IDLER GP-TRACK 7T9461 - 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, NENG2500, "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 g03031176
(1) Parking brake control valve (2) Brake release sequence valveSpecifications
Table 1
317-3076 Control Valve Gp (SEQUENCE VALVE)    
Pressure Setting    
2000 172 kPa (290 25 psi)    
Illustration 2 g03145516
(2) 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
33.9 N m (25 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. ReferenceRefer to Operation and Maintenance Manual, "Steering Frame Lock" for the machine being serviced.
Release the braking system oil pressure.ReferenceRefer to Systems Operation, Testing and Adjusting, "System Pressure - Release" for the machine that is being serviced.Note: Put identification marks on the hose assemblies for installation purposes.
Disconnect the hose assemblies from brake control valve (1) .
Remove the three retaining bolts and three washers. Remove brake control valve (1) .Adjustment Procedure
Connect brake control valve (1) to a hydraulic test bench.
Illustration 3 g03031196
Brake release sequence valve and manifold (1) Parking brake control valve (2) Brake release sequence valve (3) Locknut (4) Adjusting screw (5) Port (from brake release system) (6) Port (from pilot oil pressure reducing valve) (7) Port (to hydraulic tank)
Loosen locknut (3). Turn adjusting screw (4) fully clockwise.
Connect a supply of oil to port (5). Refer to Table 1 for the oil supply pressure.
Connect a supply of oil to port (6). Refer to Table 1 for the oil supply pressure.
Turn adjusting screw (4) counterclockwise until oil flows from port (7) .
Tighten locknut (3). Refer to table 2 for the correct torque setting.
Install brake control valve (1) to the machine. Install the three bolts and three washers.
Connect the hose assemblies to brake control valve (1)