SEAL-PIN 1990659 - Caterpillar

Type 1
Illustration 1 g01408559
6V-2317 Bolt (A) 30 mm (1.18 inch)
Illustration 2 g01408564
204-0712 Bolt (B) 30 mm (1.18 inch)The two bolts that are Type 1 are 30 mm (1.18 inch) long. Marks on the head of the bolt represent the grade of the bolt. These markings can be seen in Illustration 1 and Illustration 2. The 6V-2317 Bolt is being replaced by 204-0712 Bolt . The 204-0712 Bolt has a torque value of 40 8 N m (30 6 lb ft). 13 bolts are required for the installation of the front housing.Note: Check availability of the kit which includes the gasket and the bolts.Type 2
Illustration 3 g01408555
6V-5219 Bolt (C) 40 mm (1.57 inch)The 6V-5219 Bolt is 10 mm (0.39 inch) longer than the 204-0712 Bolt . The longer bolt is needed due to a deeper counterbore and the tapped hole. Do Not use the 204-0712 Bolt or the 6V-2317 Bolt . This could result in damage to the threads. The torque on the 6V-5219 Bolt bolt is 35 8 N m (26 6 lb ft). 13 bolts are required for the installation of the front housing.Remanufactured Engines
Illustration 4 g00838008
Depth of counterbore (Y) requires engines to use 204-0712 Bolt .
Illustration 5 g00838007
Depth of counterbore (Z) requires engines to use 6V-5219 Bolt .Remanufactured engines require special attention in order to use the correct bolt. The counterbore in the engine block must be measured in order to determine the bolts that will be used. If your engine block has a counterbore (Y) of 5 mm (0.20 inch), refer to "Type 1". If your engine block has a counterbore (Z) of 15 mm (0.60 inch), refer to "Type 2".
Table 2
Dimension     Counterbore Depth     Bolt    
Y    
5 mm (0.20 inch)     204-0712 (Type 1)    
Z    
15 mm (0.60 inch)     6V-5219 (Type 2)    
Illustration 6 g01301899
Typical example (1) Bolt Tighten the bolts to the following torque. ... 35 8 N m (26 6 lb ft) (2) Bolt Tighten the 204-0712 Bolt 30 mm (1.18 inch) in length to the following torque. ... 40 8 N m (30 6 lb ft) Tighten the 6V-5219 Bolt to the following torque. ... 35 8 N m (26 6 lb ft) (3) O-ring seal and crankshaft front sealThe O-ring seal and the crankshaft front seal are part of the front housing. Lubricate the O-ring seal lightly. Use the lubricant that is being sealed. (4) Accessory drive assembly
Illustration 7 g00837947
View A-A (A) The dowel extends past the surface of the housing by the following distance. ... 5.0 0.5 mm (0.20 0.02 inch)
Illustration 8 g00837952
View B-B (B) The dowel extends past the surface of the housing by the following distance. ... 10.0 0.5 mm (0.39 0.02 inch)Note: Apply 8T-9022 Silicone Gasket in order to fill the space at the connecting joint of the front housing, the engine oil pan, and the cylinder block.