Target Audience:
Owners, operators, mechanics, parts departments, restoration specialists of Allis-Chalmers 720 tractors.
Value Proposition:
Provides essential, organized part information in an accessible digital format, enabling efficient and accurate part sourcing and repairs. Offers significant cost savings compared to official printed versions or manual labor for part identification.
Illustrative Detail:
High-quality, detailed exploded view illustrations are a hallmark of this type of manual, crucial for understanding assembly and component relationships.
Part Number Accuracy:
Emphasis on providing correct OEM part numbers for ordering, minimizing errors and downtime.
Digital Convenience:
Instant download, searchable, bookmarkable, and indexable PDF format offers unparalleled ease of use and access compared to physical manuals.
Engine Components:
Cylinder head, block, pistons, crankshaft, camshaft, fuel injection system, lubrication system, cooling system components, starting motor, alternator/generator.
Transmission And Drivetrain:
Clutch assembly, gearbox components (gears, shafts, bearings), differential, rear axle components, PTO (Power Take-Off) assembly.
Hydraulic System:
Hydraulic pump, control valve, lift arms, cylinders, hoses, fittings, hydraulic reservoir components.
Front Axle And Steering:
Front axle beam, kingpins, tie rods, steering arms, steering column components, steering box/mechanism.
Rear Axle And Brakes:
Rear axle housing, planetary gears (if applicable), brake assembly components (drums, shoes, linkage).
Electrical System:
Wiring harnesses, switches, lights, starter, alternator/generator, battery mounting, fuse/circuit breaker locations (as illustrated by part breakdown).
Chassis And Frame:
Main frame components, drawbar hitch, counterweight mounting points, mounting hardware.
Operator Station:
Seat assembly, steering wheel, dashboard components, control levers, pedals, fenders, platform/floor pan.
Bodywork And Sheet Metal:
Hood, side panels, grille, fenders, battery box, fuel tank mounting.
Attachments And Options:
Components related to factory-offered attachments like front loaders, specific PTO options, or other common implements (if detailed in the IPL).
Part Identification:
Accurate identification of every part with corresponding part numbers.
Assembly Breakdown:
Detailed, exploded view illustrations of each major assembly, showing how parts fit together.
Part Ordering:
Facilitates correct part ordering by providing specific OEM part numbers.
Disassembly Guidance:
Implied by exploded views, aiding in understanding component separation for service.
Troubleshooting Support:
Indirect support via accurate part identification for diagnosing faulty components.
Depth:
Component-level detail for repair and replacement. Focuses on part numbers and visual identification, not step-by-step repair procedures.
Application:
Essential for parts sourcing, inventory management, and understanding the mechanical makeup of the tractor.
Searchability:
Fully searchable text content for quick part number or description lookup.
Navigation:
Bookmarked and indexed for efficient navigation through sections and assemblies.
Printability:
Printable on demand, allowing users to print specific pages or sections.
Viewing Options:
Viewable on any computer, zoomable for detailed illustration inspection.
Binding:
Not applicable (digital PDF format)
Paper:
Not applicable (digital PDF format)
Engine Make:
Allis-Chalmers (specific model typically associated with the 720 series)
Engine Type:
Diesel (common for tractors of this era and class)
Cylinder Count:
Likely 3 or 4 cylinders, depending on specific 720 sub-model or engine option.
Displacement:
Information not provided in product data, but typically in the 150-250 cubic inch range for tractors of this class and era. Requires consultation with specific tractor model details.
Horsepower:
Information not provided in product data. Typically in the 40-60 PTO horsepower range for a tractor of this size and configuration.
Torque:
Information not provided in product data.
Injection System:
Typically mechanical injection, likely rotary or inline pump from manufacturers like Stanadyne, Bosch, or Roosa Master, depending on the specific engine variant.
Transmission Type:
Manual Transmission
Gear Configuration:
Likely a multi-speed gearbox with multiple forward and reverse gears. Common configurations for this class include 8-speed, 12-speed, or 16-speed powershift or constant mesh transmissions.
Optional Transmission:
While not explicitly stated, some tractors of this era offered slight variations or synchronized options. The IPL would detail these.
Pto:
Power Take-Off (PTO) unit, likely with standard 540 RPM and potentially an optional 1000 RPM PTO, driven by the transmission.
Overall Length:
Information not provided in product data. Typical for utility tractors of this era, approximately 10-12 feet.
Overall Width:
Information not provided in product data. Varies based on tire size and configuration, typically 5-6 feet.
Operating Weight:
Information not provided in product data. Likely in the 4,000-6,000 lb range, depending on configuration and options.
Wheelbase:
Information not provided in product data. Crucial for stability and maneuverability.
Engine Oil Change:
Not specified in the product data. Typically, diesel engines of this era required oil changes every 100-250 operating hours, depending on oil quality and operating conditions. Refer to a dedicated service manual for precise intervals.
Hydraulic Fluid Change:
Not specified in the product data. Typically, a yearly change or every 500-1000 operating hours. This IPL is for parts, not maintenance intervals.
Engine Oil Type:
Not specified in the product data. Typically SAE 30 or 15W-40 diesel engine oil meeting API CD or CE specifications.
Hydraulic Fluid Type:
Not specified in the product data. Typically, UTF (Universal Tractor Transmission Fluid) or a hydraulic oil meeting JD-J20C or ISO VG 46 specification.
Transmission Fluid Type:
Not specified in the product data. Often shared with the hydraulic system (UTF), but transmission-specific lubricants may also apply. Consult a service manual.
Common Wear Parts:
Based on typical tractor wear, common issues involve clutch wear, hydraulic cylinder seal leaks, PTO bearing wear, and potential injector pump or starter issues. This IPL is invaluable for identifying and sourcing these specific parts.
Electrical Reliability:
Older wiring harnesses can degrade. This IPL will list all wire harness components and related electrical parts for replacement.
Brand History:
Allis-Chalmers was a prominent American manufacturer of agricultural and industrial machinery, known for its distinctive orange tractors. The brand has a long history dating back to the early 20th century.
720 Series Context:
The 720 series represents a line of utility tractors from Allis-Chalmers, typically produced during the 1970s or early 1980s, following the significant redesign of their tractor lines in the late 1960s. These tractors were designed for general farm work and offered good value and reliability.
Production Years:
Information not explicitly provided, but the 720 series likely falls within the 1970s to early 1980s production window for Allis-Chalmers utility tractors.
