NUT-WELD 1599541 - Caterpillar

Remove Timing Gears
Start By:a. remove camshaft 1. Remove four bolts (1), thrust plate (2) and idler gear (3). 2. Use tooling (A) and a press to remove the bearing from idler gear (3). 3. Remove thrust washer (4), bolts (5) and shaft (6) from the cylinder block. 4. Use tooling (B) to remove gear (7) from the crankshaft.Install Timing Gears
1. Turn the crankshaft so dowel (2) in the crankshaft is up as shown.2. Heat crankshaft gear (1) to a maximum temperature of 233° C (451° F). Install crankshaft gear (1) on the crankshaft. Make sure the side of the gear with "V" timing mark (3) is out as shown. Make sure the groove (slot) in the crankshaft gear is in alignment with dowel (2) on the crankshaft. Make sure the crankshaft gear is in alignment with the idler gear for the oil pump on 3412 Generator Sets. On 3408 Generator Sets, the crankshaft gear must be in alignment with the oil pump gear. 3. Install shaft (4) and bolts (5). Put clean engine oil on thrust washer (6). Install thrust washer (6) on the shaft so that oil groove (7) is out, as shown. 4. Use tooling (A) and a press to install the bearing in the idler gear. Install the bearing so that the bearing joint is in the thick area of the gear [the area opposite surface (9)]. Install the bearing so that it is 0.38 0.25 mm (.015 .010 in.) below the surface on the side of the gear opposite surface (8).5. Put clean engine oil on the bore of bearing. 6. Install idler gear (10) on the shaft. Make sure "V" mark (11) on the idler gear is in alignment with the "V" mark on the crankshaft gear. Install thrust plate (12) so that the side of the thrust plate with oil groove (13) is toward the idler gear.7. Put clean engine oil on the side of the thrust plate that is next to the idler gear. Install thrust plate (12) and the four bolts that hold it in place.End By:a. install camshaft