2013 Volvo BM L70C Wheel Loader Service & Repair Manual

This 2013 Volvo BM L70C service manual brings together repair procedures, system descriptions, fault-tracing information, and workshop specifications. Shared sections identify L70B applications and distinguish the TD61GD basic engine from the TD63KDE low-emission version.

• Engine and fuel system: Engine removal and installation, injection-timing checks and adjustment, fuel-system bleeding, and idle-speed and stall-speed testing.

• Transmission and axles: HT90 pressure testing, transmission removal and installation, AWB15 axle descriptions, rear axle suspension checks, and front differential-lock adjustment.

• Brake repair: Disc replacement, brake-piston seal replacement, serial-specific wear checks, hydraulic function tests, braking-performance checks, and foot-brake valve reconditioning.

• Steering and frame: Orbitrol steering-valve and steering-cylinder reconditioning, CDC electrical checks, secondary-steering descriptions, and frame-joint bearing replacement.

• Working hydraulics: Pump, servo, and shock-pressure checks, control-lever and detent adjustments, Boom Suspension System testing, and accumulator reconditioning.

• Electrical and cab systems: Contronic ECU and display diagnostics, circuit-specific wiring diagrams, connector references, climate-control circuits, and R134a system descriptions.

The procedures are suited to technicians familiar with heavy-equipment service and equipped for pressure testing, electrical measurements, and lifting major assemblies.

Engine Service and Injection-System Differences

The engine sections explain the wet cylinder liners, separate cylinder heads, lubrication system, and turbocharger arrangement. The TD63KDE coverage describes its revised injection equipment and Twin Pump Intercooling system, supported by torque curves and a cooling-system principle diagram.

Injection-timing procedures cover dial-indicator measurement and the alternative timing tool 998 7057. Fuel bleeding distinguishes the two engine versions rather than treating their delivery-pipe connections as interchangeable.

The manual warns that bending or reshaping pressure-prestressed fuel delivery pipes can cause them to fracture.

HT90 Diagnosis and Driveline Work

Fault-tracing guidance relates poor pulling power to engine stall speed, torque-converter pressure, and transmission clutch pressures. This helps distinguish an engine-performance problem from a transmission fault before a major assembly is removed.

Transmission coverage includes removal, installation, pressure-check locations, a gear-shift diagram, and an HT90 hydraulic symbol diagram. The transmission-reconditioning entry in the Time Guide is a labor allowance, not a detailed internal overhaul procedure.

AWB15 sections describe planetary hub reductions and differential configurations. Rear axle suspension procedures cover clearance measurement, removal, and installation.

Brake Wear, Valve Repair, and Frame Service

Brake-wear checks distinguish earlier axles from those with built-in wear indicators. Replacement-disc instructions explain the wear-indicator retrofit and transfer of the pump rotor, helping identify the additional work involved when updating an earlier axle.

The brake section also covers accumulator checks, circuit-pressure adjustment, parking-brake adjustment, and foot-brake valve reconditioning. Its assembly cautions identify a pin-installation direction that can damage the valve seal.

Frame-joint work includes bearing replacement, shim selection, and bearing rolling-resistance checks.

Steering, Servo Controls, and Attachment Hydraulics

Steering coverage combines Orbitrol valve reconditioning with steering-cylinder seal and bearing work. CDC sections explain steering-lever signals and the differences between adjustable CU20 and fixed-ramp CU22 controls.

The hydraulic sections describe the central valve, closed-center servo system, and control-valve operation. Procedures address standby, working, servo, and shock pressures, plus bucket-positioner, boom kick-out, and floating-position controls.

Optional attachment coverage distinguishes GP hydraulics, HD hydraulics, and fifth/sixth functions. The fifth/sixth functions are intended for hydraulic cylinders; supplying hydraulic motors through them would interfere with brake charging. Further HD information is referenced to the separate Hydraulic Equipment service manual.

Contronic Circuits, Cab Systems, and Workshop Tools

Contronic material includes ECU indications, display menus, sensor-circuit faults, and input/output checks. Wiring examples cover key-turn engine stop, the starter circuit, preheating, CDC steering, and the Boom Suspension System.

Cab coverage explains climate-control operation, AC safety circuits, and R134a component differences. Refrigerant charging and emptying are referred to the separate Air Conditioning R134a service manual.

Dimensioned E-tool drawings include the E616 trolley, E1351 spanner, E1370 support, and E1752 lifting yoke. The Time Guide provides operation numbers and labor allowances.

Work around raised loader arms, pressurized systems, and heavy components requires the support and isolation precautions described in the manual. Safety material also addresses battery charging and heat-damaged fluor-rubber seals, including lime-water decontamination precautions.

Examples of Engine, Hydraulic, and Brake Specifications

Engine reference: The TD63KDE low-emission engine is listed with an 18.3:1 compression ratio, alongside separate specifications for the basic engine.

Hydraulic capacity: The capacity table gives 104 liters for the complete hydraulic system, distinguishing total system capacity from the hydraulic tank alone.

Brake testing: Front and rear brake-circuit pressure is specified at 8.0 ± 0.6 MPa at normal working temperature, with the system free of air.

Diagram Detail and PDF File Contents

Text access and diagram detail: PDF text search and embedded bookmarks are unavailable. Small electrical labels require zooming; some dense hydraulic-diagram labels remain pixelated and difficult to read when enlarged.

The download is one printable, 676-page PDF, including the service-information sheets, diagrams, and workshop tool drawings. The text is primarily English, with some Swedish labels and passages.