Bobcat L28 B4LD11001 & Up, B4Y611001 & Up 7389400 (Preview)
MAINTENANCE SAFETY WARNINGS
MAINTENANCE SAFETY WARNINGS
CONTENTS
FOREWORD
FOREWORD
General Inspection
SAFETY INSTRUCTIONS
Call Before You Dig
Silica Dust Exposure
FIRE PREVENTION
Maintenance
Operation
Electrical
Hydraulic System
Fueling
Starting
Spark Arrester Exhaust System
Welding And Grinding
Fire Extinguishers
MACHINE SERIAL NUMBER
Engine Serial Number
DELIVERY REPORT
MACHINE IDENTIFICATION
Machine Front
Machine Rear
SAFETY AND MAINTENANCE
LIFTING AND BLOCKING THE SMALL ARTICULATED LOADER
Lifting And Blocking Procedure
LIFT ARM SUPPORT
Lift Arm Support Description
Installing The Lift Arm Support
Removing The Lift Arm Support
OPERATOR CANOPY / CAB
Operator Canopy / Cab Description
TRANSPORTING THE MACHINE
Loading And Unloading
Fastening
TOWING THE MACHINE
Towing The Machine
REMOTE START TOOL (SERVICE TOOL) KIT – 7217666
Remote Start Tool Description
Remote Start Tool – 7022042
Service Tool Harness – 6689747
Computer Service Tool Harness – 6689746
SERVICE SCHEDULE
Maintenance Intervals
ENGINE AIR CLEANER
Replacing Engine Air Cleaner Filters
Replacing Outer Filter
Replacing The Inner Filter
ENGINE COOLING SYSTEM
Cleaning Engine Cooling System
Checking And Adding Coolant
Replacing Coolant
FUEL SYSTEM
Fuel Specifications
U.S. Standard (ASTM D975)
E.U. Standard (EN590)
Biodiesel Blend Fuel
Filling The Fuel Tank
Removing Water From Fuel Filter
Replacing Fuel Filter
Removing Air From The Fuel System
ENGINE LUBRICATION SYSTEM
Checking And Adding Engine Oil
Engine Oil Chart
Replacing Engine Oil And Filter
HYDRAULIC / HYDROSTATIC SYSTEM
Checking And Adding Hydraulic Fluid
Hydraulic Fluid Chart
Replacing Hydraulic Fluid
Replacing The Hydraulic / Hydrostatic Filter
BOB-TACH (HAND LEVER)
Inspecting And Maintaining Hand Lever Bob-Tach
BOB-TACH (POWER)
Inspecting And Maintaining Power Bob-Tach
MACHINE LUBRICATION
Lubricating Grease Fittings
Lubrication Locations
Lift Arm
Lift Cylinder
Right Side
Bob-Tach
TIRE MAINTENANCE
Checking Wheel Nut Torque
Mounting Tires
MACHINE STORAGE AND RETURN TO SERVICE
Extended Storage Procedure
Returning The Machine To Service
STOPPING THE ENGINE AND LEAVING THE MACHINE
Stopping The Engine And Leaving The Machine
EMERGENCY EXITS
Performing An Emergency Exit
SEAT BELT
Inspecting And Maintaining The Seat Belt
SPARK ARRESTER MUFFLER
Cleaning The Spark Arrester Muffler
HYDRAULIC SYSTEM
HYDRAULIC/HYDROSTATIC SCHEMATICS NO OPTIONS
HYDRAULIC/HYDROSTATIC SCHEMATICS ALL OPTIONS
HYDRAULIC SYSTEM INFORMATION
Glossary Of Hydraulic / Hydrostatic Symbols
Flow Lines and Connections
Basic and Miscellaneous Symbols
Cylinder
Pump
Motor
Control Mechanisms
Non-Return Valve, Shuttle Valve
Directional Control Valve
Pressure Control Valve
Flow Control Valve
Miscellaneous
Troubleshooting The Hydraulic System
Articulation Joint Hydraulic Hose Routing
LIFT CYLINDER
Testing Lift Cylinder
Removing And Installing Lift Cylinder
Lift Cylinder Parts Identification
Disassembling Lift Cylinder
Assembling Lift Cylinder
TILT CYLINDER
Testing Tilt Cylinder
Removing And Installing Tilt Cylinder
Tilt Cylinder Parts Identification
Disassembling Tilt Cylinder
Assembling Tilt Cylinder
LEVELING CYLINDER
Testing Leveling Cylinder
Removing And Installing Leveling Cylinder
Parts Identification
Disassembling Leveling Cylinder
Assembling Leveling Cylinder
TELESCOPIC CYLINDER
Testing Telescopic Cylinder
Removing And Installing Telescopic Cylinder
Telescopic Cylinder Parts Identification
Disassembling Telescopic Cylinder
Assembling Telescopic Cylinder
STEERING CYLINDER
Testing Steering Cylinder
Removing And Installing Steering Cylinder
Parts Identification
Disassembling Steering Cylinder
Assembling Steering Cylinder
BOB-TACH CYLINDER
Testing Bob-Tach Cylinder
Removing And Installing Bob-Tach Cylinder
Bob-tach Cylinder Parts Identification
Disassembling Bob-tach Cylinder
Assembling Bob-Tach Cylinder
MAIN RELIEF VALVE
Main Relief Valve Description
Testing Main Relief Valve
Removing And Installing Main Relief Valve
Adjusting Main Relief Valve
PORT RELIEF VALVE
Port Relief Valve Description
Testing Lift Port Relief Valve (Base End)
Testing Lift Port Relief Valve (Rod End)
Tilt Port Relief Valve Testing
HYDRAULIC CONTROL VALVE
Hydraulic Control Valve Description
Removing And Installing Hydraulic Control Valve
Hydraulic Control Valve Identification Chart
Disassembling Hydraulic Control Valve
Disassembling And Assembling End Valve Section
Disassembling And Assembling Lift Valve Section
Disassembling And Assembling Tilt Valve Section
Disassembling And Assembling Telescopic Valve Section
Disassembling And Assembling Auxiliary Valve Section
Assembling Hydraulic Control Valve
PILOT MANIFOLD
Pilot Manifold Description
Removing And Installing Pilot Manifold
Pilot Manifold Parts Identification
Disassembling And Assembling Pilot Manifold
LIFT ARM BYPASS CONTROL
Lift Arm Control (Bypass) Description
Testing Lift Arm Control (Bypass)
IMPLEMENT PUMP
Implement Pump Description
Testing Lift, Tilt, Telescopic, And Auxiliary Sections
Removing And Installing Implement Pump
Implement Pump Parts Identification
Disassembling And Assembling Implement Pump
STEERING CONTROL UNIT
Steering Control Unit Description
Removing And Installing Steering Control Unit
Steering Control Unit Parts Identification
Disassembling And Assembling Steering Control Unit
HYDRAULIC / HYDROSTATIC FILTER
Hydraulic / Hydrostatic Filter Description
Removing And Installing Housing
JOYSTICK
Joystick Description
Removing And Installing Handle
HYDRAULIC FLUID RESERVOIR
Hydraulic Fluid Reservoir Description
Removing And Installing Hydraulic Reservoir
Removing And Installing Hydraulic Fluid Screen
OIL COOLER
Oil Cooler Description
Removing And Installing Oil Cooler
DRIVE PEDAL
Removing And Installing Drive Pedal
Disassembling And Assembling Drive Pedal
POWER BOB-TACH BLOCK
Power Bob-Tach Description
Removing And Installing Power Bob-Tach Block
Disassembling And Assembling Power Bob-Tach Block
AUXILIARY HYDRAULIC COUPLER BLOCK
Coupler Block Description
Removing And Installing Coupler Block
Disassembling And Assembling Coupler Block
TELESCOPIC MANIFOLD
Telescopic Manifold Description
Removing And Installing Telescopic Manifold
Telescopic Manifold Parts Identification
Disassembling And Assembling Telescopic Manifold
TRACTION ASSIST
Traction Assist Description
Removing And Installing Traction Assist
Traction Assist Parts Identification
Disassembling And Assembling Traction Assist
CASE DRAIN MANIFOLD
Case Drain Manifold Description
Removing And Installing Case Drain Manifold
HYDROSTATIC SYSTEM
HYDROSTATIC SYSTEM INFORMATION
Hydrostatic System Troubleshooting Chart
Hydrostatic System Description
HYDROSTATIC MOTOR (SAPR BRAKE)
Hydrostatic Motor (SAPR Brake) Description
Removing And Installing Hydrostatic Motor (SAPR Brake)
Hydrostatic Motor (SAPR Brake) Parts Identification
Disassembling Hydrostatic Motor (SAPR Brake)
Assembling Hydrostatic Motor (SAPR Brake)
HYDROSTATIC MOTOR
Hydrostatic Motor Description
Removing And Installing Hydrostatic Motor
Hydrostatic Motor Parts Identification
Disassembling Hydrostatic Motor
Assembling Hydrostatic Motor
HYDROSTATIC PUMP
Hydrostatic Pump Description
Removing And Installing Hydrostatic Pump
Removing Air From Hydrostatic Servo Control
Disassembling And Assembling Hydrostatic Pump
TURF TRACTION MANIFOLD
Turf Traction Manifold Description
Removing And Installing Turf Traction Manifold
Turf Traction Manifold Parts Identification
Disassembling And Assembling Turf Traction Manifold
MAINFRAME
CAB
Removing And Installing Enclosure
Removing And Installing Front Window
Removing And Installing Wiper Motor
Removing And Installing Rear Window
Removing And Installing Side Window
Removing And Installing Door
Removing And Installing Armrest
Removing And Installing Dash Cover
Removing And Installing Steering Wheel
Removing And Installing Operator Seat
Removing And Installing Floor Panel
BOB-TACH (HAND LEVER)
Bob-Tach Hand Lever Description
Removing And Installing Bob-Tach Hand Lever
Disassembling And Assembling Bob-Tach Hand Lever
BOB-TACH (POWER)
Removing And Installing Bob-Tach Power
Disassembling And Assembling Bob-Tach Power
LEVELING LINK
Removing And Installing Leveling Link
LIFT ARM
Removing And Installing Lift Arm
TELESCOPIC LIFT ARM
Removing And Installing Telescopic Lift Arm
Inspecting Lift Arm Wear Pads – Extended
Inspecting Lift Arm Wear Pads – Retracted
COVERS
Removing And Installing Rear Cover
Removing And Installing Right Rear Cover
Removing And Installing Left Rear Cover
Removing And Installing Center Cover
Removing And Installing Pump Cover
Removing And Installing Right Front Cover
Removing And Installing Right Corner Cover
Removing And Installing Left Front Cover
COUNTERWEIGHT
Removing The Counterweight
FUEL TANK
Removing And Installing Fuel Tank
Removing And Installing Fuel Level Sender
CAB BUMPERS
Removing And Installing Cab Bumpers
REAR GRILLE
Removing And Installing Rear Grille
ARTICULATION PIN
Removing And Installing Articulation Pin
ELECTRICAL SYSTEM
ELECTRICAL SCHEMATICS
ELECTRICAL SYSTEM INFORMATION
Glossary Of Electrical Symbols
Connections
Components
Senders And Sensors
Electrical System Troubleshooting Chart
Electrical System Description
Fuse And Relay Identification
BATTERY
Battery Maintenance
Maintaining Battery Charge Level
Battery Service During Machine Storage
Testing The Battery
Battery Charging
Removing And Installing The Battery
Using A Booster Battery (Jump Starting)
ALTERNATOR
Alternator Belt Adjustment
Alternator Belt Replacement
Charging System Inspection
Testing Alternator Voltage
Removing And Installing Alternator
Alternator Parts Identification
STARTER
Testing Starter
Removing And Installing Starter
Starter Parts Identification
INSTRUMENT PANEL
Removing And Installing Display Panel
LIGHTS
Removing And Installing Front Lights
Removing And Installing Rear Light
GATEWAY CONTROLLER
Controller Description
Removing And Installing Gateway Controller
DIAGNOSTIC SERVICE CODES
Viewing Service Codes
Service Codes List
OPERATOR INTERLOCK CONTROL SYSTEM
Operator Interlock Control System Description
Operating The Operator Interlock Control System
Inspecting The Operator Interlock Control System
Inspecting Deactivation Of The Auxiliary Hydraulics System (Engine STOPPED – Key On)
Inspecting The Armrest Sensor (Engine RUNNING)
Inspecting The Travel Pedal Interlocks (Engine RUNNING)
Inspecting The Lift Arm Bypass Control
ARMREST
Armrest Sensor Description
Removing And Installing Armrest Sensor
SERVICE PC (LAPTOP COMPUTER)
Connecting The Remote Start Tool (Service Tool)
ELECTRIC COOLING FAN
Electric Cooling Fan Description
Removing And Installing Electric Cooling Fan
BACK-UP ALARM
Back-Up Alarm System Description
Inspecting The Back-Up Alarm System
Troubleshooting Back-up Alarm
Removing And Installing Back-up Alarm
FRONT HORN
Removing And Installing Front Horn
FUEL LEVEL SENDER
Removing And Installing Fuel Level Sender
Testing Fuel Level Sender
KEY SWITCH
Removing And Installing Key Switch
BATTERY DISCONNECT SWITCH
Battery Disconnect Switch Description
Removing And Installing Battery Disconnect Switch
ENGINE SERVICE
ENGINE INFORMATION
Engine Description
Specifications
Fuel Injection Nozzles
Fuel Injection Pump
Cylinder Head
Valves
Valve Springs
Rocker Arms
Camshaft
Tappet
Push Rod
Cylinders
Piston Rings
Pistons
Oil Pump
Crankshaft
Timing Gear
Governor Gear
Thermostat
Engine Bolt Torque
Crankshaft Re-Grind Data
Torque For Kubota® Metric Bolts
Engine Troubleshooting
Removing And Installing Engine
Checking Compression
ENGINE SPEED CONTROL (LEVER)
Removing And Installing Engine Speed Control (Lever)
Calibrating Engine Speed Control
MUFFLER
Removing Muffler
Installing Muffler
EXHAUST TUBE
Removing And Installing Exhaust Tube
AIR CLEANER
Removing And Installing Air Cleaner
ENGINE COOLING SYSTEM
Removing And Installing Coolant Recovery Tank
Removing And Installing Radiator
Removing and Installing Fan and Pulley
Removing And Installing Water Pump
Assembling And Disassembling Water Pump
Removing And Installing Thermostat Housing
Checking Thermostat
LUBRICATION SYSTEM
Removing And Installing Oil Pan
Removing And Installing Oil Pump
Inspecting Oil Pump
Testing Engine Oil Pressure
FUEL SYSTEM
Checking Fuel Shutoff Solenoid
Removing And Installing Fuel Shutoff Solenoid
Checking Fuel Injection Pump
Removing And Installing Fuel Injection Pump
Timing Fuel Injection Pump
Removing And Installing Fuel Camshaft
Fuel Camshaft Governor
Removing And Installing Fuel Injector
Checking Fuel Injector Nozzle Pressure
Checking Nozzle Spray Condition
Valve Seat Tightness
CYLINDER HEAD
Testing Glow Plugs
Removing And Installing Glow Plugs
Adjusting Valve Clearance
Checking Valve Timing
Removing And Installing Cylinder Head
Disassembling And Assembling Cylinder Head
Servicing Cylinder Head
Checking Cylinder Head Top Clearance
Checking Valve Guide
Removing And Installing Valve Guide
Reconditioning The Valve And Valve Seat
Checking Valve Spring
Checking Valve Tappets
Checking Rocker Arm And Shaft
Checking Push Rod Alignment
CRANKSHAFT AND PISTONS
Removing And Installing Piston And Connecting Rod
Servicing Piston And Connecting Rod
Checking Cylinder Bore
Connecting Rod Alignment
Removing And Installing Crankshaft Gear
Removing And Installing Crankshaft And Bearings
Servicing Crankshaft And Bearings
CAMSHAFT AND TIMING GEARS
Removing And Installing Timing Gearcase Cover
Checking Timing Gear Backlash
Removing And Installing Idle Gear And Shaft
Servicing Camshaft
Servicing Idler Gear And Shaft
FLYWHEEL AND HOUSING
Removing And Installing Hydrostatic Pump Coupler
Removing And Installing Flywheel
Removing And Installing Flywheel Ring Gear
HEATING AND VENTILATION SYSTEM
REGULAR MAINTENANCE
Maintaining Fresh Air / Recirculation Filter
TROUBLESHOOTING
Troubleshooting Heating And Ventilation
Electrical System
HEATER UNIT
Removing And Installing Heater Unit
HEATER VALVE
Removing And Installing Heater Valve
HEATER COIL
Removing And Installing Heater Coil
BLOWER FAN
Removing And Installing Blower Fan
SPECIFICATIONS
MACHINE SPECIFICATIONS
Machine Dimensions
Tire Specifications
Performance Specifications — 7424423
With Standard Counterweight
With Add-On Counterweight
Control Specifications
Engine Specifications
Engine Specifications
Hydraulic System Specifications
Hydraulic System Specifications
Electrical System Specifications
Drive System Specifications
Fluid Capacities Specifications
Tire Specifications
Environmental Specifications
Temperature Range
TECHNICAL SERVICE GUIDE SPECIFICATIONS
Engine
Engine Torques
Small Articulated Loader Torques
Cooling System
TORQUE SPECIFICATION FOR BOLTS
Torque For General SAE Bolts
Torque For General Metric Bolts
HYDRAULIC CONNECTION SPECIFICATIONS
O-ring Face Seal Connection
Straight Thread O-ring Fitting
Tubelines And Hoses
Tightening The Flare Fitting
O-ring Flare Fitting
Port Seal Fitting
Push To Connect Fittings
HYDRAULIC FLUID SPECIFICATIONS
Specifications
CONVERSIONS
Decimal And Millimeter Equivalent Chart
U.S. To Metric Conversion Chart
SERVICE TOOLS REQUIRED
Remote Start Tools
Hydraulic Tools
Engine Tools
Electrical Tools
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