JLG 3369LE Service Maintenance Manual page 44

SECTION 3 - CHASSIS & SCISSOR ARMS
• Underspeed
Enabled once TDBP (time delay bypass) period has
elapsed after engine startup. If the engine speed drops
below the underspeed limit, the engine will stop immedi-
ately and an engine underspeed alarm will be indicated.
• Overcrank
If the engine fails to start after a set number of start
attempts, the RBS will cease attempts to restart and an
engine overcrank alarm will be indicated.
• No Speed Signal
In the event of a loss of speed signal, the RBS will shut-
down and an engine no speed signal alarm will be indi-
cated. This shutdown is delayed by a factory set period to
ensure the fault was not momentary.
• Overvoltage
If the voltage measured at the alternator output exceeds
the high voltage setting, the RBS will stop immediately
and an RBS high output alarm will be indicated. This shut-
down is delayed by a factory set period to ensure the fault
was not caused by a transient condition. This feature pro-
tects the batteries and load from high DC voltages.
• Engine Starting System Fault
Indicates a problem with either the engine start battery,
engine magneto, or magneto voltage regulator.
• Loss Of Voltage Sense
If the voltage measured at the alternator output is less
than half of the system nominal voltage, the RBS will stop
immediately and an RBS loss of voltage sense alarm will
be indicated. This feature protects the batteries and load
from high DC voltages due to a loss of output control.
• Run Inhibited
The RBS unit is disabled by the run inhibited input.
Output Current and Voltage Settings
• Normal/Extended Output Voltage
The normal/extended output voltage setting is the voltage
at which the alternator changes under normal operating
conditions.
• Current Limit
The current limit setting determines the maximum alterna-
tor output current.
• High Voltage Shutdown Level
This setting determines the alternator output voltage at
which the high voltage shutdown occurs. This protects the
load from abnormally high voltages.
• Finish Charging Current
The finish charging current determines the level of the cur-
rent alternator output must drop below for a low battery
3-18
voltage CTS to be removed. This ensures that the batter-
ies have accepted sufficient charge prior to shutting down
the RBS. This level is used along with the low battery volt-
age remove CTS level to determine when the RBS
removes the CTS after a low battery voltage CTS. If the
charging current falls below the finish charging current
while another CTS is active, the RBS will continue to oper-
ate at the normal/extended output voltage until all CTS's
are removed.
Priming the Fuel Line
The following procedure is for re-priming the fuel line on
the generator engine in the event fuel system components
have been replaced or the unit has been run dry of fuel..
1. Make sure the fuel line isn't blocked or kinked.
2. Make sure fuel tank has fuel.
3. Disconnect the rubber fuel line at the fuel injector
pump.
4. When fuel starts to flow out of the rubber line, recon-
nect the fuel line to the fuel injector pump.
5. Clean up any spilled fuel and try to start the genera-
tor again.
6. If the engine still doesn't start, remove the steel line
from the fuel injectoe pump.
7. Once fuel starts to flow, reconnect the fuel line to the
fuel injector pump.
8. Clean up any spilled fuel and try to start the genera-
tor again.
9. If no fuel flows there are some possibilities:
a. There is no fuel getting to the injector pump. No
fuel in tank, or obstruction in fuel line, or clogged
in line fuel filter.
b. The engine/camshaft rotation is not opening the
injection fuel pump. Using the recoil starter,
rotate the engine 1/3 of a turn and fuel should
spill from the fuel injector pump.
– JLG Lift – 3121122