ELECTRIC SYSTEM CD3340B/YB4411
3-8
Published 04/07/2015 Control # 569-00
3. When disconnecting the charger, always remove the
negative (-) or ground connection first. Wait
approximately one minute after the charger has stopped
before disconnecting the chargers positive (+) wire. This
procedure will decrease the possibility of explosion of
hydrogen gas around the battery.
Battery Replacement
Removal
1. Remove the negative battery cables.
2. Remove the positive battery cables.
3. Tag and disconnect leads from the battery terminals
starting with the positive terminals.
4. Remove the nuts and washers from the bracket hold
down rods. Remove the hold down bracket.
5. Remove the battery.
Installation
1. Place the battery in the battery box.
2. Install the hold down bracket so it can hold down the
battery. Secure the bracket (and battery) to the bracket
hold down rods with nuts and washers.
3. Connect leads to the battery terminals starting with the
positive terminals.
4. Verify replacement battery works by starting crane’s
engine and operating various crane components.
STARTING CIRCUIT
The starting circuit includes the battery, starter motor and
solenoid, starter relay, neutral start relay, fuel shut-off valve,
travel select switch, and the ignition switch.
General Inspections
Many starting problems can be found by making the
following checks:
1. Check battery condition. Charge or replace the battery
as necessary. Clean battery posts and cable connectors.
2. Inspect wiring for worn insulation or other damage.
Replace bad wiring. Inspect all connections at the starter
motor, starter solenoid, starter relay, neutral start relay
and wire harness plugs. Clean and tighten all
connections and replace any bad wiring.
3. If the starter still does not operate after correcting the
circuit, perform the Starting Circuit Check.
Starting Circuit Check
NOTE: If the starter will not turn the engine, the following
checks will help find a faulty component in the
starting circuit. Use a test lamp or voltmeter to
perform the checks.
1. Place the ignition switch in the OFF position and place
the travel select lever in neutral.
2. See the electrical schematic at the end of this manual.
Momentarily connect a jumper cable to the “B” and “S”
terminals on the starter solenoid.
a. If the starter operates, the starter and solenoid are
good. The problem is somewhere between the
solenoid and the ignition switch. Go to step 3.
b. If the starter does not operate, connect the jumper
cable to the “B” and “M” terminals on the starter
solenoid. If the starter operates correctly, the
problem is in the starter solenoid. Replace the
solenoid. If the starter still does not operate, the
starter is bad and must be repaired or replaced.
3. Check the voltage at the “BAT” terminal of the ignition
switch. If no voltage is indicated, there are wrong
connections or damage to the wiring between the starter
and the ignition switch. If voltage is indicated, go to step
4.
4. Turn the ignition switch to the START position and check
voltage at the start terminal. Go to step 5 if voltage is
indicated. If no voltage is indicated, replace the ignition
switch.
5. Have someone hold the key switch in the START
position, check for voltage at wires 21 and 21A on the
neutral start relay located under the instrument panel.
Make sure the travel select lever is in the NEUTRAL
position.
If voltage is indicated at the relay wire 21A, go to step 6.
If there is no voltage at wire 21, check the wire to the
ignition switch. If there is voltage at wire 21 and no
voltage at wire 21A, replace the relay.
6. Turn the ignition switch to the START position. Connect
a jumper wire between wires 21A and “B” on the starter
solenoid. If the starter operates, the starter relay is
defective and must be replaced. If the starter did not
operate, go to step 7.
7. With the ignition switch in the START position, check for
voltage at the switch “S” terminal of the starter solenoid.
If there is no voltage, the problem is in the wire from the
CAUTION
The ignition switch must be in the OFF position when
performing steps 1 and 2. If the switch is in the ON
position, the engine may start if the travel select switch is
in the neutral position. Personal injury is possible.
Reference Only
To Next Page
Loading...
Need help?
General
