International Harvester Tractors 706-21456 Series 1960s-1970s Shop Manual (P/N IH-706-756-806-856-SM)

• Covers 1960s-1970s International Harvester models from the 706 through 21456 series, detailing engine configurations from 263 to 407 cubic inch displacement
• Official publication (P/N IH-706-756-806-856-SM) providing exact factory specifications for diesel, gasoline, and LP-Gas drivetrain variants
• Contains 8 exploded-view system diagrams, 15 service data tables, and specific hydraulic test standards for the 06 and 56 series tractors
• Acts as a complete descriptive reference for your next tractor repair, outlining required clearances and settings for engine and drivetrain assembly
• Details the Torque Amplifier, Power Take-Off (PTO), Multiple Control Valve, Range Transmission, and Speed Transmission
• Explores turbochargers, flow dividers, magnetic pulse ignition, Roosa-Master injection pumps, and double disc brakes

Component and System Technical Overview

This 105-page PDF technical manual details the mechanical makeup of the engine block, head, and cylinder sleeves. It provides a thorough breakdown of timing gear alignment for various diesel and gasoline models. You will find extensive sections covering front systems, including both tricycle and axle-type arrangements, alongside the All-Wheel Drive transfer case and differential assemblies. Further chapters document the power steering system, fuel injection hardware, and hydraulic lift controls. Always ensure appropriate personal protective equipment is worn and heavy machinery is securely supported on jack stands prior to inspecting these pressurized systems or structural components.

Instead of outsourcing to an expensive dealership, technicians can follow the included step-by-step procedures to independently split the tractor for clutch service, overhaul the Torque Amplifier, and perform static timing on Robert Bosch and Roosa-Master injection pumps. To streamline troubleshooting, the guide is supplemented with electrical wiring diagrams, cross-sectional views of the brake self-adjusters, schematic views of the control linkages, and exploded-view drawings of the dual speed PTO unit. Experienced mechanics know that these specific IH models harbor a few notorious rebuild traps. For instance, inadvertently installing the Torque Amplifier one-way sprag clutch backward inside the drive gear will completely disable the underdrive unit upon reassembly. Furthermore, attempting to extract the injector nozzle sleeves on D361 or D407 diesels without the designated pulling tool can severely score the cylinder head bores, leading to immediate coolant leaks.

Specification Highlights

Reliable shop data is crucial for accuracy. This document includes comprehensive torque tables, fluid capacities, and electrical system parameters essential for evaluating components. For instance, valve tappet gaps are specified at 0.027 inches for many non-diesel configurations. Compression thresholds are firmly documented between 350 and 425 psi. The hydraulic system review provides critical flow and pressure data, notably highlighting pump output specifications of 9 GPM alongside exact relief valve pressure settings. Final drive and steering clearance limits are defined with high precision to facilitate any comprehensive drivetrain repair. The documentation ultimately details assembly, adjustment, and component identification for the complete powertrain range. This clear information gain translates directly to your daily workflow: having the precise factory shim pack formulas for adjusting differential carrier bearings and bull pinions prevents trial-and-error assembly, speeding up turnaround times and keeping your shop bays moving profitably.