TM 9-6140-200-14
NOTE
Do not mix vented and sealed lead-acid batteries in one vehicle,
When replacing all open lead-acid batteries with Sealed Lead Acid
batteries replace as a set. Do not mix.
Since the sealed lead-acid battery's is " maintenance free" its periods
between inspection are longer. It is necessary to clean the battery
compartment and carefully make the electrical connections before
installing sealed lead-acid batteries.
The same applies to accurate adjustment of the voltage regulator;
The voltage regulator must operate in the band applicable to the
vehicle or equipment concerned. The aim should be to attain the
lower voltage tolerance limit (see equipment TM).
Do not believe that increasing the voltage brings any advantages.
Quite the opposite is true. The batteries will be over-charged or fail
prematurely.
5. When open lead-acid batteries are to be replaced by sealed lead-acid batteries,
carry out the following action in the order given.
a. Remove open lead-acid batteries; check with lead-acid battery tester (item
20 or 22, Appx. B) to determine whether they are suitable for other possible
uses.
b. Use the same voltage values to assess criteria for corresponding types of
battery.
c. Thoroughly clean the battery compartment and hold downs. Repair or
replace any damaged parts. Thoroughly clean and remove any residual
grease.
6. Put the sealed lead-acid batteries into operation (see paragraph 5-1).
7. Install the sealed lead-acid batteries.
5-4
