Adjustment Procedures; Checking Pump Pressures; Troubleshooting Guide - Snorkel SL26 Series Parts And Service Manual

ADJUSTMENT PROCEDURES

Hydraulic settings must be checked whenever a component is repaired or replaced.
• Do not remove the counterbalance valves and "bench test" them if they are faulty.
• Only replace them with valves of the same type.
• Connect a pressure gauge of appropriate range to the test port located on the hydraulic mani-
fold.
• Correct pressure settings are listed in the hydraulic schematic.

CHECKING PUMP PRESSURES

Remove hose from manifold pump port and connect pressure gauge.

TROUBLESHOOTING GUIDE

Trouble
All functions do not operate,
engine does not start.
Loss of hydraulic power with
engine "ON".
Loss of electrical power with
engine "ON" and hydraulic
power available.
Platform drifts down
SL26/30SL
Probable Cause
Faulty battery.
Loose or broken battery lead.
Emergency stop
switch/switches failed to open.
Oil level in hydraulic reservoir
is low.
Faulty hydraulic pump.
Emergency lowering valve
open
Platform overloaded and alarm
sounds.
Faulty controller at upper con-
trols.
Battery level low.
Emergency lowering valve
opened.
Leaking piston seals in lift
cylinders
TROUBLESHOOTING
Remedy
After completely charging bat-
teries, test each battery. Re-
place if necessary.
Check continuity of all battery
and motor leads. Replace if
necessary.
With emergency stop switch in
the "ON" position, check conti-
nuity.
Check hydraulic fluid level and
top up as required.
Check pressure and delivery
of the hydraulic oil. Replace if
necessary.
Close emergency lowering
valve.
Observe maximum load rating
(refer to operation section of
this manual).
Check functionality of control-
ler. Replace if faulty.
Check battery voltage. Charge
the battery if necessary.
Ensure that the emergency
lowering valve is completely
closed. Replace if necessary.
Check for leakage at cylinder
return line. Replace seals if
necessary.
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