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Title:
OVERLOAD RELIEF VALVE ADJUSTING METHOD AND CIRCUIT OF THE SAME
Document Type and Number:
Japanese Patent JP2001050203
Kind Code:
A
Abstract:

To enable a simple and accurate adjustment by providing a branch oil passage on a discharge side oil passage of a hydraulic pump and connecting the open end with a manifold capable of mounting an overload relief valve.

A hydraulic pump 41 is stopped, an overload relief valve 50 to be adjusted is removed from a hydraulic equipment and a port in the part is closed by a blind plug. The removed valve 50 is mounted on a mounting part 51 of a manifold 46, a tank port T1 is connected with a hydraulic tank T, the pump 41 is operated, a control signal is outputted to regulator 47 so that a pump inclination angle may be minimum and discharge flow rate of the pump 41 is made constant. Reading of a pressure gauge 48 is made rated pressure by an adjusting screw 50a of the valve 50, the pump 41 is stopped again after an adjustment is finished, the valve 50 is removed, and the valve 50 is mounted on its original part of the hydraulic equipment. After adjustments of all the valves are finished, the mounting part 51 and the port T1 are closed. As a result, the adjusting work becomes easy, pressure loss from the pump 41 to the valve 50 is reduced and adjustments with accuracy can be performed.


Inventors:
ISHIYAMA HIROSHI
FUJITANI HIFUMI
Application Number:
JP22023299A
Publication Date:
February 23, 2001
Filing Date:
August 03, 1999
Export Citation:
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Assignee:
SUMITOMO CONSTR MACH
International Classes:
F15B11/028; (IPC1-7): F15B11/028
Attorney, Agent or Firm:
Kenji Kubota



 
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