HOUSING 2P7339 - Caterpillar

Illustration 1.Use Of The FT1525 Alignment Pin And FT1526 Fixture
1. Remove the seal from the governor shaft counterbore. Remove the gasket from the base of the governor housing. Then, use a file or emery cloth to remove any nicks or burrs from the base. See Illustration 2.
Illustration 2.2. Put the FT1526 Fixture in a vise, and install the governor housing on the fixture as shown in Illustration 3. Fasten the governor housing to the fixture with four bolts used to hold the governor housing to the fuel pump. Finger tighten the bolts.
Illustration 3.3. Loosen the two bolts that hold the bushing plate to the base of the FT1526 Fixture. See Illustration 4. Install the FT1525 Alignment Pin through liner in the bushing plate and into the governor housing as shown in the Illustration.
Illustration 4.4. With the FT1525 Alignment Pin fully installed, tighten the bolts in the bushing plate and the bolts on the governor housing. Make sure the FT1525 Alignment Pin can be turned freely after the bolts are tightened.5. Install the drill guide bushing into the fixture. Use a 12.7 mm (.5") drive drill and either an 18.25 mm or a 23/32" bit to drill the bore to 18.26 mm (.719"). See Illustration 5.
Illustration 5.6. Install the reamer guide bushing in the fixture. Install an 18.80 + 0.000 - 0.005 mm (.7405 + .0000 - .0005") reamer in the drill. The reamer must have a flute length of 76.2 mm (3"). Before selection of a reamer, measure across the opposite cutting edges to make sure you have the correct size reamer.Put a half and half mixture of SAE 30 motor oil and kerosene on the reamer and in the bore for lubrication.
Push the reamer slowly and smoothly through the bore to make it 18.82 0.013 mm (.741 .0005"). See Illustration 6. The lubricant, speed and feed of the reamer will have a direct effect on the size of the bore.
Illustration 6.7. Remove the governor housing from the FT1526 Fixture. Clean the lubricant and debris off the housing, and make sure the fuel drain hole, shown in Illustration 7, is clean.
Illustration 7.8. Put the 8N3945 Bushing on the FT1525 Alignment Pin as shown in Illustration 8. Make sure the taper on the bushing is toward the inside of the housing.
Illustration 8.Drive the bushing into the bore until the bushing is even with the cast counterbore. A 1P510 Driver Group may be necessary to push the 8N3945 Bushing into its seat.