The S70 is the small skid-steer you squeeze into backyards, sidewalks, barns, and tight demo work. Around my shop, this manual is what we grab when an S70 is down and we need real specs and step-by-step teardown info, not safety stickers. If you're chasing a hydraulic issue, doing a drive chain job, or planning engine work on an S70 in this serial range, this is the book you want open on the bench.
What this manual helps you do
- Diagnose hydraulic problems, check pressures, and trace leaks on the S70's hydrostatic and loader circuits
- Follow step sequences to remove, rebuild, and reinstall components like drive motors, cylinders, and Bob-Tach parts
- Troubleshoot electrical faults using wiring diagrams, connector callouts, and logical test steps with a meter
- Adjust linkages, chain tension, controls, and safety interlocks so the loader runs within spec after repairs
- Replace major assemblies, then verify settings and system performance before you send the machine back to work
Who this is for
This is for small contractors, rental fleet shops, field techs, and owner-operators who actually wrench on an S70 and need repair procedures and specs. If you only want basic operating tips or daily checks, you want the operator's handbook instead, not this service manual.
FAQ
Q: Is this a searchable PDF and are the wiring diagrams readable?
A: Yes, it's a PDF you can search by keyword, and the wiring diagrams are clear enough to zoom in and read pin labels on a laptop or tablet.
Q: Does this cover my S70 serial number?
A: It covers S70 loaders in the B38V11001 through B38V99999 serial range. If your plate is outside that, this isn't the right manual.
Q: Is this the right document if I'm rebuilding or diagnosing, not just maintaining?
A: Yes, this is the workshop service manual, meant for teardown, diagnostics, and repair, not just routine maintenance schedules.
Bottom line: If you own or maintain a Bobcat S70 in that serial range and you're doing real repairs, this is the right manual. If you only need how-to-operate info, skip it.
📘 Show Index
Table of Contents:
- MAINTENANCE SAFETY
- CONTENTS
- FOREWORD
- FOREWORD
- SAFETY INSTRUCTIONS
- FIRE PREVENTION
- Maintenance
- Operation
- Electrical
- Hydraulic System
- Fueling
- Starting
- Spark Arrester Exhaust System
- Welding And Grinding
- Fire Extinguishers
- SERIAL NUMBER LOCATIONS
- Loader Serial Number
- Engine Serial Number
- LOADER IDENTIFICATION
- SAFETY AND MAINTENANCE
- LIFTING AND BLOCKING THE LOADER
- LIFT ARM SUPPORT DEVICE
- OPERATOR CAB
- Description
- Raising
- Lowering
- Special Applications Kit
- Special Applications Kit Inspection And Maintenance
- TRANSPORTING THE LOADER ON A TRAILER
- Loading And Unloading
- Fastening
- TOWING THE LOADER
- REMOTE START TOOL KIT – MEL1563
- Remote Start Tool – MEL1563
- Service Tool Harness Communicator – MEL1566
- Remote Start Procedure
- REMOTE START TOOL (SERVICE TOOL) KIT – 7217666
- Description
- Remote Start Tool (Service Tool) – 7022042
- Loader Service Tool Harness – 6689747
- Computer Service Tool Harness – 6689746
- Remote Start Procedure
- SERVICE SCHEDULE
- AIR CLEANER SERVICE
- Replacing Filter Elements
- ENGINE COOLING SYSTEM
- Cleaning
- Checking Level
- Removing And Replacing Coolant
- FUEL SYSTEM
- Fuel Specifications
- Biodiesel Blend Fuel
- Filling The Fuel Tank
- Fuel Filter
- Removing Air From The Fuel System
- ENGINE LUBRICATION SYSTEM
- Checking And Adding Engine Oil
- Engine Oil Chart
- Removing And Replacing Oil And Filter
- HYDRAULIC / HYDROSTATIC SYSTEM
- Checking And Adding Fluid
- Hydraulic / Hydrostatic Fluid Chart
- Removing And Replacing Hydraulic Fluid
- Removing And Replacing Hydraulic / Hydrostatic Filter
- Breather Cap
- FINAL DRIVE TRANSMISSION (CHAINCASE)
- Checking And Adding Oil
- Removing And Replacing Oil
- AUXILIARY CONTROL LOCKBOLT
- BOB-TACH
- Inspection And Maintenance
- LUBRICATING THE LOADER
- TIRE MAINTENANCE
- Wheel Nuts
- Rotating
- Mounting
- SPARK ARRESTER MUFFLER
- PIVOT PINS
- Inspection And Maintenance
- SEAT BAR RESTRAINT SYSTEM
- Description
- Inspecting
- Maintaining
- LOADER STORAGE AND RETURN TO SERVICE
- Storage
- Return To Service
- STOPPING THE ENGINE AND LEAVING THE LOADER
- EMERGENCY EXIT
- SEAT BELT
- Inspection And Maintenance
- HYDRAULIC SYSTEM
- HYDRAULIC/HYDROSTATIC SCHEMATIC
- HYDRAULIC SYSTEM INFORMATION
- Glossary Of Hydraulic / Hydrostatic Symbols
- Troubleshooting Chart
- CYLINDER (LIFT)
- Testing
- Removal And Installation
- Parts Identification
- Disassembly And Assembly
- CYLINDER (TILT)
- Testing
- Removal And Installation
- Parts Identification
- Disassembly And Assembly
- MAIN RELIEF VALVE
- Description
- Testing Without Auxiliaries
- Testing With Auxiliaries
- Removal And Installation
- HYDRAULIC CONTROL VALVE
- Description
- BICS™ Valve Removal And Installation
- BICS™ Valve, Lift Arm Bypass Orifice Removal And Installation
- Pressure Differential Valve Removal And Installation
- BICS™ Valve, Check Valve Removal And Installation
- BICS™ Valve, Solenoid Removal And Installation
- BICS™ Valve, Solenoid Testing
- BICS™ Valve, Identification Chart
- Removal And Installation
- Identification Chart
- Disassembly And Assembly
- Load Check Valves Removal And Installation
- Main Relief Valve Removal And Installation
- Port Relief / Anti-Cavitation Valve Removal And Installation
- Anti-Cavitation / Check Valves Removal And Installation
- Rubber Boot Removal And Installation
- Lift And Tilt Lock Block Removal And Installation
- Lift Spool And Detent Removal And Installation
- Lift Spool And Detent Disassembly
- Lift Spool And Detent Assembly
- Tilt Spool Removal And Installation
- Tilt Spool Disassembly And Assembly
- Auxiliary Spool Removal And Installation
- Auxiliary Spool Disassembly And Assembly
- Spool Seal Installation
- Auxiliary Pivot Bracket Removal And Installation
- Auxiliary Pivot Bracket Disassembly And Assembly
- LIFT ARM BYPASS CONTROL VALVE
- Description
- Testing
- Removal And Installation
- Disassembly And Assembly
- HYDRAULIC PUMP
- Description
- Direct Pump Testing
- Removal And Installation
- Hydraulic Pump Startup
- Parts Identification
- Disassembly And Assembly
- HYDRAULIC / HYDROSTATIC FILTER
- Description
- Housing Removal And Installation
- Housing Disassembly And Assembly
- HYDRAULIC FLUID RESERVOIR
- Description
- Removal And Installation
- OIL COOLER
- Description
- Removal And Installation
- BUCKET POSITION VALVE
- Description
- Solenoid Removal And Installation
- Solenoid Testing
- Removal And Installation
- Disassembly And Assembly
- AUXILIARY HYDRAULIC INTERLOCK VALVE
- Description
- Removal And Installation
- Disassembly And Assembly
- HYDROSTATIC SYSTEM
- HYDROSTATIC SYSTEM INFORMATION
- Description
- Troubleshooting
- HYDROSTATIC DRIVE MOTOR
- Description
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- CHARGE PRESSURE
- Description
- Testing
- Sender Removal And Installation
- HYDROSTATIC PUMP
- Description
- Replenishing / High Pressure Relief Valve Removal And Installation
- Removal And Installation
- Parts Identification
- Disassembly
- Assembly
- DRIVE BELT
- Description
- Adjusting
- Belt Removal And Installation
- Tensioner Pulley Removal And Installation
- Tensioner Pulley Disassembly And Assembly
- DRIVE SYSTEM
- BRAKE
- Description
- Disc Removal And Installation
- DRIVE COMPONENTS
- Description
- Axle Seal Removal And Installation
- Axle, Sprocket And Bearings Removal And Installation
- Chain Removal And Installation
- CHAINCASE
- Description
- Chaincase Cover Removal And Installation
- Chaincase Cover Disassembly And Assembly
- MAINFRAME
- SEAT BAR
- Description
- Removal And Installation
- Disassembly And Assembly
- Compression Spring Disassembly And Assembly
- OPERATOR CAB
- Gas Cylinder Removal And Installation
- Removal And Installation
- OPERATOR SEAT
- Removal And Installation
- Seat Belt Removal And Installation
- BOB-TACH
- Description
- Removal And Installation
- Lever And Wedge Disassembly And Assembly
- LIFT ARMS
- REAR DOOR
- FUEL TANK
- CONTROL PEDALS AND LINKAGES
- Description
- Pedal Removal And Installation
- Pedal Interlock Linkage Removal And Installation
- CONTROL PANEL
- Description
- Control Shield And Steering Lever Panels Removal And Installation
- CONTROL LEVER
- Description
- Lever Removal And Installation
- Lever Disassembly And Assembly
- Linkage Neutral Adjustment
- Pintle Arm Removal
- Pintle Arm Installation
- Pintle Arm Disassembly And Assembly
- WINDOW (REAR)
- WINDOW (TOP)
- ELECTRICAL SYSTEM AND ANALYSIS
- ELECTRICAL SCHEMATIC
- ELECTRICAL SYSTEM INFORMATION
- Glossary Of Electrical Symbols
- Cab Harness Connectors
- Mainframe Harness Connectors
- Description
- Troubleshooting
- Fuse And Relay Location / Identification
- Solenoid Testing
- BATTERY
- Removal And Installation
- Battery Maintenance
- Maintaining Battery Charge Level
- Battery Service During Machine Storage
- Battery Testing
- Battery Charging
- Using A Booster Battery (Jump Starting)
- Removing And Installing Battery
- ALTERNATOR
- Belt Adjustment
- Belt Replacement
- Charging System Inspection
- Alternator Voltage Testing
- Low Voltage Testing
- High Voltage Testing
- Removal And Installation
- Parts Identification
- STARTER
- Testing
- Removal And Installation
- Parts Identification
- INSTRUMENT PANELS
- Left And Right Panels
- Standard Key Panel
- Keyless Start Panel
- Option And Field Accessory Panel
- Left And Right Removal And Installation
- LIGHTS
- Front Removal And Installation
- Rear Removal And Installation
- Cab Light Removal And Installation (Earlier Models)
- Cab Light Removal And Installation (Later Models)
- BOBCAT INTERLOCK CONTROL SYSTEM (BICS™)
- Description
- Inspecting The BICS™ Controller (Engine STOPPED – Key ON)
- Inspecting The Seat Bar Sensor (Engine RUNNING)
- Inspecting The Traction Lock And Parking Brake (Engine RUNNING)
- Inspecting The Lift Arm Bypass Control
- Inspecting Deactivation Of The Auxiliary Hydraulics System
- BOBCAT CONTROLLER (GATEWAY)
- Description
- Troubleshooting
- Viewing Diagnostic Service Codes
- Removal And Installation
- SEAT BAR SENSOR
- Description
- Troubleshooting
- Testing
- Removal And Installation
- Bobcat Interlock Control System (BICS™) Circuit Test
- TRACTION LOCK
- Description
- Troubleshooting
- Removal And Installation
- BACK-UP ALARM SYSTEM (S/N A3W611001 – A3W613689 AND A3W711001 – A3W713379)
- Description
- Inspecting
- Adjusting Switch Position
- Troubleshooting
- Alarm Removal And Installation
- Switch Removal And Installation
- BACK-UP ALARM SYSTEM (S/N A3W613690 & ABOVE, A3W713380 & ABOVE, B38V11001 & ABOVE, B38W11001 & ABOVE)
- Description
- Inspecting
- Troubleshooting
- Switch Removal And Installation
- Alarm Removal And Installation
- BACK-UP ALARM SYSTEM (S/N B4TY11001 & ABOVE AND B4UC11001 & ABOVE)
- Description
- Inspecting
- Adjusting Switch Position
- Troubleshooting
- Alarm Removal And Installation
- Switch Removal And Installation
- ENGINE SERVICE
- ENGINE INFORMATION
- Description
- Specifications
- Torque Values
- Troubleshooting
- Engine Removal And Installation
- Engine Mount Replacement
- Compression – Checking
- ENGINE SPEED CONTROL
- MUFFLER
- AIR CLEANER
- Housing Removal And Installation
- ENGINE COOLING SYSTEM
- Radiator Removal And Installation
- Fan Removal And Installation
- Water Pump Removal And Installation
- Water Pump Disassembly And Assembly
- Thermostat Housing Removal And Installation
- LUBRICATION SYSTEM
- Oil Pan Removal And Installation
- Oil Pump Removal And Installation
- Oil Pump Inspection
- Engine Oil Pressure – Testing
- FUEL SYSTEM
- Fuel Camshaft Removal And Installation
- Governor Shaft Removal And Installation
- Governor Fork Lever Removal And Installation
- Fuel ShutOff Solenoid – Checking
- Fuel ShutOff Solenoid Removal And Installation
- Fuel Injection Pump Removal And Installation
- Fuel Injection Pump Timing
- Fuel Injector Nozzles Removal And Installation
- Fuel Injector Nozzle Pressure – Checking
- Nozzle Spray Condition
- Valve Seat Tightness
- CYLINDER HEAD
- Glow Plug – Checking
- Glow Plug Removal And Installation
- Valve Clearance Adjustment
- Valve Timing Checking
- Cylinder Head Removal And Installation
- Cylinder Head Disassembly And Assembly
- Cylinder Head – Servicing
- Cylinder Head Top Clearance
- Valve Guide – Checking
- Reconditioning The Valve And Valve Seat
- Valve Spring
- Valve Tappets
- Rocker Arm And Shaft – Checking
- CRANKSHAFT AND PISTONS
- Piston And Connecting Rod Removal And Installation
- Piston And Connecting Rod – Servicing
- Cylinder Bore – Checking
- Connecting Rod Alignment
- Crankshaft And Bearings Removal And Installation
- Crankshaft And Bearings – Servicing
- CAMSHAFT AND TIMING GEARS
- Timing Gearcase Cover Removal And Installation
- Timing Gears Backlash – Checking
- Idler Gear And Shaft Removal And Installation
- Camshaft – Servicing
- Idler Gear And Shaft Servicing
- FLYWHEEL AND HOUSING
- Flywheel Removal And Installation
- Ring Gear Removal And Installation
- Housing Removal And Installation
- HEATER
- HEATER SYSTEM
- REGULAR MAINTENANCE (S/N A3W611001 – A3W613399 AND A3W711001 – A3W713235)
- REGULAR MAINTENANCE (S/N A3W613400 & ABOVE, A3W713236 & ABOVE, B38V11001 & ABOVE, B38W11001 & ABOVE, B4TY11001 & ABOVE AND B4UC11001 & ABOVE)
- TROUBLESHOOTING
- Electric System
- Heater Valve Not Opening Or Closing
- Blower Motor Does Not Operate
- Blower Motor Operates Normally, But Air Flow Is Insufficient
- HEATER UNIT (S/N A3W611001 – A3W613399 AND A3W711001 – A3W713235)
- HEATER UNIT (S/N A3W613400 & ABOVE, A3W713236 & ABOVE, B38V11001 & ABOVE, B38W11001 & ABOVE, B4TY11001 & ABOVE AND B4UC11001 & ABOVE)
- HEATER COIL (S/N A3W611001 – A3W613399 AND A3W711001 – A3W713235)
- HEATER COIL (S/N A3W613400 & ABOVE, A3W713236 & ABOVE, B38V11001 & ABOVE, B38W11001 & ABOVE, B4TY11001 & ABOVE AND B4UC11001 & ABOVE)
- HEATER FAN (S/N A3W611001 – A3W613399 AND A3W711001 – A3W713235)
- HEATER FAN (S/N A3W613400 & ABOVE, A3W713236 & ABOVE, B38V11001 & ABOVE, B38W11001 & ABOVE, B4TY11001 & ABOVE AND B4UC11001 & ABOVE)
- HEATER VALVE (S/N A3W611001 – A3W613399 AND A3W711001 – A3W713235)
- HEATER VALVE (S/N A3W613400 & ABOVE, A3W713236 & ABOVE, B38V11001 & ABOVE, B38W11001 & ABOVE, B4TY11001 & ABOVE AND B4UC11001 & ABOVE)
- HEATER SWITCH (S/N A3W611001 – A3W613399 AND A3W711001 – A3W713235)
- Removal And Installation
- Checking
- HEATER SWITCH (S/N A3W613400 & ABOVE, A3W713236 & ABOVE, B38V11001 & ABOVE, B38W11001 & ABOVE, B4TY11001 & ABOVE AND B4UC11001 & ABOVE)
- Removal And Installation
- Checking
- SPECIFICATIONS
- (S70) LOADER SPECIFICATIONS
- Machine Dimensions
- Performance (A3W6, A3W7, B38V, B38W 11001 & Above)
- Performance (B4TY11001 & Above And B4UC11001 & Above)
- Engine
- Drive System
- Controls
- Hydraulic System
- Electrical
- Capacities
- Tires
- TECHNICAL SERVICE GUIDE SPECIFICATIONS
- Engine
- Engine Torques
- Cooling System
- Loader Torques
- Hydraulic / Hydrostatic System
- Fuel Consumption
- TORQUE SPECIFICATIONS FOR BOLTS
- Torque For General SAE Bolts
- Torque For General Metric Bolts
- HYDRAULIC CONNECTION SPECIFICATIONS
- O-ring Face Seal Connection
- Straight Thread O-ring Fitting
- Tubelines And Hoses
- Flare Fitting
- Port Seal Fitting
- HYDRAULIC / HYDROSTATIC FLUID SPECIFICATIONS
- CONVERSIONS
- Decimal And Millimeter Equivalent Chart
- U.S. To Metric Conversion Chart
- SERVICE TOOLS REQUIRED
- Remote Start Tools
- Hydraulic Tools
- Mainframe And Drive Tools
- Electrical Tools
- Engine Tools
- HVAC Tools
- ALPHABETICAL INDEX
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