PISTON 8S6187 - Caterpillar

Remove Front Drive Housing
start by:a) remove oil filter housingb) remove crankcase breatherc) remove front crankshaft seal and wear sleeved) remove accessory drive (front)e) remove governor drive Make sure there is a new front crankshaft seal and wear sleeve before the front drive housing is removed. Anytime the front seal is removed from the wear sleeve, a new seal and sleeve must be installed. 1. Remove oil tube (1) from the engine.2. Fasten a hoist to support (2) with tooling (A) and remove support (2) from the drive housing. The weight of the support is 102 kg (225 lb.). 3. Remove elbow (3) and tube (4) as a unit from the engine. 4. Remove the bolts and use tooling (B) to remove shaft (6) and idler gear (5) from the drive housing. 5. If necessary, use tooling (C) to remove the bearing from idler gear (5). 6. Remove washer (7) from the inside of the drive housing. 7. Remove bolt (9) and washer to remove clip (8) from the drive housing. 8. Remove cover (11) from the drive housing.9. Remove all of the bolts that hold the oil pan to the engine. Install 3/8"-16 NC guide bolts in each side of the oil pan. Fasten a hoist to the engine and lift the engine approximately 12 mm (0.5 in.) off of the oil pan. Put two 50 mm wide x 100 mm long x 6 mm thick (2 in. wide x 4 in. long x 1/4 in. thick) plates in position between the cylinder block and the oil pan on each side of the engine. Lower the engine on the plates and remove the hoist. The weight of the 3512 Engine is approximately 5443 kg (12,000 lb.). The weight of the 3508 Engine is 4445 kg (9800 lb.).
Fuel control linkage (10) must be moved for clearance to pull the front drive housing from the engine or damage to parts can be the result.
10. Fasten a hoist to front drive housing (12) with tooling (A). Remove bolts (13) and the remainder of the bolts that hold housing (12) in position. Remove front drive housing (12) from the engine. The weight of the housing is 209 kg (460 lb.).Install Front Drive Housing
1. Put the housing gasket in position on the front of the cylinder block. Install two 5/8"-11 NC guide bolts (1) in the cylinder block. 2. Fasten a hoist to front drive housing (2) with tooling (A). Put housing (2) in position on the guide bolts and install the bolts to hold it in position. Remove the guide bolts and install the remainder of the bolts. Tighten all of the bolts evenly and cut the housing gasket even with the bottom of the cylinder block.3. Fasten a hoist to the engine and lift the engine enough to remove the plates between the cylinder block and the oil pan. If the oil pan gasket is damaged, the engine will have to be removed from the oil pan to make a replacement