Poweramp BAR - LIFT BARRIER - Manual (Page 12)

1. Remove load. Unit is
designed to raise no more
than its own weight as a
safety feature.
1b. Locate solenoid.
Remove coil from spool
and spool from valve
block. Check spool for
contaminants and/or
damage. Replace spool
if damaged. Carefully
wipe off spool with clean
rag (do not damage “O”
rings on spool) Check
valve block for contami-
nants. Replace spool in
block and coil on spool.
DO NOT overtighten
spool into block. Maxi-
mum tightening torque for
spool is 35-40 lb/ft. DO
NOT overtighten coil on
spool. Operate the unit.
Replace spool if problem
persists and all other
troubleshooting proce-
dures performed.
1a. Load on barrier arm.
1b. 4 way valve stuck in
“lower” position
1. Barrier will not raise.
2. Barrier raises very
slowly. 2. Low hydraulic fluid. 2. Add hydraulic fluid as
needed See Page 7, Item
6.
OR, pump by-pass set
too low.
OR, increase by-pass
pressure. Page 14.
Remove acorn nuts and
washer back of nut. Back
up jam nut and, with
screwdriver, turn adjust-
ment.
OR, Pressure line filter
plugged. Inspect filter element and
replace if needed.
3. Barrier will not lower,
motor running. 3. 4 way valve (Page 17,
Item 5) stuck in “raise”
position. 3. Remove cartridge and
inspect for contamination.
Replace if needed. See
page 14, items 20 & 21.
4. Barrier bounces while
lowering. 4. Down speed control
valve (Page 17, Item 14)
set too fast. 4. Valve to about 1/2 turn
from closed and adjust
until barrier lowers
smoothly. (NOTE: valve has
locking set screw.
POSSIBLE CAUSE PROBABLE
REMEDY
TROUBLE
TROUBLESHOOTING THE HYDRAULIC SYSTEM
10