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Troubleshooting, service tips, and major improvements for ...

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The hydrostatic transmissions used in 943, 953, 963 and 973 loaders ... 943 lgp track loader / high drive / 19z00253-up (machine) powered . 75 pages
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Troubleshooting, Service Tips, And Major Improvements ForHydrostatic Transmissions (Special Edition){3200}943, 953, 963, 973 LoadersIntroductionThe hydrostatic transmissions used in 943, 953, 963 and 973 Loaders look quite different from powershift or direct drive transmissions. The hydrostatic transmission consists of a case, pump drive, headand top and bottom covers.... The case contains the two axial piston pumps for the drive system. These pumps provide thehigh pressure oil for the motors that drive the tracks.... The pump drive housing is on the engine side of the case. Inside the pump drive housing arethe gears needed to transfer the power from the engine to the axial piston pumps.... The head is mounted on the front side of the case. The head, along with the charge and mainrelief valves that are mounted on it, works as a manifold system that directs the high pressureoil from the piston pumps to the motors. The head and valves also transfer the charge pump oilinto the drive circu...