1959 Oliver OC-4 Crawler Tractor Parts Manual (P/N S6-9-102A)

• Covers 1959 Oliver OC-4 gas crawler tractors equipped with the four-cylinder engine (serial numbers ITG000 and up)
• Original OEM publication Form No. S6-9-102A, final edition from April 1959
• Contains 102 pages featuring 42 specialized sections with hundreds of exploded-view parts diagrams and detailed assembly components
• The definitive source for identifying OEM-specified components for the ITG000-series build

Component Documentation Breakdown

This 1959 Oliver OC-4 catalog provides a complete structural breakdown of the crawler's mechanical systems. It lists individual parts, assembly numbers, and required quantities for the main frame, four-cylinder engine, cooling architecture, and fuel management system. You get detailed illustrations showing the internal configuration of the transmission case, differential assembly, steering brake controls, and final drive systems. This gives you the exact context needed to identify gear sets and bearing seals accurately on the shop floor. Specialized sections also cover throttle and governor controls, magneto ignition components, and the complex electrical system complete with wiring diagrams.

Technical Data Preview

Coverage extends directly to the track assemblies and undercarriage components. This includes track frames, guide supports, front wheel assemblies, and rock guards. The manual breaks down various grouser types—from street plates to rubber tread options—fitting the 31-inch to 68-inch gauge configurations. Detailed schedules for packaged service kits, like engine overhaul gaskets and transmission seal kits, assist heavily in maintenance planning.

The structure of the factory parts documentation ensures accurate component selection based on your specific tractor build. Coolant system architecture is defined by a thermostat range of 175–195°F, while the four-cylinder power unit utilizes specific manifold gaskets documented in the engine assembly section. Hydraulic relief operations are governed by pressure thresholds between 1430 and 1570 psi. Always verify the correct part numbers for these high-pressure hydraulic components and heavy structural elements prior to installation to maintain factory operating safety standards.