Case 580SR Service Manual page 986

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7. BATTERY
For the loader backhoe models two different kinds of installation are provided:
Z with one battery.
Z with two batteries (for cold climates).
7.1 SPECIFICATIONS
Single battery
Voltage: ........................................................................................................................................................12 V
Capacity (20 h):..........................................................................................................................................95 Ah
Discharge current:......................................................................................................................................900 A
Weight with electrolyte: .............................................................................................................................. 25 kg
Double battery
Voltage: ........................................................................................................................................................12 V
Capacity (20 h):..........................................................................................................................................60 Ah
Discharge current:......................................................................................................................................600 A
Weight with electrolyte: .............................................................................................................................. 17 kg
7.2 DESCRIPTION AND OPERATION
All models feature one or two 12 volt, negative
ground, "maintenance free" lead calcium (Pb-Ca)
type battery, of six cell construction.
IMPORTANT: "Maintenance Free" means that un-
der normal charging conditions the battery does not
lose water from the electrolyte. Conditions that may
cause water loss include prolonged charging above
14.4 volts where gassing occurs as it approaches full
charge. This can be caused by a faulty charging sys-
tem or boost/recovery charging equipment.
The battery has four major functions:
Z To provide a source of current for starting, lighting
and instrumentation.
Z To help control the voltage in the electrical system.
Z To furnish current when the electrical demands ex-
ceed the alternator output.
Z To support quiescent loads from radio and micro
processor memory.
The battery is constructed in such a manner that
each cell contains positive and negative plates
placed alternatively next to each other. Each positive
plate is separated from a negative plate by a non
conducting porous envelope separator. If any of the
positive plates should make contact with negative
plates within a cell, the cell will short circuit and suffer
irreparable damage. All of the positive plates are
welded to a bus-bar, forming a positive terminal and
all of the negative plates are welded to a similar bus-
bar forming a negative terminal.
SECTION 55 - ELECTRICAL SYSTEM
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