331 (S/N: 512913001 & Above) - 331E (S/N: 517711001 & Above) - 334 (S/N: 516711001 & Above)
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This service manual PDF download for the X331 / X331E / X334 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 X-331 / X-331E / X-334
X 331 (S/N: 512913001 & Above)
X 331E (S/N: 517711001 & Above)
X 334 (S/N: 516711001 & Above)
TABLE OF CONTENTS :
SAFETY INSTRUCTIONS
FOREWORD
SERIAL NUMBER LOCATIONS
DELIVERY REPORT
MACHINE SIGNS TRANSLATIONS (Decals)
HYDRAULIC EXCAVATOR IDENTIFICATION
PREVENTIVE MAINTENANCE
HYDRAULIC SYSTEM
DRIVE SYSTEM
UPPER WORKS & SWING SECTION
MAIN FRAME & TRACKS
ELECTRICAL SYSTEM
ENGINE SERVICE
SPECIFICATIONS
SERVICE MANUAL REVISION
MANUAL SPECIFICATION :
File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
P/N : 6900464 (2–98)
Total Pages : 525
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MAINTENANCE SAFETY
ALPHABETICAL INDEX
CONTENTS
FOREWORD
SERIAL NUMBER LOCATIONS
HYDRAULIC EXCAVATOR SERIAL NUMBER
ENGINE SERIAL NUMBER
DELIVERY REPORT
HYDRAULIC EXCAVATOR IDENTIFICATION
PREVENTIVE MAINTENANCE
SERVICE SCHEDULE (331 S/N 512913001–512915199)
SERVICE SCHEDULE (331 S/N 512915200 & Above),(331E 517711001 & Above) & (334 S/N 516711001 & Above)
LIFTING AND BLOCKING THE EXCAVATOR
Procedure
TRANSPORTING THE EXCAVATOR
Procedure
ENGINE COVER
Opening The Engine Cover
Adjustment Of The Engine Cover Latch
AIR CLEANER
Air Cleaner Service
FUEL SYSTEM
Fuel Specification
Filling The Fuel Tank
Fuel System Maintenance (331 S/N 512913001–512915199)
Fuel Filter (331 S/N 512913001–512915199)
Removing Air From The Fuel System (331 S/N 512913001–512915199)
Fuel System Maintenance (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Fuel Filter (331 S/N 512915200 & Above), (331E S/N517711001 & Above) & (334 S/N 516711001 & Above)
Removing Air From The Fuel System (331 S/N512915200 & Above), (331E S/N 517711001 & Above)& (334 S/N 516711001 & Above)
ENGINE LUBRICATION SYSTEM
Checking Engine Oil
Replacement Of Oil And Filter
COOLING SYSTEM
Coolant Level
Coolant Replacement
ALTERNATOR BELT
Adjustment
ELECTRICAL SYSTEM
Using A Booster Battery (Jump Starting)
HYDRAULIC SYSTEM
Checking And Adding Fluid
Replacing The Hydraulic Oil
Replacing The Hydraulic Filter
Replacing The Drain Line Filter
SPARK ARRESTOR MUFFLER
Cleaning The Spark Arrestor Muffler (331 S/N 512913001–512915199)
Cleaning The Spark Arrestor Muffler (331 S/N512915200 & Above), (331E S/N 517711001 & Above)& (334 S/N 516711001 & Above)
TRAVEL MOTOR
Checking The Oil Level (331 S/N 512913001–512913404)
Draining And Refilling (331 S/N 512913001–512913404)
Checking The Oil Level (331 S/N 512913405 & Above),(331E S/N 517711001 & Above) & (334 S/N 516711001& Above)
Draining And Refilling (331 S/N 512913405 & Above),(331E S/N 517711001 & Above) & (334 S/N 516711001& Above)
LUBRICATION OF THE HYDRAULIC EXCAVATOR
Procedure
HEATER AIR FILTER (With Cab Option Only) (331 S/N512913001–512915199)
Service
HEATER AIR FILTER (With Cab Option Only) (331 S/N512915200 & Above), (331E S/N 517711001 & Above)& (334 S/N 516711001 & Above)
Service
HYDRAULIC SECTION
HYDRAULIC SCHEMATICS
HYDRAULIC SYSTEM TROUBLESHOOTING
HYDRAULIC SERVICE INFORMATION
Description
MAIN RELIEF VALVES (Adjustable)
Checking The Main Relief Valves
Testing the Blade, Boom Swing, Arm and Boost Circuit Relief Valves
Testing the Swing Circuit Relief
Testing The Auxiliary And Bucket Circuit Relief Valve
Testing The Left Hand Travel Circuit Relief Valve
Testing The Right Hand Travel Circuit Relief Valve
Testing The Boom Circuit Relief Valve
CROSS PORT RELIEF VALVE
Description
Testing
HYDRAULIC PUMP
Checking the Hydraulic Pump
Removal And Installation (331 S/N 512913001–512915199)
Parts Identification (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N516711001 & Above)
Disassembly (331 S/N 512913001–512915199)
Assembly (331 S/N 512913001–512915199)
HYDRAULIC CONTROL VALVE (5–Spool)
Left Travel, Right Travel, Boom, Bucket And Auxiliary
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N516711001 & Above)
Parts Identification
Disassembly
Outlet Sections Disassembly
Outlet Sections Assembly
Mid Inlet Section Disassembly
Mid Inlet Section Assembly
Left Travel, Right Travel and Auxiliary Disassembly
Left Travel, Right Travel and Auxiliary Assembly
Boom And Bucket Disassembly
Boom And Bucket Assembly
Assembly
PORT RELIEF VALVES AND MAIN RELIEF VALVES
Parts Identification
Port Relief Valve Pressure Setting
Disassembly
Assembly
Adjustment Procedure (Work Port Relief Valves Only)
MAIN RELIEF VALVES (Adjustable)
Parts Identification
Pressure Settings
Disassembly
Assembly
Adjusting The Main Relief Valves
HYDRAULIC CONTROL VALVE (5–Spool)
Boost, Arm, Boom Swing, Blade And Swing Section
Description
Removal And Installation
Parts Identification
Disassembly
Inlet Section Disassembly And Assembly
Arm, Boost And Swing Motor Disassembly
Arm, Boost And Swing Motor Assembly
Boom Swing Disassembly
Boom Swing Assembly
Blade Disassembly
Blade Assembly
Assembly
ACCUMULATOR / PRESSURE REDUCING VALVE (S/N 512913001 – 512918775, 517711001 – 517711159,516711001 – 516711880)
Description
Removal And Installation
Parts Identification
Disassembly
Assembly
ACCUMULATOR / PRESSURE REDUCING VALVE(S/N 512918776 & Above, 517711160 & Above and516711881 & Above)
Parts Identification
Disassembly
Assembly
ACCUMULATOR / PRESSURE REDUCING VALVE (For All Serial Numbers)
Testing
BUILD UP VALVE
Description
Removal And Installation
Disassembly And Assembly
AUXILIARY SELECTOR VALVE
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), 331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Disassembly And Assembly
Port Block
Removal And Installation
OIL COOLER
Removal And Installation
HYDRAULIC RESERVOIR AND FUEL RESERVOIR
Removal And Installation
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 (Standard And Long Arm)
Removal And Installation (Extendible Arm)
Parts Identification
BLADE CYLINDER
Removal And Installation
Parts Identification
BOOM SWING CYLINDER
Removal And Installation
Parts Identification
EXTENDIBLE ARM CYLINDER
Removal And Installation
HYDRAULIC CYLINDER
Disassembly
Assembly
JOYSTICK CONTROL CHANGE (331 S/N512913001–512917112 & 334 S/N 516711001–516711270)
ISO to STANDARD Control Pattern
STANDARD To ISO Control Pattern
DRIVE SECTION
RIGHT CONSOLE COVER (331 S/N 512913001–512915199)
Removal And Installation
RIGHT CONSOLE (331 S/N 512913001– 512915199)
Removal And Installation
Speed Control Lever Removal And Installation
Speed Control Lever Adjustment
Low Speed Position
High Speed Position
Blade Control Lever And Cable Removal AndInstallation
LEFT CONSOLE (331 S/N 512913001– 512915199)
Control Lock Micro–Switch Removal And Installation
Gas Spring Removal And Installation
Removal And Installation
Lock Lever Removal And Installation
Lock Lever Adjustment
Latch Plate Adjustment
RIGHT CONSOLE COVER (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Removal And Installation
Arm Rest Removal And Installation
Gauge Removal And Installation
RIGHT CONSOLE (331 S/N 512915200 & Above),(331E S/N 517711001 & Above) & (334 S/N 516711001& Above)
Swing Lock Lever Removal And Installation
Blade Lever Removal And Installation
Speed Control Lever Removal And Installation
Speed Control Lever Adjustment
LEFT CONSOLE COVER (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Removal And Installation
Arm Rest Removal And Installation
Switch Removal And Installation
Switch Description
Rear Cover Removal And Installation
Heater Control Removal And Installation
LEFT CONSOLE (331 S/N 512915200 & Above), (331ES/N 517711001 & Above) & (334 S/N 516711001 &Above)
Console And Mount Removal And Installation
Control Lock Micro–switch Removal And Installation
Lock Lever Removal And Installation
Gas Spring Removal And Installation
Console Removal And Installation
JOYSTICK
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation Of Right Hand Joystick(331 S/N 512915200 & Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Removal And Installation Of Left Hand Joystick (331S/N 512915200 & Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Troubleshooting
Parts Identification
Disassembly
Assembly
STEERING LEVERS AND PEDALS
Removal And Installation
Adjusting Linkage Rods
UPPER WORKS AND SWING SECTION
ENGINE COVER
Removal And Installation
SEAT AND SEAT MOUNT
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above). (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
FLOORMAT AND FLOOR PLATE
Removal And Installation
REAR FLOOR PLATE
Removal And Installation (331 S/N 512913001–512915199)
SWING MOTOR COVER
Removal And Installation
TOOL BOX
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
LEFT HAND SIDE COVER
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
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 (PIN ON)
Removal And Installation
BUCKET TEETH
Removal And Installation
X–CHANGE™
Removal And Installation
Disassembly
Assembly
EXTENDIBLE ARM
Removal And Installation
Disassembly And Assembly
ARM
Removal And Installation
ARM BUSHINGS
Arm To Boom Bushing Removal And Installation
Arm To Bucket And Bucket Link Removal And Installation
BOOM
Removal And Installation
BOOM BUSHING
Removal And Installation
BOOM SWING BRACKET
Removal And Installation
Hose Installation
SWING BRACKET BUSHING
Bushing Removal
Bushing Installation
BOOM PIVOT BUSHING
Bushing Removal
Bushing Installation
SWING MOTOR
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Cross Port Relief Valve Parts Identification
Cross Port Relief Valve Disassembly
Cross Port Relief Valve Assembly
Parts Identification
Disassembly
Assembly
SWING MOTOR DRIVE CARRIER
Removal And Installation
Parts Identification
Disassembly
Assembly
UPPERSTRUCTURE AND SWING CIRCLE GEAR
Removal And Installation
Swing Bearing Removal
Swing Bearing Installation
Alignment Pins (Not Threaded)
CENTER SWIVEL JOINT
Removal And Installation
Parts Identification
Disassembly
Assembly
ROPS CANOPY
Removal And Installation
CAB
Removal And Installation
Heater Removal And Installation (331 S/N512913001– 512915199)
Heater Removal And Installation (331 S/N 512915200& Above), (331E S/N 517711001 & Above) & (334 S/N516711001 & Above)
Heater Disassembly And Assembly (331 S/N512915200 & Above), (331E S/N 517711001 & Above)& (334 S/N 516711001 & Above)
Front Window Removal And Installation
Front Lower Window Removal And Installation
Front Upper Window Removal And Installation (331S/N 512913001–512915199)
Front Upper Window Removal And Installation (331S/N 512915200 & Above), (331E S/N 517711001 &Above) & (334 S/N 516711001 & Above)
Door Removal And Installation
Door Window Removal And Installation
Left Hand Side Window Removal And Installation
Right Hand Side Window Removal And Installation
Right Hand Window Assembly Removal And Installation
Rear Window Removal And Installation
CAB/CANOPY REAR COVER
Removal
Installation
MAIN FRAME AND TRACKS
BLADE
Removal And Installation
TRACK
Track Lug Height
Track Tension Adjustment
Rubber Track Clearance
Steel Track Clearance
Adjustment
Rubber Track Removal And Installation
Steel Track Removal And Installation
TRACK FRAME
Disassembly And Assembly
Recoil Spring Disassembly And Assembly
TRACK IDLER
Parts Identification
Disassembly
Assembly
TRACK ROLLER
Parts Identification
Disassembly
Assembly
TRAVEL MOTOR
Testing (331 S/N 512913001–512913404)
Removal And Installation
Parts Identification (331 S/N 512913001–512913404)
Disassembly (331 S/N 512913001–512913404)
Assembly (331 S/N 512913001–512913404)
Parts Identification (331 S/N 512913405 & Above),(331E S/N 517711001 & Above)(334 S/N 516711001 &Above)
Disassembly (331 S/N 512913405 & Above), (331E S/N517711001 & Above) & (334 S/N 516711001 & Above)
Assembly (331 S/N 512913405 & Above), (331E S/N517711001 & Above) & (334 S/N 516711001 & Above
TRACK DAMAGE IDENTIFICATION
Cutting Of Steel Cords
Abrasion Of Embedded Metals
Separation Of Embedded Metals
Separation Of Embedded Metals Due To Corrosion
Cuts On The Lug Side Rubber
Cracks Of The Lug Side Rubber Due To Fatigue
Lug Abrasion
Abrasion Of The Track Roller Side
Cuts On The Edges Of Track Roller Side
ELECTRICAL SYSTEM
ELECTRICAL SCHEMATICS
TROUBLESHOOTING
ELECTRICAL SYSTEM
Description
Fuses (331 S/N 512913001–512915199)
Fuse Arrangement (331 S/N 512913001–512915199)
Electrical Relays And Diodes (S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Fuse Arrangement (331 S/N 512915200 & Above),(331E S/N 517711001 & Above) & (334 S/N 516711001& Above)
BATTERY
Removal And Installation
Servicing The Battery
ALTERNATOR
Belt Adjustment
Removal And Installation
Alternator Output Test
Rectifier (Diode) Test
Alternator Regulator Test
Parts Identification
Disassembly And Inspection
Stator Continuity Test
Stator Ground Test
Rotor Continuity Test
Rotor Ground Test
Rectifier Continuity (Diode) Test
Assembly
STARTER
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Disassembly And Assembly (331 S/N 512913001–512915199)
Cleaning And Inspection (331 S/N 512913001–512915199)
Parts Identification (331 S/N 512913001–512915199)
Parts Identification (331 S/N 512915200 & Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Disassembly (331 S/N 512915200 & Above), (331E S/N517711001 & Above) & (334 S/N 516711001 & Above)
Inspection And Repair (331 S/N 512915200 & Above)& (334 S/N 516711001 & Above)
Assembly (331 S/N 512915200 & Above), (331E517711001 & Above) & (334 S/N 516711001 & Above)
FUEL LEVEL SENDER
Removal And Installation
Testing
INSTRUMENT PANEL (331 S/N 512913001–512915199)
Removal And Installation
GAUGES
Removal And Installation (331 S/N 512913001–512915199)
Bulb Replacement (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N516711001 & Above)
Bulb Replacement (331 S/N 512915200 & Above),(331E S/N 517711001 & Above) & (334 S/N 516711001& Above)
TIMER (331 S/N 512915200 & Above), (331E S/N517711001 & Above) & (334 S/N 516711001 & Above)
Removal And Installation
DIODES (331 S/N 512915200 & Above), (331E S/N517711001 & Above) & (334 S/N 516711001 & Above)
Diode Location
Diode Replacement
Diode Testing
CAB ELECTRICAL
Cab Option (331 S/N 512913001–512915199)
Cab Option (331 S/N 512915200 & Above), (331E S/N517711001 & Above) & (334 S/N 516711001 & Above)
HORN
Removal And Installation
BUZZER
Removal And Installation
ENGINE SERVICE
TROUBLESHOOTING
Chart
VALVE CLEARANCE
Adjustment
ENGINE COMPRESSION
Checking
GLOW PLUGS
Removal And Installation
Checking The Glow Plug
FUEL SHUT–OFF SOLENOID
Adjustment
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
FAN GUARD
Removal And Installation
RADIATOR
Removal And Installation
MUFFLER
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N516711001 & Above)
AIR CLEANER
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N516711001 & Above)
ENGINE
Removal And Installation
ENGINE FLYWHEEL
Removal And Installation (331 S/N 512913001–512915199)
Removal And Installation (331 S/N 512915200 &Above), (331E S/N 517711001 & Above) & (334 S/N 516711001 & Above)
Flywheel Ring Gear
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
Removal And Installation
Disassembly And Assembly
SPECIFICATIONS
HYDRAULIC EXCAVATOR SPECIFICATIONS
Machine Dimensions (331 S/N 512913001 & Above) Standard Arm
Machine Dimensions (331E S/N 517711001 & Above) Extendible Arm
Machine Dimensions (334 S/N 516711001 & Above) Long Arm
Lifting Capacity
WEIGHTS
CONTROLS
ENGINE
ELECTRICAL
HYDRAULIC SYSTEM
CYLINDER CYCLE TIME
SWING SYSTEM
HYDRAULIC CYLINDERS
DRIVE SYSTEM
BRAKES
UNDERCARRIAGE
STD TRACK SHOES
REFILL CAPACITIES
DIGGING FORCE
ENGINE SPECIFICATIONS
Fuel Injection Nozzles
Fuel Injection Pump
Cylinder Head
Valves
Valve Springs
Valve Timing
Rocker Arms
Camshaft
Tappet
Piston Rings
Pistons
Connecting Rod
Oil Pump
Crankshaft
Timing Gear
Thermostat
Engine Bolt Torque
Crankshaft Re–Grind Data
Torque For General Metric Bolts
FUEL, COOLANT AND LUBRICANTS
ENGINE OIL SPECIFICATIONS
Description
ANTI–FREEZE SOLUTION
Propylene Glycol
DECIMAL AND MILLIMETER EQUIVALENTS
U.S. TO METRIC CONVERSION
SERVICE MANUAL REVISION
331-1
331/334-2
331/334-3
331/334-4
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Bobcat X 331, X 331E, X 334 Excavator Repair Service Manual - 6900464.pdf
Source : Sitelux.com