Bobcat X331 Excavator Repair Service Manual – 6722918

(S/N: 511920001 & Above)
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This workshop repair service manual PDF download for the X-331 Bobcat Mini Hydraulic Excavator 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 Excavator X 331
S/N: 511920001 & Above

TABLE OF CONTENTS :

SAFETY INSTRUCTIONS
SERIAL NUMBER LOCATIONS
DELIVERY REPORT
HYDRAULIC EXCAVATOR IDENTIFICATION
PREVENTIVE MAINTENANCE
HYDRAULIC SECTION
DRIVE SECTION
UPPER WORKS & SWING SECTION
MAIN FRAME & TRACKS
ELECTRICAL SYSTEM
ENGINE SERVICE
TECHNICAL DATA
SERVICE MANUAL REVISION

MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
P/N : 6722918 (5–94)
Total Pages : 349

This service repair workshop 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
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 REVISION
331-1
331-2
331-3

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