Batteries And Charging Systems - MTD Garden Tractors User Manual

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BATTERIES AND CHARGING SYSTEMS

2-6. GENERAL.
2-6.1 The main storage or electrical power in our
electric start lawn mowers, riders and tractors
is the battery. With proper setup and mainte-
nance the battery will last for years. However,
in some remote cases even with proper main-
tenance a battery can lose power. This is
unavoidable and should be handled as per
warranty guidelines.
2-6.2 A chemical reaction between the battery's
electrolyte and plates, or electrodes, will sup-
ply electrical energy to an external circuit.
When the battery is being used, or discharg-
ing, the positive plate (lead dioxide) and the
negative plate (sponge lead) are both changed
to lead sulphate. At the same time, part of the
electrolyte (diluted sulfuric acid) is changed to
water. This conversion of diluted sulfuric acid
to water reduces the specific gravity of the
electrolyte. By measuring this specific gravity,
a direct measure of how far the discharge pro-
cess has progressed can be made.
2-7. BATTERIES AND CHARGING RATES.
2-7.1 There are basically 5 different batteries used.
In this section we will show the battery number,
the replacement number, cause of replace-
ment, size, cold cranking amps and amp hours
at a given rate.
1. Battery 725-0514A (Figure 2-2) is replaced by
725-1633. These batteries are used on riders
and are the same size with the same cold
cranking amps. The number was changed due
to shipping regulations which would not allow
acid packs to be shipped with batteries. Acid
packs can be obtained by ordering part num-
ber 725-1637; how-ever, we suggest dealer
obtain acid locally. Battery caps, part number
725-0691, can also be ordered separately.
2. Battery 725-0453A (Figure 2-3) is shipped with
no acid. Acid can be obtained by ordering part
number 725-1637, but it is suggested acid be
purchased locally. Battery caps can also be
purchased separately by ordering part number
725-0690. Battery 725-0453A was used on
1989 and prior 700 and 800 series tractors.
This battery is currently used in the 900 series
tractor.
www.mymowerparts.com
3. Battery 725-1105 which was supplied in 1987
is no longer available. Use kit number 753-
0459 as a replacement. The kit includes a bat-
tery, cover and adapting clip. The larger termi-
nal end goes on the negative side of the
battery. The adapting clip also goes on the
negative side. The electric start unit uses a 7
amp fuse system.
4. Battery pack 725-1276 (Figure 2-4) is installed
in electric lawn mowers.
2-2