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Bobcat 873 Loader Service Manual (SN 514213001-514239999)

Format: PDF (Printable Document)

File Language: English

File Pages: 604

File Size: 26.88 MB (Speed Download Link)

Brand: Bobcat

Model: 873 Loader

Book No: 6900382

Serial No: SN 514213001-514239999

Type of Document: Service Manual

Categories: ,

$ 45

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Bobcat 873 Loader Service Manual (SN 514213001-514239999)

The Bobcat 873 is a mid-size skid-steer loader you'll see loading trucks, feeding mixers, or running augers and trenchers all week. The service manual is what I reach for around my shop when an 873 is down and I actually have to fix something, not just run it. If you're chasing a hydraulic issue, engine problem, or electrical gremlin on an 873 in the serial range listed, this is the book you want. It keeps you from guessing and throwing parts at it.

What this manual helps you do

  • Diagnose low power, overheating, or no-move complaints with step-by-step checks on the engine and hydrostatic drive
  • Trace and troubleshoot wiring and sensor issues using proper electrical diagrams for this 873 series
  • Check and set hydraulic and hydrostatic pressures using the right test ports and adjustment points
  • Follow teardown and reassembly procedures for cylinders, drive motors, pumps, and major mechanical components
  • Replace and adjust linkages, Bob-Tach parts, and controls so the loader runs straight and the attachment locks correctly

Who this is for

This manual is for anyone responsible for keeping an 873 running: small contractors, owner-operators, shop mechanics, and rental fleets. If you only need to know how to operate the machine or do basic daily checks, you want the operator's handbook instead, not this service manual.

FAQ

Q: Is this a searchable PDF and can I read the wiring diagrams clearly?

A: Yes, these manuals are usually scanned or native PDFs you can search, and the wiring diagrams are laid out so you can zoom in and follow circuits.

Q: Will this cover my exact 873?

A: If your serial number falls between 514213001 and 514239999, this is the correct service manual for your machine.

Q: Is this the right document if I'm doing real repairs, not just maintenance?

A: Yes, this is the workshop-level service manual, the one you use for diagnostics, teardown, and reassembly, not just fluid and filter changes.

Bottom line, if your 873's serial number is in that range and you're actually turning wrenches on it, this is the right manual. If it's not in that range, keep looking.

📘 Show Index

Table of Contents:

  • MAINTENANCE SAFETY
  • ALPHABETICAL INDEX
  • CONTENTS
    • FOREWORD
    • SAFETY INSTRUCTIONS
    • SERIAL NUMBER LOCATIONS
    • LOADER SERIAL NUMBER
    • ENGINE SERIAL NUMBER
    • DELIVERY REPORT
    • BOBCAT LOADER IDENTIFICATION
    • OPTIONS AND ACCESSORIES
  • PREVENTIVE MAINTENANCE
    • SERVICE SCHEDULE
    • LIFTING AND BLOCKING THE LOADER
      • Procedure
    • TRANSPORTING THE LOADER
      • Procedure
    • TOWING THE LOADER
      • Procedure
    • STOPPING THE BOBCAT LOADER
      • Procedure
    • LIFT ARM SUPPORT DEVICE
      • To Install The Lift Arm Support Device
      • To Remove The Lift Arm Support Device
    • OPERATOR CAB
      • Raising The Operator Cab
      • Lowering The Operator Cab
      • Emergency Exit
    • SEAT BAR RESTRAINT SYSTEM (FOOT PEDALS)
      • Seat Bar Inspection
      • Seat Bar Maintenance
    • SEAT BAR RESTRAINT SYSTEM (MECHANICAL HAND CONTROLS)
      • Seat Bar Inspection
      • Seat Bar Maintenance
    • SEAT BAR RESTRAINT SYSTEM (ADVANCED HAND CONTROLS)
      • Inspecting The Seat Bar
      • Maintaining The Seat Bar
    • AIR CLEANER SERVICE
      • Replacing Filter Element
    • FUEL SYSTEM
      • Fuel Specifications
      • Filling The Fuel Tank
      • Fuel Filter
      • Removing Air From The Fuel System
    • ENGINE LUBRICATION SYSTEM
      • Checking Engine Oil
      • Replacing Oil And Filter
    • ENGINE COOLING SYSTEM
      • Cleaning Cooling System
    • ALTERNATOR BELT
      • Adjusting The Alternator Belt
    • HYDRAULIC/HYDROSTATIC SYSTEM
      • Checking And Adding Fluid
      • Hydraulic/Hydrostatic Filter Replacement
      • Replacing Hydraulic Fluid
        • Later Model loaders
        • Early Model Loaders
    • TIRE MAINTENANCE
      • Wheel Nuts
      • Tire Rotation
      • Tire Mounting
    • FINAL DRIVE TRANSMISSION (CHAINCASE)
      • Checking And Adding Oil
    • FAN GEARBOX
      • Checking And Maintaining
    • LUBRICATING THE LOADER
      • Procedure
    • REMOTE START SWITCH
      • Procedure
  • HYDRAULIC SYSTEM
    • HYDRAULIC / HYDROSTATIC SCHEMATICS
    • GLOSSARY OF HYDRAULIC / HYDROSTATIC SYMBOLS
    • TROUBLESHOOTING
    • HYDRAULIC SYSTEM INFORMATION
      • Tighten Procedures
    • LIFT CYLINDER(S)
      • Checking The Lift Cylinder(s)
      • Removal And Installation
    • TILT CYLINDER(S)
      • Checking The Tilt Cylinder(s)
      • Removal And Installation
    • HYDRAULIC CYLINDER
      • Lift Cylinder Identification
      • Tilt Cylinder Identification
      • Disassembly
      • Assembly
    • MAIN RELIEF VALVE
      • Checking The Main Relief Valve With Auxiliaries
      • Checking The Main Relief Valve Without Auxiliaries
    • MAIN RELIEF VALVE (S/N 514122001 & Above; 514222001 & Above)
      • Removal and Installation
      • Adjustment
    • MAIN RELIEF VALVE (S/N 514119999 & Below; 514219999 & Below)
      • Adjustment
      • Removal And Installation
    • BICS™ VALVE ASSEMBLY (S/N 514122001 & Above; 514222001 & Above)
      • Lift Arm By–Pass Orifice
      • Check Valve
      • Lock Valve
      • BICS™ Valve Solenoid
      • Removal and Installation
    • HYDRAULIC CONTROL VALVE (S/N 514122001 & Above; 514222001 & Above)
      • Removal and Installation
      • Identification Chart
      • Disassembly and Assembly
      • Load Check Valve
      • Lift Base End Restrictor
      • Main Relief Valve
      • Port Relief Valve
      • Anti–Cavitation/Port Relief Valve
      • Rubber Boot
      • Lift Spool and Detent
      • Auxiliary Spool
      • Auxiliary Electric Solenoid
      • H Port – Auxiliary Section
      • Inspection
      • Spool Seal Installation
    • HYDRAULIC CONTROL VALVE (S/N 514119999 & Below; 514219999 & Below)
      • Removal And Installation
      • Identification Chart
      • Disassembly And Assembly
      • Load Check Valve
      • Main Relief Valve
      • Port Relief Valve
      • Anti–Cavitation Valve
      • Rubber Boot
      • Lift Spool And Detent
      • Tilt Spool And Centering Spring
      • Auxiliary Spool
      • Auxiliary Electric Solenoid
      • H Port – Auxiliary Section
      • Base End Restrictor
      • Inspection
      • Spool Seal Installation
    • HYDRAULIC PUMP (Double Gear)
      • Checking The Output Of The Pump
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Inspection
      • Assembly
    • HYDRAULIC PUMP (Single Gear)
      • Checking The Output Of The Pump
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Inspection
      • Assembly
    • HYDRAULIC FLUID RESERVOIR
      • Draining The Fluid Reservoir
      • Removal And Installation
      • Hydraulic Fluid Screen Removal And Installation
    • LIFT ARM BY–PASS CONTROL VALVE (S/N 514122001 & Above; 514222001 & Above)
      • Removal and Installation
      • Disassembly and Assembly
    • LIFT LOCK BY–PASS VALVE (S/N 514119999 &Below; 514219999 & Below)
      • Removal And Installation
      • Disassembly And Assembly
    • TILT LOCK VALVE (S/N 514119999 & Below; 514219999 & Below)
      • Removal And Installation
      • Disassembly And Assembly
    • HYDRAULIC/HYDROSTATIC FILTER HOUSING
      • Removal And Installation
    • HYDROSTATIC FILTER HOUSING
      • Removal And Installation
        • S/N 514122001 thru 514122813; 514222001 thru 514222027
        • S/N 514119999 & Below; 514219999 & Below
        • All S/N Loaders
        • S/N 514122001 thru 514122813; 514222001 thru 514222027
        • S/N 514119999 & Below; 514219999 & Below
    • HYDRAULIC/HYDROSTATIC FILTER HOUSING BRACKET
      • Removal And Installation
        • S/N 514122814 & Above; 514222028 & Above
        • S/N 514122001 thru 514122813; 514222001 thru 514222027
        • S/N 514119999 & Below; 514219999 & Below
        • All S/N Loaders
    • CONTROL PEDALS
      • Removal And Installation
      • Pedal Adjustment
    • PEDAL INTERLOCK LINKAGE
    • Removal And Installation
      • Adjustment
    • FRONT SIDE PANEL
      • Removal And Installation
    • REAR AUXILIARY DIVERTER
      • Disassembly
      • Inspection
      • Solenoid Testing
      • Assembly
  • HYDROSTATIC SYSTEM
    • TROUBLESHOOTING
    • HYDROSTATIC SYSTEM INFORMATION
      • Replenishing Valve Function
    • FRONT PANEL
      • Removal And Installation
    • STEERING LEVERS (514122814 & Above; 514222028 & Above)
      • Removal And Installation
      • Disassembly And Assembly
    • STEERING LINKAGE (S/N 514122814 & Above; 514222028 & Above)
      • Removal And Installation
      • Steering Linkage Adjustment
    • STEERING LEVERS (514122814 & Below; 514222028 & Below)
      • Removal And Installation
      • Disassembly And Assembly
    • STEERING LINKAGE (514122814 & Below; 514222028 & Below)
      • Removal And Installation
      • Steering Linkage Adjustment
    • HYDROSTATIC MOTOR (S/N 514122306 & Above; 514223902 & Above)
      • Removal And Installation
      • Parts Identification
      • Disassembly
      • Inspection
      • Assembly
    • HYDROSTATIC MOTOR (S/N 514122305 & Below; 514223901 & Below)
      • Removal and Installation
      • Parts Identification
      • Disassembly
      • Inspection
      • Assembly
    • MOTOR CARRIER
      • Removal and Installation
      • Parts Identification
      • Disassembly
      • Assembly
    • HYDROSTATIC PUMP
      • Removal And Installation
      • Parts Identification (Right Half)
      • Parts Identification (Left Half)
    • HYDROSTATIC PUMP (S/N 514122814 & Above; 514222028 & Above)
      • Replenishing/High Pressure Relief Valve
      • Charge Pressure Relief Valve
      • Hydraulic Pump Removal
      • Hydraulic Pump Separation
      • Charge Pump Disassembly
      • Disassembly
      • Assembly
    • HYDROSTATIC PUMP (S/N 514122813 & Below;514222027 & Below)
      • Replenishing/High Pressure Relief Valve
      • Parts Identification
      • Disassembly
      • Inspection
      • Assembly
    • DRIVE BELT SHIELD
      • Removal And Installation
    • DRIVE BELT
      • Adjusting The Drive Belt
      • Replacing The Drive Belt
    • DRIVE BELT TENSIONER PULLEY
      • Removal And Installation
      • Tension Spring
    • OIL COOLER
      • Removal And Installation
  • DRIVE SYSTEM
    • PARKING BRAKE PEDAL
      • Removal And Installation
      • Disassembly And Assembly
    • BRAKE DISC
      • Removal And Installation
    • FRONT CHAINCASE COVER
      • Removal and Installation
    • AXLE SEAL
      • Removal and Installation
        • Later Model Loaders
        • Early Model Loaders
    • AXLE, SPROCKET AND BEARINGS
      • Removal and Installation
        • Later Model Loaders
        • Early Model Loaders
        • All Model Loaders
    • DRIVE CHAIN
      • Removal And Installation
    • CHAINCASE FLUID
      • Removing The Fluid From The Chaincase
  • MAIN FRAME
    • SEAT BAR
      • Removal And Installation
      • Assembling Components
      • Compression Spring Disassembly And Assembly
    • OPERATOR CAB GAS CYLINDER
      • Removal And Installation
      • Disassembly And Assembly
    • OPERATOR CAB
      • Removal And Installation
    • OPERATOR SEAT
      • Removal And Installation
    • BOB–TACH
      • Removal And Installation
      • Bob–Tach Lever And Wedge
      • Pivot Pin Bushing And Seal Replacement
      • Bob–Tach Stop
    • LIFT ARM STABILIZER BAR (S/N 514122465 & Above; 514222015 & Above)
      • Removal And Installation
    • LIFT ARM STABILIZER BAR (S/N 514122464 & Below; 514222014 & Below)
      • Removal And Installation
    • LIFT ARM LINK
      • Removal And Installation
    • LIFT ARMS
      • Removal And Installation
    • REAR GRILL
      • Removal And Installation
    • REAR DOOR (ONE PIECE)
      • Removal And Installation
      • Door Latch and Catch Adjustment
    • REAR DOOR
      • Removal And Installation
      • Hood Removal And Installation
      • Bumper Removal And Installation
      • Door Latch Removal And Installation
      • Door Latch And Catch Adjustment
    • FUEL TANK
      • Removal And Installation
      • Fuel Level Sender
      • Inlet Screen
  • ELECTRICAL SYSTEM
    • ELECTRICAL SCHEMATICS
    • TROUBLESHOOTING
    • ELECTRICAL SYSTEM INFORMATION
      • Description
      • Fuse Location
    • BATTERY
      • Removal And Installation
      • Servicing the Electrical System
      • Using A Booster Battery (Jump Starting)
    • ALTERNATOR
      • Alternator Output 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
      • Removal And Installation
      • Parts Identification
      • Disassembly And Assembly
      • External Pinion
      • Inspection And Repair
      • Magnetic Switch Test
      • No Load Test
    • STANDARD INSTRUMENT PANEL
      • Removal And Installation
    • FRONT LIGHTS
      • Removal And Installation
    • RELAY SWITCHES
      • Location
  • ENGINE SERVICE
    • TROUBLESHOOTING
    • ENGINE SPEED CONTROL
      • Removal And Installation
      • Speed Control Cable
      • Speed Control Linkage
    • ENGINE MUFFLER
      • Removal And Installation
    • AIR CLEANER HOUSING
      • Removal And Installation
    • BLOWER HOUSING/FAN GEARBOX
      • Removal And Installation
    • FAN DRIVE TENSION PULLEY
      • Removal And Installation
    • BLOWER FAN
      • Removal And Installation
    • FAN GEARBOX
      • Parts Identification
      • Disassembly
      • Assembly
        • Long Housing
        • Short Housing
      • Checking Backlash
    • OIL COOLER
      • Removal And Installation
    • ENGINE/HYDROSTATIC PUMP ASSEMBLY
      • Removal And Installation
    • ENGINE MOUNTS
      • Replacement
    • ENGINE
      • Removal And Installation
    • FLYWHEEL
      • Removal And Installation
      • Flywheel Ring Gear
    • FLYWHEEL HOUSING
      • Removal And Installation
    • GLOW PLUG
      • Checking The Glow Plug
    • VALVE CLEARANCE
      • Adjustment
    • FUEL INJECTION PUMP
      • Description
      • Removal
      • Injection Pump Timing
      • Installation
    • FUEL INJECTOR
      • Removal And Installation
      • Checking
      • Disassembly
      • Assembly
    • TIMING BELT
      • Inspection
      • Removal
      • Installation
      • Belt Replacement In Loader
    • VALVE TIMING
      • Checking
    • DEUTZ ENGINE TOOLS
      • Identification Chart
    • RECONDITIONING THE ENGINE
      • Disassembly
      • Assembly
    • CYLINDER LINERS
      • Checking The Cylinder Liners
    • CAMSHAFT BEARINGS
      • Checking
      • Removal And Installation
    • CONTROL ROD GUIDE BUSHING
      • Removal
      • Installation
    • REAR COVER SEAL
      • Removal And Installation
    • CRANKSHAFT
      • Checking The Crankshaft
    • CONNECTING ROD
      • Checking The Connecting Rod
    • PISTON AND PISTON PIN
      • Checking The Piston
      • Checking Piston Pin
      • Installing Piston Rings
    • CYLINDER HEAD
      • Disassembly
      • Checking The Valves
      • Checking Valve Seats
      • Valve Spring
      • Assembly
    • ROCKER ARM AND BRACKET
      • Checking
    • FRONT COVER
      • Disassembly
      • Assembly
    • TURBOCHARGER
      • Removal And Installation
      • Disassembly
      • Inspection
      • Assembly
    • POSITIVE CRANKCASE VENTILATION SYSTEM (S/N 514115365 & Below; 514213009 & Below)
      • Description
      • Inspection
      • Module Removal And Installation
    • CRANKSHAFT GEAR MOUNTING BOLT
      • Torque Procedure
  • SYSTEMS ANALYSIS
    • BOBCAT INTERLOCK CONTROL SYSTEM (BICS™)
      • (S/N 514123810 & Above; 514222300 & Above)
        • Inspecting The BICS™ Controller (Engine STOPPED– Key ON)
        • 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
        • Troubleshooting Chart
      • (S/N 514123809 & Below; 514222299 & Below)
        • Inspecting The BICS™ System Controller (Engine STOPPED – Key ON)
        • Inspecting Deactivation Of The Auxiliary Hydraulics System (Engine STOPPED – Key ON)
        • Inspecting The Seat And Seat Bar Sensors (Engine RUNNING)
        • Inspecting The Traction Lock (Engine RUNNING)
        • Inspecting The Lift Arm By–Pass Control
        • Maintenance
        • Troubleshooting Chart
      • TROUBLESHOOTING GUIDE
        • BICS SYSTEM CONTROLLER
        • TRACTION LOCK
        • SEAT SENSOR
        • SEAT BAR SENSOR
    • SEAT SENSOR
      • Seat Sensor Test
      • Removal And Installation
      • BICS™ Controller Seat Sensor Circuit Test
      • BICS™ SYSTEM CONTROLLER
      • Removal And Installation
    • SEAT BAR SENSOR
      • Seat Bar Sensor Test
      • Removal And Installation
      • BICS™ Controller Seat Bar Sensor Circuit Test
    • TRACTION LOCK
      • Removal And Installation
    • BOSS® DIAGNOSTIC TOOL
      • Procedure
    • SENDER AND SENSOR
      • Service Checks
      • Components
    • RPM SENSOR
      • Adjustment
    • MONITOR SERVICE CODES
    • TROUBLESHOOTING THE BOSS® & LCD DISPLAY
    • OPERATION SENSING SYSTEM UNIT
    • Removal and Installation
    • BOSS® INSTRUMENT PANEL
      • Removal And Installation
    • PWM MODULE
      • Description
    • PWM TROUBLESHOOTING
      • Conditions
      • Chart
    • PWM CONTROL HANDLE
      • Handle Testing
    • PWM ELECTRIC SOLENOID
      • Solenoid Coil Testing
    • TRACTION LOCK CONTROL SYSTEM
      • (S/N 514123810 & Above; 514222300 & Above)
        • Inspecting The Traction Lock Control System
        • Maintenance
      • (S/N 514123809 & Below; 514222299 & Below)
        • Description
        • Inspection
        • Maintenance
    • ELECTRICAL/HYDRAULIC CONTROLS REFERENCE
      • Controls Identification Chart
  • SPECIFICATIONS
    • LOADER SPECIFICATIONS
      • Performance
      • Controls
      • Engine
      • Hydraulic System
      • Electrical
      • Drive System
      • Capacities
      • Tires
    • ENGINE SPECIFICATIONS (BF4M1011)
      • General
      • Fuel System
      • Valve and Valve Guide and Seat Insert
      • Piston and Rings
      • Connecting Rod
      • Cylinder Head and Block
      • Crankshaft and Main Bearings
      • Camshaft and Bearings
      • Oil Pump
    • ENGINE SPECIFICATIONS (BF4M1011F)
      • General
      • Fuel System
      • Valve and Valve Guide and Seat Insert
      • Piston and Rings
      • Connecting Rod
      • Crankshaft and Main Bearings
      • Camshaft and Bearings
      • Oil Pump
    • ENGINE TORQUE
    • TORQUE SPECIFICATIONS FOR LOADER
    • 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/HYDROSTATIC FLUID SPECIFICATIONS
    • DECIMAL AND MILLIMETER EQUIVALENTS
    • U.S. TO METRIC CONVERSION
  • ADVANCE HAND CONTROL SYSTEM (A.H.C)
    • ADVANCED HAND CONTROL ELECTRICAL SCHEMATICS
    • A.H.C. COMPONENTS
      • Identification
    • TROUBLESHOOTING (A.H.C.)
      • Chart
    • ACTUATOR VOLTAGE TEST
      • Procedure
    • HANDLE CONTROL UNIT TEST
      • Procedure
    • BOBCAT INTERLOCK CONTROL SYSTEM (BICS™)
      • Troubleshooting Chart
    • SEAT SENSOR OVERRIDE ONLY
    • ADVANCED HAND CONTROLS (AHC)
    • A.H.C./PWM CONTROLLER
      • Removal and Installation
      • Description
      • Conditions
      • Troubleshooting Chart
      • Handle Testing
      • Solenoid Coil Testing
    • HANDLE CONTROL UNIT
      • Removal And Installation
      • Control Unit Connector
    • SWITCH HANDLE
      • Removal And Installation
    • A. H. C. HANDLE
      • Removal And Installation
      • Disassembly And Assembly
    • A.H.C. STEERING LEVER
      • Removal And Installation
      • Steering Lever Boot
    • ACTUATORS
      • Removal And Installation
      • Disassembly And Assembly
      • Mounting Plate
    • BICS™ VALVE
      • Lift Arm By–Pass Orifice
      • Check Valve
      • Lock Valve
      • BICS™ Valve Solenoid
      • Removal And Installation
    • HYDRAULIC CONTROL VALVE
      • Removal And Installation
      • Identification Chart
      • Disassembly And Assembly
      • Load Check Valve
      • Lift Base End Restrictor
      • Main Relief Valve
      • Port Relief Valve (Lift)
      • Anti–Cavitation/Port Relief Valve
      • Port Relief Valve (Tilt)
      • Anti–Cavitation Valve
      • Rubber Boot
      • Lift And Tilt Spool
      • Inspection
      • Auxiliary Spool
      • Auxiliary Electrical Solenoid
      • Spool Seal Installation
      • H–Port Auxiliary Section
  • SERVICE MANUAL REVISIONS
    • 873–001
    • 873–002
    • 873–003
    • 873–004
    • 873-005
    • 873-006

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