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Bobcat 553 Loader Service Manual (SN 520411001-520499999)

Format: PDF (Printable Document)

File Language: English

File Pages: 410

File Size: 13.94 MB (Speed Download Link)

Brand: Bobcat

Model: 553 Loader

Book No: 6901824

Serial No: SN 520411001-520499999

Type of Document: Service Manual

Categories: ,

$ 45

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Bobcat 553 Loader Service Manual (SN 520411001-520499999)

On a job, a Bobcat 553 is the little skid-steer that squeezes into backyards, barn aisles, and tight loading areas where bigger loaders just won't fit. The service manual is what I grab when I'm in a customer's gravel driveway with a jack, a laptop, and truck-stock tools, trying to get a dead machine earning money again. People reach for this manual when they're chasing hydraulic issues, no-move problems, wiring gremlins, or doing real teardown work instead of just topping off fluids.

What this manual helps you do

  • Diagnose no-start, low power, or smoking issues on the small diesel engine and plan a proper repair
  • Trace and troubleshoot hydraulic and hydrostatic drive problems, then check pressures with a gauge set
  • Follow step-by-step removal and reinstallation of drive motors, pumps, cylinders, and major loader components
  • Rebuild or reseal cylinders, valves, and other hydraulic parts with correct disassembly and reassembly sequences
  • Check, adjust, and verify things like linkage, chain tension, control levers, and safety interlocks after repairs

Who this is for

This manual is for anyone working on a Bobcat 553 loader in the serial range 520411001 to 520499999, whether you're a small contractor, owner-operator, rental yard, or shop mechanic. If you only need basic operating instructions or daily maintenance tips, you want the operator's handbook instead, not this service manual.

FAQ

Q: Is this a searchable PDF and are the wiring diagrams readable?

A: These manuals are usually scanned or native PDFs that you can search, and the wiring diagrams are laid out to be zoomed in on a laptop or tablet.

Q: How do I know if it matches my exact 553?

A: Check your loader's serial plate. If it falls between 520411001 and 520499999, this is the right service manual.

Q: Is this what I need for real repairs, not just fluid changes?

A: Yes, this is the workshop-level service manual, meant for diagnostics, teardown, and reassembly, not routine walk-around checks.

Bottom line: If your 553's serial number is in that range and you're doing your own repairs beyond basic maintenance, this is the manual you want.

📘 Show Index

Table of Contents:

  • MAINTENANCE SAFETY
  • ALPHABETICAL INDEX
  • CONTENTS
    • FOREWORD
    • SAFETY INSTRUCTIONS
      • Fire Prevention
    • SERIAL NUMBER LOCATION
      • Loader Serial Number
      • Engine Serial Number
    • DELIVERY REPORT
    • BOBCAT LOADER IDENTIFICATION
  • SAFETY AND MAINTENANCE
    • LIFTING AND BLOCKING THE LOADER
      • Procedure
    • LIFT ARM SUPPORT DEVICE
      • Installing Lift Arm Support Device
      • Removing Lift Arm Support Device
    • OPERATOR CAB
      • Description
      • Raising The Operator Cab
      • Lowering The Operator Cab
      • Emergency Exit
    • TRANSPORTING THE BOBCAT LOADER
      • Procedure
      • Stopping The Bobcat Loader
    • TOWING THE LOADER
      • Procedure
    • REMOTE START
      • Procedure
    • SERVICE SCHEDULE
      • Chart
    • AIR CLEANER SERVICE
      • Replacing Filter Element
    • ENGINE COOLING SYSTEM
      • Cleaning The Cooling System
      • Checking The Coolant Level
      • Replacing The Coolant
    • FUEL SYSTEM
      • Fuel Specifications
      • Filling The Fuel Tank
      • Fuel Filter
      • Removing Air From The Fuel System
    • ENGINE LUBRICATION SYSTEM
      • Checking Engine Oil
      • Oil Chart
      • Replacing Oil And Filter
    • HYDRAULIC/HYDROSTATIC SYSTEM
      • Description
      • Checking And Adding Fluid
      • Replacing The Hydraulic/Hydrostatic Filter
      • Replacing Hydraulic Fluid
    • FINAL DRIVE TRANSMISSION (CHAINCASE)
      • Checking And Adding Oil
    • AUXILIARY CONTROL LOCKBOLT
      • Removal
    • BOB-TACH
      • Inspection And Maintenance
    • LUBRICATION OF THE BOBCAT LOADER
      • Procedure
    • TIRE MAINTENANCE
      • Wheel Nuts
      • Rotating
      • Mounting
    • SPARK ARRESTOR MUFFLER
      • Cleaning Procedure
    • PIVOT PINS
      • Procedure
    • SEAT BAR RESTRAINT SYSTEM
      • Description
      • Seat Bar Inspection
      • Seat Bar Maintenance
    • RUBBER COUPLER LUBRICATION
      • Procedure
  • HYDRAULIC SYSTEM
    • HYDRAULIC/HYDROSTATIC SCHEMATICS
    • HYDRAULIC SYSTEM INFORMATION
      • Tighten Procedures
      • Troubleshooting Chart
    • CYLINDER (LIFT)
      • Checking
      • Removal And Installation
      • Identification
      • Disassembly And Assembly
    • CYLINDER (TILT)
      • Checking
      • Removal And Installation
      • Identification
      • Disassembly And Assembly
    • MAIN RELIEF VALVE
      • Checking The Main Relief Valve Without Auxiliaries
      • Checking The Main Relief Valve With Auxiliaries
      • Removal and Installation
    • HYDRAULIC CONTROL VALVE
      • Removal And Installation
      • Identification Chart
      • Disassembly And Assembly
      • Load Check Valve
      • Main Releif Valve
      • Anti-Cavitation Check Valve
      • Port Relief Valve
      • Rubber Boot (Lift)
      • Rubber Boot (Tilt)
      • Rubber Boot (Aux.)
      • Lift Spool Detent
      • Tilt Centering Spring
      • Auxiliary Spool Detent
      • One Way Restrictors
      • Inspection
      • Spool Seal Installation
    • LIFT ARM BY-PASS CONTROL VALVE
      • Inspecting
      • Removal and Installation
      • Disassembly and Assembly
    • TILT LOCK VALVE
      • Removal And Installation
      • Disassembly and Assembly
    • HYDRAULIC PUMP
      • Check The Output Of The Hydraulic Pump
      • Removal And Installation
      • Identification
      • Disassembly And Assembly
      • Inspection
    • HYDRAULIC FILTER HOUSING
      • Removal and Installation
    • HYDRAULIC FLUID RESERVOIR
      • Removal and Installation
  • HYDROSTATIC SYSTEM
    • HYDROSTATIC SYSTEM INFORMATION
      • Troubleshooting Chart
      • Replenishing Valve Function
    • CONTROL PANEL
      • Removal and Installation
    • STEERING
      • Lever Removal and Installation
      • Lever Disassembly And Assembly
      • Linkage Removal And Installation
      • Pintle Lever Disassemby And Assembly
      • Linkage Neutral Adjustment
    • HYDROSTATIC MOTOR
      • Removal And Installation
      • Parts Identification
      • Disassembly And Assembly
      • Inspection
      • Timing The Hydrostatic Motor
    • PORT BLOCK
      • Removal And Installation
      • Oil Cooler By-Pass Valve
      • Hydraulic Oil Temperature Switch
      • Charge Pressure By-Pass Valve
    • HYDROSTATIC PUMP
      • Checking Charge Pressure
      • Removal And Installation
      • Drive Coupler Removal And Installation
      • Parts Identification
      • Disassembly And Assembly
      • Inspection
    • OIL COOLER
      • Removal and Installation
  • DRIVE SYSTEM
    • PARKING BRAKE
      • Disk Removal And Installation
      • Traction Lock Guides Removal And Installation
    • DRIVE COMPONENTS
      • Axle Seal Removal And Installation
      • Axle, Bearing, And Sprocket Removal And Installation
      • Chain Removal And Installation
    • CHAINCASE
      • Removing Oil From The Chaincase
      • Front 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 And Assembly
      • Removal And Installation
    • OPERATOR SEAT
      • Removal And Installation
      • Seat Belt Removal And Installation
    • BOB-TACH
      • Removal And Installation
      • Bob-Tach Lever And Wedge
    • LIFT ARM
      • Removal And Installation
    • REAR GRILL
      • Removal And Installation
    • REAR DOOR
      • Removal And Installation
      • Striker Removal and Installation
      • Striker Disassembly and Assembly
      • Adjusting The Striker
      • Latch Removal and Installation
    • FUEL TANK
      • Removal And Installation
      • Fuel Level Sender
    • CONTROL PEDALS
      • Removal And Installation
      • Pedal Adjustment
      • Pedal Interlock Linkage Removal And Installation
      • Pedal Interlock Linkage Adjustment
      • Crossbar Linkage Removal And Installation
  • ELECTRICAL SYSTEM
    • ELECTRICAL SCHEMATICS
    • ELECTRICAL SYSTEM INFORMATION
      • Troubleshooting
      • Description
      • Fuse Location
      • Relay Switches Location
    • BATTERY
      • Removal And Installation
      • Using A Booster Battery (Jump Starting)
    • ALTERNATOR
      • Removal And Installation
      • Adjusting The Alternator Belt
      • Description
      • Tests
      • Alternator Output Test
      • Full Field Test
      • Alternator Regulator Test
      • Alternator Regulator Test Using Voltmeter
      • Parts Identification
      • Pulley Removal And Installation
      • Disassembly And Assembly
      • Rotor Continuity Test
      • Stator Continuity Test
      • Rectifier Continuity (Diode) Test
      • Brush Length
    • STARTER
      • Removal And Installation
      • Checking The Starter In The Loader
      • Parts Identification
      • Disassembly
      • Inspection And Repair
      • No Load Test
      • Assembly
    • INSTRUMENT PANEL
      • Removal And Installation
    • LIGHTS
      • Front Removal And Installation
    • BICS™ SYSTEM CONTROLLER
      • Trouble Shooting Guide
      • Removal And Installation
    • BICS™ SYSTEM (WITH PRESS TO OPERATE BUTTON)
      • 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
      • Troubleshooting Chart
    • SEAT BAR SENSOR
      • Troubleshooting Guide
      • Seat Bar Sensor Test
      • Removal And Installation
      • BICS™ Controller Seat Bar Sensor Circuit Test
    • TRACTION LOCK
      • Troubleshooting Guide
      • Removal And Installation
  • ENGINE SERVICE
    • TROUBLESHOOTING
      • Chart
    • ENGINE SPEED CONTROL
      • Removal And Installation
      • Disassembly
      • Linkage Bar Removal And Installation
    • ENGINE SPEED CONTROL PLATE
      • Removal And Installation
      • Governor Spring Removal
      • Start Spring Removal
      • Idle Limit And Fuel Limit Adjustment
    • MUFFLER
      • Removal And Installation
    • AIR CLEANER
      • Removal And Installation
    • RADIATOR
      • Removal And Installation
    • BLOWER FAN HOUSING
      • Removal And Installation
    • ENGINE COMPONENTS AND TESTING
      • Compression Checking
      • Glow Plugs Checking
      • Glow Plugs Removal And Installation
      • Fuel Shut-Off Solenoid, Removal And Installation
      • Fuel Lift Pump Removal And Installation
      • Fuel Injection Pump, Checking
      • Fuel Injection Pump Removal And Installation
      • Timing The Injection Pump
      • Fuel Injector Nozzles Removal And Installation
      • Checking Fuel Injector Nozzles
      • Engine Timing Installation
    • ENGINE
      • Removal And Installation
      • Engine Mounting Brackets Removal And Installation
    • FLYWHEEL
      • Removal And Installation
      • Flywheel Ring Gear
      • Housing Removal And Installation
    • RECONDITIONING THE ENGINE
      • Thermostat Removal And Installation
      • Water Pump Removal And Installation
      • Timing Gear Case Cover Removal And Installation
      • Oil Pump Removal And Installation
      • Crankshaft Front Seal Removal And Installation
      • Exhaust Manifold Removal And Installation
      • Valve Cover Removal And Installation
      • Rocker Arm Removal And Installation
      • Push Rod Removal And Installation
      • Tappet Removal And Installation
      • Cylinder Head Removal And Installation
      • Checking Piston Top Clearance
      • Disassembly
      • Assembly
      • Servicing The Cylinder Head
      • Combustion Chamber Removal And Installation
      • Idler Gear Removal And Installation
      • Camshaft Removal And Installation
      • Fuel Camshaft Removal And Installation
      • Oil Pan Removal And Installation
      • Governor Shaft Removal And Installation
      • Governor Fork Lever Removal And Installation
      • Piston Removal And Installation
      • Checking The Piston And Connecting Rod
      • Connecting Rod Alignment
      • Pison Ring Gap
      • Piston Ring Installation
      • Connecting Rod Installation
      • Checking Engine Cylinder Bore
      • Crankshaft Removal And Installation
      • Checking Crankshaft Journal And Block Bearing
      • Checking The Crankshaft Journal And Main Bearing
      • Connecting Rod Journal
      • Checking the End Play Of The Crankshaft
      • Crankshaft Alignment
      • Idler Gear And Crankshaft
      • Idler Gear And Crankshaft Gear
      • Idler Gear And Fuel Camshaft Gear
      • Fuel Camshaft Gear And Governor Shaft Gear
    • RUBBER DRIVE COUPLER
      • Removal And Installation
      • Disassembly
      • Assembly
    • WATER FLANGE
      • Removal And Installation
  • SPECIFICATIONS
    • LOADER SPECIFICATIONS
      • Machine Dimensions
      • Performance
      • Controls
      • Engine
      • Hydraulic System
      • Electrical
      • Drive System
      • Capacities
      • Tires
    • ENGINE SPECIFICATIONS
      • Engine Compression
      • Fuel Injection Nozzles
      • Fuel Injection Pump
      • Cylinder Head
      • Valves
      • Valve Springs
      • Rocker Arms
      • Camshaft
      • Cylinders
      • Piston Rings
      • Pistons
      • Crankshaft
      • Oil Pump
      • Thermostat
      • Crankshaft Re-Grind Data
    • 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
  • SMR
    • 553-1
    • 553-2

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