PUMP G. 3S8798 - Caterpillar

Field Modification Procedure
Loosen the four screws that go through the front keypad so that the device comes apart.
Remove the three batteries.
Remove the three small screws that fasten the circuit board to the front keypad plate. Do NOT LOSE these screws.
Find the location of the resistor "R11B" on the display side of the circuit board. "R11B" is on the lower left corner of the circuit board. Use small wire cutters to carefully cut the leads at each end of the resistor "R11B". Use care not to damage the resistor "R11C". Resistor "R11C" is located immediately above resistor "R11B".
Use the three small screws that were retained in Step 3 to install the circuit board on the keypad plate.
Install three new batteries. The following batteries are recommended: Duracell PX28L, Sanyo 2CR-1/3N and Altronic 601258. Take note of the battery polarity during installation.
Reassemble the pyrometer and install the four screws that were removed in Step 2.