Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Identification of pressure switch operating range

Status
Not open for further replies.
Chopsider

Chopsider

Electrical
Nov 9, 2021
2
I need assistance identifying the operating range of two pressure switches. They need replacing

They are made by a Japanese manufacturer WAKO , who I have tried communicating with but the language barrier is too hard.

The switches are discontinued . They are used in a Toyota wheel chair accessible vehicle. They are in the hydraulic circuit that lowers the vehicle.

The part is a PS-20 .

I have attached a photo of them . You can see the numbers stamped on the brass neck of the switch .

5 74
5X3 5X3

I am unsure if the identifying numbers stamped are universal if if they are specific to wako parts

If anyone can help it would be greatly appreciated
 
 https://files.engineering.com/getfile.aspx?folder=cf91c3d2-007a-47d2-a6cf-6ba4acb9bcc3&file=BE63A2C3-8328-4615-998B-2AAECB3960DC.jpeg
Replies continue below

Recommended for you

Sort by date Sort by votes
Replace them with pressure gauges.
Determine the maximum system pressure.
Select a replacement that will take 150% to 200% of the maximum operating pressure.
Replace the pressure gauges with the new switches.

--------------------
Ohm's law
Not just a good idea;
It's the LAW!
 
Upvote 0 Downvote
Chopsider: search engines can be wonderful things.
This page gives an operating range for the switch that can be anywhere from 0.1 to 12 MPa (14 psig - 1740 psig). What the ACTUAL setpoint is can be determined through the method defined by waross.

Converting energy to motion for more than half a century
 
Upvote 0 Downvote
Thanks for replying Gr8blu but I have checked that page and it was not of use too me .

The 2 pressure switches control the cut of the hydraulic pump that lowers the suspension on the car .

I installed a pressure gauge on the pump as suggested by waross .

after running under caution to find operating cut out/in ,Unfortunately a seal on the shock absorber ( where the hydraulic oil is pumped to compress it) has had a seal let go in it .
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

Engineer2021
  • Locked
  • Question
Ship electrical earth resistance value of 0.1ohm 1
Replies
4
Views
1K
Gr8blu
Gr8blu
trolex
  • Locked
  • Question
Class I, Division 2, rated accesories inside of typical NEMA 4X enclosure
Replies
2
Views
1K
trolex
trolex
rkvbobby123
  • Locked
  • Question
Calibration of DC Shunts ranging from 1 mOhms to 10kOhms; Standard these can be calibrated to.
Replies
0
Views
666
rkvbobby123
rkvbobby123
Skythian
  • Locked
  • Question
Changes to the definition of arc flash boundary in upcoming NFPA 70E 4
Replies
5
Views
909
dpc
dpc
sabotage
  • Locked
  • Question
Can a disconnect switch be also used as an ON/OFF control for a fan?
Replies
2
Views
293
dpc
dpc

Part and Inventory Search

Sponsor

Back
Top Bottom