PUMP GP-PISTON 3967171 - Caterpillar

MEASURING SPECIFIC GRAVITY4. If there is more than .050 (50 gravity points) variation between the highest and lowest reading, the battery should be replaced.5. Adjust the readings to 80°F (27°C).a. For every 10F° (5.5C°) the electrolyte temperature is above 80°F (27°C), add .004 (4 gravity points) to the specific gravity reading.Example: Electrolyte temperature = 100°F; 38°C Corrected temperature = 80°F; 27°CDifference: = 20°F; 11°CIncrements: 10; 5.520 ÷ 10 = 2; 11 ÷ 5.5 = 22 × 4 gravity points = 8 gravity pointsAdd 8 gravity points to your hydrometer reading to obtain the adjusted reading at 100°F. If the uncorrected hydrometer is 1.240 the corrected reading would be: 1.240 + 8, or 1.248 b. For every 10F° (5.5C°) the electrolyte temperature is below 80°F (27°C), subtract .004 (4 gravity points) from the specific gravity reading.Example: Electrolyte Temperature = 10°F; -13°C Corrected temperature = 80°F; 27°CDifference = 70°F; 40°CIncrements: 10; 5.570 ÷ 10 = 7; 40 ÷ 5.5 = 77 × 4 gravity points = 28 gravity pointsIf the uncorrected hydrometer reading is 1.210 the corrected reading would be 1.210 - 28 = 1.182The corrected reading is of most importance during cold weather when the hydrometer reading is always corrected to a lower specific gravity reading. A low reading signifies the battery has less available power to crank the engine and that booster batteries may be required.Checking Electrolyte Level
Check the electrolyte level of each cell and the general condition of the battery.1. Maintain the electrolyte level to the base of each vent well.2. The make-up water must be one of the following (in order of preference): a. Distilled water.b. Odorless, tasteless drinking water.c. Iron free water.d. Any available water.
Never add acid or electrolyte.
Reading The Ammeter
1. After starting the engine, the ammeter indicator should register to the right of zero, but should never be "pegged".2. After the engine has been running, the indicator should be just to the right of zero.If the indicator either "pegs" to the right, or remains to the left of zero with an increase of engine speed, have the electrical charging system checked.The alternator charging rate maintains the battery's electrolyte specific gravity reading, and the battery's performance. An undercharge rate cannot maintain a desired 1.250 specific gravity reading. An overcharge rate will boil the water from the electrolyte solution. A proper charging rate should require no more than one ounce (30 cc) of water per cell per week to maintain a fully charged battery.Cleaning Battery
1. Mix a weak solution of baking soda and water. Apply the solution with a bristle brush.
CLEANING BATTERY TERMINALS2. Thoroughly rinse the battery and battery tray with clean water.3. Apply grease to the battery cable clamps and terminals and to all threads.Cold Weather Battery Maintenance
The following instructions aid in obtaining maximum performance in cold weather:1. After adding make-up water, charge the battery. The added water will dilute the electrolyte. This will lower the specific gravity of the solution, raise the freezing point of the solution and lower the charge of the battery.
CHARGING