2011/08/09 Caterpillar

Generator Set:

3406C GEN SET (S/N: C2G1-UP; C5G1-UP; C8G1-UP; 9ES1-UP; LRX1-UP)

3406E GEN SET (S/N: 8AZ1-UP)

3456 GEN SET (S/N: CCB1-UP; C1G1-UP; C3G1-UP; C4G1-UP; CAH1-UP; C2T1-UP; CBX1-UP)

C15 GEN SET (S/N: C5E1-UP; STG1-UP; C5H1-UP; C5L1-UP; NKL1-UP; X4R1-UP; CYY1-UP)

C18 GEN SET (S/N: C6C1-UP; G4C1-UP; N1C1-UP; N1D1-UP; STD1-UP; DKE1-UP; NKK1-UP; STM1-UP; EKW1-UP)

Power Module:

PM3456 (S/N: B3G1-UP)

Perform the following steps at the beginning of the commissioning process after the installation of the generator set. Periodically repeat this procedure throughout the operational life of the generator set.

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Illustration 1	g02605478
Measuring tool

1. Use a long-stemmed screwdriver to construct a measuring tool. Mark the measuring tool with a measurement pattern like a ruler. Refer to Illustration 1.

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Illustration 2	g02605497
Checking the clearance between the fan blade tips and the shroud.

2. Use the measuring tool to verify that the clearance between the fan and the shroud is evenly spaced completely around the circumference of the fan.

3. Check the clearance at the 2, 5, 8, and 11 o'clock positions. Check the clearance at a point nearest to the tip of the fan blade at those positions.

4. Use the following steps to adjust the shroud as needed.

   1. Loosen the bolts on each side of the radiator.

   2. Loosen the bolts on the top and the bottom of the shroud.

   3. Raise or lower the shroud as needed.

   4. Retighten the all the bolts.

5. Use the measuring tool to confirm that the measurement of spacing between the fan blades, the radiator, and the guard, both fore and aft, is greater than 45 mm (1.8 inch)45mm.

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Illustration 3	g02670160
144-0235 Belt Tension Gauge

6. Use 144-0235 Belt Tension Gauge and the 7N-9693 Tension Chart in the following Specifications manuals to verify belt tension:
   • For 3406E and 3456 generator setsuse Specifications, RENR2302

   • For 3406C Generator Sets use Specifications, RENR1293

   • For C15 and C18 Generator Sets use Specifications, SENR9707

   Note: Be sure to remember to check the fan belt tension periodically.