25
Plow lifts but does
not hold - New plow
first action
Dirt in check valve
Cycle raise and lower system to flush debris.
Dirt in lower valve (B)
Cycle raise and lower system to unstick valve.
Plow lifts but does
not hold - second
action
Dirt or Debris in check
valve
Cycle raise and lower system to unstick valve. If this does not work, replace
valve.
Lower valve (B) stuck
Check valve to make sure there in not magnetism on the "B" coil. Remove
the "B" valve and swap it with the "F" valve. If the blade lifts your valve was
stuck open. Replace the valve.
Seals, O-ring(s) on lower
valve (B) damaged
Remove the lower valve (B) and inspect the O-rings to see if they are
damaged. If damaged replace the O-ring if there is one available. If not
replace the valve.
Ground available at lower
coil (B) without activation
Test the control receiver to see if there is a ground signal sent to the lower
coil (B) without activation. This can be done using a Sno-Way control test
(99101028). If you do not have a test box remove the two wires off of the (B)
coil and check to see if the blue with the white trace wire has a ground signal
coming from it. The control will need to be turned on. Tap the raise function
to make sure the control is not in the float or down pressure mode as this
would send the ground signal to the wire. If the ground is present the
receiver (black/yellow box on snow plow) will need to be replaced. You
should also check the OHM reading on the (B) coil as well as the other coils
on the valve block. If the OHM reading on the (B) coil does not read the
same as the other coils replace the coil as well.
Piston seals leaking on
raise cylinder
Raise the plow up in the air and support the blade with a hydraulic floor jack.
Remove the hose off of the rod side of the lift cylinder. Slowly lower the floor
jack and watch to see what direction the fluid flows from the lift cylinder. If the
fluid sucks into the lift cylinder the seals are good. If the fluid flows out of the
lift cylinder fluid if leaking past the seals and the cylinder needs to be
replaced.
Unit will not lower
(Down pressure off)
Plugged breather cap
Remove and replace breather cap.
Low or no current
available at lower coil (B)
Check wiring harness to make sure the connection had not been severed. If
a ground is present when operated from the blue with the white trace wire
the coil may be weak. Swap coil with another coil on the valve block. If the
problem moves to a different function replace coil.
Lower valve (B) sticking
or stuck
Swap out the (B) valve with the (E) valve. If the plow lowers the valve is
sticking and should be cleaned or replaced.
Lower coil (B) inoperative
Check to see if the blue with the white trace wire has a ground signal. If it
does and the coil is not magnetized the coil needs to be replaced.
Raise cylinder damaged
allowing movement in one
direction only
Visually inspect lift cylinder. If it is damaged replace lift cylinder.
Driver side blade
wing moves in one
direction only
Low or no current
available at extend coil
(A)
Check wiring harness to make sure the connection had not been severed. If
a ground is present when operated at all wires. Swap the coil with another
coil on the valve block. If the problem moves to a different function, replace
coil.
(continued)
TROUBLESHOOTING GUIDE
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
Summary of Contents for 26V Series
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