Oliver SUPER 55HC / SUPER 55 DIESEL / 550 HC / 550 DIESEL Shop Manual (P/N 1LS1701C)

• Covers 1955–1960s Oliver SUPER 55HC, SUPER 55 DIESEL, 550 HC, and 550 DIESEL tractors, including fixed and adjustable tread configurations (P/N: Unlisted).
• Official 63-page OEM publication covering essential repair data, provided as a high-quality PDF.
• Features 47 exploded-view diagrams and 3 distinct troubleshooting charts for diesel systems and hydraulic controls.
• Outlines step-by-step procedures for tractor split teardowns, Power Take-Off (PTO) clutches, double disc brakes, wet-type cylinder sleeves, valve rotators, engine water pumps, and Marvel-Schebler carburetors.
• Details factory specifications for final drive bull gears, belt pulley units, engine oil pumps, injector nozzles, differential bearing cages, wheel axle shafts, fuel transfer pumps, and wiring diagrams.

Component and System Documentation

Professionals and mechanics need reliable reference material to keep bay times down. By providing precise factory tolerances and specialized breakdown sequences, this manual helps prevent costly comebacks and eliminates parts-chasing. It empowers technicians to execute labor-intensive jobs in-house—such as performing a complete mid-chassis tractor split or overhauling the Saginaw power steering gear—rather than outsourcing to an expensive dealership. This documentation breaks down procedures for the engine, transmission, and hydraulic systems. You will find specific descriptive details on engine assembly, connecting rod placement, cylinder head replacement, and timing gear alignment. It covers both diesel and HC (high compression) gasoline engines.

Tackling a complex rebuild? The transmission segment clearly outlines the six-speed constant mesh gear train. It lists the necessary specifications for removing the input double gear, servicing countershaft components, and handling the differential bevel gear. Steering system sub-sections outline the exact components of the manual Saginaw recirculating ball nut gear and power steering units. Having the right specs eliminates guesswork during any major repair.

Hydraulic and Fuel System Specifications

The hydraulic lift system section meticulously documents the Vickers vane pump alongside internal control valve spool adjustments. It details dual-system linkage setups, including manual selector and double feed-back configurations. Fluid capacities are clearly listed for the hydraulic reservoir, transmission case, and crankcase.

Diesel operators will find the step-by-step documentation on the American Bosch fuel injection pump phasing highly valuable. It specifies nozzle opening pressures at 1750 PSI and covers energy cell servicing. Electrical schematics and data highlight Delco-Remy generator/regulator specifications and 6/12-volt starting motor references.

Precision is critical when reassembling these engines. The manual provides exact torque values: 92–100 ft. lbs. for non-diesel cylinder heads, and 112–117 ft. lbs. for diesel models. Main bearing caps require 88–92 ft. lbs., while connecting rod bolts are standardized at 46–50 ft. lbs. across all variants. Because working with pressurized hydraulic lines and heavy engine blocks carries inherent physical risks, ensure you have proper heavy-duty lifting equipment and practical experience before proceeding with any extensive mechanical work.

Don't leave your machine's performance to guesswork—get the official repair documentation you need to complete your rebuild with confidence