SEAL (Fire Resistant) 9J1325 - Caterpillar

Using 6V6106 Dial Indicator With A Reduced Calibration Dimension
For this method, put a 1U8815 Contact Point on the stem of the dial indicator. With the governor installed on the calibration bench, fasten the dial indicator to the indicator bracket. See illustration.
Governor and dial indicator installed on the test bench.Adjust the position of the dial indicator on its bracket so the indicator reads 6.00 mm on the dial face. (Step 13 in the referenced Special Instruction specifies "8.00 mm" for other governors.) Tighten the dial indicator face screw to lock the indicator in position.
The 6.00 mm dimension now becomes the reference point for all other adjustments made on the calibration bench. Since this 6.00 mm reference point is 2.00 mm LESS than the "8.00 mm" specified in the Special Instruction, ALL other governor output dimensions specified in the Special Instruction must be REDUCED by 2.00 mm when using this modified method.
Using The Programmable 1U8869 Digital Indicator
1. Preset the indicator before it is installed on the calibration bench by setting the indicator to reverse modes. This allows the indicator to display lower values as the stem is pushed in.2. Preset indicator to 8.00 mm as described in the indicator Operation Manual. Then, set it on zero ("zero" the indicator).3. Install a flat end contact stem, AL24 from Federal Products ®. This stem is 22.3 mm (.878") long.4. Install indicator on the indicator bracket.5. Set the indicator to minus 3.00 (minus 0.00 + 0.25) mm, and tighten the screw that locks the indicator on its bracket.6. Push the indicator preset button twice. Indicator should read 8.00 mm.7. Proceed with the checking or adjusting procedure in the Special Instruction.