Snorkel SL30SL, Operating Manual

Page: 53 / 64

Chapter 11 – Troubleshooting
SL30SL – 8210037 49
Symptom Possible Cause Corrective Action
Platform will not raise or lower. Engine is not running. Start the machine from the control
station where you will operate the
machine.
Switches set wrong. From the lower controls:
y
Press the platform raise or lower
button and hold the enable but-
ton.
From the upper controls:
y
Press the platform raise/lower
button then squeeze and hold the
interlock switch. Push the joystick
forward to raise the platform or
pull it backward to lower.
Emergency lowering knob is open. Push the emergency lowering knob
inward to close the valve.
Machine not level. Lower the platform and drive to a
level surface or use the speed level
to level the platform.
Drive functions do not work. Drive/lift selector is in the lift posi-
tion.
Place the switch in the drive posi-
tion.
Machine is not on a level surface or
too steep a grade.
Lower the platform and drive to a
level surface.
Free-wheeling valve is open. Fully close the free-wheeling valve.
Low hydraulic system pressure. Stow the machine and do not oper-
ate until repairs are made.
Speed level set. Fully lower the aerial platform to
deactivate the speed level.
Can not reach maximum drive speed
of 3.1 mph (5.0 km/h).
Platform is elevated above 6 ′ (1.8 m). Fully lower the platform.
Low speed drive range button is
selected.
Select the high speed drive range
button.
Machine will not steer. Joystick interlock switch is not en-
gaged.
Engage the interlock switch before
operating the steer switch.
Wheels won’t turn when winching
or pushing.
Brake are engaged / free-wheeling
valve open.
Release the brakes by closing the
free-wheeling valve (clockwise) and
pumping the break release hand
pump.
Brakes do not work. Brake cylinder rod is not extended /
free-wheeling valve closed.
Reset the brakes by opening the
free-wheeling valve (counterclock-
wise).
Tilt alarm does not work. Platform is not raised more than 6 ′
(1.8 m).
Normal operation. The tilt alarm is
not active until the platform is raised
about 6 ′ (1.8 m).
Hydraulic fluid temperature 200°F
(93°C) or more.
Prolonged machine operation or
driving.
Stop operation until fluid cools.
High pressure fluid return to reservoir
caused by kink or twisted hose.
Remove the kink or twist from the
hose. Let fluid cool before operating.
Severe hydraulic leak. Failure of hose, tube, fitting, seal,
etc.
Do not operate machine until repairs
are made.