Bobcat 943 Skid-Steer Loader Service Manual – 6570008 (4–86)

This workshop repair service manual PDF download for the 943 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 943

TABLE OF CONTENTS :

PREVENTIVE MAINTENANCE
HYDRAULIC SYSTEM
HYDROSTATIC DRIVE SYSTEM
DRIVE SYSTEM
MAIN FRAME
ELECTRICAL SYSTEM
ENGINE SERVICE
TECHNICAL DATA
ALPHABETICAL INDEX
SERVICE MANUAL REVISIONS

MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
P/N : 6570008 (4–86)
Total Pages : 370

This 943 Bobcat Loader 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
SERIAL NUMBER LOCATIONS
LOADER SERIAL NUMBER
ENGINE SERIAL NUMBER
DELIVERY REPORT
BOBCAT LOADER IDENTIFICATION

PREVENTIVE MAINTENANCE
SERVICE SCHEDULE
LIFTING AND BLOCKING THE BOBCAT LOADER
Procedure
TRANSPORTING THE BOBCAT LOADER
Procedure
TOW VALVES
Procedure
LIFT ARM SUPPORT DEVICE
Installing The Lift Arm Support Device
OPERATOR CAB
Raising The Operator Cab
Lowering The Operator Cab
Operator Cab Air Seals (S/N 11999 & Below)
Cleaning Rear Window, Optional Front Door And Enclosure
SEAT BAR SYSTEM
Description
Inspection Of The Seat Bar System
Servicing The Seat Bar System
REAR DOOR
Opening Rear Door
Adjusting The Door Latch
REAR GRILL
Opening The Rear Grill
AIR CLEANER
Replacement Of The Air Cleaner Element
FUEL SYSTEM
Filling The Fuel Tank
Removing Water From The Fuel Filter
ENGINE OIL AND FILTER
Replacement Of Engine Oil And Filter
COOLING SYSTEM
Checking Coolant Level
Removing The Coolant From The Cooling System
ELECTRICAL SYSTEM
Description
Using An Extra Battery (Jump Start)
Electrical System Maintenance
COLD TEMPERATURE STARTING
Starting Procedure
HYDRAULIC AND HYDROSTATIC SYSTEM
Checking And Adding Fluid
Replacing The Hydraulic/Hydrostatic Filters
SPARK ARRESTOR MUFFLER
Cleaning The Spark Arrestor Muffler
Cleaning Exhaust Purifier
FINAL DRIVE CHAINCASE
TIRE INSPECTION AND ROTATION
Procedure
Tire Pressure
Wheel Nuts
LOADER LUBRICATION
Lubricating The Loader
PIVOT PINS
Checking Pivot Pin Retainer Bolts
STEERING CONTROL LIMITER
Lubricating The Steering Control Limiter
REMOTE START SWITCH
Procedure

HYDRAULIC SYSTEM
HYDRAULIC / HYDROSTATIC SCHEMATICS
TROUBLESHOOTING
HYDRAULIC SYSTEM INFORMATION
Flare Connections
O–ring Face Seal Connection
Straight Thread O–ring Fitting
Tubelines And Hoses
LIFT CYLINDER
Checking The Lift Cylinder(s)
Removal And Installation
Installation
TILT CYLINDER
Checking The Tilt Cylinder(s)
Removal And Installation
Tilt Cylinder Base End Pivot Pin
HYDRAULIC CYLINDER REPAIR
Disassembly
Assembly
Base And Rod End Seals
JUNCTION PORT BLOCK
Removal And Installation
QUICK COUPLERS (BRUNING)
Disassembly And Assembly
HYDRAULIC CONTROL VALVE
Removal And Installation
Disassembly And Assembly
Valve Spool Linkage End O–ring (All Valve Sections) Disassembly And Assembly
Lift Section Detent And Spool
Front Auxiliary Detent
Tilt And Rear Auxiliary Centering Spring
Anti–Cavitation Valve
Port Relief
CHARGE PUMP
Removal And Installation
Disassembly And Assembly
PRE–CHARGE PORT BLOCK (S/N 11999 & Below)
Removal And Installation
Disassembly And Assembly
HYDRAULIC PUMP
Removal And Installation
Disassembly And Assembly
Inspection
FAN PORT BLOCK (S/N 11999 & Below)
Removal And Installation
Disassembly And Assembly
FAN MOTOR (S/N 11999 & Below)
Removal And Installation
Disassembly And Assembly
Inspection
BUCKET POSITION VALVE (S/N 11999 & Below)
Removal And Installation
Disassembly And Assembly
HYDRAULIC RESERVOIR
Removing Fluid From The Reservoir
Removal And Installation
HYDRAULIC FILTER
Removal And Installation
Disassembly And Assembly
PORT BLOCK (S/N 12001 & Above)
Removal And Installation
Disassembly And Assembly
BUCKET POSITION VALVE (S/N 12001 & Above)
Removal And Installation
Disassembly And Assembly
FAN MOTOR (S/N 12001 & Above)
Removal And Installation
Disassembly And Assembly

HYDROSTATIC SYSTEM
TROUBLESHOOTING
CONTROL CENTER (S/N 11999 & Below)
Removal And Installation
LIFT AND TILT PEDALS
Removal And Installation
Pedal Cable Control Linkage
Pedal Lock Linkage
Adjustment
STEERING LEVERS AND SHAFT (S/N 11999 & Below)
Removal And Installation
HYDROSTATIC MOTOR
Removal And Installation
Disassembly And Assembly
Inspection
HYDROSTATIC PUMP
High Pressure And Replenishing Valves
Checking The High Pressure Relief Replenishing Valve
Checking Charge Relief Pressure
Removal And Installation
Installation
Disassembly And Assembly
Inspection
Tow Valves
Removal And Installation
Neutral Adjustment
HYDROSTATIC FILTER
Removal And Installation
Disassembly And Assembly
DRIVE BELT
Removal And Installation
DRIVE BELT TENSION PULLEY
Removal And Installation
CONTROL CENTER (S/N 12001 & Above)
Removal And Installation
STEERING LEVERS AND SHAFT (S/N 12001 & Above)
Removal And Installation

DRIVE SYSTEM
PARKING BRAKE
Adjustment
Removal And Installation
Block And Pucks
AXLE SEAL AND WEAR RING
Removal And Installation
FRONT AXLE AND SPROCKET
Removal
Installation
REAR AXLE, SPROCKET AND DRIVE CHAIN
Removal
Installation
DRIVE CHAINS
Front Drive Chain Removal And Installation
Rear Drive Chains
REDUCTION GEARCASE
Removal And Installation
Disassembly And Assembly
CHAINCASE FLUID
Removal

MAIN FRAME
OPERATOR CAB
Removal And Installation
OPERATOR CAB GAS CYLINDER
Removal And Installation
SEAT BAR (Without Gas Spring)
Removal And Installation
Seat Bar Inspection
Seat Bar System
Seat Bar Maintenance
SEAT BAR (With Gas Spring)
Removal And Installation
REAR GRILL GAS CYLINDER
Removal And Installation
REAR DOOR
Removal And Installation
LIFT ARMS
Removal And Installation
BOB–TACH
Removal And Installation
Bob–Tach Wedges (S/N 11503 & Below)
Bob–Tach Lever (S/N 11503 & Below)
Bob–Tach Wedge and Lever (Starting with S/N 11504)
FUEL TANKS
Fuel Tank Left Side Removal And Installation
Fuel Tank Right Side Removal And Installation
Fuel Tank Pick Up Hose
MAIN FRAME
Main Frame Bolts

ELECTRICAL SYSTEM
ELECTRCAL SCHEMATICS
DESCRIPTION
TROUBLESHOOTING
SEALED ELECTRICAL TERMINAL
Removal And Installation
BATTERY
Checking The Batteries
Removal And Installation
DELCO ALTERNATOR
Alternator Belt Adjustment
Checking Alternator Wiring Harness
Checking Alternator Output
Checking Alternator Regulator
Removal And Installation
Disassembly And Assembly
Assembly
MELROE ALTERNATOR
Checking The Alternator Output
Checking The Alternator Regulator
Removal And Installation
Disassembly And Assembly
STARTER
Checking The Starter
Removal And Installation
Disassembly And Assembly
Cleaning And Inspection
Replacing The Brushes
OPERATOR CAB HARNESS
Removal And Installation
CHASSIS HARNESS
Removal And Installation
ENGINE HARNESS
Removal And Installation

ENGINE SERVICE
TROUBLESHOOTING
VALVE CLEARANCE
Adjustment
ENGINE COMPRESSION
Checking
FUEL FILTER
Removal And Installation
FUEL LIFT PUMP
Checking
Removal And Installation
REMOVING AIR FROM FUEL SYSTEM
Procedure
FUEL INJECTION PUMP
Removal And Installation
ENGINE TIMING TO INJECTION PUMP
Procedure
CHECKING TIMING MARK ON INJECTION PUMP FLANGE
Procedure
FUEL INJECTOR NOZZLES
Removal And Installation
ENGINE
Removal And Installation
RADIATOR AND OIL COOLER
Removal And Installation
ENGINE MUFFLER
Removal And Installation
EXHAUST GAS PURIFIER (Optional)
Function
Cleaning The Exhaust Gas Purifier
ENGINE MOUNTS
Removal And Installation
ENGINE FLYWHEEL
Removal And Installation
Flywheel Ring Gear
CYLINDER HEAD
Removing The Cylinder Head
Cylinder Head Surface Alignment
Installing The Cylinder Head
VALVES
Removal Of The Valves
Installing The Valves
Reconditioning The Valves And Valve Seats
Installing Valve Guides
Install The Valve Seats
Checking The Valve Springs
ROCKER ARMS
Disassembly
Assembly
PISTON AND CONNECTING RODS
Removal
Disassembly
Inspection
Installation
CYLINDER LINERS
Removal
Installation
MAIN BEARINGS
Removal
Installation
Crankshaft End Play
CRANKSHAFT
Removal
Checking
Installation
REAR MAIN OIL SEAL
Removal And Installation
TIMING CASE COVER
Removal And Installation
IDLER GEAR AND HUB
Removal And Installation
CAMSHAFT GEAR
Removal And Installation
FUEL INJECTION PUMP GEAR
Removal And Installation
Installation
CRANKSHAFT GEAR
Removal
TIMING CASE
Removal And Installation
Installation
CAMSHAFT
Removal And Installation
Inspection
Installation
WATER PUMP
Disassembly Of Water Pump
Inspection Of The Water Pump
Assembly Of The Water Pump
LUBRICATION SYSTEM
Description
BALANCER UNIT
Removal And Installation
Engine Timing To Balancer Unit
Oil Pump Removal And Installation
Oil Pump Inspection
Oil Pump Relief Valve
Disassembly And Assembly
Inspection

TECHNICAL DATA
LOADER SPECIFICATIONS (S/N 11999 & Below)
OPERATION & PERFORMANCE
ENGINE
HYDRAULIC SYSTEM
ELECTRICAL
DRIVE SYSTEM
CAPACITIES
TIRES
LOADER SPECIFICATIONS (S/N 12001 & Above)
OPERATION & PERFORMANCE
ENGINE
HYDRAULIC SYSTEM
ELECTRICAL
DRIVE SYSTEM
CAPACITIES
TIRES
ENGINE SPECIFICATIONS
Cylinder Head
Valve Guides
Exhaust Valves
Intake Valves
Valve Springs
Rocker Arms & Tappets
Piston & Piston Rings
Connecting Rod, Piston Pin & Bushing
Cylinder Block & Liners
Crankshaft, Main, Connecting Rod Bearings & Thrust Washer
Camshaft & Thrust Washer
Timing Case & Timing Gears
Oil Pump, Gear & Relief Valve
Cooling System & Water Pump
Fuel Lift Pump, Injection Pump & Injectors
De–Rating For Altitude
Balance Unit (Center Mounted)
Crankshaft Regrind Data
Engine Torque
Service Wear Limits
HYDRAULIC/HYDROSTATIC FLUID SPECIFICATIONS
DECIMAL AND MILLIMETER EQUIVALENTS
U.S. TO METRIC CONVERSION
STANDARD TORQUE SPECIFICATIONS FOR BOLTS

SERVICE MANUAL REVISIONS
943–1
943–2
943–3
943–4
943–5
943–6
943–7
943–8
943–9
943–10
943–11
943–12
943–13
943–14
943–15
943–16
943–17

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