Bobcat 974, 975 Skid Steer Loader Service Manual
320 pages · Publication 6556214_11_85
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From the manual's own table of contents: 22 sections, 520 entries. See sample pages (PDF, 183 KB)
MAINTENANCE SAFETY
FOREWORD5 topics
- SAFETY INSTRUCTIONS
- Safety Is Your Responsibility
- Before You Operate The Bobcat Loader
- Safe Operation Needs A Qualified Operator
- FIRE PREVENTION
PREVENTIVE MAINTENANCE
INTRODUCTION64 topics
- Symbols
- Serial Number Identification
- Loader Serial Number
- Engine Serial Number
- Pre-Delivery Inspection
- Hour Inspection
- SERVICE SCHEDULE
- REAR DOOR AND ENGINE COVER
- REMOVAL OF SIDE PANEL (FENDER)
- TILTING THE ROPS (Operator Enclosure)
- Tilting ROPS Forward
- To Lower ROPS
- CONTROL LEVER LOCK
- TO CLEAN ROPS ANS SKID PLATE AREA
- To Open The Skid Plate
- To Close The Skid Plate
- ENGINE MAINTENANCE
- Starting The Engine
- Engine Oil Check
- Specifications
- CRANKCASE VENT TUBE
- REPLACEMENT OF ENGINE OIL AND FILTER
- ENGINE AIR INLET SYSTEM (Air Cleaner)
- Air Cleaner Service
- Air Inlet System Service
- ENGINE COOLING SYSTEM
- FLUSHING THE COOLING SYSTEM
- ADJUSTMENT OF FAN BELT
- FUEL SYSTEM (General)
- FUEL SPECIFICATIONS
- FUEL SYSTEM SERVICE
- CHARGING FUEL SYSTEM
- FUEL SYSTEM SERVICE
- Fuel Pump
- Fuel Filter
- To Charge Fuel System
- Remove Air From Fuel System
- REMOVAL OF FUEL TANK
- ELECTRICAL SYSTEM MAINTENANCE
- ADJUSTMENT OF CLUTCH/BRAKE
- Clutch/Brake Spring
- HYDRAULIC/HYDROSTATIC SYSTEM (General)
- HYDRAULIC FLUID
- HYDRAULIC FLUID FILTERS
- HYDRAULIC RESERVOIR REMOVAL OF WATER OR HYDRAULIC FLUID
- HYDRAULIC FLUID TO CHECK, ADD OR REPLACE
- REMOVAL OF HYDRAULIC RESERVOIR
- TO CHECK FOR HYDRAULIC SYSTEM LEAKS
- TO CLEAN 100 MESH FILTER SCREEN
- OIL COOLER
- HYDROSTATIC TRANSMISSION
- FINAL DRIVE CHAIN
- TO TRANSPORT
- TIRES
- TIRE MAINTENANCE
- TIRE ROTATION
- TIRE REPLACEMENT
- LUBRICATION
- WHEEL NUTS
- BOB-TACH
- MELROE TRACKS
- To Install The Tracks (Tandem)
- Track Adjustment
- Tires Damaged By Tracks
HYDRAULIC SYSTEM
HYDRAULIC/HYDROSTATIC SCHEMATICS35 topics
- BASIC OPERATING PRINCIPLE OF THE HYDRAULIC SYSTEM
- HYDRAULIC CONTROLS
- Clean Area
- Air Leaks
- Tubelines, Hoses, Fittings
- Straight Thread O-Ring Connections
- 37° Flare Connections
- Tubelines And Hoses
- Pipe Thread Connections
- TROUBLESHOOTING
- HYDRAULIC FILTER SERVICE
- HYDRAULIC TESTING
- To Check Volume Control Relief Valve
- To Check Lift Circuit Relief Valve
- HYDRAULIC PUMP
- Hydraulic Pump Testing
- Hydraulic Pump Removal
- Disassembly Of Hydraulic Pump
- Assembly Of Hydraulic Pump
- Installation Of Hydraulic Pump
- Removal Of The Hydraulic Pump (Tyrone)
- Disassembly Of The hydraulic Pump (Tyrone)
- Inspection Of The Hydraulic Pump (Tyrone)
- Replacement Of The Shaft Seal (Tyrone)
- Assembly Of The Hydraulic Pump (Tyrone)
- Installing The Hydraulic Pump (Tyrone)
- REMOVAL OF CONTROL VALVE
- Disassembly Of Control Valve
- CONTROL VALVE SERVICE
- Control Valve Seal Replacement
- Self Leveling Section Service
- CHECK HYDRAULIC LIFT AND TILT CYLINDERS
- INSPECTION OF HYDRAULIC CYLINDER
- LIFT CYLINDER SERVICE
- TILT CYLINDER SERVICE
HYDROSTATIC SYSTEM
HYDROSTATIC OPERATING PRINCIPLE64 topics
- HYDROSTATIC CIRCUITRY
- ADJUSTMENT OF DIRECTIONAL CONTROL
- REMOVAL OF CONTROL ASSEMBLY
- ADJUSTMENT OF PUMP AND MOTOR CONTROL
- FLUID AND FILTERS
- Fluid
- Filters
- TRANSMISSION STARTING PROCEDURE
- HYDROSTATIC CHARGE PUMP
- Description
- To Check Charge Pressure
- Removal Of Charge Pump
- Installation Of Charge Pump
- DISPLACEMENT CONTROL VALVE
- Removing Displacement Control Valve
- Installing Displacement Control Valve
- Adjustment Of Displacement Control Valve
- REMOVAL OF CHECK VALVE
- To Test Check Valves
- Installation Of Check Valve
- REMOVAL OF HYDROSTATIC PUMP OR HYDROSTATIC MOTOR
- Disassembly Of Pump Or Motor
- Removal Of Seal
- Installation Of Seal
- Removal Of End cap
- Removal Of Valve Plate
- Removal Of Brass Bearing Plate
- Removal Of Rear Bearing
- Removal Of Spring Guide
- Removal Of Cylinder Block
- Removal Of Slipper Retainer Guide
- Removal Of Pistons And Slipper Retainer
- Removal Of Thrust Plate
- Removal Of Front Cover
- Removal Of Drive Shaft
- Removal Of Swashplate And Trunnion
- Removal Of Servo Pistons And Sleeves
- Assembly Procedure
- Adjustment Of Drive Shaft End Play
- Assembly Of Servo Pistons
- Installation Of Servo Pistons
- Control Link Connections
- Installation Of Servo Sleeves
- Installing Swashplate And Trunnions
- Adjustment Of Neutral Position Of Swashplate
- Installation Of thrust Plate
- Installation Of Drive Shaft
- Installation Of Front Cover And Gasket
- Assembly Of Cylinder Block
- Installation Of the Cylinder Block Assembly
- Installation Of Spring Guide
- Installation Of Rear Bearing Cone
- Installation Of Bearing Plate
- To Place Valve Plate On End Cap
- Installation Of End Cap
- Installation Of Motor
- MANIFOLD BLOCK
- Motor Manifold Block
- Removal Of Manifold Bloclk
- Installation Of Manifold Block
- Cleaning
- Removal Of Oil Cooler
- Installation Of Oil Cooler
- Oil Cooler Bypass Valve
MECHANICAL DRIVE SYSTEM
GENERAL INFORMATION33 topics
- CLUTCH SERVICE
- Adjustment Of Clutch
- Clutch Removal
- Inspection Of Clutch
- Assembly Of Clutch
- TRANSFER CHAINCASE SERVICE
- Removal Of Transfer Chaincase
- Disassembly Of Transfer Chaincase
- Inspection Of Transfer Chaincase
- To Assemble And Install Transfer Chaincase
- New Transfer Case
- REDUCTION GEARCASE DESCRIPTION
- Removal Of Reduction Gearcase
- Disassembly And Assembly Of The Reduction Gearcase
- Installation Of The Reduction Gearcase
- ADJUSTMENT OF FINAL DRIVE CHAIN
- To Check Final Drive Chain
- Removal Of Drive Chain
- AXLES
- Removal Of Axle Housing
- Disassembly Of Axle Housing
- To Check Axle And Sprocket Splines
- Installation Of Axle Housing
- Assembly Of Axle And Housing
- INSTALLATION OF FINAL DRIVE CHAIN
- FINAL DRIVE CHAIN (With Pivot Bolt)
- Removal Of The Idler
- Disassembly Of Idler
- Assembly And Installation Of Idler
- FINAL DRIVE IDLER (With Floating Pivot Pin)
- To Remove The Idler Assembly
- Disassembly Of Idler
- Assembly And Installation Of Idler
MAIN FRAME
ROPS (Operator Enclosure)9 topics
- ROPS TILT CONTROL SERVICE
- Removal Of Tilt Control Pump
- Disassembly Of Tilt Control Motor
- REMOVAL AND INSTALLATION OF ROPS
- LIFT ARMS
- Removal Of Lift Arms
- Installation Of Lift Arms
- REPLACEMENT OF LIFT ARM PIVOT PIN
- REPLACEMENT OF LIFT ARM PIVOT BUSHING
ELECTRICAL SYSTEM
ELECTRICAL SCHEMATICS22 topics
- INSTALLATION OF BATTERY
- WIRING HARNESS
- ELECTRICAL CIRCUITRY
- Wiring Harness (974)
- Wiring Harness (975)
- PROBLEM ANALYSIS CHARTS
- TO CHECK WIRING
- TO CHECK GENERATOR OUTPUT
- GENERATOR SERVICE
- Removal Of Generator
- Disassembly Of Generator
- Inspection Of Generator
- STARTER SERVICE
- Checking The Starter
- Removal Of The Starter
- Disassembly And Inspection Of Starter
- Assembly Of The Starter
- SERVICING THE NIPPONDENSO STARTER
- Checking The Starter
- Disassembly Of The Starter
- Inspecting The Starter
- Assembly Of The Starter
ENGINE SERVICE (974 - PERKINS)
REMOVAL OF ENGINE110 topics
- INTRODUCTION TO ENGINE REPAIR
- UNIFIED THREADS
- ENGINE NUMBER
- ENGINE DESCRIPTION
- LUBRICATING OIL PAN
- CRANKCASE VENTILATION
- Breather Assembly
- CYLINDER HEAD
- Checking Compression
- Removal Of The Cylinder Head
- Removal Of Valves
- To Clean Cylinder Head And Block
- Valve Guides
- Valves And Valve Seats
- Grinding Valves By Hand
- Valve Seat Inserts (Exhaust Valve)
- Machining Of Cylinder Head
- Valve Springs
- Assembly Of Rocker Shaft
- Push Rods
- Valve Stem Oil Seals
- Assembly Of Cylinder Head
- Cylinder Head Gasket
- Installation Of Cylinder Head
- REMOVAL OF PISTONS AND CONNECTING RODS
- Removal Of Pistons And Rings From Connecting Rods
- Assembly Of Pistons To Connecting Rods
- Installation Of Pistons And Connecting Rods In Cylinder Bore
- Installation Of New Pistons
- CYLINDER LINERS
- Removal of Cylinder Liners (Cast Iron)
- Installation Of Cylinder Liners
- CRANKSHAFT AND MAIN BEARINGS
- Removal Of Main Bearings And Thrust Washers
- Installation Of Main Bearings And Thrust Washers
- REMOVAL OF CRANKSHAFT
- Regrinding Crankshaft
- Installation Of Crankshaft
- CRANKSHAFT REAR OIL SEAL
- BALANCE UNIT
- Removal Of Balance Unit
- Disassembly Of Balance Unit
- Assembly Of Balance Unit
- BALANCER UNIT (CENTER MOUNTED)
- Removal And Installation
- Engine Timing to Balancer Unit
- Oil Pump Removal And Installation
- Oil Pump Inspection
- Oil Pump Relief Valve
- Disassembly And Assembly
- Inspection
- CRANKSHAFT FRONT OIL SEAL
- REMOVAL OF TIMING CASE COVER
- Installation Of Timing Case Cover
- To Check Timing Gear Play
- Removal Of Idler Gear And Hub
- Installation Of Idler Gear And Hub
- Removal Of Camshaft Gear
- Installation Of Camshaft Gear
- Removal Of Fuel Pump Gear
- Installation Of Fuel Pump Gear
- Removal Of Timing Case
- Installation Of Timing Case
- REMOVAL OF CAMSHAFT AND TAPPETS
- Installation Of Camshaft And Tappets
- TO CHECK VALVE TIMING
- LUBRICATION SYSTEM
- Engine Lubrication System
- COOLING SYSTEM
- Removal And Installation Of Water Pump
- Disassembly Of Water Pump
- Inspection Of Water Pump
- Assembly Of Water Pump
- Removal Of Thermostat
- To Test Thermostat
- FUEL SYSTEM
- To Test Fuel Lift Pump
- To Clean Fuel Lift Pump
- Removal Of Fuel Lift Pump
- Removal Of Fuel Injection Pump
- Installation Of Fuel Injection Pump
- Fuel Injection Pump Gear
- Maximum Speed Setting
- Adjustment Of Idling Speed
- To Charge Fuel System
- HOW THE THERMOSTART UNIT WORKS
- ENGINE STARTING PROCEDURE
- HOW TO USE THE THERMOSTART
- CHARGING THE FUEL LINE
- FUEL INJECTORS
- Fuel Injector Problems
- To Check And Make Adjustments Of Injectors
- To Check For Injector Failure
- To Test Injectors (Visual Inspection)
- To Test Injectors (Using Testing Equipment)
- REMOVAL OF FLYWHEEL
- Removal And Installation Of Flywheel Ring Gear
- Installation Of Flywheel
- REMOVAL OF FLYWHEEL HOUSING
- Installation Of Flywheel Housing
- Installation Of New Housing
- Installation Of Old Housing (That Was Removed From Engine)
- FUEL TIMING INJECTION PUMP
- To Remove The Fuel Injection Pump
- To Install The Fuel Injection Pump
- Checking Fuel Injection Pump Timing
- Timing The Fuel Injection Pump (Using Tming Tool MS 67123)
- Checking The Timing Mark On The flange Of The Injection Pump
- SMOKE DIAGNOSIS CHART
- TROUBLESHOOTING THE PERKINS ENGINE
ENGINE SERVICE (975 - JOHN DEERE)67 topics
- PRELIMINARY ENGINE TESTING
- ENGINE TUNE-UP
- TUNE-UP PROCEDURE
- DETAILED TUNE-UP PROCEDURES
- Air Cleaner
- Exhaust System
- Crankcase Vent Tube
- Compression Test
- CYLINDER HEAD, VALVES, CAMSHAFT AND TIMING GEAR TRAIN
- VALVE TRAIN
- To Check Valve Clearance
- To Check Valve Lift
- CYLINDER HEAD AND VALVES
- To Remove Cylinder Head
- Valve Springs
- Valve Face And Stem
- Valve Rotattors
- Valve Guides
- Valve Seats
- Cylinder Head
- Rocker Arm
- Assembly Of Rocker Arm
- INSTALLATION OF CYLINDER HEAD
- Torques For Hardware
- ADJUSTMENT OF VALVE CLEARANCE
- CAMSHAFT
- Removal Of Camshaft
- Inspection And Repair Of Camshaft
- Installation Of Camshaft
- To Check Gear Timing
- TIMING GEAR TRAIN
- To Remove Timing Gear
- Inspection And Repair
- BALANCER SHAFTS
- Inspection Of Balancer Shaft
- Front Plate And Timing Gear Cover
- Assembly And Installation
- CYLINDER BLOCK, LINERS, PISTONS AND RODS
- Removal Of Piston
- Inspection Of Pistons And Rings
- Inspection Of Piston Pin
- Inspection Od Connecting Rod
- Assembly Of Piston And Rod
- Cylinder Liners
- Measurements
- Installation Of Pistons And Rods
- CRANKSHAFT, MAIN BEARINGS AND FLYWHEEL
- To Check End Play Of Crankshaft
- Removal Of Crankshaft
- Inspection And Repair Of Crankshaft
- Crankshaft And Flywheel
- Assembly Of Crankshaft
- Oil Pump
- Repair Of Oil Pump
- Engine Oil Cooler
- Repair Of Engine Oil Cooler
- Engine Oil And Filter
- Installation Of Engine Oil Cooler
- To Check Radiator And Fan Belt
- Repair Of Water Pump
- Removal Of Water Pump
- Repair Of Water Manifold And Thermostat
- Fuel Injection Pump
- Removal Of Injection Pump
- Fuel Injection Nozzles
- Diagnosising Malfunctions
- SPECIAL TOOLS
TECHNICAL DATA
LOADER SPECIFICATIONS89 topics
- Operational & Performance
- Engine
- Loader Hydraulics
- Electrical
- Drive System
- Capacities
- Tires
- TECHNICAL DATA (PERKINS ENGINE)
- Recommended Torques
- De-Rating For Altitude
- Service Wear Limits
- MANUFACTURING DATA AND DIMENSIONS
- Cylinder Block
- Cylinder Liner (Cast Iron)
- Pistons
- Piston Rings
- Piston Pin
- Connecting Rod
- Connecting Rod Alignment
- Crankshaft
- Main Bearings
- Connecting Rod Bearings
- Camshaft
- Camshaft Thrust Washer
- Cylinder Head
- Valve Guides
- Exhaust Valves
- Inlet Valves
- Inner Valve Springs
- Outer Valve Springs
- Tappets
- Rocker Shaft
- Rocker Levers
- Valve Clearance
- Valve Timing
- TIMING GEARS
- Camshaft Gears
- Fuel Pump Gear (Mechanically Goverened Pumps)
- Idler Gear And Hub
- Crankshaft Gear
- Timing Gear Backlash
- Sump
- Oil Pump
- Relief Valve
- Lubricating Oil Filter
- Type Of Cooling System
- Thermostat
- Water Pump
- Balance Unit (Center Mounted)
- OIL PUMP (Center Mounted Balancer Unit)
- Oil Pump, Gear & Relief Valve
- Fuel Lift Pump
- Fuel Filter (Final)
- Fuel Injection Pump
- Static Timing Position
- Injectors
- PERKINS DIESEL SERVICE TOOLS
- LOADER SPECIFICATIONS
- Operational & Performance
- Engine
- Loader Hydraulics
- Electrical
- Drive System
- Capacities
- Tires
- TECHNICAL DATA (JOHN DEERE)
- Cylinder Head, Valves and Camshaft
- Cylinder Block, Liners, Pistons And Rods
- Crankshaft, Mian Bearings And Flywheel
- Lubrication System
- Cooling System
- Fuel System
- ENGINE BREAK-IN INSTRUCTIONS (After overhaul)
- LOADER TORQUE SPECIFICATIONS
- Transfer Chaincase & Clutch Housing
- Reduction Gearcase
- Axle Carrier
- Lift Arm
- DECIMAL AMD MILLIMETER EQUIVALENTS
- U.S. TO METRIC CONVERSION
- STANDERD TORQUE SPECIFICATIONS FOR BOLTS
- LOADER SPECIFICATIONS - 974
- Engine
- Machine
- Capacities
- LOADER SPECIFICATIONS - 975
- Engine
- Machine
- Capacities
ALPHABETICAL INDEX
SERVICE BULLETINS
SERVICE MANUAL REVISIONS
Inside this manual
Real pages from this service manual (320 pages). Open the sample pages (PDF, 183 KB)
- Foldout diagram (color), page 39
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This is a service manual
Here's how it compares to the other manual types.
This manual
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 320 pages
Quantity one is the manual described above.
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