Bobcat 753 Loader 6720326 (6-12) (Preview)
MAINTENANCE SAFETY
CONTENTS
– FOREWORD
– SAFETY INSTRUCTIONS
– SERIAL NUMBER LOCATIONS
– LOADER SERIAL NUMBER
– ENGINE SERIAL NUMBER LOCATION
– DELIVERY REPORT
– BOBCAT LOADER IDENTIFICATION
PREVENTIVE MAINTENANCE
– SERVICE SCHEDULE
– LIFTING AND BLOCKING THE LOADER
— Procedure
– TRANSPORTING THE LOADER
— Procedure
– LIFTING THE LOADER
— Procedure
– LIFT ARM SUPPORT DEVICE
— To Disengage Lift Arm Support Device
— To Disengage Lift Arm Support Device
– OPERATOR CAB
— Description
— Raising The Operator Cab
— Lowering The Operator Cab
— Raising The Operator Cab (W/Hand Controls)
— Lowering The Operator Cab (W/Hand Controls)
– SEAT BAR SYSTEM
— Description
— Seat Bar Inspection
— Seat Bar Maintenance
– AIR CLEANER
— Replacement Of 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
— Replacement Of Oil And Filter
– ENGINE COOLING SYSTEM
— Cleaning The Cooling System
— Coolant Level
— Removing Coolant From The Cooling System
– ALTERNATOR BELT
— Adjusting The Alternator Belt
– USING A BOOSTER BATTERY (JUMP STARTING)
— Procedure
– HYDRAULIC/HYDROSTATIC SYSTEM
— Checking And Adding Fluid
— Hydraulic/Hydrostatic Filter Replacement
— Hydraulic Reservoir Breather Cap
– SPARK ARRESTOR MUFFLER
— Cleaning Procedure
– TIRE MAINTENANCE
— Wheel Nuts
— Tire Rotation
— Tire Mounting
– FINAL DRIVE TRANSMISSION (CHAINCASE)
— Checking And Adding Oil
– FAN GEARBOX
— Checking Grease Level
– DRIVE BELT
— Adjustment
— Drive Belt Replacement
– LUBRICATION OF THE LOADER
— Procedure
– 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
– HYDRAULIC CONTROL VALVE
— Checking The Main Relief Valve
— Main Relief Valve Removal And Installation
– HYDRAULIC CONTROL VALVE (753H)
— Checking The Dual Pressure Main Relief Valve (Low Setting)
— Checking The Dual Pressure Main Relief Valve (High Setting)
— Adjusting The Dual Pressure Main Relief Valve (Low Setting)
— Adjusting The Dual Pressure Main Relief Valve (High Setting)
– SELECT VALVE (753H)
— Checking The Main Relief Valve In High Horsepower Select Valve
– HYDRAULIC CONTROL VALVE
— Removal And Installation
– HYDRAULIC PUMP
— Checking The Output Of The Pump
— Checking The Output Of The High Flow Pump
— Removal And Installation
– HYDRAULIC FILTER HOUSING
— Removal And Installation
– HYDRAULIC FLUID RESERVOIR
— Removal And Installation
– CONTROL PEDALS
— Removal And Installation
— Adjustment
– PEDAL INTERLOCK LINKAGE
— Removal And Installation
— Adjustment
– DIVERTER VALVE (OPT.)
— Removal And Installation
– HAND CONTROLS
— Adjustment
— Removal And Installation
HYDROSTATIC SYSTEM
– TROUBLESHOOTING
– HYDROSTATIC SYSTEM INFORMATION
– Replenishing Valve Function
– FRONT PANEL
– Removal And Installation
– STEERING LEVERS
– Disassembly And Assembly
– STEERING LEVER CONTROL HANDLE
– Disassembly And Assembly
– STEERING LINKAGE
— 508611001–90879511011001 & Above 511350001 & Above 511475001–75023511525001 & Above 512711001–11125, 11131 & 11139
— Steering Linkage Adjustment
— Removal And Installation
— Centering Plate
— Pintle Arm Repair
— 512711126 – 11130, 11132 – 11138 & 11140 & Above 508690870 & Above 511475024 & Above
— Steering Linkage Adjustment
— Steering Neutral Adjustment
— Removal and Installation
– 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
DRIVE SYSTEM
– PARKING BRAKE
— Adjustment
— Removal And Installation
— Brake Block And Pads
— Brake Discs
– CENTER TRANSMISSION COVER
— Installation
– FRONT CHAINCASE COVER
— Removal And Installation
– REAR CHAINCASE COVER
— Removal And 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
— Checking Axle End Play
– 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
– SEAT BAR
— Removal
— Installation
– REAR GRILL
— Removal And Installation
– BOB–TACH
— Removal And Installation
— Bob–Tach Lever And Wedge
— Bob–Tach Stops (If Equipped)
– 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 And Inspection (New Style)
— Stator Continuity Test (New Style)
— Stator Ground Test (New Style)
— Rotor Continuity Test (New Style)
— Rotor Ground Test (New Style)
— Rectifier Continuity (Diode) Test (New Style)
— Assembly (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 (S/N 11079 & Above)
— Removal And Installation
ENGINE SERVICE
– TROUBLESHOOTING
– RADIATOR
— Removal And Installation
– ENGINE MUFFLER
— Removal And Installation
– BLOWER HOUSING/FAN GEARBOX
— Removal And Installation
— Tension Pulley Removal And Installation
– FAN GEARBOX
— Disassembly
— Long Housing
— Short Housing
— Assembly
— Long Housing
— Short Housing
— Checking Backlash
— Parts Identification
– AIR CLEANER
— Removal And Installation
– ENGINE
— Removal And Installation
— S/N 11079 & Above
— 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
– 753 LOADER SPECIFICATIONS
— LOADER DIMENSIONS
— OPERATIONS & PERFORMANCE
— ENGINE
— HYDRAULIC SYSTEM
— ELECTRICAL
— DRIVE SYSTEM
— CAPACITIES
— TIRES
– 753H LOADER SPECIFICATIONS
— LOADER DIMENSIONS
— OPERATIONS & PERFORMANCE
— ENGINE
— HYDRAULIC SYSTEM
— ELECTRICAL
— DRIVE SYSTEM
— CAPACITIES
— TIRES
– ENGINE SPECIFICATIONS
— Fuel Injection Nozzles
— Fuel Injection Pump
— Cylinder Head
— Valves
— Valve Springs
— Valve Timing
— Rocker Arms
— Camshaft
— Tappet
— Cylinders
— Piston Rings
— Piston
— 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
– 750-001
– 750-002
– 750-003
– 750-004
– 750-005
– 750-006
– 750-007
– 750-008
– 750-009
– 750-010
– 750-011
– 750-012
– 750-013
– 750-014
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