Troubleshooting - HLA BR72 Operator's Manual

PROBLEM
Brush slows or stops when
sweeping
Brush head swings too quickly
Brush head swings too slowly or
won't swing
Brush head swings only one
direction
Brush head assembly "bounces"
during sweeping
Brush wears into cone shape
Brush wears very quickly
Hydraulic drive motors
malfunctioning

TROUBLESHOOTING

POSSIBLE CAUSE
Travel speed too fast
Trying to sweep too much
material at once
Relief pressure set too low
Pump has failed
Filter plugging
Hydraulic motor is failing
Set screw in plug on manifold
loose
Set screw in plug on manifold too
tight
Set screw on manifold out of
adjustment
Dirt or debris in spools
Travel speed too fast and/or
brush speed too slow
Core is bent
Broom is not level
Tires on power unit at different
pressures or are different sizes
Brush pattern too wide
Low hydraulic fluid level
Improper hose hookup
Broken hydraulic line
Jammed brush
Quick disconnect coupler(s) are
not connected or "Flow Check"
Hydraulic hose blockage
Hydraulic fluid leaking past seals
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SOLUTION
Travel no more than 5 mph (8kph) while
sweeping
Make several passes with Broom
Set relief pressure to 2000 psi (138.0 bars)
Contact dealer to repair or replace
Change or clean filter
Test hydraulic system
Loosen jam nut and then turn set screw in
until it stops; turn set screw out 1½ turns;
tighten jam nut
Loosen jam nut and then turn set screw in
until it stops; turn set screw out 1½ turns;
tighten jam nut
Loosen jam nut and then turn set screw in
until it stops; turn set screw out 1½ turns;
tighten jam nut
Contact your dealer or HLA
Find correct combination of ground
and brush speeds: do not travel at
more than 5 mph (8 kph)
Replace core
Level Broom before each use
Check tire sizes and rating; make
corrections as necessary
Adjust brush pattern 2-4 inches
(5-10cm)
Check and replenish hydraulic fluid.
Check and correct hydraulic hose
connections.
Check for leaks and replace line.
Remove interference.
Check coupler connections.
Replace coupler(s) if necessary.
Check for evidence of damage to hoses
that would block flow of oil between
cylinders and control valve.
Replace seals.