374F Excavator Machine System Control Valve Caterpillar


Control Valve
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1.1. 309-3915 Compensator As (10)


Illustration 1g03505541

Table 1
Specification for 346-7580 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)
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 2g03505542
Section C-C

Table 2
Item  Qty  Part  Specification Description 
346-1626 Spring  Length under test force is 71 mm (2.8 inch).
Test force is 740 ± 55 N (166 ± 12 lb).
Free length after test is 87 mm (3.4 inch)
346-1628 Retainer  Before assembly, apply red Loctite 271 to threads.
Torque to 55 ± 5 N·m (41 ± 4 lb ft)
416-5352 Control Valve Spool Gp  Before assembly, lubricate bore, O-ring seal, and ring lightly with the hydraulic oil. 
416-5351 Control Valve Spool Gp  Before assembly, lubricate bore, O-ring seal, and ring lightly with the hydraulic oil. 


Illustration 3g03505539
View of area D

Table 3
Item  Qty  Part  Specification Description 
11  317-5154 Backup Ring   Lubricate lightly with the lubricant that is being sealed. 
12  4J-0523 O-Ring Seal  Lubricate lightly with the lubricant that is being sealed. 
13  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)

309-3915 Compensator As (10)



Illustration 4g03505544

Table 4
Specification for 309-3915 Compensator As 
Item  Qty  Part  Specification Description 
Before assembly, lubricate bore lightly with the hydraulic oil. 
14  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)
15  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)
16  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)
17  309-3917 Retainer  Before assembly, apply red Loctite 271 to threads.
Torque to 35 ± 5 N·m (26 ± 4 lb ft)