Dover TWG 250PR Руководство по обслуживанию и ремонту - Страница 4

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Dover TWG 250PR Руководство по обслуживанию и ремонту

HYDRAULIC SCHEMATIC

The TWG 250PR is equipped with a spring applied hydraulically released static "park brake" and an
optional integral hydraulically applied dynamic "service brake". The park brake on this unit should
full release by pressurizing the "BR" port to 300 psi. The maximum pressure allowed into the park
brake is 3,000 psi. The service brake is applied by pressurizing the "BA" port while pressurizing the
"BR" port. The maximum pressure allowed into the service brake port is 1,000 psi. The service
brake can be cooled using a flow-thru cooling method by plumbing hydraulic oil into "BC IN" port
and plumbing "BC OUT" port back to tank. The maximum pressure allowed in the brake cavity (flow
thru cooling circuit) is 25 psi. Excessive pressure in the flow thru cooling circuit could damage the
oil seal separating the brake oil from the gearbox oil.
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