Bobcat S250, S300 Turbo Skid-Steer Loader Service Manual (S/N 526011001+, 526111001+, 525811001+, 525911001+) – 6902711

Description

The Bobcat S250, S300 Turbo Skid-Steer Loader Service Manual (S/N 526011001+, 526111001+, 525811001+, 525911001+) – 6902711 is the definitive workshop reference designed for professional service mechanics, heavy equipment technicians, and owner-operators demanding factory-accurate repair procedures. Spanning 1,076 comprehensive pages, this official publication provides complete step-by-step disassembly, inspection, reconditioning, assembly, and testing instructions across all major systems of the Bobcat S250 Turbo and Bobcat S300 Turbo loader platforms, including standard flow and high-flow configurations.

File Details

• Document Type: Factory Service Manual
• Manufacturer: Bobcat Company
• Machine Models Covered: Bobcat S250 Turbo and Bobcat S300 Turbo Skid-Steer Loaders (Includes High Flow)
• Applicable Serial Numbers: S250 (S/N 526011001 & Above, S/N 526111001 & Above); S300 (S/N 525811001 & Above, S/N 525911001 & Above)
• Publication / Part Number: 6902711 (6-12) Revised June 2012
• Page Count: 1,076 pages
• Language: English
• Document Format: High-Resolution Digital PDF

Comprehensive Systems & Technical Coverage

Every mechanical, hydraulic, hydrostatic, and electrical circuit is covered with clear exploded views, precise torque values, and diagnostic flowcharts. Whether tackling basic shop maintenance or executing a ground-up rebuild, this Bobcat S250 S300 service manual equips technicians with the authoritative technical data directly published by the manufacturer.

Key areas covered include:

• Hydraulic Systems & Controls: Complete coverage for standard foot control, Advanced Control System (ACS) selectable hand/foot controls, and Selectable Joystick Control (SJC) systems. Details both 1-piece and 2-piece casting hydraulic control valves, main relief valve calibration (3250–3350 PSI), port relief valves (up to 4000 PSI), anti-cavitation valves, tilt and lift spool servicing, load check poppets, and bucket positioning valves.
• Hydrostatic Drive System: Complete diagnostic testing and teardown procedures for variable displacement bi-directional hydrostatic pumps, high-pressure relief and replenishing valves (5000–5220 PSI), fixed-capacity drive motors, two-speed motors and shifting valves, charge pressure verification (400–460 PSI), oil cooler plumbing, drive belt tensioning, and hydrostatic motor carrier overhauls.
• Cylinder Rebuilding & Pin Servicing: Dedicated teardown and rebuild procedures for lift cylinders, tilt cylinders, and power Bob-Tach cylinders. Includes specialized disassembly using spanner tooling, rod seal collapsing techniques, head gland packing, and critical piston retaining nut torques—including 600 ft-lbs (814 Nm) for lift cylinder nuts and specific rotational tightening procedures for tilt cylinders.
• Bobcat Interlock Control System (BICS) & Safety: Complete logic schematics, valve manifold overhaul, solenoid testing (5–8 ohms standard, 7–10 ohms bypass/relief), seat bar sensor calibration, lift arm bypass control servicing, and remote start diagnostic procedures utilizing the MEL1563 service tool kit.
• Final Drive & Mainframe: Axle tube bearing service, sprocket and drive chain inspection, chaincase oil drainage and filling, front chaincase cover removal, parking brake engagement, two-speed brake rebuilds, Bob-Tach mechanical linkage inspection, and ROPS/FOPS tilt cab lifting/lowering safety measures.
• Electrical System & Electronic Diagnostics: Complete harness routing, alternator and starter diagnostics, instrument cluster pinouts, electronic security system integration, controller programming, sensor calibrations, and alphabetical listings of machine service diagnostic trouble codes.
• Engine Service & Support Systems: Fuel system bleeding via hand priming bulb, air cleaner maintenance with restriction code monitoring, cooling system maintenance utilizing 47/53 propylene glycol mixture, fan drive gearbox lubrication, and full mechanical engine removal, reconditioning, and overhaul instructions.
• Heating, Ventilation & Air Conditioning (HVAC): Refrigerant recovery, evacuation, and charging protocols, compressor clutch checks, condenser and evaporator cleaning, heater core plumbing, thermostat switches, and air conditioning diagnostic symptom tables.

Chapters Covered

• Foreword & General Inspection: 25-point technician inspection checklist, machine identification, and delivery reporting protocols
• Safety Instructions: Maintenance safety procedures, fire prevention, spark arrestor muffler servicing, and lift arm support installation
• Safety & Maintenance (Section 10-01): Service schedule, air cleaner servicing, engine cooling, engine lubrication (14-quart capacity), chaincase maintenance, fuel bleeding, hydraulic fluid and case drain filter replacement, remote start tool operations, and wheel nut torquing (140–160 ft-lbs)
• Hydraulic System (Section 20-01): Hydraulic control valves (1-piece and 2-piece for standard, ACS, and SJC), main relief pressure checking (3250–3350 PSI), port reliefs, lift/tilt/Bob-Tach cylinders, gear pumps (including 30 GPM and 40 GPM high flow pumps), auxiliary diverter block, and fold-out schematic diagrams
• Hydrostatic System (Section 30-01): Hydrostatic pump and motor overhauls, charge pressure tests, two-speed drive motor operation, drive belt adjustment, and displacement control valves
• Drive System (Section 40-01): Final drive chaincase, axle seals, bearings, front chaincase covers, and spring-applied hydraulic-release brakes
• Main Frame (Section 50-01): Operator cab ROPS/FOPS latching, suspension seats, seat bar sensors, fuel tank extraction, lift arm linkage pivot pins, and manual/power Bob-Tach wedge mechanisms
• Electrical System & Analysis (Section 60-01): Electrical schematics, battery and starter testing, electronic instrumentation, BICS interlock system analysis, service codes, and Service PC diagnostic interfacing
• Engine Service (Section 70-01): Engine troubleshooting, cylinder head servicing, flywheel and housing alignment, engine speed controls, and mechanical reconditioning
• Heating, Ventilation, Air Conditioning (Section 80-01): A/C compressor, condenser, evaporator heater units, expansion valves, pressure relief switches, and system charging procedures
• Specifications (Section SPEC-01): Loader performance specifications for S250 and S300 models, fluid capacities, hydraulic fitting connection torques, and standard SAE bolt torque ratings

Together, these chapters provide heavy equipment mechanics, field technicians, and shop owners with an uncompromising, end-to-end technical reference. Rather than providing vague overviews, the manual delivers exhaustive diagnostic workflows, exact electrical pinouts, high-resolution full-system hydraulic schematics, and factory assembly tolerances directly from Bobcat engineering.

Professional Shop Utility & Instant Delivery

Working on heavy loaders without precise factory documentation risks costly component damage, downtime, and critical safety hazards. The Bobcat S250, S300 Turbo Skid-Steer Loader Service Manual (S/N 526011001+, 526111001+, 525811001+, 525911001+) – 6902711 guarantees you have the exact torque numbers, relief valve test pressures, hydraulic schematics, and diagnostic steps required to maintain your equipment to original factory standards. Delivered as an instant PDF download, this file requires no waiting for physical shipment and can be viewed immediately on any desktop computer, laptop, tablet, or smartphone. The entire document is fully printable, allowing you to print out specific electrical diagrams, hydraulic routings, or disassembly pages to take directly into the service bay.