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Bobcat 853 Loader Service Manual (SN 510125001-510199999)

Format: PDF (Printable Document)

File Language: English

File Pages: 398

File Size: 10.41 MB (Speed Download Link)

Brand: Bobcat

Model: 853 Loader

Book No: 6720755

Serial No: SN 510125001-510199999

Type of Document: Service Manual

Categories: ,

$ 45

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Bobcat 853 Loader Service Manual (SN 510125001-510199999)

The Bobcat 853 is an older skid-steer-class loader that still earns its keep on small jobsites, farms, and in rental yards. When one shows up in my truck route, the service manual is what I grab when a quick guess won't cut it. Owners and techs reach for this manual when they're chasing weird hydraulic issues, engine problems, or electrical gremlins and need the exact factory procedure, not guesses from a forum.

What this manual helps you do

  • Trace and diagnose hydraulic problems in the loader and drive system with factory test points and specs in front of you
  • Check and verify hydrostatic charge and case drain conditions before you start throwing expensive parts at it
  • Follow step-by-step teardown and reassembly of major components like drive motors, cylinders, and the Bob-Tach linkage in tight shop or yard space
  • Diagnose electrical and starting issues using wiring diagrams and connector callouts instead of poking around blind
  • Adjust and set linkages, control levers, and safety interlocks after repairs so the machine actually runs and locks out like it should

Who this is for

This manual is for anyone working on a Bobcat 853 loader in the serial range 510125001 to 510199999: small contractors, owner-operators, rental fleets, and shop or mobile techs. If you just want to learn how to run the machine or daily service points, you want the operator's handbook instead, not this.

FAQ

Q: Is this a searchable PDF, and can I read the wiring diagrams on a laptop or tablet?

A: These manuals are usually standard PDF files, so you can search text and zoom in on wiring diagrams without losing detail.

Q: How do I know if it matches my exact machine?

A: Check your loader's serial number plate. If it falls between 510125001 and 510199999, this is the right manual family.

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

A: Yes. This is the workshop service manual, meant for diagnostics and repair, not just fluid changes.

Bottom line: If your 853's serial number is in that range and you're actually wrenching on it, this is the manual you want in the truck or on the bench.

📘 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
  • PREVENTIVE MAINTENANCE
    • SERVICE SCHEDULE
    • LIFTING AND BLOCKING THE LOADER
      • Procedure
    • TRANSPORTING THE LOADER
      • Procedure
    • TOWING THE LOADER
      • Procedure
    • LIFTING THE LOADER
      • Four Point Lift
      • Single Point Lift
    • LIFT ARM SUPPORT DEVICE
      • Engaging The Lift Arm Support Device
      • Disengaging The Lift Arm Support Device
    • OPERATOR CAB
      • Description
      • Raising The Operator Cab
      • Lowering The Operator Cab
      • Emergency Exit
    • SEAT BAR RESTRAINT SYSTEM
      • Description
      • 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
      • Checking The Coolant Level
      • Cleaning The Cooling System
      • Replacing The Coolant
    • ALTERNATOR BELT
      • Adjusting The Alternator Belt
    • HYDRAULIC/HYDROSTATIC SYSTEM
      • Checking And Adding Fluid
      • Replacing Hydraulic/Hydrostatic Filters
      • Replacing The Hydraulic Fluid
      • Hydraulic Reservoir Breather Cap
    • SPARK ARRESTOR MUFFLER
      • Cleaning Procedure
    • 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
    • TROUBLESHOOTING
    • HYDRAULIC SYSTEM INFORMATION
      • Tighten Procedures
    • LIFT CYLINDER(S)
      • Checking The Lift Cylinder
      • Removal And Installation
    • TILT CYLINDER
      • Checking The Tilt Cylinder
        • Rod End Seal
        • HYDRAULIC CYLINDER
        • Lift Cylinder Identification
        • Tilt Cylinder Identification
        • Disassembly
        • Assembly
    • MAIN RELIEF VALVE
      • Checking The Main Relief Valve
      • Checking The Main Relief Valve Without Auxiliaries
      • Removal And Installation
    • DUAL PRESSURE MAIN RELIEF VALVE (S/N 512811001 & Above) W/ Select Valve (JEM)
      • Checking The Low Setting
      • Checking The High Setting
      • Adjusting The Low Setting
      • Adjusting The High Setting
    • HYDRAULIC CONTROL VALVE
      • Removal And Installation
    • SELECT VALVE (S/N 512811001 & Above) W/SelectValve (JEM)
      • Checking The Relief Valve
      • Removal And Installation
      • Disassembly And Assembly
      • Solenoid Testing
    • HYDRAULIC FILTER HOUSING
      • Removal And Installation
    • HYDRAULIC PUMP
      • Checking The Output Of The Pump
      • Removal And Installation
    • HYDRAULIC FLUID RESERVOIR
      • Removal And Installation
    • LOCK VALVE (S/N 5103)
      • Removal And Installation
    • BUCKET POSITION VALVE (S/N 5102) & (S/N 5103)
      • Removal And Installation
    • FRONT AUXILIARY CONTROL VALVE (Apitech)
      • Removal And Installation
    • CONTROL PEDALS
      • Removal And Installation
      • Pedal Adjustment
    • PEDAL INTERLOCK LINKAGE
      • Removal And Installation
      • Pedal Interlock Linkage Adjustment
  • HYDROSTATIC SYSTEM
    • TROUBLESHOOTING
    • HYDROSTATIC SYSTEM INFORMATION
      • Replenishing Valve Function
      • Tow Valves
    • FRONT PANEL
      • Removal And Installation
    • STEERING LEVERS
      • Disassembly And Assembly
      • Neutral Pre–Adjustment Checks
      • Adjusting Lever Freeplay
      • Adjusting The Wheel RPM Forward Compared To Reverse Travel
      • Adjusting The Steering Neutral Setting
      • Adjusting The Wheel RPM Left Compared To Right Side
      • Hydrostatic Pump Neutral Adjustment
    • HYDROSTATIC MOTOR
      • Removal And Installation
    • HYDROSTATIC CHARGE OIL FILTER
      • Removal And Installation
    • COLD OIL BY–PASS VALVE
      • Removal And Installation
    • HYDROSTATIC PUMP
      • Removal And Installation
      • Replenishing/High Pressure Relief Valve
    • DRIVE BELT SHIELD
      • Removal And Installation
    • DRIVE BELT
      • Replacing The Drive Belt
    • SPRING LOADED TENSIONER PULLEY
      • Parts Identification
      • Disassembly
      • Assembly
      • Adjusting The Drive Belt
    • FIXED TENSIONER PULLEY
      • Removal And Installation
      • Disassembly
      • Assembly
      • Checking Pulley End Play
      • Adjusting The Drive Belt
    • OIL COOLER
      • Removal And Installation
  • DRIVE SYSTEM
    • PARKING BRAKE PEDAL
      • Adjustment
    • PARKING BRAKE
      • Removal And Installation
      • Brake Block And Pads
      • Brake Discs
    • FRONT CHAINCASE COVER
      • Removal And Installation
    • REAR CHAINCASE COVER
      • Removal And Installation
    • AXLE SEAL
      • Removal And Installation
    • AXLE, SPROCKET AND BEARINGS
      • Removal And Installation
    • REDUCTION GEARCASE
      • Reduction Gearcase Seal
      • Removal And Installation
      • Checking Reduction Gearcase
      • Disassembly
      • Assembly
    • DRIVE CHAIN
      • Removal And Installation
    • CHAINCASE FLUID
      • Removing The Fluid From The Chaincase
  • MAIN FRAME
    • OPERATOR CAB GAS CYLINDER
      • Removal And Installation
      • Disassembly And Assembly
    • OPERATOR CAB
      • Removal And Installation
      • BOB–TACH
      • Removal And Installation
      • Bob–Tach Lever And Wedge
      • Bob–Tach Stops
    • LIFT ARMS
      • Removal And Installation
    • REAR GRILL
      • Removal And Installation
    • 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
      • 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
      • 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 The Starter
      • Removal And Installation
      • Parts Identification
      • Disassembly And Assembly
      • Cleaning And Inspection
    • STANDARD INSTRUMENT PANEL
      • Removal And Installation
    • FRONT LIGHTS
      • Removal And Installation
    • STEERING LEVER CONTROL HANDLE (Early Series)
      • Disassembly And Assembly
  • ENGINE SERVICE
    • TROUBLESHOOTING
    • ENGINE SPEED CONTROL
      • Removal And Installation
    • ENGINE MUFFLER
      • Removal And Installation
    • AIR CLEANER HOUSING
      • Removal And Installation
    • COOLANT RECOVERY TANK
      • Removal And Installation
    • RADIATOR
      • Removal And Installation
    • FAN DRIVE TENSION PULLEY
      • Removal And Installation
    • FAN GEARBOX/BLOWER HOUSING
      • Removal And Installation
    • FAN GEARBOX
      • Parts Identification
      • Disassembly
      • Assembly
      • Checking Backlash
    • ENGINE
      • Removal And Installation
    • FLYWHEEL
      • Removal And Installation
      • Flywheel Ring Gear
    • BELT SHIELD
      • Removal And Installation
    • ENGINE MOUNTS
      • Removal And Installation
    • GLOW PLUGS
      • Checking The Glow Plugs
      • Removal And Installation
    • VALVE CLEARANCE
      • Adjustment
    • ENGINE COMPRESSION
      • Checking
    • FUEL INJECTION PUMP
      • Description
      • Removal And Installation
      • Timing The Injection Pump
    • FUEL INJECTOR NOZZLES
      • Checking
      • Removal And Installation
    • CYLINDER HEAD
      • Removal And Installation
      • Cylinder Head Surface Alignment
      • Exhaust Manifold
    • VALVES, VALVE SEAT AND GUIDE
      • Removal
      • Installation
      • Reconditioning The Valve And Valve Seats
      • Valve Seat Insert
      • Valve Guide
      • Valve Spring
    • ROCKER ARM AND SHAFT
      • Disassembly And Assembly
      • Checking Rocker Arm And Push Rods
    • PISTON AND CONNECTING ROD
      • Removal
      • Disassembly
      • Checking
      • Assembly
      • Installation
    • CYLINDER LINERS
      • Checking The Cylinder Bore
      • Removal
      • Installation
    • MAIN BEARINGS
      • Description
      • Removal
      • Installation
      • Crankshaft End Play
    • CRANKSHAFT
      • Removal And Installation
      • Checking The Crankshaft
    • CRANKSHAFT GEAR
      • Removal And Installation
    • TIMING GEARCASE COVER SEAL
      • Removal And Installation
    • TIMING GEARCASE COVER
      • Removal And Installation
    • IDLER GEAR AND HUB
      • Checking
      • Installation
    • FUEL INJECTION PUMP IDLER GEAR
      • Removal And Installation
      • Bearing Installation
    • CAMSHAFT GEAR
      • Removal And Installation
    • TIMING GEARCASE
      • Removal And Installation
    • CAMSHAFT
      • Removal And Installation
      • Checking
      • Camshaft Bearings
      • Tappets
      • Tappet Installation
    • OIL PAN
      • Removal
      • Installation
    • OIL PUMP
      • Removal And Installation
      • Checking
      • Gear Replacement
      • Rotor Replacement
      • Oil Pump Relief Valve
      • Oil Filter Housing And Block
    • WATER PUMP
      • Removal And Installation
      • Disassembly
      • Assembly
    • THERMOSTAT
      • Removal And Installation
      • Checking The Thermostat
    • WATER JACKET TUBE
      • Removal And Installation
  • SYSTEM ANALYSIS
    • BOSS® DIAGNOSTIC TOOL
      • Procedure
    • SENDER AND SENSOR
      • Service Checks
      • Component
    • RPM SENSOR
      • Adjustment
    • SERVICE CODES
      • Chart
    • TROUBLESHOOTING THE BOSS® & LCD DISPLAY
    • BOSS® UNIT
      • Removal And Installation
    • BOSS® INSTRUMENT PANEL
      • Removal And Installation
  • SPECIFICATIONS
    • LOADER SPECIFICATIONS
      • Loader Dimensions
      • Performance
      • Controls
      • Engine
      • Hydraulic System
      • Electrical
      • Drive System
      • Capacities
      • Tires
    • ENGINE SPECIFICATIONS
      • Cylinder Head
      • Valve, Valve Guide & Seat Insert
      • Valve Springs
      • Rocker Arm
      • Tappets
      • Piston, Pin & Rings
      • Connecting Rod & Bearing
      • Cylinder Liners
      • Camshaft
      • Crankshaft
      • Idler Gear
      • Oil Pump
      • Fuel System
    • 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
  • SERVICE MANUAL REVISIONS
    • 850–001
    • 850–002
    • 850–003
    • 850–004
    • 850–005
    • 850–006
    • 850–007
    • 850–008
    • 850–009
    • 850–010
    • 850–011
    • 850–012
    • 850–13
    • 850-14
    • 850-15

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