Bobcat 843, 843B Skid-Steer Loader Repair Service Manual - 6566091

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This workshop repair service manual PDF download for the 843 & 843B Bobcat Skid-Steer Loader has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to fully at every opportunity. 


APPLICABLE MODELS :

Bobcat Loader 843 
Bobcat Loader 843B
 

TABLE OF CONTENTS :

FOREWORD
SAFETY INSTRUCTIONS 
SERIAL NUMBER LOCATIONS 
DELIVERY REPORT 
BOBCAT LOADER IDENTIFICATION 
PREVENTIVE MAINTENANCE 
HYDRAULIC SYSTEM 
HYDROSTATIC SYSTEM 
DRIVE SYSTEM 
MAIN FRAME 
ELECTRICAL SYSTEM 
ENGINE SERVICE 
SPECIFICATIONS 
SERVICE MANUAL REVISIONS


MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
P/N : 6566091 (12-85)
Total Pages : 545


This 843 Bobcat Loader Manual PDF Download contains specs, diagrams, actual real photo illustrations, and schemes. In addition to space savings, nice thing about having completly searcheble PDF files instead of a hard-printed manual is that you can use the Search feature in your PDF reader software (Adobe Acrobat) to find just what your looking for and just print out the exact pages you need or all manual easily. This is the same manual your local dealer will use when doing a repair. This is a must for the Do-It-Yourselfer! Saving Yourself $$$$$$ In Service Repair And Maintenance Costs !!!! 

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MAINTENANCE SAFETY
CONTENTS
    FOREWORD
    SAFETY INSTRUCTIONS
    FIRE PREVENTION
    SERIAL NUMBER LOCATIONS
    LOADER SERIAL NUMBER
    ENGINE SERIAL NUMBER
    DELIVERY REPORT
    BOBCAT LOADER IDENTIFICATION
    
PREVENTIVE MAINTENANCE
    SERVICE SCHEDULE
    LIFTING AND BLOCKING THE LOADER
        Procedure
    TRANSPORTING THE BOBCAT LOADER
        Procedure
    LIFT ARM STOP
        Procedure
    OPERATOR CAB
        Seat Bar System
        Seat Bar Inspection
        Seat Bar Maintenance
        Raising The Operator Cab
        Lowering The Operator Cab
    USING AN EXTRA BATTERY (JUMP STARTING)
        Procedure
    REMOTE START SWITCH
        Procedure
        
HYDRAULIC SYSTEM
    HYDRAULIC / HYDROSTATIC SCHEMATICS
    TROUBLESHOOTING
    HYDRAULIC SYSTEM INFORMATION
        Flare Connections
        Straight Thread O-Ring Fitting
        Tubelines And Hoses
    LIFT CYLINDER
        Checking The Lift Cylinder(s)
        Removal And Installation
    TILT CYLINDERS
        Checking The Tilt Cylinder
        Removal And Installation
        Rod End Seal
    TILT CYLINDER (CESSNA)
        Disassembly
        Assembly
    HYDRAULIC CYLINDER REPAIR
        Disassembly
        Assembly
    HYDRAULIC CONTROL VALVE (CESSNA)
        Checking The Main Relief Valve
        Main Relief Valve Removal And Installation
        Removal And Installation
        Disassembly
        Inlet Section
        Tilt Section
        Lift Section
        Auxiliary Section
        Valve Spool Bolt
        Assembly
    HYDRAULIC CONTROL VALVE (MELROE)
        Checking The Main Relief Valve
        Main Relief Valve Removal And Installation
        Removal And Installation
        Disassembly And Assembly
        Detent Assembly
        Centering Mechanism
    HYDRAULIC PUMP (SINGLE STAGE)
        Checking The Output Of The Hydraulic Pump
        Removal And Installation
        Disassembly And Assembly
        Inspection
    HYDRAULIC PUMP (DOUBLE STAGE)
        Removal And Installation
        Disassembly And Assembly
        Inspection
    BUCKET POSITION VALVE (S/N 15001 & ABOVE)
        Removal And Installation
        Disassembly And Assembly
    PORT BLOCK (S/N 14999 & BELOW)
        40 Micron Filter (Bronze)
        Neutral By-Pass Valve
        Removal And Installation
    PORT BLOCK (S/N 15001 & ABOVE)
        Removal And Installation
        Charge By-Pass
        Cold Oil By-Pass
    HYDRAULIC FLUID FILTER HOUSING (S/N 15001 & ABOVE)
        Removal And Installation
        By-Pass Valve
    HYDRAULIC/HYDROSTATIC RESERVOIR (S/N 21514 & BELOW)
        Removal And Installation
    HYDRAULIC CONTROL PEDALS (S/N 14999 & BELOW)
        Removal And Installation
        Adjustment
    HYDRAULIC CONTROL PEDALS (S/N 15001 & ABOVE)
        Removal And Installation
        Adjustment
    PEDAL LOCK LINKAGE
        Adjustment
        
HYDROSTATIC SYSTEM
    TROUBLESHOOTING
    HYDROSTATIC SYSTEM INFORMATION
        High Pressure Relief/Replenishing Valves Function
    FRONT AND SIDE PANELS (S/N 19999 & BELOW)
        Removal And Installation
    STEERING LEVERS (S/N 16191 & BELOW)
        Removal And Installation
        Repairing The Steering Levers
        Steering Linkage Adjustment
        Removal And Installation
        RepairingThe Pintle Lever
    FRONT AND SIDE PANEL (ONE PIECE) (S/N 20001 & ABOVE) & 843B
        Removal And Installation
    STEERING LEVERS - 843-(S/N 16192 THRU 25999), 843-(STARTING WITH S/N 34222) & 843B
        Removal And Installation
        Repairing The Steering Levers
    STEERING LINKAGE 843-(S/N 16192 THRU 25999), 843-(STARTING WITH S/N 34222) & 843B
        Steering Linkage Adjustment
        Removal And Installation
        Repairing The Pintle Lever
    STEERING LINKAGE (S/N 26000 THRU 29869)
        Description
        Neutral Adjustment
        Steering Lever Centering Spring Mechanism
        Removal And Installation (Creep Mechanism)
    SERVO CONTROL
        Removal And Installation
        Disassembly And Assembly
    PINTLE LEVER ARMS (S/N 26000 - 29869)
        Removal And Installation
    STEERING LINKAGE (S/N 29870 - 31863)
        Description
        Neutral Adjustment
        Steering Lever Centering Spring Mechanism
        Creep Centering Spring Mechanism
        Pintle Arm
    STEERING LINKAGE (S/N 31864-34221)
        Hydrostatic Pump Centering Spring Adjustment
        Servo Control Unit Adjustment
        Steering Lever Centering Spring Adjustment
        Wheel RPM Adjustment (Left To Right)
    HYDROSTATIC MOTOR
        Removal And Installation
        Disassembly And Assembly
        Inspection
        Timing The Hydrostatic Motor
        High Pressure Hose Routing
    HYDROSTATIC PUMPS
        Checking The High Pressure Relief/Replenishing Valve
        Checking Charge Pressure
        Removal And Installation
        Disassembly And Assembly
        Rear Pump
        Front Pump
        Inspection
        Tow Valves
        Hydrostatic Pump Rear Mount (S/N 21574 & Above)
    HYDROSTATIC FLUID FILTER HOUSING
        Removal And Installation
        
DRIVE SYSTEM
    PARKING BRAKE
        Adjustment
        Removal And Installation
        Block And Pucks
    AXLES, SEALS AND BEARINGS
        Removal
        Installation
    FINAL DRIVE CHAIN
        Removal
        Installation
    REDUCTION GEARCASE
        Removal And Installation
        Checking Reduction Gearcase
        Disassembly And Assembly
        Installation
        Reduction Gearcase Seal
        
MAIN FRAME
    OPERATOR CAB (S/N 19999 & BELOW)
        Removal And Installation
    OPERATOR CAB (S/N 20001 & ABOVE)
        Removal And Installation
    OPERATOR CAB GAS CYLINDER
        Removal And Installation
    REAR DOOR
        Door Latch Adjustment
        Removal And Installation
    LIFT ARMS
        Removal And Installation
    BOB-TACH
        Removal And Installation
        Tilt Cylinder Rod End Seal
        Disassembly And Assembly
    FUEL TANK (S/N 19999 & BELOW)
        Removal And Installation
    FUEL TANK (S/N 20001 & ABOVE)
        Removal And Installation
        Fuel Tank Sender Switch
        
ELECTRICAL SYSTEM
    ELECTRICAL SCHEMATICS
    ELECTRICAL SYSTEM INFORMATION
        Description
    TROUBLESHOOTING
    BATTERY
        Checking The Battery
        Removal And Installation
    ALTERNATOR
        Alternator Belt Adjustment
        Checking The Alternator Wire Harness
        Checking Alternator Output
        Checking Alternator Regulator
        Removal And Installation
        Disassembly And Assembly
    MELROE ALTERNATOR
        Checking The Alternator Output
        Checking The Alternator Regulator
        Removal And Installation
        Disassembly And Assembly
    MANDO ALTERNATOR
    STARTER
        Checking The Starter
        Removal And Installation
        Disassembly And Assembly
        Cleaning And Inspection
        Replacing The Brushes
        
ENGINE SERVICE
    ENGINE SERVICE (PERKINS ENGINE)
        TROUBLESHOOTING
        VALVE CLEARANCE
            Adjustment
        ENGINE COMPRESSION
            Checking
        FUEL FILTER
            Removal And Installation
            Water Trap
        FUEL LIFT PUMP
            Checking
            Removal And Installation
        REMOVING AIR FROM FUEL SYSTEM
            Procedure
        FUEL INJECTION PUMP
            Removal And Installation
        ENGINE TIMING TO INJECTION PUMP (USING DIAL INDICATOR)
            Procedure
        EMGINE TIMING TO INJECTOR PUMP (USING TIMING TOOL)
            Procedure
        CHECKING TIMING MARK ON INJECTION PUMP FLANGE
            Procedure
        FUEL INJECTOR NOZZLES
            Removal And Installation
            Checking
        ENGINE
            Removal And Installation
        RADIATOR
            Removal And Installation
        OIL COOLER
            Removal And Installation
        ENGINE MUFFLER
            Removal And Installation
        ENGINE BLOWER HOUSING
            Removal And Installation
        ENGINE FLYWHEEL & U-JOINT
            Removal And Installation
            Flywheel Ring Gear
        CYLINDER HEAD
            Removing The Cylinder Head
            Cylinder Head Surface Alignment
            Installing The Cylinder Head
        VALVES
            Removal Of The Valves
            Installing The Valves
            Reconditioning The Valves And Valve Seats
            Installing Valve Guides
            Changing The Valve Springs
        COMBUSTION CHAMBER INSERTS
            Removal And Installation
        ROCKER ARMS
            Disassembly
            Assembly
        PISTON AND CONNECTING RODS
            Removal
            Disassembly
            Inspection
            Installation
        CYLINDER LINERS
            Checking
            Removal And Installation
        MAIN BEARINGS
            Removal
            Installation
            Crankshaft End Play
        CRANKSHAFT
            Removal
            Checking
            Installation
        REAR MAIN OIL SEAL
            Removal And Installation
        TIMING CASE COVER
            Removal And Installation
        IDLER GEAR AND HUB
            Removal
            Installation
        CAMSHAFT GEAR
            Removal
            Installation
        FUEL INJECTION PUMP DRIVE GEAR
            Removal And Installation
        CRANKSHAFT GEAR
            Removal
        TIMING CASE
            Removal And Installation
        CAMSHAFT AND TAPPETS
            Removal
            Inspection
            Installation
        LUBRICATION SYSTEM
            Description
        OIL PUMP
            Removal And Installation
            Disassembly And Assembly
            Checking
        WATER PUMP
            Removal And Installation
            Disassembly
            Checking
            Assembly
        THERMOSTAT
            Removal
            Testing The Thermostat
            Installation
    ENGINE SERVICE (PERKINS ENGINE - 200 SERIES)
        TROUBLESHOOTING
        VALVE CLEARANCE
            Adjustment
        ENGINE COMPRESSION
            Checking
        FUEL FILTER (S/N 13315 & BELOW)
            Removal And Installation
            Water Trap
        FUEL FILTER (S/M 13316 & ABOVE)
            Removal And Installation
        REMOVING AIR FROM THE FUEL SYSTEM (S/N 13315 & BELOW)
            Procedure
        REMOVING AIR FROM THE FUEL SYSTEM (S/N 13316 & ABOVE)
            Procedure
        FUEL INJECTION PUMP
            Removal And Installation
            Maximum Speed Setting
        TIMING THE FUEL INJECTION PUMP
            Procedure
        FUEL INJECTOR NOZZLES
            Removal And Installation
            Checking
        GLOW PLUGS
            Checking
        ENGINE
            Removal And Installation
        RADIATOR
            Removal And Installation
        OIL COOLER
            Removal And Installation
        ENGINE MUFFLER
            Removal And Installation
        ENGINE BLOWER HOUSING
            Removal And Installation
        ENGINE FLYWHEEL & U-JOINT
            Removal And Installation
            Flywheel Ring Gear
        CYLINDER HEAD
            Removing The Cylinder Head
            Cylinder Head Surface Alignment
            Installing The Cylinder Head
        VALVES
            Removing The Valves
            Installing The Valves
            Reconditioning The Valves And Valve Seats
            Installing The Valve Guides
            Checking The Valve Springs
        CONBUSTION CHAMBER INSERTS
            Removal And Installation
        ROCKER ARMS
            Disassembly
            Assembly
        PISTON AND CONNECTING RODS
            Removal
            Disassembly
            Inspection
            Installation
        CYLINDER LINERS
            Checking
            Removal And Installation
        MAIN BEARINGS
            Removal
            Installation
            Crankshaft End Play
        CRANKSHAFT
            Removal
            Installation
        REAR MAIN OIL SEAL
            Removal And Installation
        TIMING CASE COVER
            Removal And Installation
            Front Seal
        IDLER GEAR AND HUB
            Removal
            Installation
        CAMSHAFT GEAR
            Removal
            Installation
        FUEL INJECTION PUMP DRIVE GEAR
            Removal And Installation
        CRANKSHAFT GEAR
            Removal
        TIMING CASE
            Removal And Installation
        CAMSHAFT AND TAPPETS
            Removal
            Inspection
            Installation
        LUBRICATION SYSTEM
            Description
        OIL PUMP
            Removal And Installation
            Inspection
        OIL FILTER ADAPTER HOUSING
            Removal And Installation
        WATER PUMP
            Removal And Installation
            Disassembly
            Checking
            Assembly
        THERMOSTAT
            Removal
            Testing The Thermostat
            Installation
    ENGINE SERVICE (ISUZU ENGINE)
        TROUBLESHOOTING
        VALVE CLEARANCE
            Adjustment
        ENGINE COMPRESSION
            Checking
        FUEL FILTER
            Water Trap
            Fuel Filter Element
        REMOVING AIR FROM FUEL SYSTEM
            Procedure
        FUEL INJECTION PUMP
            Removal And Installation
        ENGINE TIMING TO INJECTION PUMP
            Procedure
        FUEL INJECTOR NOZZLES
            Removal And Installation
            Checking
        GLOW PLUGS
            Removal And Installation
        ENGINE OIL AND FILTER
            Removal And Installation
        ENGINE
            Removal And Installation
        RADIATOR
            Removal And Installation
        OIL COOLER
            Removal And Installation
        ENGINE MUFFLER
            Removal And Installation
        ENGINE FLYWHEEL & U-JOINT
            Removal And Installation
            Flywheel Ring Gear
        ENGINE BLOWER HOUSING
            Removal And Installation
        ENGINE MOUNTS
            Removal And Installation
        CYLINDER HEAD
            Removal And Installation
            Cylinder Head Surface Alignment
            Exhaust Manifold
        VALVES
            Removal And Installation
            Reconditioning The Valves And Valve Seats
            Valve Seat Insert
            Valve Guides
            Valve Springs
        ROCKER ARMS
            Disassembly And Assembly
            Push Rods
        PISTON AND CONNECTING ROD
            Removal
            Disassembly
            Inspection
            Assembly
            Installation
        CYLINDER LINERS
            Checking
            Removal
            Installation
        MAIN BEARINGS
            Removal
            Installation
            Crankshaft End Play
        CRANKSHAFT
            Removal
            Checking Tuffriding (Soft Nitriding) Coating
            Checking
            Crankshaft Gear
            Removal And Installation
            Installation
        TIMING CASE COVER SEAL
            Removal And Installation
        TIMING CASE COVER
            Removal And Installation
        IDLER GEAR AND HUB
            Removal And Installation
            Checking
        FUEL INJECTION PUMP IDLER GEAR
            Removal And Installation
            Bearing Installation
        CAMSHAFT GEAR
            Removal And Installation
        TIMING CASE
            Removal And Installation
        CAMSHAFT
            Removal And Installation
            Checking
            Camshaft Bearing
            Tappets
            Installation
        OIL PAN
            Removal
            Installation
        OIL PUMP
            Removal And Installation
            Checking
            Gear Replacement
            Rotor Replacement
            Oil Pump Relief Valve
        WATER PUMP
            Removal And Installation
            Disassembly
            Assembly
        THERMOSTAT
            Removal And Installation
            Inspection
        WATER JACKET TUBE
            Removal And Installation
            
TECHNICAL DATA
    GENERAL SPECIFICATIONS
        TORQUE SPECIFICATIONS
            Seat Bar, Fuel Tank & Panel Group
            Steering Levers, Linkage & Pedal Group
            Brakem Axle & Chaincase Group
            Operator Guard, Lift Arm & Main Frame Group
            Hydraulic/Hydrostatic Group
            Engine Group (Perkins)
            Engine Group (200 Series Perkins)
            Engine Group (Isuzu)
        HYDRAULIC/HYDROSTATIC FLUID SPECIFICATIONS
        DECIMAL AND MILLIMETER EQUIVALENTS
        U.S. TO METRIC CONVERSION
        STANDARD TORQUE SPECIFICATIONS FOR BOLTS
    TECHNICAL DATA (PERKINS ENGINE)
        LOADER SPECIFICATIONS
            Specifications
            Engine
            Loader Hydraulics
            Electrical
            Drive System
            Capacities
            Tires
        ENGINE SPECIFICATIONS
            Cylinder Head Dimensions
            Piston And Connecting Rod Dimensions
            Cylinder Block And Liner Dimensions
            crankshaft And Main Bearings Dimensions
            Timing Case, Camshaft And Drive Dimensions
            Oil Pump Dimensions
            Cooling System and Wster Pump Dimensions
            Fuel System Specifications
            De-Rating For Altitude
            Engine Torque
            Grinding Specifications For Crankshaft
    TECHNICAL DATA (PERKINS ENGINE - 200 SERIES)
        LOADER SPECIFICATIONS
            Specifications
            Engine
            Loader Hydraulics
            Electrical
            Drive System
            Capacities
            Tires
        ENGINE SPECIFICATIONS
            Cylinder Head Dimensions
            Pistons And Connecting Rod Dimensions
            Cylinder Block And Liner Dimensions
            Crankshaft And Main Bearing Dimensions
            Timing Case, Camshaft And Drive Dimensions
            Oil Pump Dimensions
            Cooling System And Water Pump Dimensions
            Fuel System Specifications
            De-Rating For Altitude
            Engine Torques
            Grinding Specifications For Crankshaft
    TECHNICAL DATA (iSUZU ENGINE)
        LOADER SPECIFICATIONS
            Operation And Performance
            Engine
            Loader Hydraulics
            Electrical
            Drive System
            Capacities
            Tires
        ENGINE SPECIFICATIONS
            Cylinder Head
            Valve, Vale Guide And Seat Insert
            Valve Springs
            Rocker Arm
            Tappets
            Piston, Pin And Rings
            Connecting Rod & Bearing
            Cylinder Liners
            Camshaft
            Crankshaft
            Idler Gear
            Oil Pump
            Fuel System
            Engine Torque
            
SERVICE MANUAL REVISIONS
    843-1
    843-2
    843-3
    843-4
    843-5
    843-6
    843-7
    843-8
    843-9
    843-10
    843-11
    843-12
    843-13
    843-14
    843-15
    843-16
    
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