Model 660P
Trouble Shooting Guide
Sympton Possible Cause Correction
Knife or clamp will not 1) Bad Ls-u top clamp switch Replace the
go down when foot or Ls-d down switch switch
pedal is pressed or ( check note )
when the two yellow
button is pressed 2) T1 is not working right Replace T1
3) The knife down and up Replace
relay is not working relay
in the down mode on the hydraulics
#8
Note : This is how to check the top Ls-u and bottom Ls-d switches to see if
they are ok
1) Remove back top cover and find the switch Ls-u ,next take the
allen screw off one side of the Ls-u switch and tilt it to the side
2) Remove the side cover where the Ls-d switch ,so you may touch
the switch when you have to
3) Now have someone hold the arm of the Ls-u switch in the up
position
4) Turn on the power to the machine
5) Now press the two yellow buttons and release the arm of the Ls-u
switch ,then touch the Ls-d arm ,next then move the arm of the
Ls-u into the up position
6) Turn off the power to the machine and put all the parts back in
there place
Comment : If the U relay works on hydraulics system then the switches are
are working right ,also you can check the inputs and outputs
signal on your PLC unit
https://www.supplychimp.com
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