Pondering that which Dean Hoffman wrote:


There's a video he
https://www.youtube.com/watch?v=1VNSv7xVzzU
A quick check shows them available at Ace Hardware and Lowes. $25
to $35.
A shade tree fix would be some lubricant on the moving mechanism.

Thank you for that video where I watched at least a dozen subsequently
where I'm happy to see that people help each other with these videos.

Since I try to never replace a part that I can't prove is broken, I wrote
up this troubleshooting flow chart that I'd like to ask for review.

I'll likely do the work today but this is what I figured out overnight,
where I only blindly replace parts when I give up on troubleshooting, which
is usually only when I'm ignorant of how the system works.

Here's what I figured out from watching a dozen videos.

Non-inventory parts & tools needed:
(1) Water pressure tester GHT fitting (at least 0 psi to about 75 psi)
(2) Pressure gauge (NPT fitting) (at least 0 psi to about 75 psi)
(3) Pressure switch (Double-D brand, preset to the correct range)

Normal inventory parts & tools needed:
(1) Air compressor & hand-held Shrader gauge
(2) 220VAC voltmeter or DMM
(3) Wrenches, flat file, pipe dope, screwdrivers, Sharpie, and so forth

Basics of normal operation: (30-50 psi for homes with 20 pound
differential)
(1) The bladder is pressurized to about 28 psi in most homes (or 38)
(2) The pressure switch is set to close 4 pump contacts at 30 psi (or 40)
(3) The pressure switch is set to open 4 pump contacts at 50 psi (or 60)

Basics if the pump isn't turning on:
(1) The pressure to the pressure switch may be faulty
(2) The pressure switch contacts can be pitted or corroded or sticking
(3) The water line or the screen on the pressure switch may be clogged

Determine the design cut-in & cut-out pressure range
(1) Read pressure written on the tank & on the cap of the pressure switch
(2) Measure pressure in the tank at the cut-in & cut-off points
(3) Read the pressure gauge at the cut-in & cut-off points

Check bladder pressure
(1) Shut off the input/output to/from the pressure tank & drain
(2) Read pressure on tank when empty & full
(3) Bladder should be 2-4 psi below cut-in pressure (30-2 = 28 psi)

Clean debris clogging the pressure to the pressure switch:
(1) Clean the four contact switch points with a flat file.
(2) Clean debris from the screen on the bottom of the pressure switch
(3) Clean out the water tube connected to the pressure switch

What do the four contacts do
(1) Usually the inside two contacts generally obtain input line power
(2) Usually the outside two contacts generally output to the pump
(3) There are generally two ground screws, one each for the input & output

Safety concerns before removing components
(1) Turn off the power
(2) Shut off the nearest water valves to and from the pressure tank
(3) Drain the pressure tank of water until the pump gauge reads 0 psi

Adjust the pressure in the bladder & pressure switch if necessary
(1) Pressurize bladder to 28 psi
(2) Center large nut (3/8") adjusts the cut-in/cut-out 20-degree range
1 clockwise rotation tightening the large spring adds 2-3 psi
Example values are 35-55 psi, 40-60 psi, 45-65 psi, and so on
(3) Side small nut adults the cut-out pressure only (widens the range)
1 clockwise rotation = 2-3 psi
Example values are 35-55+2 psi, 40-60+2 psi, 45-65+2 psi, and so on

System overview videos
(1) [https://youtu.be/X4TZoFIsE2w]
(2) [https://youtu.be/CQayY5FTNKk]
(3) [https://youtu.be/Rb8k7xoBNSI]
(4) [https://youtu.be/2WGlRaTmvbM]
(5) [https://youtu.be/gJxjA5eDOS8]

Pressure tank videos
(1) [https://youtu.be/AH4H9mpwhnY]
(2) [https://youtu.be/w21qa2bMUh8]
(3) [https://youtu.be/9fTzXVIQDBY]
(4) [https://youtu.be/IhBifh7nCtg]
(5) [https://youtu.be/NzZI7WOnMMQ]

Pressure switch videos
(1) [https://youtu.be/Vq-8RCCeh3k]
(2) [https://youtu.be/1VNSv7xVzzU]
(3) [https://youtu.be/D1QAkfbIclo]
(4) [https://youtu.be/DmCoc4e2gyI]
(5) [https://youtu.be/8TI98cs85ew]