BOGIE AS 7T0376 - Caterpillar

The machine brakes can be released for towing. Use FT1973 Adapter Gp (1), two 123-0525 Adapters (7), and FT1845 Brake Release Pump (6).Relief Valve Setting
Possible brake piston seal damage could result without checking relief valve. Opening pressure must be checked and adjusted before connection is made.
Illustration 2 g00775222
The main pressure hose connects to 9J-6190 Adapter Union, 04-6683 Nipple, 5P-8018 Adapter Union, 8M-0547 Elbow, and 5P-2909 Plug. Plug the pressure hose at the connection with a 5P-2909 Plug. The components are indicated by shaded area (A).
Turn the handle of bypass valve (5) to the closed position.
While you are pumping handle (4), observe the opening pressure of relief valve (3).
Adjust the opening pressure of the relief valve. Set the pressure to 3030 70 kPa (440 10 psi).
Turn the handle on bypass valve (5) to the open position in order to relieve the pressure in the pump and in the hose. Connection for the Pump
Illustration 3 g00775205
Remove the components that were used to plug the pressure hose. The components are 9J-6190 Adapter Union, 04-6683 Nipple, 5P-8018 Adapter Union, 8M-0547 Elbow, and 5P-2909 Plug. The components are indicated by shaded area (A).
Illustration 4 g00775209
(1) Pump adapter
(7) Brake release adapter
Connect FT1973 Adapter (1) to the pump pressure hose. The adapter will be downstream from the relief valve.
Illustration 5 g00780123
(8) Steering valve
(9) Steering valve ports
Remove the seat and the floorplate from the operator station.
Remove the pressure test fittings from the top of steering valve ports (9).
Install one 123-0525 Adapter (7) into each of the steering valve ports.
Connect the FT1973 Adapter to the 123-0525 Adapters.
Route the pressure hose through the rear, around the side, and through the door of the cab. Connect the pressure hose to the pump. Install the pump temporarily on the platform.
Replace the floorplate and the seat.
Place the brake release pump in front of the operator.
Fasten the seat belt. Continue to the next topic. Brake Release
Illustration 6 g00775217
(5) Bypass valve
Turn bypass valve handle (5) to the closed position.
Initially, rapidly move the pump handle. This action will produce a large volume of oil flow.
The brake piston seal must be fully seated. The seating of the seal is evident by a sudden rise in the oil pressure. When the seal is properly seated, the pressure rises to the relief valve setting. The setting is 3030 70 kPa (440 10 psi).
Now, the machine can be towed.
Do not allow pressure to drop below 2756 kPa (400 psi) while towing.Partial brake engagement could occur and can result in brake damage.Brakes must be fully released when towed machine is moving.
Brake Engagement
Do not use the machine brakes to slow or stop the machine. Extensive brake damage and system contamination can result.
Illustration 7 g00775217
(5) Bypass valve Open bypass valve (5) in order to apply the brakes. This action will completely dump the oil.The brake system can only be applied by turning the bypass valve. The service brake pedal and the steering levers do not