Bobcat X331 Excavator 6722918 (6-12) (Preview)
MAINTENANCE SAFETY
CONTENTS
– FOREWORD
– SAFETY INSTRUCTIONS
– SERIAL NUMBER LOCATIONS
– HYDRAULIC EXCAVATOR SERIAL NUMBER
– ENGINE SERIAL NUMBER
– DELIVERY REPORT
– HYDRAULIC EXCAVATOR IDENTIFICATION
– MACHINE SIGNS TRANSLATIONS (DECALS)
PREVENTIVE MAINTENANCE
– SERVICE SCHEDULE
– ENGINE COVER
— Procedure
– AIR CLEANER SERVICE
— Replacing the Filter Element
– FUEL SYSTEM
— Fuel System Service
— Fuel Filters
— Removing Air From the Fuel System
– ENGINE LUBRICATION SYSTEM
— Checking The Engine Oil
— Engine Oil and Filter Replacement
– COOLING SYSTEM
— Coolant Level
— Coolant Replacement
– HYDRAULIC SYSTEM
— Checking and Adding Fluid
— Replacement of the Hydraulic Filter
— Hydraulic Reservoir
— Diagnostic Couplers
– USING A BOOSTER BATTERY (JUMP STARTING)
— Procedure
– LUBRICATION OF THE HYDRAULIC EXCAVATOR
— Procedure
– FINAL DRIVE CASE
— Checking Oil Level
— Draining Final Drive Case
HYDRAULIC SECTION
– HYDRAULIC SCHEMATICS
– HYDRAULIC SERVICE INFORMATION
— Description
– MAIN RELIEF VALVES
— Checking the Dual Pressure Relief Valves at Diagnostic Couplers
— Check the Single Pressure Relief Valve (3 Spool Valve)
— 6 Spool Dual Pressure Relief Valve Adjustment Procedure
— High Pressure Adjustment Procedure (6 Spool Only)
— Low Pressure Adjustment Procedure (6 Spool Only)
— 3 Spool Single Pressure Relief Valve Adjustment Procedure
– HYDRAULIC PUMP
— Checking the Hydraulic Pump
— Removal and Installation
— Parts Identification
— Disassembly
— Assembly
– HYDRAULIC CONTROL VALVE (6 Spool)
— Removal and Installation
— Parts Identification
– CONTROL VALVE (6 Spool)
— Disassembly and Assembly
— Disassembly
— Assembly
— Right Hand Travel
—- Spool Wiper and Spool Seal Installation
— Boom, Bucket and Arm
—- Relief Valves
— Auxiliary
—- Spool Seal and Spool Wiper Installation
— Left Hand Travel
—- Relief Valve
—- Load Check Plug Assembly
—- Spool Seal and Spool Wiper Installation
— End Cover–Supply and Relief Valve
— End Cover
– HYDRAULIC CONTROL VALVE (3 Spool)
— Removal and Installation
— PARTS IDENTIFICATION
– CONTROL VALVE (3 Spool)
— Disassembly and Assembly
— Disassembly
— Assembly
— House Swing Section
— Blade and Boom Swing Section
— Spool Seal and Spool Wiper Installation
— End Cover–Supply
— End Cover
— Pressure Build–up Valve
— Adjustment Procedure
– PRESSURE REDUCING VALVE WITH ACCUMULATOR
— Removal and Installation
— Parts Identification
– ACCUMULATOR
— Disassembly
— Assembly
— Setting the Safety Relief Valve
— Charging
– AUXILIARY SELECTOR VALVE
— Removal and Installation
— Disassembly And Assembly
– TWO SPEED VALVE
— Removal and Installation
— Parts Identification
– PORT BLOCK
— Removal and Installation
– OIL COOLER
— Removal And Installation
– HYDRAULIC RESERVOIR AND FUEL RESERVOIR
– HYDRAULIC FILTER ASSEMBLY
— Removal And Installation
– BOOM CYLINDER
— Removal And Installation
— Parts Identification
– ARM CYLINDER
— Removal And Installation
— Parts Identification
– BUCKET CYLINDER
— Removal And Installation
— Parts Identification
– BLADE CYLINDER
— Removal And Installation
— Parts Identification
– BOOM SWING CYLINDER
— Removal And Installation
— Parts Identification
– HYDRAULIC CYLINDER
— Disassembly
— Assembly
– JOYSTICK CONTROL CHANGE
— To change from I.S.O. to STANDARD control patterndo the following
— To change STANDARD to I.S.O. control pattern dothe following
DRIVE SECTION
– LEFT CONSOLE
— Lockout Valve Removal and Installation
— Cylinder Removal and Installation
— Removal and Installation
– LEFT JOYSTICK
— Removal and Installation
— Parts Identification
— Disassembly and Assembly
– RIGHT CONSOLE
— Removal and Installation
– RIGHT CONSOLE COVER
— Removal and Installation
– SPEED CONTROL LEVER
— Low Idle Adjustment
— High Idle Adjustment
— Removal and Installation
– BLADE CONTROL LEVER
– STEERING LEVERS AND PEDALS
— Removal and Installation
UPPER WORKS AND SWING SECTION
– ENGINE COVER
— Removal and Installation
– SEAT AND SEAT MOUNT
— Removal and Installation
– FLOORMAT AND FLOOR PLATE
— Removal and Installation
– REAR FLOOR PLATE
— Removal and Installation
– SWING MOTOR COVER
— Removal and Installation
– INSPECTION COVER
— Removal and Installation
– TOOL BOX
— Removal and Installation
– LEFT HAND SIDE COVER
— Removal and Installation
– RIGHT HAND SIDE COVER
— Removal and Installation
– RIGHT HAND CORNER POST
— Removal and Installation
– LEFT HAND CORNER POST
— Removal and Installation
– COUNTERWEIGHTS
— Removal and Installation
– FRONT ENGINE COVER
— Removal and Installation
– BUCKET
— Removal and Installation
– BUCKET TEETH
— Removal and Installation
– ARM
— Removal and Installation
– BOOM
— Removal and Installation
– BOOM SWING BRACKET
— Removal and Installation
— Hose Installation
— Swing Bracket Bushing Replacement
— Bushing Removal
— Bushing Installation
— Boom Pivot Bushing Replacement
— Bushing Removal
— Bushing Installation
– SWING MOTOR
— Removal and Installation
— Disassembly
— Assembly
– CROSS PORT RELIEF VALVE
— Disassembly
— Assembly
— Description
— Testing
– SWING GEAR BOX ASSEMBLY
— Parts Identification
— Disassembly
— Assembly
– UPPERSTRUCTURE AND SWING CIRCLE GEAR
— Removal and Installation
— Removal and Installation
— Swing Bearing Removal
— Swing Bearing Installation
— Alignment Pins (Threaded)
— Alignment Pins (Not Threaded)
– CENTER SWIVEL JOINT
— Removal And Installation (Through Bottom Access Cover)
— Parts Identification
– ROPS CANOPY
— Removal And Installation
– CAB
— Removal And Installation
— Door Removal And Installation
— Front Window Removal And Installation
— Front Lower Glass Removal And Installation
— Front Upper Plexiglass Removal And Installation
— Door Glass Removal And Installation
— Left Hand Side Glass Removal And Installation
— Rear Glass Removal And Installation
— Right Hand Side Glass Removal and Installation
— Right Hand Window Assembly Removal AndInstallation
– CAB/CANOPY REAR COVER
— Removal And Installation
— Installation
MAIN FRAME AND TRACKS
– BLADE
— Removal and Installation
– TRACK TENSION
— Adjustment
— Rubber Tracks
— Steel Tracks
– TRACK
— Removal and Installation
— For Rubber Track:
— For Steel Track:
– TRACK FRAME
— Disassembly and Assembly
– TRACK IDLER
— Parts Identification
— Disassembly
— Assembly
– TRACK ROLLER
— Parts Identification
— Disassembly
— Assembly
– TRAVEL MOTOR
— Removal and Installation
— Parts Identification
– TRAVEL MOTOR
— Disassembly
— Assembly
– TRACK
— Damage Identification and Causes
— Cutting of the steel cords
— Abrasion of embedded metals
— Separation of embedded metals due to external forces
— Separation of embedded metals due to corrosion
— Cuts on the lug side rubber
— Cracks of the lug side rubber due to fatigue
— Lug abrasion
— Cracks and cuts on the lug side rubber at the edges of the embedded metals
— Abrasion of the track roller side rubber surface
— Cuts on the edges of track roller side rubber
ELECTRICAL SYSTEM
– ELECTRICAL SYSTEM
– TROUBLESHOOTING
– ELECTRICAL SYSTEM
— Description
— Fuses
— Fuse Arrangement
— Electrical System Service
– BATTERY
— Checking the Battery
— Removal and Installation
– ALTERNATOR
— Belt Adjustment
— Removal and Installation
– STARTER
— Removal and Installation
— Disassembly and Assembly
— Cleaning and Inspection
– FUEL LEVEL SENDER
— Removal and Installation
— Checking
– INSTRUMENT PANEL
— Removal and Installation
– CAB ELECTRICAL (Cab Option)
ENGINE SERVICE
– TROUBLESHOOTING
– VALVE CLEARANCE
— Adjustment
– ENGINE COMPRESSION
— Checking
– ELECTRIC FUEL PUMP
— Removal and Installation
— Removing Air From the Fuel System
– FUEL FILTER
— Removal and Installation
– FUEL SHUT–OFF SOLENOID
— Adjustment
– FUEL SHUT–OFF SOLENOID
— Removal and Installation
— Timer Module
— Removal and Installation
– FUEL INJECTION PUMP
— Checking the Injection Pump
— Removal and Installation
— Timing the Injection Pump
– FUEL INJECTOR NOZZLES
— Removal and Installation
— Checking the Injector Nozzle
– GLOW PLUGS
— Removal and Installation
— Checking the Glow Plug
– FAN GUARD
— Removal and Installation
– RADIATOR
— Removal and Installation (S/N 20001–20067)
— Removal and Installation
— Removal and Installation (S/N 20068 & Above)
– AIR CLEANER
— Removal and Installation
– MUFFLER
— Removal and Installation
– ENGINE
— Removal and Installation
– ENGINE FLYWHEEL
— Removal and Installation
— Flywheel Ring Gear
– CYLINDER HEAD
— Removal
— Disassembly
— Servicing the Cylinder Head
— Assembly
— Installation
– ENGINE REPAIR
— Removing the Gearcase
— Removing the Timing Gear, Camshaft and Oil Pump
— Servicing the Timing Gear and Camshaft
— Servicing the Crankshaft
— Servicing the Cylinder Liners
— Lubrication System
— Oil Pump Service
— Water Pump Service
– ENGINE ASSEMBLY
— Installing the Crankshaft
— Installing the Pistons
— Installing the Camshaft and Timing Gears
— Installing the Gearcase
TECHNICAL DATA
– HYDRAULIC EXCAVATOR SPECIFICATIONS
— Machine Dimensions
— Lifting Capacity
— OPERATIONS & PERFORMANCE
— ENGINE
— HYDRAULIC SYSTEM
— SWING SYSTEM
— CYLINDER CYCLE TIMES
— HYDRAULIC CYLINDERS
— DRIVE SYSTEM
— UNDERCARRIAGE
— BRAKES
— TRACK
— CAPACITIES
— DIGGING FORCE
– ENGINE SPECIFICATIONS
— Fuel Injection Nozzles
— Fuel Injection Pump
— Cylinder Head
— Valves
— Valve Springs
— Rocker Arms
— Camshaft
— Cylinder
— Piston Rings
— Pistons
— Crankshaft
— Oil Pump
— Engine Oil Specifications
— Engine Bolt Torque
— Re–Grinding The Crankshaft
– FUEL, COOLANT AND LUBRICANTS
– OIL SPECIFICATIONS
— Description
– BUCKET SPECIFICATIONS
SERVICE MANUAL REVISIONS
– 331-1
– 331-2
– 331-3
– 331-4
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