Bobcat 751 Skid-Steer Loader Repair Service Manual – 6900975

(S/N: 515730001 & Above) – (S/N: 515620001 & Above)
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This workshop repair service manual PDF download for the 751 Bobcat Skid-Steer Loader 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 Loader 751
(S/N: 515730001 & Above)
(S/N: 515620001 & Above)

TABLE OF CONTENTS :

FOREWORD
SAFETY INSTRUCTIONS
SERIAL NUMBER LOCATIONS
DELIVERY REPORT
LOADER IDENTIFICATION
SAFETY & MAINTENANCE
HYDRAULIC SYSTEM
HYDROSTATIC SYSTEM
DRIVE SYSTEM
MAIN FRAME
ELECTRICAL SYSTEM & ANALYSIS
ENGINE SERVICE
HEATER
SPECIFICATIONS
SERVICE MANUAL REVISIONS

MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
P/N : 6900975 (2-06)
Total Pages : 563

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MAINTENANCE SAFETY
ALPHABETICAL INDEX
CONTENTS
FOREWORD
SAFETY INSTRUCTIONS
Fire Prevention
SERIAL NUMBER LOCATIONS
Loader Serial Number
Engine Serial Number
DELIVERY REPORT
LOADER IDENTIFICATION

SAFETY & MAINTENANCE
BOBCAT INTERLOCK CONTROL SYSTEM (BICS™)
Inspecting The BICS™ Controller (Engine STOPPED – Key ON)
Inspecting Deactivation Of The Auxiliary Hydraulics
System (Engine STOPPED – Key ON)
Inspecting The Seat Bar Sensor (Engine RUNNING)
Inspecting The Traction Lock (Engine RUNNING)
Inspecting The Lift Arm By-Pass Control
Additional Inspection For Loaders With Advanced
Hand Controls (AHC)
LIFTING AND BLOCKING THE LOADER
Procedure
TRANSPORTING THE BOBCAT LOADER
Procedure
TOWING THE LOADER
Procedure
LIFT ARM SUPPORT DEVICE
Engaging The Lift Arm Support Device
Disengaging The Lift Arm Support Device
BOB-TACH
Inspection and Maintenance
OPERATOR CAB
Description
Raising The Operator Cab
Lowering The Operator Cab
Emergency Exit
SEAT BAR RESTRAINT SYSTEM (FOOT PEDALS)
Description
Inspecting the Seat Bar
Maintaining the Seat Bar
SEAT BAR RESTRAINT SYSTEM (ADVANCED HAND CONTROLS)
Description
Inspecting the Seat Bar
Maintaining the Seat Bar
REMOTE START
Procedure
SERVICE SCHEDULE
Chart
FUEL SYSTEM
Fuel Specifications
Filling the Fuel Tank
Fuel Filter
Removing Air From The Fuel System
AIR CLEANER SERVICE
Checking
ENGINE LUBRICATION SYSTEM
Checking Engine Oil
Oil Chart
Replacing Oil And Filter
ENGINE COOLING SYSTEM
Cleaning The Cooling System
Checking The Coolant Level
Replacing The Coolant
HYDRAULIC/HYDROSTATIC SYSTEM
Checking And Adding Fluid
Replacing Hydraulic/Hydrostatic Filter
Replacing Hydraulic Fluid and Case Dain Filters
Breather Cap
TIRE MAINTENANCE
Wheel Nuts
Rotating
Mounting
LUBRICATION OF THE BOBCAT LOADER
Procedure

HYDRAULIC SYSTEM
HYDRAULIC/HYDROSTATIC SCHEMATICS
HYDRAULIC SYSTEM INFORMATION
Tighten Procedures
Troubleshooting Chart
CYLINDER(S)
Checking The Lift Cylinders
Lift Cylinders Removal And Installation
Checking The Tilt Cylinder
Tilt Cylinder Removal And Installation
Lift Cylinder Identification
Tilt Cylinder Identification
Disassembly
Assembly
MAIN RELIEF VALVE
Checking
Adjustment
Removal and Installation
BICS™ VALVE
Removal And Installation
Lift Arm By-Pass Orifice Dissembly And Assembly
Check Valve Dissembly And Assembly
Lock Valve Dissembly And Assembly
Solenoid Dissembly And Assembly
Solenoid Testing
HYDRAULIC CONTROL VALVE (FOOT CONTROL)
Removal And Installation
Identification Chart
Load Check Valve
Main Relief Valve
Port Relief Valve
Anti-Cavitation Valve
Plug
Rubber Boot
Lift And Tilt Lock Block
Lift Spool and Detent
Tilt Spool Removal And Installation
Auxiliary Spool Removal And Installation
Auxiliary Electric Solenoid Disassembly
Port-Auxiliary Section Disassembly
Cleaning And Inspection
HYDRAULIC CONTROL VALVE (AHC)
Removal And Installation
Actuator Removal And Installation
Identification Chart
Lift Base End Restrictor
Load Check Valve
Main Relief Valve
Port Relief Valve
Anti-Cavitation Valve
Plug
Lift Spool Removal And Installation
Tilt Spool Removal And Installation
Lift and Tilt Spool Disassembly And Assembly
Auxiliary Spool Removal And Installation
Auxiliary Electric Solenoid Disassembly
Port-Auxiliary Section Disassembly
Cleaning And Inspection
LIFT ARM BY-PASS CONTROL VALVE
Inspecting
Additional Inspection For Loaders With Advanced Hand Controls
Removal And Installation
Disassembly And Assembly
HYDRAULIC PUMP (ALUMINUM)
Checking The Output Of The Hydraulic Pump
Removal And Installation
Parts Identification
Disassembly And Assembly
Inspection
HYDRAULIC FILTER HOUSING
Removal And Installation
HYDRAULIC FLUID RESERVOIR
Removal And Installation
CONTROL PEDALS
Removal And Installation
Pedal Adjustment
BUCKET POSITION VALVE
Solenoid Removal And Installation
Solenoid Testing
Removal And Installation
Disassembly And Assembly
FRONT AUXILIARY PRESSURE RELIEF BLOCK
Removal And Installation
Disassembly And Assembly
Solenoid Testing
Solenoid Inspection

HYDROSTATIC SYSTEM
HYDROSTATIC SYSTEM INFORMATION
Troubleshooting Chart
Replenishing Valve Function
CONTROL PANEL
Removal and Installation
STEERING
Shock Removal And Installation
Steering Shaft Removal And Installation
Shaft Disassembly And Assembly
Lever Removal And Installation
Rubber Boot Replacement
Linkage Removal And Installation
Linkage Adjustment
Neutral Adjustment
STEERING (ADVANCE HAND CONTROL) (AHC)
Components Identification
Handle Control Unit Removal And Installation
Steering Handle Removal and Installation
Steering Handle Disassembly and Assembly
Lever Removal and Installation
Steering Lever Boot
STEERING (ADVANCED HAND CONTROL) (AHC) W/ PUSH BUTTON FLOAT
Components Identification
Handle Sensor Removal And Installation
Control Handle Removal And Installation
Control Handle Disassembly And Assembly
Control Lever Removal And Installation
Control Lever Boot
HYDROSTATIC MOTOR
Removal And Installation
Parts Identification
Disassembly
Assembly
Carrier Shaft Seal Replacement
Carrier Removal And Installation
HYDROSTATIC MOTOR
Carrier Parts Identification
Carrier Disassembly
Carrier Assembly
CHARGE PRESSURE
Sender Removal And Installation
Checking Charge Pressure
Adjusting
HYDROSTATIC PUMP
Replenishing/High Pressure Relief Valve
Removal And Installation
Parts Identification (Right Half)
Parts Identification (Left Half)
Hydraulic Pump Removal And Installation
Pump Separation
Disassembly
Assembly
DRIVE BELT
Shield Removal And Installation
Adjusting
Drive Belt Replacement
Tensioner Pulley Removal And Installation
Tensioner Pulley Parts Identification
Tensioner Pulley Disassembly
Tensioner Pulley Assembly
OIL COOLER
Removal and Installation

DRIVE SYSTEM
BRAKE
Pedal Removal And Installation
Pedal Disassembly And Assembly
Disc Removal And Installation
DRIVE COMPONENTS
Axle Seal Removal And Installation
Axle Sprocket And Bearings Removal And Installation
Chain Removal And Installation
CHAINCASE
Checking And Adding Oil
Removing The Oil
Front Cover Removal And Installation
Center Cover Removal And Installation
Rear Cover Removal And Installation

MAIN FRAME
SEAT BAR
Removal And Installation
Assembling Components
Compression Spring Disassembly And Assembly
OPERATOR CAB
Gas Cylinder Removal And Installation
Gas Cylinder Disassembly
Removal And Installation
OPERATOR SEAT
Removal And Installation
Slide Rail Removal And Installation
Cushion Removal And Installation
Back Removal And Installation
Shock Removal And Installation
BOB-TACH
Removal And Installation
Bob-Tach Lever And Wedge
Bob-Tach Stops
LIFT ARM
Removal And Installation
REAR GRILL
Gas Cylinder Removal And Installation
Removal And Installation
REAR DOOR
Removal And Installation
Door Latch And Catch Adjustment
Door Latch Removal And Installation
FUEL TANK
Removal And Installation
Fuel Level Sender

ELECTRICAL SYSTEM & ANALYSIS
ELECTRICAL SCHEMATICS
ELECTRICAL SYSTEM INFORMATION
WIRING SCHEMATICS
Troubleshooting Chart
Description
Fuse Location
Relay Switch Location
Solenoid Test
BATTERY
Removal And Installation
Servicing
Using A Booster Battery (Jump Starting)
ALTERNATOR
Adjusting The Alternator Belt
Alternator Output Test
Rectifier (Diode) Test
Alternator Regulator Test
Removal And Installation
Disassembly
Stator Continuity Test
Stator Ground Test
Rotor Continuity Test
Rotor Ground Test
Rectifier Continuity (Diode) Test
Assembly
STARTER
Checking
Removal And Installation
Parts Identification
Disassembly
Inspection And Repair
No Load Test
Assembly
INSTRUMENT PANEL
Left Panel
Right Panel – (Standard) (With Key Switch)
Right Panel – (Deluxe) (With Keyless Start)
Right Panel Setup Display Options (Deluxe)
Passwords
Option and Field Accessory Panels
Removal And Installation
LIGHTS
Front Removal And Installation
Rear Removal And Installation
BOBCAT CONTROLLER
Identification Chart
Removal And Installation
DIAGNOSTICS
Service Codes
BICS™ SYSTEM
Inspecting The BICS™ Controller (Engine STOPPED – Key ON)
Inspecting Deactivation Of The Auxiliary Hydraulics
System (Engine STOPPED – Key ON)
Inspecting The Seat Bar Sensor (Engine RUNNING)
Inspecting The Traction Lock (Engine RUNNING)
Inspecting The Lift Arm By-Pass Control
Additional Inspection For Loaders With Advanced
Hand Controls (AHC)
Troubleshooting Chart
Troubleshooting Guide.
SEAT BAR SENSOR
Troubleshooting Chart
Test
Removal And Installation
BICS™ Circuit Test
TRACTION LOCK
Troubleshooting Chart
Inspecting
Solenoid Removal And Installation
Guide Removal
Guide Installation
ADVANCED HAND CONTROL (AHC) SYSTEM
Components Identification
ADVANCED HAND CONTROL (AHC) SYSTEM
Troubleshooting Guide
Parts Identification
AHC Controller Removal And Installation
Handle Control Unit Connector
Switch Handle Removal and Installation
Actuators Disassembly and Assembly
ADVANCED HAND CONTROL (AHC) SYSTEM
(W/PUSH BUTTON FLOAT)
Components Identification
Troubleshooting Guide
Controller Connector And Wire Identification
AHC Controller Removal And Installation
Handle Sensor Removal And Installation
Handle Sensor Connector
Switch Handle Removal And Installation
Actuators Disassembly And Assembly
ELECTRICAL/HYDRAULIC CONTROLS REFERENCE
Controls Identification Chart

ENGINE SERVICE
TROUBLESHOOTING
Chart
ENGINE SPEED CONTROL
Removal And Installation
Disassembly
MUFFLER
Removal And Installation
Spark Arrestor Cleaning Procedure
AIR CLEANER
Replacing Filter Element(s)
Removal And Installation
RADIATOR
Removal And Installation
COOLING FAN
Drive Tension Pulley Removal And Installation
Gearbox/Blower Housing Removal And Installation
Blower Housing Grill Removal And Installation
Blower Disassembly And Assembly
Gearbox Parts Identification
Gearbox Disassembly
Gearbox Assembly
Gearbox Checking Backlash
ENGINE COMPONENTS AND TESTING
Compression Checking
Glow Plugs Checking
Glow Plugs Removal And Installation
Fuel Shut-Off Solenoid, Checking
Fuel Shut-Off Solenoid, Adjusting
Fuel Shut-Off Solenoid Removal And Installation
Checking
Fuel Injection Pump Removal And Installation
Timing The Injection Pump
Fuel Injector Removal And Installation
Fuel Injector Checking
Fuel Injector Disassembly
Fuel Injector Assembly
Valve Clearance Adjustment
Rocker Arm And Shaft Checking
Valve Timing, Checking
ENGINE
Removal And Installation
Engine Mount Replacement
FLYWHEEL AND HOUSING
Flywheel Removal And Installation
Ring Gear Removal And Installation
Housing Removal And Installation
RECONDITIONING THE ENGINE
Cylinder Head Removal And Installation
Cylinder Head Disassembly And Assembly
Cylinder Head Servicing
Cylinder Head Top Clearance
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
Fuel Camshaft 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
Checking The Cylinder Bore
Water Pump Disassembly And Assembly

HEATER
COMPONENTS
Identification
REGULAR MAINTENANCE
Filter Elements Removal And Installation
BASIC TROUBLESHOOTING
Cleaning The Heater Coil
Checking The Electrical System
Engine Coolant By-Passing The Heater Valve
Heater Valve Not Opening Or Closing
SYSTEM TROUBLESHOOTING CHART
Blower Motor Does Not Operate
Blower motor operators normally, but air flow is insufficient
HEATER UNIT
Removal And Installation
Disassembly And Assembly
HEATER COIL
Removal And Installation
HEATER FAN
Removal And Installation
Disassembly And Assembly
Wire Connector Removal and Installation
HEATER VALVE
Removal and Installation
Disassembly And Assembly

SPECIFICATIONS
LOADER SPECIFICATIONS
Specifications
Performance
Controls
Engine
Hydraulic System
Electrical
Drive System
Capacities
Tires
Floor Pressure
ENGINE SPECIFICATIONS
Fuel Injection Nozzles
Fuel Injection Pump
Cylinder Head
Valves
Valve Springs
Valve Timing
Rocker Arms
Camshaft
Tappet
Cylinders
Piston Rings
Pistons
Connecting Rod
Oil Pump
Crankshaft
Timing Gear
Thermostat
Crankshaft Re-Grind Data
LOADER TORQUE
Specifications
TORQUE SPECIFICATIONS 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
Flare Fitting
O-ring Flare Fitting
Port Seal Fitting
HYDRAULIC FLUID SPECIFICATIONS
Specifications
CONVERSIONS
Decimal And Millimeter Equivalents
U.S. To Metric Conversion

SERVICE MANUAL REVISIONS
Revision No: 751-1
Revision No: 751-2

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