Make:
Bobcat (Clark Equipment / Melroe Company)
Model Variant:
Skid Steer Loader
Production Years Covered:
Mid-1970s through the 1980s 642 production era
Manual Type:
Factory-style service repair workshop manual
Publication Subject:
Bobcat 642 Skid Steer Loader
Format:
Digital PDF download
Delivery:
Instant download after purchase
Target Audience:
Professional technicians, mechanics, and DIY owners servicing the Bobcat 642
Machine Class:
Compact rubber-tire skid steer loader
Typical Use:
Construction, landscaping, agriculture, material handling, and site cleanup
Coverage Depth:
Factory-level repair procedures, diagnostic information, and technical specifications
Service Scope:
From routine maintenance to complete engine overhaul and hydraulic repair
Diagnostics:
Symptom-based troubleshooting with diagnostic flowcharts
Illustrations:
Exploded-view parts diagrams, wiring schematics, and step-by-step procedural diagrams
Specifications:
Torque values, tolerances, wear limits, and special tool numbers
Usability:
Searchable, zoomable, printable PDF with bookmarked chapters
General Information:
Safety warnings, machine identification, and maintenance schedules
Engine:
Disassembly, inspection, rebuild, and adjustment procedures
Drive and Hydraulics:
Hydrostatic drive, hydraulic pumps, motors, valves, and cylinders
Electrical:
Diagnostics, repair, wiring diagrams, and component testing
Chassis Systems:
Brakes, steering (skid steer control), cooling, and fuel systems
Manual Type:
Service repair workshop manual
Page Count:
N/A - page count not stated in the supplied description
File Format:
Searchable PDF (zoomable, printable, bookmarked)
Delivery Method:
Instant digital download, download again anytime after purchase
Binding:
Digital - no physical binding
Device Compatibility:
Windows PC, Mac, tablets, and smartphones
General Information:
Machine identification, safety warnings, and maintenance schedules
Engine Service:
Complete engine overhaul including disassembly, inspection, and rebuild
Transmission and Drivetrain:
Hydrostatic drive and drivetrain service procedures
Hydraulic System:
Pumps, motors, control valves, cylinders, and loader arm circuits
Electrical System:
Diagnostics and repair of starting, charging, and accessory circuits
Brake System:
Inspection and service of the parking/emergency brake mechanism
Steering and Controls:
Skid steer drive control levers, linkages, and adjustment
Cooling System:
Cooling system maintenance and component repair
Heating System:
Heating components where equipped
Fuel System:
Fuel delivery maintenance and repair procedures
Diagnostic Flowcharts:
Symptom-based troubleshooting with diagnostic trees
Electrical Testing:
Multimeter procedures and component function verification
Wear Inspection:
Wear limit inspections and allowable tolerances for all components
Assembly and Disassembly:
Step-by-step procedures with tool usage illustrations
System Verification:
Component function verification and post-repair checks
Technical Depth and Parts
Torque Specifications:
All factory torque specs and tightening values for fasteners included
Tolerances:
Factory specifications, tolerances, and wear limits
Special Tools:
Special service tool numbers with illustrations
Parts Diagrams:
Exploded-view parts diagrams with OEM part numbers
Component Identification:
Component identification and location guides
Wiring Diagrams:
Detailed wiring diagrams and electrical schematics
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Primary Engine:
Air-cooled gasoline engine, Wisconsin or Onan industrial type depending on build
Displacement:
Refer to manual for detailed engine specifications
Fuel System:
Carbureted gasoline fuel system
Cooling:
Air-cooled with blower housing and cooling fins
Ignition:
Battery-and-coil ignition system
Torque Values:
All factory torque specs included in the manual
Tolerances:
Factory specifications, tolerances, and wear limits included
Horsepower:
N/A - exact rating varies by engine build; refer to manual
Standard Transmission:
Hydrostatic drive with variable-displacement pump and hydraulic motors
Drive Type:
Rubber-tire skid steer, driven by independent left and right hydraulic motors
Speed Control:
Infinitely variable forward and reverse via hydrostatic control levers
Steering:
Skid steering by differential drive speed of the left and right wheels
Final Drive:
Chain-and-sprocket final drive to the wheels
Parking Brake:
Mechanical parking/emergency brake on the drive system
Service Coverage:
Pump, motor, chain case, and linkage service procedures included
Length:
N/A - exact transport length not stated in the supplied description
Wheelbase:
N/A - exact wheelbase not stated in the supplied description
Width:
N/A - exact width not stated in the supplied description
Height:
N/A - exact height not stated in the supplied description
Curb Weight:
N/A - exact operating weight not stated in the supplied description
Rated Operating Capacity:
N/A - refer to the machine data plate and manual specifications
Machine and Operator Safety
Operator Restraint:
Seat belt and restraint system for the operator station
Loader Arm Support:
Mechanical loader arm lock or support strut for service safety
Machine Stability:
Low center of gravity and short wheelbase skid steer design
Neutral Start:
Neutral safety start switch prevents starting in gear or drive engaged
Safety Warnings:
General information and safety warnings included in the manual
Service Precautions:
Hydraulic system pressure and hot component warnings
Lifting and Blocking:
Procedures include safe lifting, blocking, and support instructions
Steering Control:
Twin lever skid steer control for independent left and right drive
Loader Control:
Lever or pedal control for lift and tilt functions
Instrumentation:
Basic gauges and warning indicators for engine and hydraulic condition
Electrical and Accessories
Charging System:
Battery and alternator or generator charging system
Lighting:
Work lights and basic machine lighting where equipped
Diagnostics:
Electrical system testing with multimeter procedures in the manual
Maintenance Schedules:
Routine service intervals are included in the manual general information section
Break-In Service:
Initial service and adjustment checks after rebuild or overhaul
Hydraulic Filters:
Hydraulic filter service per the scheduled maintenance chart in the manual
Engine Oil:
Refer to manual for specified engine oil grade and viscosity
Hydraulic Fluid:
Refer to manual for approved hydraulic fluid specifications
Chain Case Lubricant:
Refer to manual for final drive chain case lubricant specification
Capacities:
Refer to manual for all fluid capacities and fill points
Known Issues and Wear Items
Hydrostatic Drive:
Pump and motor wear causes weak drive or drift; test procedures included
Hydraulic Leaks:
Hoses, seals, and cylinder packing are common wear points
Drive Chains:
Final drive chain stretch and sprocket wear require periodic inspection
Tires:
Uneven tire wear and pressure affect traction and steering
Manufacturer:
Bobcat, originally the Melroe Manufacturing Company of Gwinner, North Dakota
Brand Origin:
The Bobcat name became synonymous with the skid steer loader it pioneered
Corporate History:
Melroe was later acquired by Clark Equipment and then Ingersoll Rand
Model Role:
The 642 is a mid-size, mid-era Bobcat skid steer loader
Production Era:
Built during the 1970s and 1980s generation of Bobcat loaders
Design Lineage:
Follows the original M-series skid steer concept with hydrostatic drive
Assembly:
N/A - specific plant for this model not stated in the supplied description
Model and Era Recognition
Brand Recognition:
Bobcat is widely recognized as the originator of the skid steer loader
Industry Standing:
The Bobcat skid steer became a standard machine class in construction and agriculture
Specific Awards:
N/A - no specific awards documented for this model in the supplied description