Bobcat S550 Skid-Steer Loader Service Manual 6990677enUS – July 2019 PDF

Description

Bobcat S550 Skid-Steer Loader Service Manual 6990677enUS – July 2019 PDF

The Bobcat S550 Skid-Steer Loader Service Manual 6990677enUS – July 2019 PDF is a detailed service and repair reference for the S550 loader covering machines with serial numbers AHGM11001 & Above and B3GY11001 & Above. Prepared for the Bobcat loader mechanic, it provides servicing and adjustment procedures for the loader and its component parts and systems. Across 1310 pages, the manual brings together maintenance procedures, troubleshooting information, component removal and installation, disassembly and assembly instructions, service specifications, hydraulic and hydrostatic schematics, electrical diagnosis, engine service, HVAC work, and machine specifications.

This S550 service manual is particularly useful when work goes beyond routine operator maintenance. It follows the machine system by system, showing the technician where components are located, how assemblies are tested, how service tools are used, and where serial-number changes alter a procedure or component. The manual also makes clear that operating instructions, starting procedures, and daily operator checks are covered in the separate Operation & Maintenance Manual, while this document concentrates on shop-type service, adjustment, diagnosis, and repair.

File Details

• Manual type: Service Manual
• Brand / model: Bobcat S550 Skid-Steer Loader
• Document number: 6990677enUS
• Date: 07-19 (July 2019)
• Serial coverage: S/N AHGM11001 & Above; S/N B3GY11001 & Above
• Language: English
• Pages: 1310
• File format: PDF

Service Depth and Machine Coverage

The manual identifies the S550 with a Bobcat direct-injected D24NAP turbocharged and intercooled diesel engine. The engine service material covers specifications and mechanical service as well as fuel, cooling, lubrication, intake and related systems. The loader specifications section identifies the machine as using a 2.4 L Bobcat Engine Tier 4 configuration, while the service chapters provide the detailed procedures needed to inspect, test and repair the systems around it.

Hydraulic and hydrostatic coverage is a major part of this Bobcat S550 repair manual. The hydraulic section includes troubleshooting, lift and tilt cylinders, the Bob-Tach cylinder, relief valves, standard and ACS/SJC control valves, the lift arm bypass control valve, standard-flow and high-flow pumps, filters, reservoir, oil cooler, auxiliary circuits, Power Bob-Tach components and automatic ride control. The hydrostatic section addresses drive motors, two-speed versions, motor carriers, hydrostatic pumps, drive belt components, two-speed valve blocks and the drain manifold. Full schematic pages show the working, charge and drain circuits and distinguish manual and SJC configurations as well as option and serial-number variations.

Electrical work is supported by system information, fuse and relay identification, controller and instrument-panel coverage, service codes, charging and starting components, switches, sensors and electrical/hydraulic controls. The manual also includes diagnostic material that links service-code information to troubleshooting procedures. For mechanical repairs, the mainframe and drive chapters cover areas such as brakes, drive components, lift arms, Bob-Tach structures, panels, cab-related parts and other chassis assemblies, with removal and installation procedures distributed throughout the manual.

Chapters Covered

• Safety and Maintenance
  • Lifting and blocking the loader; lift arm support device; operator cab
  • Transporting and towing; remote start and service tool kits
  • Service schedule and maintenance intervals
  • Engine air cleaner, cooling, fuel and lubrication service
  • Hydraulic / hydrostatic fluid and filters; final drive chaincase
  • Bob-Tach inspection; lubrication; tires; pivot pins; storage and return to service
  • Stopping procedure, emergency exit and seat belt inspection
• Hydraulic System
  • Hydraulic / hydrostatic symbol glossary and troubleshooting
  • Lift, tilt and Bob-Tach cylinders: testing, removal, parts, disassembly and assembly
  • Main relief valve testing and adjustment
  • Standard hydraulic control valve and ACS / SJC hydraulic control valve
  • Lift arm bypass control valve
  • Standard-flow and high-flow hydraulic pump testing and service
  • Hydraulic / hydrostatic filters, reservoir and oil cooler
  • Bucket position valve, rear auxiliary diverter valve and front auxiliary coupler block
  • Power Bob-Tach blocks with serial-specific coverage; automatic ride control
• Hydrostatic System
  • System description and troubleshooting
  • Hydrostatic drive motors and two-speed drive motors
  • Motor carriers and two-speed motor carriers
  • Hydrostatic pumps, including SJC and serial-specific SJC pump coverage
  • Drive belt, two-speed valve block and drain manifold
• Drive System
  • Brake system and brake disc service
  • Drive components and final-drive related service procedures
• Mainframe
  • Loader structural and access components
  • Lift arms, Bob-Tach related structures, cab and panel service procedures
• Electrical System
  • Electrical system information and troubleshooting
  • Fuse and relay location / identification and solenoid testing
  • Instrument panels, lights, engine control unit and diagnostic service codes
  • Electrical / hydraulic controls, including ACS and SJC configurations
  • Starting, charging, switches, sensors, harnesses and control functions
• Engine Service
  • D24NAP engine information and service specifications
  • Cooling and lubrication systems
  • Fuel system, high-pressure fuel components, injectors and injector coding
  • Engine mechanical service and adjustment procedures
• Heating, Ventilation and Air Conditioning (HVAC)
  • Air-conditioning system flow and performance checks
  • Troubleshooting, refrigerant-system service and leak-related procedures
  • Compressor, condenser, evaporator, blower and heater-related service
• Specifications
  • S550 machine dimensions, performance and operating data
  • Engine, drive, hydraulic and electrical specifications
  • Fluid capacities, tires and technical service guide specifications
  • Loader torque data, hydraulic connection specifications and service tools
• Alphabetical Index

Taken as a whole, the Bobcat S550 Skid-Steer Loader Service Manual 6990677enUS – July 2019 PDF gives a mechanic a structured path from symptom and system identification through testing, adjustment, component access, removal, repair and reassembly. It combines illustrated procedures with service data rather than treating the loader as a collection of isolated parts. Serial-specific notes are important because the manual shows changes within the covered production range, including different hydraulic components and schematic arrangements for particular serial-number groups.

Diagnostics, Schematics and Service Specifications

For troubleshooting, the manual does more than provide component descriptions. Hydraulic charts address problems such as slow or uneven hydraulic action, lift-arm behavior and relief-pressure issues. Hydrostatic troubleshooting covers loss of drive, steering behavior, overheating and related causes. Electrical chapters connect fuse and relay layouts, service codes and component tests to the machine’s control systems. HVAC diagnosis includes system checks and troubleshooting for cooling performance and electrical operation.

The schematic material is especially valuable for pressure and flow diagnosis. Hydraulic / hydrostatic diagrams identify the reservoir, filters, relief and anti-cavitation valves, pumps, drive motors, BICS control functions, auxiliary circuits and option-dependent components. The diagrams include separate coverage for manual controls and SJC, and the manual distinguishes no-option and all-option arrangements where applicable. This makes the S550 skid-steer loader service manual useful when tracing a circuit before disconnecting lines or when comparing a machine’s serial number and equipment configuration with the correct schematic.

The specification chapters collect values that are needed during service rather than leaving them scattered through procedures. They include engine data, machine performance, hydraulic pump capacities and pressures, electrical-system information, fluid capacities, tire information and torque specifications. Individual repair procedures also state tightening torques, test conditions, clearances and limits where required. Using the stated values is important when a repair depends on correct adjustment rather than simple parts replacement.

Maintenance and Repair Procedures

Routine and periodic service information is integrated with deeper repair content. The service schedule lays out work at 10-hour, 50-hour, 100-hour, 250-hour / 12-month, 500-hour / 12-month, 1000-hour / 12-month and 1500-hour / 24-month intervals. Procedures cover items such as engine oil and filters, cooling system service, fuel filter work, hydraulic fluid and filters, chaincase fluid, lubrication points, tire inspection and wheel-nut torque. The manual then continues into component-level procedures for cylinders, pumps, valves, drive components, electrical parts, engine systems and HVAC assemblies.

Illustrations and photographs are used throughout to identify service locations, fasteners, connectors, hose routing, tools and component orientation. Parts-identification views support disassembly and assembly, while machine diagrams help locate major assemblies before work begins. Safety instructions are integrated into procedures involving raised lift arms, pressurized hydraulic or fuel systems, electrical work, hot cooling systems and other service hazards.

Get the S550 Service Information You Need

The Bobcat S550 Skid-Steer Loader Service Manual 6990677enUS – July 2019 PDF is suited to technicians and experienced owners carrying out diagnosis, adjustment, scheduled service and component repair on covered S550 loaders. It can support jobs ranging from fluid and filter service to hydraulic pressure testing, hydrostatic drive diagnosis, electrical fault tracing, engine fuel-system work, HVAC troubleshooting, cylinder service and major component removal and installation. Following the correct procedure, serial-number applicability, torque value, pressure specification or service limit helps reduce guesswork and makes it easier to return the machine to proper working condition after repair. Delivery is instant as a PDF after payment, with no shipping required. Open it on a compatible phone, tablet or computer, and print the pages you need for workshop use.