CAUTION:  DO NOT ADD WATER UNLESS BATTERY IS FULLY CHARGED.
NOTE:  When pulsing ceases, charge will switch on high temperature mode and charge at approximately 1/2 to 2 amperes.
B.  Move BATTERY switch to OFF, disconnect battery from airplane system, and remove battery from battery shelf (Ref 24-31-11, R/I). Remove battery cover.
C.  Check electrolyte level.

(1)  
After battery is fully charged, wait 2 to 4 hours before checking electrolyte level. If time does not permit a 2 to 4 wait, check electrolyte level immediately after battery is fully charged.

(2)  
Insert polystrene tube into filler opening. Touch top of plastic insert with tube.

(3)  
Cover top of tube with index finger and remove tube from filler opening.

(4)  
Electrolyte level in bottom of tube should be 3/4 inch immediately after battery is fully charged or 5/8 inch 2 to 4 hours after battery is fully charged.

(5)  
Add distilled or demineralized water to bring electrolyte to proper level. Adjustments in electrolyte level may be made with a dropper or syringe. Measure water added to each cell. Do not overfill.

CAUTION:  DO NOT CHECK BATTERY OR ADD WATER TO BATTERY USING EQUIPMENT OR WATER CONTAMINATED WITH LEAD-ACID BATTERY ELECTROLYTE.
NOTE:  If more than 35 cubic centimeters or water per cell is being added during flight line servicing, the interval between services is too long. A cell that requires 45 or more cubic centimeters of water to bring to the required level should be suspected of being defective.
D.  Replace battery cell filler caps and battery cover, install and connect battery to airplane system (Ref 24-31-11, R/I).
CAUTION:  DO NOT LEAVE CELL FILLER CAPS OFF FOR EXTENDED PERIODS OF TIME AS BATTERY MAY BECOME CONTAMINATED.
E.  Repeat 3.A.(1) thru (4) to verify battery is properly connected and fully charged.
501 
24-31-11 Page 302  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 01/98 

STORAGE BATTERY (NICKEL-CADMIUM) - REMOVAL/INSTALLATION
1. General

A.  The battery is on a tray in the electronic equipment compartment to the right of the electronic compartment access door. The battery is vented to ambient by a louvered cover. A 115°F temperature switch is on right-hand side of the battery shelf (Fig. 401). Before installing the battery the temperature switch must be in the center of the mount so that the flat surface of the switch will contact the battery case.
2.  Remove Storage Battery (Nickel-Cadmium)
A.  Move battery switch on forward overhead panel to OFF position.
B.  Disconnect battery cable connection by loosening hand knob and lifting plug off terminal pins.
C.  Loosen and lower the two knurled hold-down knobs.
D.  Remove battery (with cover in place) in the battery holder.
E.  Loosen wing nuts and remove battery from battery holder.
3.  Install Storage Battery (Nickel-Cadmium)
A. Place battery (with cover in place) in battery holder and secure with wing nuts and T bolts.
CAUTION: ENSURE PROPER COVER ALIGNMENT. IMPROPER ALIGNMENT WILL
RESULT IN CELLS NOT BEING HELD DOWN PROPERLY.

BEFORE INSTALLING BATTERY, CHECK THAT TEMPERATURE SWITCH IS CENTERED IN MOUNT SO THAT FLAT SURFACE OF SWITCH WILL CONTACT BATTERY CASE WHEN BATTERY IS INSTALLED.
B.  Place battery in holder on battery tray, and slide battery into position against temperature switch (Fig. 401).
NOTE:  Switch may become cocked in mounting bracket. Check that flat heating surface of switch is against battery case.
C.  Swing the two knurled battery hold-down knobs up into position and tighten.
D.  Inspect battery connector for signs of arcing, pitting and corrosion. If signs exist, remove and replace connector.
NOTE: Pitted/corroded battery connector can cause excessive draining of the battery.
E.  Connect battery by pressing plug onto terminal pins and tightening hand knob.
F.  Deleted.

G.  Test battery by opening the input breaker for TR unit No. 3, setting battery switch to ON, turning dc meter selector switch on forward overhead panel (P5) to BAT and noting that dc voltmeter reads approximately 24 volts and dc ammeter reads the discharge current of the applied battery bus load. Restore all circuit breakers and note battery charging current on the dc ammeter if ac power is on the airplane buses.
H.  Set battery switch to OFF.
504 
Feb 01/96  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  24-31-11 Page 401 

H21466
 Battery Installation  500 
24-31-11  Figure 401  Feb 1/75 
　
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