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521B and 522B Track Feller Bunchers Machine Systems Caterpillar


Main Control Valve (4-Bank) - High Flow) (Non-Tilt

Usage:

521B F7B

373-7704 Main Control Valve Gp

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Illustration 1g03431577

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Table 1
Specifications for 373-7704 Main Control Valve Gp 
Item  Qty  Part  Specification Description 
1  1  378-2539 Control Valve Gp  Inlet 
2  1  378-2541 Control Valve Gp  Accumulate 
3  1  381-1520 Control Valve Gp  Swing 
4  1  378-2545 Control Valve Gp  Stick 
5  1  381-1522 Control Valve Gp  Boom 
6  1  227-2141 Control Valve Cover Gp  Outlet 
7  6  378-4631 Fastener Kit  Torque for the center nuts is 20 N·m (15 lb ft). Torque for the right nuts is 20 N·m (15 lb ft). Torque for the left nuts is 20 N·m (15 lb ft). Repeat the procedure again tighten each nut to 60 N·m (44 lb ft). Repeat the procedure again tighten each nut to 80 N·m (60 lb ft). 
A  4  Port  - 
B  4  Port  - 
C  3  Line relief  - 
D  3  Line relief  - 
E  1  Signal limiter valve  Accumulate (Open) 
F  1  Signal limiter valve  Accumulate (Close) 
G  1  Signal limiter valve  Swing (CW) 
H  1  Signal limiter valve  Swing (CCW) 
J  1  Signal limiter valve  Boom (Up) 

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Table 2
373-7704 Main Control Valve Gp 
Section  2  3  4  5 
Function  Accumulate  Swing  Stick  Boom 
Line Relief Setting (C)  28000 kPa (4061 psi)  -  35000 kPa (5076 psi)  35000 kPa (5076 psi) 
Line Relief Setting (D)  28000 kPa (4061 psi)  -  35000 kPa (5076 psi)  35000 kPa (5076 psi) 
Flow Rate (B)  175 L/min (46 US gpm)  180 L/min (48 US gpm)  22 L/min (6 US gpm)  100 L/min (26 US gpm) 
Flow Rate (A)  175 L/min (46 US gpm)  180 L/min (48 US gpm)  220 L/min (58 US gpm)  210 L/min (55 US gpm) 
Signal Limiter Valve (E)  22000 kPa (3191 psi)  -  -  - 
Signal Limiter Valve (F)  22000 kPa (3191 psi)  -  -  - 
Signal Limiter Valve (G)  -  27500 kPa (3988 psi)  -  - 
Signal Limiter Valve (H)  -  27500 kPa (3988 psi)  -  - 
Signal Limiter Valve (J)  -  -  -  23000 kPa (3336 psi) 

Note: All pressures are checked at the pump.

378-2539 Control Valve Group

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Illustration 2g02731577

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Table 3
Specifications for 378-2539 Control Valve Gp 
Item  Qty  Part  Specification Description 
8  1  Cap  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
9  1  Nut  Tighten 60 ± 7 N·m (44 ± 5 lb ft). 
10  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
11  1  Screw  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
12  1  Nut  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
13  1  Cap  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
14  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
15  1  Nut  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
16  4  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
17  1  Screw  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
18  1  Plug  Tighten 250 ± 20 N·m (184 ± 14 lb ft). 

378-2541 Control Valve Group

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Illustration 3g02731575

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Table 4
Specifications for 378-2541 Control Valve Gp 
Item  Qty  Part  Specification Description 
19  1  Plug  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
20  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in). 
21  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in) 
22  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
23  1  Nut  Tighten 10 ± 7 N·m (7 ± 5 lb ft). 
24  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
25  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
26  2  Cap  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
27  2  Nut  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
28  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
29  4  Screw  Tighten 3 ± 1 N·m (26 ± 8 lb in). 
30  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
31  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
32  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 

381-1520 Control Valve Gp

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Illustration 4g02731576

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Table 5
Specifications for 381-1520 Control Valve Gp 
Item  Qty  Part  Specification Description 
33  1  Plug  Tighten 100 ± 20 N·m (74 ± 15 lb ft). 
34  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
35  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
36  1  Relief Valve  Tighten 100 ± 20 N·m (74 ± 15 lb ft). 
37  2  Cap  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
38  2  Nut  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
39  1  Relief Valve  Tighten 100 ± 20 N·m (74 ± 15 lb ft). 
40  4  Screw  Tighten 3 ± 1 N·m (26 ± 8 lb in). 
41  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
42  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
43  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 

378-2545 Control Valve Group

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Illustration 5g02731578

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Table 6
Specifications for 378-2545 Control Valve Gp 
Item  Qty  Part  Specification Description 
44  1  Plug  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
45  1  Screw  Tighten 2 ± 1 N·m (17 ± 8 lb in). 
46  1  Screw  Tighten 2 ± 1 N·m (17 ± 8 lb in). 
47  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
48  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
49  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
50  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
51  4  Screw  Tighten 3 ± 1 N·m (26 ± 8 lb in). 
52  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
53  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
54  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 

381-1522 Control Valve Group

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Illustration 6g02731581

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Table 7
Specifications for 381-1522 Control Valve Gp 
Item  Qty  Part  Specification Description 
55  1  Plug  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
56  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in). 
57  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in). 
58  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
59  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
60  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
61  2  Cap  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
62  2  Nut  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
63  1  Relief Valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
64  4  Screw  Tighten 3 ± 1 N·m (26 ± 8 lb in). 
65  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
66  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
67  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 

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