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[POCLAIN ACADEMY] Static Brake Stroke Control Measurement

  Рет қаралды 2,610

Poclain

Poclain

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In this video we will check the static brake stroke measurement of the motor generally called the parking brake.
The demonstration uses a T11 type brake in which the minimum brake release pressure is 12 bars. This means that at 12 bars (174 PSI) the brake begins to release. In our example we will set the pressure at 12 bars (174 PSI) + 5 bars (72.5 PSI) so 17 bars (246.5 PSI). At 17 bars (246.5 PSI) the brake is fully released, do not exceed 30 bars (435 PSI). In this example 30 bar is the maximum pressure. Refer to the catalog to know your specific values.
Steps:
1) Unscrew the safety valve on the lock plate.
2) Remove the drain port screw. Why? - because if there is a leak between the brake body and the cover, the opening of the drain port orifice will avoid the pressure rise in the case and therefore avoid sealing ring destruction.
3) Fix a fitting onto the brake port orifice and connect a source of energy, in the example we use Nitrogen. (Reminder - use the minimum pressure eg. 12 bars (174 PSI) + 5 bars (72.5 PSI) found in the catalog.)
4) Use the depth gauge measurement, at the orifice of the safety valve and set it at 0.
5) Open the energy source to release the brake and read the value.
6) Compare the result with the value in the technical catalog. If the value conforms, rescrew the safety valve with the correct tightening torque. If the value does not conform, ask for a repair at your closest Poclain Certified Repair Center.
[Disclaimer]
This video is intended for authorized service technicians. Attempts to disassemble or repair the Poclain components by anyone else may compromise components, and consequently the application in which it is installed, and may void warranties.
Performing repairs may require the component to be removed from the application. Clean the unit before beginning maintenance or repair. Since pollution is the greatest enemy of all types of hydraulic components, follow cleanliness requirements strictly. This is especially important when changing the system filter and removing hoses or fittings.
Use of components that do not comply with Poclain’s specifications may result in loss of performance and may constitute a safety hazard. Do not reuse components that don’t comply to given specifications, replace with genuine Poclain service parts.
Major or significant repairs requiring the opening of components void the warranty, unless performed by Poclain or by a Poclain Certified Repair Center.
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