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521B and 522B Track Feller Bunchers Machine Systems Caterpillar


Main Control Valve (5-Bank) - Travel) (High Flow

Usage:

521B F7B

373-7703 Main Control Valve Gp

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Illustration 1g02731729

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Table 1
Specifications for 373-7703 Main Control Valve Gp 
Item  Qty  Part  Specification Description 
1  1  378-2539 Control Valve Gp  Inlet 
2  2  378-2548 Control Valve Gp  Travel right and left 
3  1  378-2542 Control Valve Gp  Tool 
4  1  378-2544 Control Valve Gp  Rotate / wrist 
5  1  378-2543 Control Valve Gp  Grab 
6  1  227-2141 Control Valve Cover Gp  Outlet 
7  6  382-1745 Fastener Kit  Torque for the center nuts 20 N·m (15 lb ft). Torque for the right nuts 20 N·m (15 lb ft). Torque for the left nuts 20 N·m (15 lb ft). Repeat the procedure retorquing each nut 60 N·m (44 lb ft). Repeat the procedure retorquing each nut 80 N·m (60 lb ft). 
A  5  Port  - 
B  5  Port  - 
C  3  Line Relief  - 
D  3  Line Relief  - 
E  1  Signal limiter valve  Rotate / wrist (CW) 
F  1  Signal limiter valve  Rotate / wrist (CCW) 
G  1  Signal limiter valve  Grab (Open) 
H  1  Signal limiter valve  Grab (Close) 

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Table 2
373-7703 Main Control Valve Gp 
Section  2  3  4  5 
Function  Travel Right or Travel Left  Tool  Rotate / Wrist  Grab 
Line Relief Setting (C)  -  35000 kPa (5076 psi)  35000 kPa (5076 psi)  28000 kPa (4061 psi) 
Line Relief Setting (D)  -  35000 kPa (5076 psi)  35000 kPa (5076 psi)  28000 kPa (4061 psi) 
Flow Rate (B)  210 L/min (56 US gpm)  165 L/min (44 US gpm)  185 L/min (49 US gpm)  175 L/min (46 US gpm) 
Flow Rate (A)  210 L/min (56 US gpm)  235 L/min (62 US gpm)  185 L/min (49 US gpm)  175 L/min (46 US gpm) 
Signal Limiter Valve (E)  -  -  26000 kPa (3771 psi)  - 
Signal Limiter Valve (F)  -  -  26000 kPa (3771 psi)  - 
Signal Limiter Valve (G)  -  -  -  22000 kPa (3191 psi) 
Signal Limiter Valve (H)  -  -  -  22000 kPa (3191 psi) 

Note: All pressures are checked at the pump.

378-2539 Control Valve Group

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Illustration 2g02731730

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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). 

378-2548 Control Valve Group

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Illustration 3g02731731

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Table 4
Specifications for 378-2548 Control Valve Gp 
Item  Qty  Part  Specification Description 
19  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in). 
20  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in). 
21  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
22  1  Plug  Tighten 30 ± 3 N·m (22 ± 2 lb ft). 
23  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
24  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
25  4  Screw  Tighten 3 ± 1 N·m (26 ± 8 lb in). 
26  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
27  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
28  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
29  1  Plug  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 

378-2542 Control Valve Group

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Illustration 4g02731728

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Table 5
Specifications for 378-2542 Control Valve Gp 
Item  Qty  Part  Specification Description 
30  1  Plug  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
31  1  Screw  Tighten 2 ± 1 N·m (17 ± 8 lb in). 
32  1  Screw  Tighten 2 ± 1 N·m (17 ± 8 lb in). 
33  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
34  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
35  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
36  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
37  4  Screw  Tighten 3 ± 1 N·m (26 ± 8 lb in). 
38  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
39  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
40  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 

378-2544 Control Valve Group

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Illustration 5g02731725

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Table 6
Specifications for 378-2544 Control Valve Gp 
Item  Qty  Part  Specification Description 
41  1  Plug  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
42  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in). 
43  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in). 
44  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
45  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 
46  1  Relief valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
47  2  Cap  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
48  2  Nut  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
49  1  Relief Valve  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
50  4  Screw  Tighten 3 ± 1 N·m (26 ± 8 lb in). 
51  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
52  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
53  1  Plug  Tighten 30 ± 7 N·m (22 ± 5 lb ft). 

378-2543 Control Valve Group

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Illustration 6g02731746

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Table 7
Specifications for 378-2543 Control Valve Gp 
Item  Qty  Part  Specification Description 
54  1  Plug  Tighten 100 ± 20 N·m (73 ± 14 lb ft). 
55  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in). 
56  1  Screw  Tighten 1 ± 1 N·m (8 ± 8 lb in). 
57  2  Bolt  Tighten 10 ± 3 N·m (7 ± 2 lb ft). 
58  1  Nut  Tighten 10 ± 7 N·m (7 ± 5 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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