Corken 91 - Page 81

Appendix E—Parts Details for 491 and F491 Crankcase Assembly
Packing Assembly Bill of Materials
Ref
No.
Part No. Description Qty.
1. 4438 Oil seal 1
2. 7001-037NC075A Bolt (hex head, 3/8"-16 x 3/4") 4
2-1. 7001-031NC075A Bolt (hex head, 5/16"-18 x 3/4") 6
3. 2847-1 Bearing cover 1
4.
1504 Bearing adjustment shim (0.005")
As
needed
1504-1 Bearing adjustment shim (0.007")
As
needed
1504-2 Bearing adjustment shim (0.020")
As
needed
5. 1502 Bearing cup 1
6. 1508-X Oil bayonet 1
7. 1511 Crankcase inspection plate gasket 1
8. 2853 Crankcase inspection plate 1
9. 2-112A
O-ring (Buna-N, oil bayonet and
pump shaft)
2
10. 2803 Crankcase 1
11. 1279 Breather cap 1
12. 2-111A O-ring (Buna-N, breather cap) 1
13. 2796 Breather ball 1
14. 1450 Lock pin 1
15. 1663 Flywheel key 1
16. 1503 Bearing cone 1
17. 1499-X
Crankshaft assembly with 1284 (2),
1286, 1499, 1501, 1503, 2590
1
18. 1284 Crankcase orifice (2) 2
19. 1501 Bearing cone 1
20. 1286 Pump shaft drive pin 1
21. 2590 Pipe plug 2
22. 1280 Filter screw 1
23. 1281 Filter screen screw gasket 1
24. 2-116 A O-ring (Buna-N, filter screen) 1
25. 1276 Filter screen washer 1
26. 1275 Oil filter screen 1
27. 3289 Pipe plug 2
28. 1661 Plug (3/8" NPT) 1
29. 1290 Relief valve adjusting screw 1
30. 1291 Adjusting screw locknut 1
31. 2- 011A
O-ring (Buna-N, relief valve
adjusting screw)
1
32. 1292 Relief valve spring 1
33. 1293 Relief valve ball 1
34. 1500 Bearing cup 1
35. 2961-X
Air release valve assembly with
2961, 2962, 2963
1
36. 1513 Bearing carrier gasket 1
37. 2804 Bearing carrier 1
38. 2-218A O-ring (Buna-N, closure body, 2) 2
39 1515-X Closure cap assembly 1
40. 7001-025NC050A Bolt (hex head, 1/4"-20 x 1/2") 11
41. 1302 Oil pressure gauge 1
Ref
No.
Part No. Description Qty.
42. 2-228A O-ring (Buna-N, pump cover) 1
43. 4222-X Oil filter assembly (external) 1
44. 1629 Pipe plug (1/16" NPT, flush seal) 2
45. 7001-037NC100A Bolt (hex head, 3/8"-16 x 1") 6
46. 2805-X Pump shaft bushing 1
47. 2850 Pump shaft adapter 1
48. 2852 Oil pump spring 1
49. 2851 Spring guide 1
50. 2849-X
Oil pump assembly (individual
pump parts not available)
1
51. 2798 Pump cover pin with 4222 1
52. 4225 Oil filter 1
Assembly Number Assembly Name
1279-X Breather cap assembly with 1279, 2-111A
1499-SX
a
Extended crankshaft assembly with 1284 (2),
1286, 1499-S, 1501, 1503, 2590
1508-X1 Oil bayonet assembly with 1508-X, 2-112A
2804-X
Bearing carrier assembly with 1290, 1291, 1292,
1293, 1500, 1513, 1515-X, 1629 (2), 2590, 2804,
2849-X, 2850, 2851, 2852, 2961-X, 2-011A,
2-112A, 2-228A, 4222-X
2847-1X Bearing cover assembly with 2847-1, 4438
a
Optional equipment.
WARNING
CAUTION: Always relieve pressure in the unit before attempting
any repairs.
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