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| Illustration 1 | g00758557 |
Schematic of the Lubrication System (1) Lubrication tank. (2) Lubrication pump for pivots of feed roller arms. (3) Needle valve (left pivot). (4) Needle valve (right pivot). (5) Pivot of the left feed roller arm. (6) Pivot of the right feed roller arm. (A) Line to the feed roller arm cylinders | |
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| Illustration 2 | g00758561 |
Components of the Lubrication System for the Feed Roller Arms (1) Lubrication tank. (3) Lubrication pump (pivots). (5) Needle valve (left pivot). (6) Needle valve (right pivot). | |
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| Illustration 3 | g00761832 |
Cross Section of Lubrication Pump (Pivots) (3) Lubrication pump (pivots). | |
When the feed roller arms open, oil in the piston end of the feed roller arm cylinders flows through a hydraulic hose assembly to the bottom of lubrication pump (2). The pressurized oil forces a piston in lubrication pump (2) upward. When the piston moves upward, lubricating oil is pumped to the shafts of the feed roller arms.
Needle valves (3) and (4) are used to adjust the flow of oil to each shaft. The needle valves are adjusted in order to ensure that both shafts receive the oil.
When the feed roller arms close, the hydraulic oil pressure on the piston is released. A spring in the lubrication pump forces the piston downward. The downward motion of the piston draws in oil from the lubrication tank on the harvester head.