The MT55 is a stand-on mini track loader that spends its life in tight spots: loading wheelbarrows, grading backyards, feeding augers and trenchers. Around my shop, this level of service manual comes out when downtime is killing a job and I need the right procedure, not guesses from the internet. If you're rebuilding, chasing hydraulic issues, or sorting electrical gremlins on an MT55 in this serial range, this is the manual you'd reach for.
What this manual helps you do
- Diagnose no-move or weak-drive complaints in the hydrostatic and track drive system
- Check and set hydraulic pressures when attachments are slow or dead
- Follow step-by-step teardown and reassembly for major components like cylinders, drive motors, and pumps
- Trace and troubleshoot electrical and safety circuit problems using wiring schematics
- Replace and adjust mechanical linkages, controls, and Bob-Tach style interfaces with the right specs
Who this is for
This is for a small contractor, owner-operator, rental fleet shop, or field tech working on a Bobcat MT55 Loader Mini Track in the 538711001-538799999 serial number range. If you just need to learn how to run the machine or do basic daily checks, you want the operator's handbook instead.
FAQ
Q: Is this a searchable PDF, and can I read the wiring diagrams on a laptop or tablet?
A: These manuals are usually searchable PDFs, and the wiring diagrams are meant to be zoomed so you can read pin numbers and wire colors.
Q: How do I know if it covers my exact MT55?
A: Check your machine's serial tag. If it falls between 538711001 and 538799999, this is the right service manual family.
Q: Is this what I need for real repairs, not just maintenance?
A: Yes. This is the workshop-level service manual, the one you use for teardown, diagnostics, and proper reassembly.
Bottom line: If your MT55 serial number is in that range and you're doing your own repairs, this is the right manual. If the serial doesn't match, skip it.
📘 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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