DRESSTA TD-25M EXTRA, Service Manual

Page: 314 / 595

SECTION 8
ELECTRICAL
Page 38
TD-25M EXTRA DRESSTA
BATTERY
Batteries in stock should be recharged when the stabilized voltage falls to 12.2 [V] or specific
gravity drops below 1.240. If good stock rotation and inventory control have been maintained, the
battery may be installed without charging. However, if the battery stabilized voltage is less than
12.2 [V] it should be recharged before installation.
16. BATTERY PRIMERY RATINGS
Battery ratings include: Cranking Performance Amperes (CRANKING AMPS @ 32
°
F),
Cold Cranking Amperes (CCA) and Reserve Capacity (RC).
1. Cranking Performance Amperes (CRANKING AMPS @ 32
°
F)
The Cranking Performance Amperes is the discharge load in amperes that a new, fully charged
battery operating at 0 [
°
C] (32
°
F) can deliver for 30 seconds and maintain a voltage
above 7.2 [V].
2. Cold Cranking Amperes (CCA)
The Cold Cranking Amperes is the discharge load in amperes that a new, fully charged battery
operating at -17.8 [
°
C] can deliver for 30 seconds and maintain a voltage above 7.2 [V].
3. Reserve Capacity (RC)
The Reserve Capacity Rating is the number of minutes a new, fully charged battery at 26.7 [
°
C]
can be discharged at 25 [A] until its voltage drops below 10.5 [V].
17. COLD ENGINE CRANKING PERFORMANCE
Effect of temperature and oil viscosity on ENGINE CRANKING PERFORMANCE
1. Battery capacity is greatly reduced by cold. The reduction in cranking power when the
temperature drops from 26.7 [
°
C] to 0 [
°
C] is 65 [%] or -18 [
°
C] is 40 [%].
2. Stiff engine oil adds to the load of starting. With the use of single-viscosity winter-grade
SAE 20W oil the cranking power requirement rises about 2-1/2 times on the drop in temperature
from 27 [
°
C] to -18 [
°
C]. Note that a nearly-discharged battery at -18 [
°
C] has less than 1/10 the
available cranking power of a fully charged battery at 27 [
°
C].
18. DRY CHARGE ACTIVATION
1. Before attempting to activate a battery read and understand the SAFETY PRECAUTIONS in this
chapter.
2. Battery and acid must be at a temperature of 15 [
°
C] to 38 [
°
C] at time of filling.
3. Remove the plugs and fill each cell to level 21 - 27 [mm] above the top edge plates. Electrolyte
gravity should be 1.265
±
0.005 at temperature 27 [
°
C].
4. Wait for minimum 20 minutes to soake plates. Add additional electrolyte to proper level.
It is recommended wait for 3 hours after filling of battery.
5. Charge battery no more than 7 [A] for 30 minutes. Battery is ready if specific gravity is 1.250
or more at temperature 15.5 [
°
C].
6. Check electrolyte level and add distillated water if need.