On a real job, an MT55 is the little tracked mule that hauls dirt, pallets, and debris where a skid-steer just won't fit. The person who reaches for this service manual is the one under the machine in the customer's driveway, trying not to spill oil on the pavers. They're chasing a no-drive issue, a hydraulic leak, or an electrical fault and need the right specs and tear-down steps so they only make one parts run, not three.
What this manual helps you do
- Diagnose no-move or weak-drive complaints on the hydrostatic system and trace them to pumps, motors, or controls
- Check and set hydraulic pressures using test ports, then verify you're in spec after a repair
- Follow step-by-step removal and installation for major components like drive motors, cylinders, and final drives in tight spaces
- Rebuild or reseal hydraulic components and the Bob-Tach style attachment system with correct disassembly and reassembly sequences
- Troubleshoot electrical issues using wiring diagrams so you can sort dead circuits, bad switches, and sensor faults without guesswork
Who this is for
This is for a shop mechanic, mobile tech, small contractor, rental yard, or owner-operator who wants to actually fix an MT55, not just run it. If you only need operating instructions or safety info, you want the operator's handbook instead, not this manual.
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 that you can search and zoom so wiring diagrams are readable on a decent screen.
Q: My serial number is within 538811001-538899999. Am I covered?
A: Yes, if your MT55 serial tag falls in that range, this is the correct service manual for your machine variant.
Q: I just need to look up part numbers. Is this what I should buy?
A: No, for part numbers you want the parts catalog. This is the repair and diagnostics manual.
If you're wrenching on an MT55 in that serial range and need repair procedures and specs, this is the right manual. If you're just learning to operate it, it's the wrong one.
📘 Show Index
Table of Contents:
- MAINTENANCE SAFETY
- ALPHABETICAL INDEX
- CONTENTS
- FOREWORD
- SAFETY INSTRUCTIONS
- SERIAL NUMBER LOCATION
- Loader Serial Number
- Engine Serial Number
- DELIVERY REPORT
- BOBCAT LOADER IDENTIFICATION
- SAFETY AND MAINTENANCE
- LIFTING AND BLOCKING THE LOADER
- Procedure
- Four Point Lift
- LIFT ARM SUPPORT DEVICE
- TRANSPORTING THE BOBCAT LOADER
- TOWING THE LOADER
- SERVICE SCHEDULE
- AIR CLEANER SERVICE
- Replacing The Filter Elements (Early Models)
- Replacing The Filter Elements (Later Models)
- ENGINE COOLING SYSTEM
- Checking The Coolant Level
- Cleaning The Cooling System
- 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
- Checking And Adding Fluid
- Replacing Hydraulic Filter
- Hydraulic Reservoir Breather
- Replacing Hydraulic Fluid
- BOB-TACH
- Inspection And Maintenance
- LUBRICATION OF THE BOBCAT MINI LOADER
- Procedure
- Parking Brake Lubrication
- Pivot Pins
- SPARK ARRESTOR MUFFLER
- CONTROLS
- Reverse Stop Panel
- Lift And Tilt Function Lockouts
- Lift Arm By-Pass Controls
- Neutral Start Interlocks
- ELECTRICAL SYSTEM
- Description
- Fuse And Relay Location / Identification
- Cleaning Battery Terminals
- Using A Booster Battery (Jump Starting)
- Removing And Installing The Battery
- HYDRAULIC SYSTEM
- HYDRAULIC/HYDROSTATIC SCHEMATICS
- HYDRAULIC SYSTEM INFORMATION
- Workgroup Troubleshooting Chart
- Hydraulic Function Troubleshooting
- CYLINDER (LIFT)
- Checking The Lift Cylinder(s)
- Removal And Installation
- Parts Identification
- Disassembly And Assembly
- CYLINDER (TILT)
- Checking The Tilt Cylinder
- Removal And Installation
- Rod End Pivot Pin Bushing And Seal Replacement
- Parts Identification
- Disassembly And Assembly
- MAIN RELIEF VALVE
- Checking
- Removal And Installation
- PORT RELIEF VALVES
- Checking The Port Relief Valves (Lift)
- Removal And Installation (Lift)
- Checking The Port Relief Valves (Tilt)
- Removal And Installation (Tilt)
- HYDRAULIC CONTROL VALVE
- Removal And Installation
- Parts Identification
- Identification Chart
- Disassembly and Assembly
- HYDRAULIC PUMP
- Check The Output Of The Hydraulic Pump
- Removal And Installation
- Parts Identification
- Disassembly And Assembly
- HYDRAULIC FILTER
- Housing Removal And Installation
- HYDRAULIC FLUID RESERVOIR
- HYDRAULIC OIL COOLER
- HYDROSTATIC SYSTEM
- HYDROSTATIC SYSTEM INFORMATION
- Troubleshooting Chart
- Replenishing Valve Function
- DRIVE MOTOR
- Removal And Installation
- Parts Identification
- Disassembly
- Inspection
- Assembly
- HYDROSTATIC PUMP
- Charge Pressure Sender Removal And Installation
- Checking Charge Pressure
- Replacing Poppet Assembly
- Removal And Installation
- Replenishing/High Pressure Relief Valve
- Disassembly
- Assembly
- DRIVE BELT
- Removing Drive Belt Shield
- Adjusting The Drive Belt Tension
- Drive Belt Replacement
- Tensioner Pulley Removal And Installation
- Drive Belt Alignment
- HYDROSTATIC CONTROLS (S/N 528711001 – 528712699, S/N 528811001 – 528811149 AND S/N 538711001 – 538712499)
- Steering Assembly Identification
- Steering Assembly Removal And Installation
- Steering Linkage Adjustment
- Adjusting Forward Speed Control
- Adjusting Reverse Speed Control
- HYDROSTATIC CONTROLS (S/N 528712700 & ABOVE, S/N 528811150 & ABOVE AND S/N 538712500 & ABOVE)
- Steering Assembly Identification
- Steering Assembly Removal And Installation
- Steering Linkage Adjustment
- Adjusting Reverse Speed Control
- DRIVE SYSTEM
- PARKING BRAKE
- Handle Removal And Installation
- Cable Removal And Installation
- Cable Adjustment
- Removing The Linkage Assembly
- Brake Pin Lubrication
- DRIVE COMPONENTS
- Track Tension Checking
- Adjusting The Tracks
- Track Removal and Installation
- Track Frame Removal and Installation
- Rear Idler Assembly Removal and Installation
- Parts Identification (Rear Track Idler)
- Rear Idler Disassembly and Assembly
- Front Idler Disassembly And Assembly
- Track Tensioner Disassembly and Assembly
- Track Roller Removal and Installation
- Parts Identification (Track Roller)
- Track Roller Disassembly and Assembly
- Track Damage Identification
- MAIN FRAME
- BOB-TACH
- Removal
- Installation
- Seal Removal And Installation
- Lever And Wedge Removal
- LIFT ARM
- TAILGATE
- Removal And Installation
- Rear Door Panel Removal And Installation
- Tailgate Striker Removal And Installation
- Tailgate Striker Adjustment
- Tailgate Bumper Adjustment
- FUEL TANK
- INSTRUMENT PANEL
- GRAB BAR
- HOOD
- Removal and Installation
- Disassembly And Assembly
- Hood Latch Removal
- REVERSE STOP PANEL
- Description
- Inspecting Function
- Removal And Installation
- Reverse Stop Mechanism Removal And Installation
- BOTTOM ACCESS PANEL
- RIDE-ON PLATFORM
- Removal and Installation
- Tire Removal and Installation
- Caster Removal and Installation
- ELECTRICAL SYSTEM & ANALYSIS
- ELECTRICAL SCHEMATICS
- ELECTRICAL SYSTEM INFORMATION
- Electrical Troubleshooting Chart
- BATTERY
- Removal and Installation
- Servicing
- 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
- STARTER
- Removal And Installation
- Checking The Starter In The Loader
- Parts Identification
- Disassembly
- Inspection And Repair
- No Load Test
- Assembly
- INSTRUMENT PANEL
- Component Removal And Installation
- NEUTRAL START SENSOR (S/N 528711001 – 528712429, S/N 528811001 – 528811121 AND S/N 538711001 – 538712295)
- Description
- Removal And Installation
- Sensor Activation Adjustment
- Sensor Activation Bolt Removal
- NEUTRAL START SENSOR (S/N 528712430 & aBOVE, S/N 528811122 & ABOVE AND S/N 538712296 & ABOVE)
- Description
- Removal And Installation
- Sensor Activation Adjustment
- Sensor Activation Bolt Removal
- ELECTRICAL ATTACHMENT CONTROL REFERENCE
- Attachment Control Identification Chart
- ENGINE SERVICE
- ENGINE INFORMATION AND TESTING
- Engine Troubleshooting Chart
- ENGINE SPEED CONTROL
- Removal And Installation
- Disassembly And Assembly
- Cable Removal and Installation
- MUFFLER
- AIR CLEANER
- Housing Removal and Installation
- RADIATOR
- ENGINE COMPONENTS AND TESTING
- Valve Clearance Adjustment
- Fuel Injection Pump Check
- Fuel Lift Pump Removal And Installation
- Fuel Injection Pump Removal And Installation
- Fuel Injector Nozzles Checking
- Fuel Injector Nozzles Removal
- Fuel Injector Nozzles Installation
- Glow Plugs Checking
- Engine Compression Test Procedure
- Fuel Injection Pump Timing
- ENGINE (S/N 528711001 – 528712699, S/N 528811001 – 528811149 AND S/N 538711001 – 538712499)
- Removal And Installation
- Engine Mount Replacement
- ENGINE (S/N 528712700 & ABOVE, S/N 528811150 & above AND S/N 538712500 & ABOVE)
- Removal And Installation
- Engine Mount Replacement
- FLYWHEEL
- Flywheel Removal And Installation
- Flywheel Ring Gear Removal And Installation
- RECONDITIONING THE ENGINE
- Cylinder Head Removal And Installation
- Cylinder Head Inspection
- Cylinder Head Top Clearance
- Rocker Arm And Shaft Checking
- Valve Removal
- Valve Spring Checking
- Valve Guide Checking
- Reconditioning The Valve And Valve Seat
- Timing Gearcase Cover Removal And Installation
- Idler Gear And Camshaft Removal And Installation
- Servicing The Idler Gear And Shaft
- Checking Timing Gear Backlash
- Fuel Camshaft Removal And Installation
- Governor
- Crankshaft Gear Removal And Installation
- Oil Pump Removal And Installation
- Oil Pump Service
- Checking Engine Oil Pressure
- Relief Valve
- Piston And Connecting Rod Removal And Installation
- Piston And Connecting Rod Servicing
- Connecting Rod Alignment
- Crankshaft And Bearings Removal And Installation
- Inspection Of Crankshaft And Bearings
- Cylinder Bore Inspection
- Thermostat Removal And Installation
- Testing The Thermostat
- Water Pump Removal And Installation
- Water Pump Disassembly And Assembly
- Energize To Stop Solenoid
- ENGINE MOUNTING BRACKET
- Engine Mounting Bracket Removal And Installation
- HYDRAULIC GEAR PUMP MOUNTING BRACKET
- Hydraulic Gear Pump Mounting Bracket Removal And Installation
- Hydraulic Gear Pump Coupler Removal And Installation
- SPECIFICATIONS
- LOADER SPECIFICATIONS
- Loader Dimensions (MT52)
- Loader Dimensions (MT55)
- Performance
- Controls
- Engine
- Hydraulic System
- Electrical
- Drive System
- Capacities
- Tracks
- Ground Pressure
- ENGINE SPECIFICATIONS (KUBOTA D902-E2B)
- Engine
- Fuel Injector Nozzles
- Fuel Injection Pump
- Cylinder Head
- Valves
- Valve Springs
- Rocker Arms
- Camshaft
- Cylinders
- Piston Rings
- Pistons
- Connecting Rods
- Crankshaft
- Oil Pump
- Timing Gear
- Thermostat
- Engine Bolt Torque
- ENGINE SPECIFICATIONS (KUBOTA D722-E2B)
- Engine
- Fuel Injector Nozzles
- Fuel Injection Pump
- Cylinder Head
- Valves
- Valve Springs
- Rocker Arms
- Camshaft
- Cylinders
- Piston Rings
- Pistons
- Connecting Rods
- Crankshaft
- Oil Pump
- Timing Gear
- Thermostat
- Engine Bolt Torque
- TORQUE SPECIFICATIONS FOR BOLTS
- Torque For General SAE Bolts
- Torque For General Metric Bolts
- Torque For Kubota Metric Engine 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
- CONVERSIONS
- Decimal And Millimeter Equivalents
- U.S. To Metric Conversion
- SMR
- MT52, MT55-1
- MT52, MT55-2
- MT52, MT55-3
- MT52, MT55-4
- MT52, MT55-5
- MT52, MT55-6
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