Make:
Bobcat (Clark Equipment / Melroe Company)
Model:
642B Skid Steer Loader
Model Variant:
642B — B-series revision of the 642 platform
Machine Type:
Rubber-tired skid steer loader
Production Years Covered:
Mid-1980s to early 1990s B-series production
Manual Type:
Service Repair Workshop Manual
Target Audience:
Skid steer technicians, fleet mechanics, and DIY owners servicing the 642B
Intended Use:
In-shop repair, scheduled maintenance, and rebuild work
Scope:
Factory-level procedures, diagnostics, and specifications in one volume
Searchability:
Fully searchable PDF with bookmarked chapters and zoomable pages
Portability:
Works on Windows PC, Mac, tablets, and smartphones
Repair Procedures:
Step-by-step assembly, disassembly, and repair sequences
Specifications:
Factory tolerances, wear limits, and torque values
Diagnostics:
Symptom-based troubleshooting flowcharts and diagnostic trees
Coverage:
All models, engine variants, and trim levels for the 642B
Procedures:
General information, safety warnings, and maintenance schedules through component overhaul
Diagnostics:
Electrical testing, component function verification, and fault isolation
Manual Type:
Service Repair Workshop Manual
Page Count:
N/A - not specified in the supplied source
Format:
Searchable PDF — zoomable, printable, bookmarked
Delivery:
Instant digital download, no shipping
Access:
Download again anytime after purchase
General Information:
Machine identification, safety warnings, and maintenance schedules
Engine:
Complete engine overhaul — disassembly, inspection, rebuild
Transmission and Drivetrain:
Service procedures for transmission and drive components
Electrical System:
Diagnostics and repair of the machine wiring and charging system
Brakes:
Brake system inspection and service
Suspension and Steering:
Skid steer steering and chassis component service
Cooling and Heating:
Cooling system and cab heating service
Fuel System:
Fuel system maintenance and repair
Assembly and Disassembly:
Step-by-step procedural diagrams with tool usage illustrations
Troubleshooting:
Flowcharts and symptom-based diagnostic trees
Electrical Testing:
Multimeter procedures and circuit testing
Wear Inspection:
Wear limit inspections and allowable tolerances for all components
Component Verification:
Function checks for individual components
Torque Values:
All factory torque specs included, with tightening values for all fasteners
Tolerances:
Factory specifications, tolerances, and wear limits included
Service Tools:
Special service tool numbers with illustrations
Parts Diagrams:
Exploded-view parts diagrams with OEM part numbers
Component Location:
Component identification and location guides
Wiring Diagrams:
Detailed electrical schematics and wiring diagrams
Device Support:
Windows PC, Mac, tablets, and smartphones
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
Engine Options Range:
Refer to manual for detailed specifications — final drive engine varies by build
Rated Output:
N/A - see manual for the specific build
Rated Speed:
N/A - see manual for the specific build
Fuel System Service:
Fuel system maintenance and repair procedures included
Type:
Hydrostatic drive, one pump and motor per side
Drive:
Four-wheel drive through chain-reduction final drives
Optional Units:
N/A - hydrostatic drive was standard for this model
Steering:
Skid steer — counter-rotating wheel speeds provide turning
Service Coverage:
Transmission and drivetrain service procedures included
Wheelbase:
N/A - not specified in the supplied source
Length:
N/A - not specified in the supplied source
Width:
N/A - not specified in the supplied source
Curb Weight:
N/A - not specified in the supplied source
Rated Operating Capacity:
N/A - not specified in the supplied source
Crash Test Information:
N/A - not applicable to an off-road skid steer loader
Operator Presence:
Seat bar interlock to stop drive and lift functions
Machine Controls:
Hand and foot control levers with neutral lock
ROPS:
Roll-over protective structure standard on the 642B
Seat Belt:
Operator restraint belt
Gauge:
Refer to the maintenance schedule in the manual for the applicable intervals by hour meter reading
Fluids and Capacities:
Refer to the manual for factory fluid recommendations and fill capacities
Known Issues and Common Wear Items
Common Wear Items:
Drive chains, tires, hydraulic hoses, and filter elements
Troubleshooting:
Flowcharts provided for hydraulic, electrical, and engine symptoms
Manufacturer:
Bobcat — Melroe Company, later Clark Equipment and then Bobcat Company
Origin:
The Melroe family of North Dakota developed the original skid steer loader design
Model:
642B — the B-series revision of the 642 platform
Platform:
Early B-series of Bobcat skid steer loaders
Built In:
Gwinner, North Dakota, USA (Bobcat manufacturing plant)