374F Excavator Machine System Control Valve Caterpillar


Control Valve
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1.1. 309-3915 Compensator As (15)


Illustration 1g03505296

Table 1
Specification for 346-7570 Control Valve Gp 
Item  Qty  Part  Specification Description 
326-2664 Solenoid Valve Gp  Lubricate the O-ring seal and the ring lightly with the lubricant that is being sealed. 
8T-0269 Bolt  Torque to 13 ± 3 N·m (115 ± 27 lb in)
Nut  Before assembly, lubricate the O-ring seal and the ring lightly with the lubricant that is being sealed.
Torque to 78 ± 5 N·m (58 ± 4 lb ft)
310-0203 Solenoid Valve Gp  Torque to 15.7 ± 1.6 N·m (139.0 ± 14.2 lb in)
344-7392 Pressure Sensor Gp  Torque to 62 to 68 N·m (46 to 50 lb ft).
Operating voltage is 7 to 14 VDC.
Output type is PWM.
Output frequency is 500 ± 100 Hz.
Duty cycle is 10 to 90 %. 
352-6869 Relief Valve Gp  Before assembly, lubricate bore lightly with the hydraulic oil.
Torque to 300 ± 40 N·m (221 ± 30 lb ft)
304-5146 Shuttle Valve Gp  Before assembly, lubricate the O-ring seal and the ring lightly with the lubricant that is being sealed.
Torque to 41 ± 3 N·m (30 ± 2 lb ft)


Illustration 2g03505297
Section C-C

Table 2
Item  Qty  Part  Specification Description 
311-2886 Spring  Length under test force is 57 mm (2.2 inch).
Test force is 40.0 ± 2.0 N (9.0 ± 0.4 lb).
Free length after test is 75.2 mm (2.96 inch)
346-7601 Valve  Before assembly, lubricate bore lightly with the hydraulic oil. 
10  311-2888 Spring  Length under test force is 83 mm (3.3 inch).
Test force is 1029 ± 72 N (231 ± 16 lb).
Free length after test is 102.68 mm (4.043 inch)
11  346-1634 Retainer  Before assembly, apply red Loctite 271 to threads.
Torque to 55 ± 5 N·m (41 ± 4 lb ft)
12  416-5359 Control Valve Spool Gp  Before assembly, lubricate bore, O-ring seal, and ring lightly with the hydraulic oil. 
13  416-5351 Control Valve Spool Gp  Before assembly, lubricate bore, O-ring seal, and ring lightly with the hydraulic oil. 
14  416-5352 Control Valve Spool Gp  Before assembly, lubricate bore, O-ring seal, and ring lightly with the hydraulic oil. 


Illustration 3g03505420
View of area D

Table 3
Item  Qty  Part  Specification Description 
16  317-5154 Backup Ring   Lubricate lightly with the lubricant that is being sealed. 
17  4J-0523 O-Ring Seal  Lubricate lightly with the lubricant that is being sealed. 

309-3915 Compensator As (15)



Illustration 4g03505421

Table 4
Specification for 309-3915 Compensator As 
Item  Qty  Part  Specification Description 
Before assembly, lubricate bore lightly with the hydraulic oil. 
18  309-3916 Compensator  Before assembly, apply red Loctite 271 to threads.
Before assembly, lubricate bore lightly with the hydraulic oil.
Torque to 125 ± 10 N·m (92 ± 7 lb ft)
19  309-3922 Spring  Length under test force is 110 mm (4.3 inch).
Test force is 1190 N (268 lb).
Free length after test is 135.3 mm (5.33 inch)
20  309-3921 Spring  Length under test force is 99 mm (3.9 inch).
Test force is 500 N (112 lb).
Free length after test is 134.7 mm (5.30 inch)
21  309-3917 Retainer  Before assembly, apply red Loctite 271 to threads.
Torque to 35 ± 5 N·m (26 ± 4 lb ft)

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