797F and 797F XQ Off-Highway Truck Hydraulic System Caterpillar


Control Valve (Brake Cooling, Hoist)

Usage:

797F LAJ



Illustration 1g03745534

Table 1
Specification for 250-7621 Control Valve Gp    
Item     Qty     Part     Specification Description    
1     4     134-5004 Plug     Torque to 325 ± 33 N·m (240 ± 24 lb ft).    
2     2     4T-0935 Spring     Length under test force is
21.0 mm (0.83 inch).
Test force is
14.0 ± 1.1 N (3.1 ± 0.2 lb).
Free length after test is
33.0 mm (1.30 inch).    



Illustration 2g03745536

Section A-A

Table 2
Item     Qty     Part     Specification Description    
3     2     326-5212 Coil     Operating voltage is 24 VDC.
Resistance at
25 °C (77 °F) is 5.0 ± 0.3 Ohms.    
4     2     316-1438 Cartridge As     Torque to
35 ± 3 N·m (26 ± 2 lb ft).    
5     2     121-2051 Spring     Length under test force is
46.0 mm (1.81 inch).
Test force is
21.00 ± 0.63 N (4.72 ± 0.14 lb).
Free length after test is
53.53 mm (2.107 inch).    
6     2     198-2914 Nut     Torque to
20 ± 3 N·m (177 ± 27 lb in).    
7     2     177-1405 Spring     Length under test force is
8.20 mm (0.323 inch).
Test force is
18.41 ± 0.55 N (4.14 ± 0.12 lb).
Free length after test is
12.29 mm (0.484 inch).    
8     2     118-5087 Spring     Length under test force is
50.0 mm (1.97 inch).
Test force is
243 ± 19 N (55 ± 4 lb).
Free length after test is
63.5 mm (2.50 inch).    
9     2     118-5086 Spring     Length under test force is
55.0 mm (2.17 inch).
Test force is
438 ± 35 N (98 ± 8 lb).
Free length after test is
76.2 mm (3.00 inch).    

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