Bobcat 742B, 743B Skid-Steer Loader Repair Service Manual – 6720772

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This workshop repair service manual PDF download for the 742B, 743B 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 742B
Bobcat Loader 743B

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 : 6720772 (7–92)
Total Pages : 294

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MAINTENANCE SAFETY
CONTENTS
FOREWORD
SAFETY INSTRUCTIONS
SERIAL NUMBER LOCATIONS
LOADER SERIAL NUMBER
ENGINE SERIAL NUMBER (743B)
ENGINE SERIAL NUMBER (742B)
DELIVERY REPORT
BOBCAT SKID STEER LOADER IDENTIFICATION

PREVENTIVE MAINTENANCE
SERVICE SCHEDULE
LIFTING AND BLOCKING THE LOADER
Procedure
PARKING THE BOBCAT LOADER
Procedure
TRANSPORTING THE BOBCAT LOADER
LIFT ARM SUPPORT DEVICE
To Engage Lift Arm Support Device
To Disengage Lift Arm Support Device
OPERATOR CAB
Raising The Operator Cab
Lowering The Operator Cab
SEAT BAR RESTRAINT SYSTEM
Description
Seat Bar Inspection
Seat Bar Maintenance
AIR CLEANER SERVICE (743B)
Replacement Of The Filter Element
AIR CLEANER SERVICE (742B)
Replacement Of The Filter Element
FUEL SYSTEM (743B)
Fuel Specifications
Filling The Fuel Tank
Fuel Filter
Removing Air From The Fuel System
FUEL SYSTEM (742B)
Fuel Specifications
Filling The Fuel Tank
Fuel Filter
ENGINE LUBRICATION SYSTEM (743B)
Checking Engine Oil
Replacing Oil And Filter
ENGINE LUBRICATION SYSTEM (742B)
Checking Engine Oil
Replacement Of Oil And Filter
ENGINE COOLING SYSTEM (743B)
Coolant Level
Cleaning The Cooling System
Removing Coolant From The Cooling System
ENGINE COOLING SYSTEM (742B)
Coolant Level
Cleaning The Cooling System
Removing Coolant From The Cooling System
ALTERNATOR BELT ADJUSTMENT (743B)
Adjusting The Alternator Belt
ALTERNATOR BELT ADJUSTMENT (742B)
Adjusting The Alternator Belt
GOVERNOR (742B)
Governor Belt Adjustment
Governor Adjustment
Governor Oil Level
USING A BOOSTER BATTERY (Jump Starting)
Procedure
HYDRAULIC/HYDROSTATIC SYSTEM
Checking And Adding Fluid
Hydraulic/Hydrostatic Filter Replacement
Removing The Hydraulic Fluid
SPARK ARRESTOR MUFFLER
Cleaning Procedure
TIRE MAINTENANCE
Wheel Nuts
Tire Rotation
Tire Mounting
FINAL DRIVE TRANSMISSION (CHAINCASE)
Checking And Adding Oil
LUBRICATING THE BOBCAT LOADER
Procedure
U–JOINT LUBRICATION
Procedure
REMOTE START SWITCH
Procedure

HYDRAULIC SYSTEM
HYDRAULIC / HYDROSTATIC SCHEMATICS
TROUBLESHOOTING
HYDRAULIC SYSTEM INFORMATION
Flare Connections
O–Ring Face Seal Connection
Straight Thread O–ring Fitting
Tubelines And Hoses
LIFT CYLINDER
Checking The Lift Cylinder(s)
Removal And Installation
TILT CYLINDER
Checking The Tilt Cylinder
Removal And Installation
HYDRAULIC CONTROL VALVE
Checking The Main Relief Valve W/Auxiliary Couplers (Opt.)
Checking The Main Relief Valve W/O Auxiliaries
Main Relief Valve Removal And Installation
Adjusting The Main Relief Valve
Removal And Installation
HYDRAULIC PUMP
Checking The Output Of The Hydraulic Pump
Removal And Installation
PORT BLOCK
Removal And Installation
Cold Weather By–Pass Valve
Case Drain Relief Valve
HYDRAULIC FLUID RESERVOIR
Removal And Installation
HYDRAULIC CONTROL PEDALS
Removal And Installation
Adjustment
PEDAL INTERLOCK LINKAGE
Installation
Adjustment
HYDRAULIC FLUID FILTER HOUSING
Removal And Installation

HYDROSTATIC SYSTEM
TROUBLESHOOTING
HYDROSTATIC SYSTEM INFORMATION
High Pressure Relief/Replenishing Valve Function
FRONT PANEL
Removal And Installation
STEERING LEVERS
Removal And Installation
Repairing The Steering Levers
STEERING LINKAGE
Steering Linkage Adjustment
Removal And Installation
Repairing The Pintle Lever
HYDROSTATIC MOTOR
Removal And Installation
HYDROSTATIC PUMP
Checking Charge Pressure
Charge Pressure Relief Valve
Checking High Pressure Relief Valves
Removal And Installation
Hydrostatic Pump Rear Mount
High Pressure Hose Routing
Tow Valves

DRIVE SYSTEM
PARKING BRAKE
Adjustment
Removal And Installation
Brake Block And Pads
Brake Disc Removal And Installation
Rear Transmission Cover Installation
MOTOR CARRIER
Shaft Seal Replacement
Removal And Installation (Later Models)
Disassembly And Assembly (Later Models)
Disassembly And Assembly (Early Models)
AXLE SEAL
Removal And Installation
AXLE, SPROCKET AND BEARINGS
Removal And Installation
DRIVE CHAIN
Removal And Installation
CHAINCASE FLUID
Replacing The Chaincase Fluid

MAIN FRAME
OPERATOR CAB
Removal And Installation
OPERATOR CAB GAS CYLINDER
Removal And Installation
REAR DOOR
Door Latch Adjustment
Removal And Installation
REAR GRILL
Removal And Installation
BOB–TACH
Removal And Installation
Bob–Tach Lever And Wedge
LIFT ARMS
Removal And Installation
FUEL TANK
Removal And Installation
Fuel Tank Sender Switch

ELECTRICAL SYSTEM
ELECTRICAL SCHEMATICS
ELECTRICAL SYSTEM INFORMATION
TROUBLESHOOTING
BATTERY
Checking The Battery
Removal And Installation
ALTERNATOR BELT SHIELD (743B)
Removal And Installation
ALTERNATOR
Checking The Alternator Output (Old Style)
Checking The Alternator Regulator (Old Style)
Alternator Output Test (New Style)
Rectifier (Diode) Test (New Style)
Alternator Regulator Test (New Style)
Removal And Installation (743B)
Removal And Installation (742B)
Disassembly And Assembly (Old Style)
Disassembly and Assembly (New Style)
Stator Continuity Test
Stator Ground Test
Rotor Continuity Test
Rotor Ground Test
Rectifier Continuity (Diode) Test
Rectifier Continuity (Diode) Test (New Style)
STARTER
Checking The Starter
Removal And Installation (743B)
Removal And Installation (742B)
Parts Identification
Disassembly And Assembly
Replacing The Brushes
Cleaning and Inspection

ENGINE SERVICE
ENGINE SERVICE (Kubota 743B)
TROUBLESHOOTING
FUEL FILTER
Replacing The Fuel Filter
Removing Air From The Fuel System
GLOW PLUGS
Checking
ENGINE COMPRESSION
Checking
FUEL INJECTION PUMP
Removal and Installation
Timing The Injection Pump
Checking The Injection Pump
FUEL INJECTOR NOZZLES
Removal And Installation
Checking the Nozzles
ENGINE
Removal And Installation
RADIATOR AND OIL COOLER
Removal And Installation
BLOWER HOUSING
Removal And Installation
ENGINE FLYWHEEL AND U–JOINT
Removal And Installation
Flywheel Ring Gear
MUFFLER
Removal And Installation
CYLINDER HEAD
Removal
Disassembly
Servicing
Valve Guide Installation
Assembly
Installation
ENGINE REPAIR
Gearcase Removal
Timing Gear, Camshaft And Oil Pump Removal
Pistons And Crankshaft Removal
Timing Gear And Camshaft Service
Servicing The Connecting Rods And Pistons
Crankshaft Service
Cylinder Liner Service
Lubrication System
Oil Pump Service
Water Pump Service
ENGINE ASSEMBLY
Crankshaft Installation
Installing The Pistons
Installing The Camshaft And Timing Gears
Gearcase Installation
ENGINE SERVICE (Mitsubishi 742B)
TROUBLESHOOTING
VALVE CLEARANCE
Adjustment
ENGINE COMPRESSION
Checking
IGNITION TIMING
Procedure
DISTRIBUTOR
Removal And Installation
Point Gap Adjustment
Disassembly And Assembly
Checking Centrifugal Advance
Checking Vacuum Advance
CARBURETOR
Description
Removal And Installation
Disassembly And Assembly
Adjustment
Governor Adjustment
FUEL PUMP
Removal And Installation
Inspection
Check The Fuel Pump
Fuel Filter
ENGINE BELT SHIELD
Removal And Installation
ENGINE
Removal And Installation
OIL COOLER AND BLOWER HOUSING
Removal And Installation
RADIATOR
Removal And Installation
ENGINE MUFFLER
Removal And Installation
ENGINE FLYWHEEL AND U–JOINT
Removal And Installation
Flywheel Ring Gear
ROCKER ARMS
Removal
Inspection
Installation
CAMSHAFT
Removal And Installation
Inspection
CYLINDER HEAD
Removal And Installation
Inspection
VALVES
Removal
Installation
Reconditioning The Valve And Valve Seat
Valve Seat Inserts
Valve Guide
Valve Spring
PISTON AND CONNECTING ROD
Removal
Disassembly
Inspection
Assembly
Installation
PISTON PIN
Assembly Of The Tool
Removal Of The Piston Pin
Installation Of The Piston Pin
CYLINDER LINERS
Checking
CRANKSHAFT AND MAIN BEARINGS
Description
Removal
Checking
Checking Oil Clearance (Plastic Gauge)
Installation
Crankshaft End Play
Rear Oil Seal
TIMING BELT
Adjustment
Removal
Inspection
Assembly
FRONT CASE AND OIL PAN
Removal And Installation
OIL PUMP
Removal
Inspection
Installation
Relief Valve
FRONT CASE SEAL
Removal And Installation
WATER PUMP
Removal And Installation
Inspection
THERMOSTAT
Removal And Installation
Inspection

SPECIFICATIONS
SPECIFICATIONS (743B)
SPECIFICATIONS
OPERATIONS & PERFORMANCE
ENGINE
HYDRAULIC SYSTEM
ELECTRICAL
DRIVE SYSTEM
CAPACITIES
TIRES
ENGINE SPECIFICATIONS
Fuel Injection Nozzles
Fuel Injection Pump
Cylinder Head
Valves
Valve Springs
Rocker Arms
Camshaft
Cylinders
Piston Rings
Pistons
Crankshaft
Oil Pump
Engine Oil
ENGINE BOLT TORQUES
SPECIFICATIONS (742B)
SPECIFICATIONS
LOADER DIMENSIONS
OPERATIONS & PERFORMANCE
ENGINE
HYDRAULIC SYSTEM
ELECTRICAL
DRIVE SYSTEM
CAPACITIES
TIRES
ENGINE SPECIFICATIONS
General
Cylinder Head
Cylinder Block
Piston
Piston Pin
Connecting Rod
Crankshaft
Flywheel
Camshaft
Valve Train
Valve Guide
Valve Spring
Rocker Arm And Shaft
Oil Pump
Fuel Pump
Carburetor
Water Pump
Thermostat
Starter
Alternator
Distributor
Spark Plugs
Engine Torque
TECHNICAL DATA
HYDRAULIC/HYDROSTATIC FLUID SPECIFICATIONS
DECIMAL AND MILLIMETER EQUIVALENTS
U.S. TO METRIC CONVERSION
TORQUE FOR GENERAL METRIC BOLTS
STANDARD TORQUE SPECIFICATIONS FOR BOLTS

SERVICE MANUAL REVISIONS
742B, 743B–001
742B, 743B–002
742B, 743B–003
742B, 743B–004

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