Manitowoc Published 09-10-14, Control # 065-24 7-3
14000 SERVICE MANUAL POWER TRAIN
NOTE: Detailed test information is provided by the meter
manufacturer.
High Resistance Test
When cranking, a voltage drop of more than 0.2 volts
between the starting motor cable and ground can cause hard
starting regardless of a battery’s condition. The voltage drop
can be caused by a poor contact between the cable terminal
and ground or between the clamp terminal and the battery
post. Poor start-switch contacts and frayed, broken, or
corroded cables can also be the cause.
Quarterly
1. Thoroughly clean the batteries and the holder with
baking soda.
2. If provided, make sure the drain holes are open in the
holder. If water collects in the holder, drill drain holes.
3. Clean the posts and terminals. The posts can be tightly
coated with grease to prevent corrosion.
4. Make sure the hold-downs are in good condition;
replace faulty parts.
5. Replace frayed, broken, or corroded cables.
6. Replace the batteries if their containers are cracked or
worn to the point they leak.
7. Ensure a good tight contact between the clamp
terminals and battery posts.
8. Make sure the hold-downs are tight enough to prevent
battery movement but not so tight to cause distortion.
Charging
The battery should be at room temperature when recharging.
Before a battery is recharged, it must be thoroughly cleaned.
Take care not to allow dirt to enter the cells.
A battery should be recharged in the way it was discharged.
If it was discharged over a long period of time, it should be
recharged slowly at 6 to 10 amperes for up to 10 hours. A
rule-of-thumb value for a slow rate is a current equal to about
one-half the number of plates per cell in the battery. A battery
with 13 plates per cell, should, therefore be charged at 7
amperes.
If a battery was discharged rapidly (cranking until dead), it
can be recharged on a fast charger with an output of up to 40
amperes for a maximum of 2 hours. If the electrolyte
temperature reaches 125°F (52°C) or if it gases violently, the
charging current must be reduced or halted to avoid battery
damage.
For optimum charging results, adhere to the charger
manufacturer’s instructions.
Storage
When the crane is left idle for prolonged periods, it should be
run periodically to charge the batteries.
When storing a battery, make sure it is at least 75% charged
to prevent the possibility of freezing.
Follow your battery dealer’s recommendations.
Battery Disconnect Switch
See Figure 7-2 in the following procedure.
The battery disconnect switch is provided on the right side
enclosure, near the coolant filter and engine node. Use the
switch to disconnect the batteries when servicing the
electrical control system. Turn switch handle clockwise to
disconnect the batteries for crane maintenance. In the
disconnect position the handle can be removed from the
switch.
See Section 3 of Crane Operator Manual for operation of
the battery disconnect switch
50 1.200 2.04
25 1.170 2.01
Discharged 1.110 1.95
% Charge Specific Gravity
Approximate
Open Circuit
Cell Voltage
CAUTION
Engine Damage!
To avoid possible engine fault codes and undesirable
operation, make sure engine ignition switch has been off
five minutes before disconnecting batteries.
Do not rely on this switch to protect crane’s electronic
systems when welding. Disconnect battery cables at
batteries before welding.
FIGURE 7-2
Right Side of Rotating Bed
Battery
Disconnect
Switch
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