician the complete reference set for the B20D Mk III: how each system is supposed to behave, what the factory pressures, torques and clearances are, how to recognise a fault from symptoms on the MDU or from machine behaviour, and exactly which test to run to confirm the cause before any part is removed. Sections are laid out in the standard step-by-step service format, with essential tools and service equipment listed at the head of the diagnostic and adjustment procedures so the job can be planned in advance.

Engine and Powertrain Coverage

The engine chapter covers the Mercedes-Benz 6-cylinder inline liquid-cooled unit with its Electronic Unit Injector (EUI) fuel system, including suction, pre-delivery and delivery stages of the injection cycle, cold-start operation, valve clearance adjustment, exhaust brake adjustment, cylinder compression testing, fuel pump pressure testing, low-pressure fuel circuit leak testing and oil pump pressure testing. The ZF 6 HP 592 C PLUS (Ecomat 2) transmission chapter follows the same pattern with torque converter theory, planetary power flows for every range including reverse, hydraulic system schematics, retarder operation, stall testing, transmission pressure testing, speed sensor and solenoid testing, and the full transmission control unit error code table.

Hydraulics, Pneumatics and Brakes

The hydraulic section describes the closed-centre, load-sensing system and covers the main hydraulic pump regulator, secondary steering pump, priority valve, brake accumulator charge valve, steering relief valve, bin control valve and the accumulator pressure reducing valve – each with its own test and adjustment procedure and the correct pressures to work to. The pneumatic chapter handles the air dryer and unloader valve, park brake circuit, inter-axle lock, horn and seat height circuits, with main pressure test and adjustment, park brake pressure test and park brake adjustment. Brake service information appears throughout the maintenance chapters, including park brake pad thickness checks, service brake pad wear limits and brake disc minimum thickness.

Electrical and Diagnostics

The electrical system chapter is one of the most detailed parts of the manual. It introduces the Chassis Control Unit (CCU), Output Extension Unit (OEU) and MDU2 monitor display unit with full pin layouts, describes the SAE J1939 CAN Bus and how to test it for opens, shorts and shorts to ground, provides the ignition and fuse layout, and lists engine fault codes, DM1 fault codes and transmission error codes. Sensor, solenoid, relay, diode, key switch, steering column switch and pneumatic pressure switch tests are all covered so a fault can be tracked down systematically rather than by part-swapping.

Maintenance Schedules and Troubleshooting

The scheduled maintenance chapters build up from daily or 10-hourly checks through 150, 500, 1 000, 2 000, 3 000 and 4 000 hour services, each detailing exactly what to inspect, clean, change or torque at that interval – engine oil and filters, fuel filters, coolant, transmission oil and filters, transfer case, axle and final drive oils, hydraulic reservoir filters and breathers, suction screens, drive line crosses and rollers, and cooling system cleaning. The troubleshooting chapter then maps symptoms to likely causes and remedies for the engine, transmission, axles, wheels, tyres, wet disc brakes, hydraulics, electrical system, cab and seat.

What This Manual Lets You Do

With the Bell B20D Mk III 6X4 & 6X6 Articulated Dump Truck Service Manual – 872155 on hand, a workshop or owner-operator can diagnose engine and transmission faults using the correct fault code tables, carry out hydraulic and pneumatic pressure tests to the factory figures, set brake accumulators and charge valves correctly, service the ZF transmission and retarder, trace electrical faults on the CAN Bus and MDU2, and run the full maintenance schedule to the hour. Working from the exact procedures and specifications for this machine is what keeps the B20D Mk III productive, prevents repeat failures, and avoids the guesswork that damages driveline and hydraulic components.

IMAGES PREVIEW

Delivery is instant – the manual is supplied as a PDF download, no shipping and no waiting. Once paid, you can open it on any laptop, tablet or phone, search the text, zoom into the wiring and hydraulic schematics, and print only the pages you need for the job in front of you. Whether you keep it on the workshop PC or the machine-side tablet, the Bell B20D Mk III 6X4 & 6X6 service manual stays available whenever the truck needs attention.