VALVE GP-CONTROL 4T0439 - Caterpillar

Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, PERJ1017, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g06143533
(1) Brake release sequence valve
(2) Parking brake control valveSpecifications
Table 1
317-3076 Control Valve Gp (SEQUENCE VALVE)
Pressure Setting 2100 170 kPa (305 25 psi)
Illustration 2 g06143537
(1) Brake release sequence valve
(3) Brake release sequence valve locknut
Table 2
Specification Description
Item Qty Part Description
2 1 317-3076 Control Valve Gp Torque to 34 1.7 N m (25 1.2 lb ft)
3 1 Locknut Torque to 9.5 0.5 N m (84 4.4 lb in) Introduction
The sequence valve ensures that the brake release system is disabled when the parking brake is disengaged. This procedure is used to set the brake release sequence valve opening pressure.Required Tools
Table 3
Required Tools
Tool Item Qty Part No Description
- - 1 - Test Bench Test Preparation
Move the machine to a hard, level surface.
Engage the parking brake and stop the engine.
Install the steering frame lock.Reference: Refer to Operation and Maintenance Manual,