SEAL-ROD 1049658 - Caterpillar

Illustration 1 g00505699
Illustration 2 g00505747
Connect terminal (1) to a 27 0.3 volt power supply. Connect terminal (2) to the test resistance (rheostat). Use an ohmmeter across the test resistance in order to verify the settings of the test resistance. Connect terminal (3) to ground.
Warm the gauge for a minimum of five minutes before testing the gauge.
Test and check the gauge at each pointer position. Refer to table 1.
If the gauge does not indicate the correct pointer position that is within the range of each test resistance, replace the gauge.
Table 1
Calibration Chart    
Pointer Position     Test Resistance     Direction of pointer travel    
0 kPa (0 psi)     240 + 19 - 15     Counterclockwise    
100 kPa (15 psi)     172 4     Counterclockwise    
550 kPa (80 psi)     34 7     Clockwise