Bobcat 7753 Loader 6720899 (6–12) (Preview)
MAINTENANCE SAFETY
CONTENTS
– FOREWORD
– SAFETY INSTRUCTIONS
– 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 LOADER
— Procedure
– SINGLE POINT LIFT
– LIFT ARM SUPPORT DEVICE
— Installing Lift Arm Support Device
— Removing Lift Arm Support Device
– OPERATOR CAB
— Description
— Raising the Operator Cab
— Lowering the Operator Cab
— Emergency Exit
– SEAT BAR RESTRAINT SYSTEM
— Description
— Seat Bar Inspection
— Seat Bar Maintenance
– AIR CLEANER
— (Standard)
— (Optional)
— Replacing the Filter Element
– FUEL SYSTEM
— Fuel Specifications
— Filling the Fuel Tank
— Fuel Filter
— Removing Air from the Fuel System
– ENGINE LUBRICATION SYSTEM
— Checking Engine Oil
— Replacing of Oil and Filter
– COOLING SYSTEM
— Cleaning the Cooling System
— Checking the Coolant Level
— Removing Coolant from the Cooling System
– ALTERNATOR BELT
— Adjusting the Alternator Belt
– USING A BOOSTER BATTERY (JUMP STARTING)
— Procedure
– BATTERY
— Removal and Installation
– HYDRAULIC/HYDROSTATIC SYSTEM
— Checking and Adding Fluid
— Replacing the Hydraulic/Hydrostatic Filter
— Checking the Hydraulic Reservoir Breather Cap
— Replacing the Hydraulic Fluid
– SPARK ARRESTOR MUFFLER
— Cleaning Procedure
– TIRE MAINTENANCE
— Wheel Nuts
— Tire Rotation
— Tire Mounting
– FINAL DRIVE TRANSMISSION (CHAINCASE)
— Checking and Adding Oil
— Removing Oil from the Chaincase
– FAN GEARBOX
— Checking Grease Level
– DRIVE BELT
— Adjustment
— Drive Belt Replacement
— Adjusting the Drive Belt With The Spring Loaded Drive Idler
— Replacing The Drive Belt With The Spring Loaded Drive Idler
– LUBRICATION OF THE BOBCAT LOADER
— Procedure
– PIVOT PINS
– REMOTE START SWITCH
— Procedure
– DIAGNOSTIC TOOL
— Procedure
– SENDER AND SENSOR
— Service Checks
— Component
– MONITOR SERVICE CODES
– TROUBLESHOOTING THE BOSS® & LCD DISPLAY
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(S)
— Checking the Lift Cylinder(s)
— Removal and Installation
– TILT CYLINDER
— Checking the Tilt Cylinder
— Removal and Installation
— Rod End Seal
— Checking the Main Relief Valve
— Main Relief Valve Removal and Installation
— Removal and Installation
– HYDRAULIC PUMP
— Checking the Output of the Pump
— Removal and Installation (Early Models)
— Removal and Installation (Later Models)
– HYDRAULIC FILTER HOUSING
— Removal and Installation
– HYDRAULIC FLUID RESERVOIR
— Removal and Installation
– CONTROL PEDALS
— Removal and Installation
— Adjustment
– PEDAL INTERLOCK SHIELD AND LINKAGE
— Removal and Installation
— Adjustment
HYDROSTATIC SYSTEM
– TROUBLESHOOTING
– HYDROSTATIC SYSTEM INFORMATION
— Replenishing Valve Function
– FRONT PANEL
— Removal and Installation
– STEERING LEVERS
— Disassembly and Assembly
– STEERING LINKAGE (S/N 30758 & Below)
— Steering Linkage Adjustment
— Removal & Installation
— Centering Plate
— Pintle Arm Removal and Installation
— Pintle Arm Lobe Removal and Installation
– STEERING LINKAGE (S/N 30759 & Above)
— Removal and Installation
— Steering Linkage Adjustment
— Steering Neutral Adjustment
– HYDROSTATIC MOTOR
— Removal and Installation
– HYDROSTATIC PUMP
— Removal and Installation
– OIL COOLER
— Removal and Installation
– DRIVE BELT TENSIONER PULLEY
— Disassembly
— Assembly
— Checking Pulley End Play
– SPRING LOADED DRIVE BELT IDLER
— Removal And Installation
— Parts Identification
— Disassembly
— Assembly
DRIVE SYSTEM
– PARKING BRAKE
— Adjustment
— Removal and Installation
— Brake Block and Pads
— Brake Discs
– CENTER TRANSMISSION COVER
— Installation
– FRONT CHAINCASE COVER
— Removal and Installation
– MOTOR CARRIER (Later Models)
— Shaft Seal Replacement
— Early Models
— Removal and Installation
— Disassembly and Assembly
– AXLE HUB AND 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 GAS CYLINDER
— Removal and Installation
— Disassembly and Assembly
– OPERATOR CAB
— Removal and Installation
– REAR DOOR
— Removal and Installation
– REAR GRILL
— Removal and Installation
– SEAT BAR
— Removal
— Installation
– BOB–TACH
— Removal and Installation
— Bob–Tach Lever and Wedge
– LIFT ARM LINK
— Removal and Installation
– LIFT ARMS
— Removal and Installation
– FUEL TANK
— Removal and Installation
— Fuel Level Sender
ELECTRICAL SYSTEM
– ELECTRICAL SCHEMATICS
– ELECTRICAL SYSTEM INFORMATION
— Description
– TROUBLESHOOTING
– BATTERY
— 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 (Old Style)
— Disassembly (Old Style)
— Checking The Rotor (Old Style)
— Checking The Stator (Old Style)
— Checking The Rectifier (Old Style)
— Disassembly (New Style)
— Stator Continuity Test (New Style)
— Stator Ground Test (New Style)
— Disassembly (New Style)
— Rotor Ground Test (New Style)
— Rectifier Continuity (Diode) Test (New Style)
– STARTER
— Checking the Starter
— Removal and Installation
— Disassembly and Assembly
— Cleaning and Inspection
— Parts Identification
– OPERATING SYSTEM UNIT
— Removal and Installation
– INSTRUMENT PANEL
— Removal and Installation
ENGINE SERVICE
– TROUBLESHOOTING
– RADIATOR
— Removal and Installation
– ENGINE MUFFLER
— Removal and Installation
– BLOWER HOUSING/FAN GEARBOX
— Removal and Installation
– FAN GEAR BOX
— Disassembly
— Long Housing
— Short Housing
— Assembly
— Long Housing
— Short Housing
— Checking Backlash
— Parts Identification
– TENSION PULLEY
— Removal and Installation
– AIR CLEANER
— Removal And Installation
– ENGINE
— Removal and Installation
– FLYWHEEL
— Removal and Installation
— Flywheel Ring Gear
– BELT SHIELD
— Removal and Installation
– VALVE CLEARANCE
— Adjustment
– ENGINE COMPRESSION
— Checking
– GLOW PLUGS
— Removal and Installation
— Checking
– FUEL INJECTION PUMP
— Checking the Injection Pump
— Adjusting Shut–Off Linkage
— Removal and Installation
— Timing the Injection Pump
– FUEL INJECTION NOZZLES
— Removal and Installation
— Checking the Injector Nozzle
– CYLINDER HEAD
— Removal and Installation
— Disassembly and Assembly
— Servicing the Cylinder Head
— Top Clearance
– VALVE, VALVE SEAT AND GUIDE
— Checking the Valve Guide
— Reconditioning the Valve and Valve Seat
— Valve Spring
– ROCKER ARM AND SHAFT
— Checking
– TIMING GEARCASE COVER
— Removal and Installation
– IDLER GEAR AND CAMSHAFT
— Removal and Installation
— Servicing the Camshaft
— Servicing the Idler Gear and Shaft
– TIMING GEARS
— Checking Backlash
– FUEL CAMSHAFT
— Removal and Installation
— Governor
– CRANKSHAFT GEAR
— Removal and Installation
– OIL PUMP
— Removal and Installation
— Oil Pump Service
— Checking Engine Oil Pressure
— Relief Valve
– PISTON AND CONNECTING ROD
— Removal and Installation
— Servicing the Piston and Connecting Rod
— Connecting Rod Alignment
– CRANKSHAFT AND BEARINGS
— Removal and Installation
— Servicing the Crankshaft and Bearings
– CYLINDER BORE
— Checking the Cylinder Bore
– WATER PUMP
— Disassembly and Assembly
SPECIFICATIONS
– LOADER DIMENSIONS
– OPERATIONS & PERFORMANCE
– ENGINE
– HYDRAULIC SYSTEM
– ELECTRICAL
– DRIVE SYSTEM
– CAPACITIES
– TIRES
– ENGINE SPECIFICATIONS
— Fuel Injector Nozzles
— Fuel Injection Pump
— Cylinder Head
— Valves
— Valve Springs
— Valve Timing
— Rocker Arms
— Camshaft
— Tappet
— Cylinders
— Piston Rings
— Pistons
— Connecting Rod
— Oil Pump
— Crankshaft
— Timing Gear
— Thermostat
— Crankshaft Re–Grind Data
— Torque For General Metric Bolts
– TORQUE SPECIFICATIONS FOR LOADER
– HYDRAULIC/HYDROSTATIC FLUID SPECIFICATIONS
– STANDARD TORQUE SPECIFICATIONS FOR BOLTS
– DECIMAL AND MILLIMETER EQUIVALENTS
– U.S. TO METRIC CONVERSION
SERVICE MANUAL REVISIONS
– 7753–001
– 7753–002
– 7753–003
– 7753–004
– 7753–005
– 7753–006
– 7753–007
– 7753–008
– 7753–009
– 7753–010
– 7753–011
– 7753-012
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