The Automobile Storage Battery Part 69

9. Good supply of battery parts consisting of: KXG-13 Gla.s.s jars KXG-13 Pilot jars KXG-13 Positive groups KXG-13 Negative groups KXG-13 Round rods KXG-13 Vent plugs Sealing nuts Rubber gaskets Wood separators KXG-13 Rubber covers KXG-7 Round rods Lead pins Carboy electrolyte (including retainer).

KXG-7 Pilot jars KXG-7 Gla.s.s jars KXG-7 Positive groups KXG-7 Negative groups Outside negative plates KXG-7 Rubber covers Emergency repair straps

Disa.s.sembling a Cell

The gla.s.s jar battery covers are sealed to the jars by sealing compound, which may be softened very easily with a blow-torch.

When a blow-torch or an open flame is used for softening the sealing compound, the vent plug MUST be removed before applying a flame. It is also important to blow into the vent after the plug has been removed in order to expel any gas that may have collected in the s.p.a.ce above the electrolyte in the cell.

If the gas is held in place by leaving the vent plug in, it is apt to explode when an open flame or intense heat is applied to the cover.,

Removing covers may be greatly facilitated by suspending the cell by the terminals, as shown in Fig. 305. Care should be taken to make this suspension so that the bottom of the jar will not be more than two inches above the table. A pad of excelsior should be placed under it to avoid breaking the gla.s.s jar when it drops.

[Fig. 305 Softening sealing compound, Delco-Light cell]

After the sealing compound has been sufficiently softened, the cover may be loosened by inserting a hot putty knife, as shown in Fig. 306, There is no danger of breaking the cover by this operation if the cover has been sufficiently warmed. After the jar of electrolyte has dropped, the element should be removed from the jar and carefully placed across the top of it, so that the solution upon the plates will drain back into the jar. (See Fig. 307.)

[Fig. 306 Removing Delco-Light cell cover]

[Fig. 307 Draining element, Delco-Light cell]

[Fig. 308 Removing cover of Delco-Light cell]

[Fig. 309 Removing lock pin, Delco-Light cell]

After element has drained, place on wooden blocks, as shown in Fig.

308, and remove cover. Clean the sealing compound from the cover and jar immediately with a putty knife. Turn element upside down with posts through holes in bench and remove lead pin and rubber b.u.mper and withdraw, lock pin. (Fig. 309.) The separators may then be withdrawn from the group. (Fig. 310.)

[Fig. 310 Removing separatots, Delco-Light cell]

[Fig. 311 a.s.sembling separators, Delco-Light cell]

a.s.sembling

Place the positive and negative groups upside down with posts through holes in bench and slide in separators. The wood and rubber separators are inserted as follows: The rubber separator is placed against the grooved side of the wood separator, and the two are then slipped between the negative and positive plates with the rubber separator next to the positive plate. (See Fig. 311.)

Inserting Locking Pin

A rubber b.u.mper is pinned on one end of the lock pin by means of a lead pin, and the lock pin is then slipped into place with the lock pin insulating washer placed between the outside negative plates and the wood separators. (See Fig. 312.)

A rubber b.u.mper is then slipped over the other end of the lock pin and secured by a lead pin.

Place element on wooden blocks and fasten cover, as shown in Fig. 313.

[Fig. 313 Fastening cover, Delco-Light cell]

[Fig. 314 Preparing cover for sealing, Delco-Light cell]

Sealing Covers

Be sure all old sealing compound and traces of electrolyte are removed from the cover. Heat sealing compound until it can be handled like putty, roll out into a strip about 1/2 inch in diameter, place strip of compound around inside edge of cover (Fig. 314) and heat to melting point with blow-torch. The top of jar should also be heated to insure a tight seal. Compound can be melted in a suitable vessel and a 1/2 inch strip poured around cover.

When sealing compound and jar have been heated sufficiently, turn jar upside down (Fig. 315) and carefully place jar over element and press gently into compound. (Do not press hard.) Immediately place jar and element upright, and press cover firmly into place. (Press hard.) Finally, tighten sealing nuts. The cell is now ready for the electrolyte.

[Fig. 315 Sealing jar of Delco-Light cell]

Filling Cell with Electrolyte

Repaired cells should be filled with electrolyte of 1.200 specific gravity, or with water, as the case may require.

Standard Delco-Light electrolyte of 1.220 specific gravity may be purchased from the Delco Light distributor. The 1.220 electrolyte should be reduced to 1.200 by adding a very small amount of distilled water. This should be thoroughly mixed by pouring the solution from one battery jar into another. The 1.200 specific gravity electrolyte may then be added to the newly a.s.sembled cell until flush with the water line.

Charging

The completed KXG-13 cell should be placed on a 12-ampere charge and kept on charge until maximum gravity has been reached. A KXG-7 cell should be charged at a 6-ampere rate.

Adjusting Gravity of Electrolyte

If the maximum gravity is above 1.220, draw off some of the electrolyte and refill to water line with distilled water. The charge should then be continued for at least one hour to thoroughly mix the electrolyte before taking another hydrometer reading. It may be necessary to repeat this operation.

If the maximum gravity is below 1.220, pour off the electrolyte into a gla.s.s jar or a suitable receptacle, and then refill the cell with 1.220 electrolyte. Charge for one hour to thoroughly mix the solution before checking readings.

NOTE: Gravity readings in adjusting the electrolyte should always be taken in connection with thermometer readings, making necessary temperature corrections. This is particularly important in adjusting electrolyte in pilot cells.

HOW TO REPAIR DELCO-LIGHT CELLS

Treating Broken Cells

Whenever a shipment of batteries is received in which any of the jars have been broken, the first thing to do is to carefully remove the elements from the broken jars to prevent damage to the plates or separators. These elements should be placed in distilled water to prevent further drying. The plates will not be damaged in any way and can be restored to a healthy condition by charging in 1.200 specific gravity at a 12-ampere rate for the 13-plate cell or, 6-ampere rate for the 7-plate cell, until maximum gravity is reached. (See Charging and Adjustment of Electrolyte, explained on page 481.)

Treating Spilled Cells