Ashland 1200 TR - Manual (Page 36)

36
TROUBLE SHOOTING YOUR HYDRAULIC SYSTEM
PROBLEM POSSIBLE CAUSES REMEDY
Cylinder won’t develop Leaking piston packing Apply pump flow to one end
full force or hold position and stroke cylinder until it
when valve closes lines bottoms out at end of stroke.
Loosen return line at opposite
end (from pressurized end)
and measure leakage flow
coming out. Any flow more
than slow dripping requires
new piston packing. Repeat
for opposite end and stroke.
Worn 4-way control valve Disconnect cylinder lines at 4-
way valve and plug. Shift
valve to either position and
check to see if full pressure
builds up. If relief is not built
into 4-way valve, check to see
how much flow is leaking
across to the tank port.
Loss of system pressure See previous trouble shooting
guide.
Cylinder loses force at Scored barrel Repeat above except
some intermediate point mechanically stop piston rod
in stroke so piston is at point where
force drops off. If leakage is
determined, barrel must be
repaired or replaced.
Dented barrel Examine barrel tube for dents
at point where it loses force.
Replace if tube is dented.