Elliott Traffic Safety Service L60, Operator'S Manual

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Troubleshooting aerial EEC-0132 V1.1
Troubleshooting
Category Problem Possible Cause Diagnostic Action Corrective Action
Outrigger Leg creeps up
under load or
down during
storage. Pilot check valve
defective or
Worn seals
inside cylinder. Clean or replace
check valve or
replace seals.
Outrigger Leg will not
lower. Bent let causing
mechanical bind. Replace leg.
Valves A lack of
pressure on
boom valve bank
only. Unloader spool
stuck in the
unload position. Build up pressure by
dead-ending outrigger
cylinder and release. Check pressure
filter. Remove
unloader spool and
clean if necessary.
Valves Pressure will
drop at low RPM,
unit is very slow. Main pump is
worn or trans.
torque converter
is slipping. Measure pump flow
rate. Replace pump or
repair.
Emergency
Pump Will not activate
at ground station
or remote. Circuit breaker
tripped. Test light at
emergency pump to
check for voltage with
switch activated. Replace circuit
breaker.
Emergency
Pump Pump speed will
work from
ground control
but not from
remote. Broken remote
switch, wire
from platform to
plug, plug to
boom terminal,
terminal at
boom to panel
terminal. Check wire continuity
from point to point.
Bypass switch to check
for operation. Use spare wire, or
replace switch.