Volvo L90C and L120C Loader Service Manual

Volvo L90C and L120C Loader Service Manual

This professional service manual covers in-depth repair procedures, maintenance instructions, and diagnostics for the Volvo L90C and L120C Wheel Loaders. It includes complete details on engine, transmission, hydraulic systems, steering, braking, and HVAC functionality—designed for experienced technicians working on diesel-powered loaders equipped with TD63KBE and TD73KDE engines.

Model Covers:

Volvo L90C – Engine Type TD63KBE
Volvo L120C – Engine Type TD73KDE

File Format: PDF

Size: 10.11 MB

No. of pages: 319

Language: English

Delivery Method: Instant Download – Access your file immediately after purchase.

📑 Table of Contents Overview:

General & Safety Information

• Articulated frame steering, engine & transmission specs, drivetrain and braking system overview
• Operator safety, lifting/blocking procedures, cab access and emergency exit instructions
• Engine identification, serial number locations, and delivery reports

Engine & Fuel System

• TD63KBE (L90C) and TD73KDE (L120C) six-cylinder turbocharged diesel engines
• Direct injection, low-emission specifications, fuel tank access, filter service procedures
• Oil checks, lubrication, and fuel pre-filter and filter replacement instructions

Transmission & Powertrain

• Hydro-mechanical transmissions (HT131 – L90C, HT205 – L120C) with torque converter
• AWB30 and AWB31 axle specs, differential lock operations, gear clutch mechanisms
• Constant mesh gear configuration and hydraulically activated clutches

Brake System

• Wet disc service brakes, dual hydraulic circuits, accumulator charging systems
• Warning lamp/buzzer diagnostics, central warning alerts and optional display notifications
• Integrated service and parking brake designs (external/internal differences by model)

Hydraulic System & Cylinders

• Working hydraulics, vane pumps, load-holding and anti-cavitation valves
• TP linkage arm system with parallel lift and high breakout force
• Servo valves, control spools, floating position mechanisms, shock valves and cooling

Steering & Frame

• Load-sensing hydrostatic steering system with dual cylinders and articulated frame
• Front/rear frame construction details, suspension mounts, cab and counterweight integration
• Bearings, support points, engine/transmission mounting and joint assemblies

Air Conditioning & Cab Environment

• Cab filtration and ventilation layout, washable and replaceable filters
• Heater valve control, blower fan speeds, 14 air outlets with pressure control discharge
• Optional air conditioning setup, condenser and evaporator routing, airflow distribution

This detailed Volvo L90C and L120C Loader Service Manual is the ultimate workshop companion for diagnosing, repairing, and maintaining your articulated wheel loader.