Manitowoc 2250 Service Maintenance Manual

Reference Only
Manitowoc Published 07-19-16, Control # 249-01 7-3
2250 SERVICE/MAINTENANCE MANUAL POWER TRAIN
7
NOTE: Detailed test information is provided by the meter
manufacturer.
High Resistance Test
A voltage drop (while cranking) of more than 0.2 V between
the starting motor cable and ground can result in 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 battery posts and terminals. The posts can be
lightly coated with grease to prevent corrosion.
4. Make sure the hold-downs are in good condition and
replace any faulty parts.
5. Replace frayed, broken, or corroded cables.
6. Replace the batteries if their containers are cracked or
worn to the point at which they leak.
7. Ensure a good contact (tight) exists between the clamp
terminals and battery posts.
Make sure the hold-downs are tight enough to prevent
battery movement but not so tight as to cause distortion.
Charging
If at all possible, the battery should be at room temperature
when recharging. Before a battery is recharged, it must be
thoroughly cleaned. Do not 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 A 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 A.
If a battery was discharged rapidly (cranking until dead), it
can be recharged on a fast charger with an output of up to
40 A for a maximum of two hours. If the electrolyte
temperature reaches 52°C (125°F) or if it gasses violently,
the charging current must be reduced or halted to prevent
battery damage.
For optimum charging results, adhere to the charger
manufacturer’s instructions.
Storage
When a machine 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 7-1 for the following.
A battery disconnect switch is provided on the right side of
the upperworks, next to the batteries. Use the switch to
disconnect the batteries when servicing the electrical control
system.
See Section 3 of the Operator Manual for operation of the
battery disconnect switch.
Make sure the engine ignition switch has been off for five
minutes before disconnecting the batteries.
CAUTION
Electronic Damage!
To prevent possible engine fault codes and undesirable
operation, make sure the engine ignition switch has been
off for five minutes before disconnecting the batteries.
Do not rely on this switch to protect the crane’s electronic
systems when welding on the crane. Disconnect the
battery cables at the batteries before welding.
To
Disconnect
Right Side of Rotating Bed
P6734M
Shown in Connected (closed) Position
FIGURE 7-1

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English