Oliver 1755, 1855, 1955 Tractors Service Manual (P/N DL-SM-3)

When you are tracking down a hydraulic issue or verifying torque specs, you need fast access to reliable data. This OEM documentation (Publication No. DL-SM-3) cuts out the guesswork, delivering 69 pages of consolidated technical specifications for the entire series.

• Covers 1970–1975 Oliver 1755, 1855, and 1955 tractors, including Rowcrop, Wheatland, and Four-Wheel Drive configurations.
• 119 technical illustrations, featuring 5 distinct exploded-view diagrams specifically isolating the front-wheel drive axle and Hydra-Power drive unit.
• Essential fluid capacities, including the 43-quart transmission volume and 5-gallon cooling system limits.

System Breakdown and Component Details

This material maps out the construction of the tractor's major systems without the fluff. You get a clear look at the engine assembly, cooling system, and electrical components. It also isolates specialized parts for the short wheelbase and four-wheel drive front axles. Instead of relying on memory during a tear-down, you can review the exact layout of the clutch assembly, transmission gear train, and the Hydra-Power auxiliary drive. The hydraulic lift system, remote control valves, and diesel injection pump timing are also detailed to support complex diagnostic work.

Critical Tolerances and Specifications

Having the exact tolerances on hand saves significant time during engine rebuilds. The text documents engine cylinder head torque values at 129–133 ft-lbs for non-diesel units, while specifying 180 ft-lbs for specific diesel head bolt patterns.

You will find precise measurements required for machining and adjustments, such as the 0.019–0.021 inch intake valve clearance (non-diesel) and the 0.373–0.374 inch valve guide inside diameter for the spiral groove end on diesel blocks.

Always cross-reference these specifications with your machinery's current condition before applying torque or pressure. Working on heavy tractor drivetrains and high-pressure hydraulic systems carries inherent physical risks, so this material serves purely as a professional reference to support safe, informed maintenance practices by qualified individuals.