PIN-JAW 9U6264 - Caterpillar

11/00/91Engine News, May 1991, Page 3, "Simplified Battery Testing Procedure SEHS7633-02 And Battery Test Sheet SEHS9326 Available".In COSA, use form G1052 only for testing batteries in accordance with Special Instruction SEHS7633-02. This was announced in the COSA General Letter, CSD No. 12 dated May 15, 1990. DO NOT use form SEHS9326.
Paragraph 3 and 4 of the article refer to an Open Circuit Voltage (OCV) of 12.40 as having sufficient charge to use, sell or load test the battery. This is correct providing it is a stabilized voltage. If the OCV was measured shortly after recharging, invariably the reading will be falsely high due to a surface charge on the plates. Remove the surface charge as described in Special Instruction SEHS7633-02 by applying a load of half the cold cranking amperes (cca) rating for 5 seconds. Allow the battery to recover and measure the OCV. If the OCV recovers to 12.40 or more, the battery can be put into use or load tested. If it does not, further charge the battery.
Always use a digital voltmeter for all battery voltage checks. If testing 8 or 6 volt batteries, the equivalent OCV is 8.27 and 6.20 volts respectively.--------------- END SUPPLEMENT ---------------Reference: Special Instructions: SEHS7633-02, "Battery Test Procedure" and SEHS9326, "Battery Test Sheet". (IRM): PELE0187, BAT 91-4, "Simplified Battery Test Procedure"; PELE0172, BAT 90-7, "New Battery Test Tool Available"; PELE0178, BAT 90-9A, "New Battery Load Tester".
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