1988/12/12 Caterpillar


Revised Instructions For Installation of New Maintenance Free Batteries{1401,1400}

Usage:


Reference: Special Instruction SEHS7633-01, "Battery Test Procedure", Page 8.

Two major changes are now in effect regarding installing a new maintenance free battery. Add a note to the referenced Special Instructions referring to this article. These two changes are:

... Do NOT sell a battery as a new battery if its open circuit voltage (OCV) is less than 12.00 volts.

All activated batteries slowly self-discharge while in stock at a rate closely related to ambient temperature. As the storage temperature increases, the rate of discharge increases. If, however, during storage the OCV has been allowed to fall below 12.00 volts, the batteries should NOT be sold as new and supported with warranty. The reason is the internal effect (sulfation and grid corrosion) of being in a low state of charge for a long period of time. Avoid this by stock turnover, especially when storage temperatures exceed 27°C (80°F).

... New charging rates and times.

These have been changed because Caterpillar no longer recommends boost charging, and the previous recommendations were insufficient for all instances where the OCV had fallen below 12.40 volts. Recharge at the rates and times shown in Step 4 of the following instructions.

NOTE: Whenever measuring the OCV, always use a digital type voltmeter such as 6V7070 or 6V7800 Multimeter to ensure the required accuracy. A moving coil-type voltmeter does not have sufficient accuracy.

These two new recommendations are applied by using the procedure in the following topic.

Using The New Recommendations

A new maintenance-free battery can normally be installed in a machine without charging and load testing. However, if a battery has been in storage for a long time, it can be partially discharged. Do the following steps before installing a maintenance free battery.

1. Measure open circuit voltage with a 6V7070 Multimeter with the selector on the 20 volt DC scale.

2. If open circuit voltage is 12.40 volts or more, the battery can be installed.

3. If open circuit voltage is less than 12.00 volts, do NOT sell the battery as a new battery.

4. If open circuit voltage is 12.00 to 12.39 volts, charge the battery. Select the amps charge rate and the charging time from the following tables.


NOTICE

During charging, on-charge voltage must not exceed 16.0 volts. In order to keep on-charge voltage below 16.0 volts, charging amps may need to be reduced near the end of charging.


5. After charging, load test the battery at one-half the cold cranking amp (CCA) rating of the battery. Refer to PEKP9100 for CCA rating. If the voltage at 15 seconds is 9.5 volts or more, install the battery. If the voltage at 15 seconds is less than 9.5 volts, do NOT sell the battery as a new battery.

Caterpillar Information System:

1988/12/05 Operation Of Feeder Sensor Control{8216}
1988/12/05 Improved Air Conditioner Thermostat Switches Have Tin-Plated Internal Parts{7320}
1988/12/05 Hydraulic Pressure Settings For Backhoe Loaders{5050,5450}
1988/12/05 Improved Coupler Pin Helps Prevent Cylinder Rod Bending{6129}
1988/12/05 New Air Tank Drain Valve Used{4250,4272}
1988/11/28 More Charts And Decals Available For Lubrication And Maintenance Intervals {0374,0375,7500}
1988/11/28 Stronger, Longer Ring Gear Retainers For Final Drives {4054,4084}
1988/11/28 Improved Wheel And Longer Bolts Provide Better Retention Of Front Brake Disc {4255,4201}
1988/11/28 New Mounting Pin Assemblies For Blade Tip Cylinder {5106}
1988/11/21 One-Piece Tappet (Follower) Used In 11 mm (Type 2) Fuel Injectors{1290}
1988/11/21 New Oil Seal For Water Pumps Has Hydrodynamic Grooves{1361,1389}
1988/11/21 Improved Pressure Gauge Sender Used{7450,7485}
1988/12/12 New Operator Monitor Group Used{7490}
1988/12/12 Parts Needed If Air Compressor Tubes Replaced{4257,1803}
1988/12/12 New Switch For Back-Up Alarm{7406}
1988/12/12 New Solenoid Valve For Rotor Lift System{8245}
1988/12/12 New Mounting Bolts Used In Aftercooler Housings{1063,1058}
1988/12/12 Maintenance Procedure Extends Service Life Of Exhaust Manifold Studs{1050}
1988/12/12 New Alternator Drive Pulley Has Hardened Wear Sleeve; New Seal Used On Pulley{1425,1357}
1988/12/12 Oil Cooler Bypass Elbow Changed To Prevent Bypass Valve Seizure{1314,1318}
1988/12/19 New Material Used For Rotating Seal Rings In Some Power Shift Transmissions, Steering Clutches And Torque Converters {3101,3150,4100}
1988/12/19 Cold Weather Readiness Checks {1456,1250}
1988/12/19 New Circle Drive Gerotor Motor Groups Provide Higher Torque To Circle Drive {5082}
1988/12/19 New Brake Disc Assemblies, Axle Lubricant Reduce Brake Chatter {3278,4255}
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