SEAL-O-RING 1438729 - Caterpillar

Boom (2)
Illustration 14 g03407489
Section P-P
Table 14
Item Qty Part Specification Description
- Lubricate the O-rings seal and backup rings lightly with the lubricant that is being sealed.
68 1 153-5276 Special Bolt Before assembly, apply red Loctite 271 to the threads.
Torque to 50.0 to 59.8 N m (36.9 to 44.1 lb ft).
69 1 250-2446 Plug Torque to 240 to 260 N m (177 to 192 lb ft).
70 1 352-7058 Spring Length under test force is 55.5 mm (2.19 inch).
Test force is 594.1 29.7 N (133.6 6.7 lb).
Free length after test is 62.27 mm (2.452 inch).
71 2 4T-3148 Spring Length under test force is 24.0 mm (0.94 inch).
Test force is 4.0 2.2 N (0.9 0.5 lb).
Free length after test is 34.80 mm (1.370 inch).
72 1 225-4818 Plug As Torque to 5.0 1.5 N m (44.3 13.3 lb in).
73 1 158-8177 Spring Length under test force is 61.3 mm (2.41 inch).
Test force is 163.8 8.2 N (36.8 1.8 lb).
Free length after test is 67.60 mm (2.661 inch).
74 1 158-8186 Spring Length under test force is 34.0 mm (1.34 inch).
Test force is 2.63 0.34 N (0.60 0.08 lb).
Free length after test is 41.4 mm (1.63 inch). Negative Flow Control (Left Side)
Illustration 15 g03407490
Section R-R
Table 15
Item Qty Part Specification Description
75 1 147-4161 Relief Valve Gp Torque to 145 15 N m (107 11 lb ft).
76 1 107-6370 Spring Length under test force is 44.0 mm (1.73 inch).
Test force is 565.3 45.2 N (127.1 10.2 lb).
Free length after test is 49.3 mm (1.94 inch).
77 As required, Use the following shims:
5 4J-7386 Shim Thickness is 0.25 mm (0.010 inch).
1 4J-7385 Shim Thickness is 1.22 mm (0.048 inch).