SEAL-U-CUP 4335814 - Caterpillar

The Procedure Before The Accumulator Purges
When the engine is running, the bulldozer blade can be lowered by pushing the work tool control forward. For a short amount of time, after the engine has been stopped, the bulldozer blade can be lowered by pushing the implement control lever forward.
Illustration 1 g02254693Make sure that hydraulic lockout switch (1) has not cut inputs to the hydraulic control circuit. The implement lever and the hydraulic valves must be active.
LOWER - Push the work tool control (2) forward in order to lower the bulldozer blade. Release the lever. The lever will return to the HOLD position.
LOWER - Move ripper raise/lower control (3) in a counterclockwise direction in order to lower the ripper. Release the lever. The lever will return to the HOLD position.The Procedure After The Accumulator Purges
After the engine has been stopped for a short amount of time, the control levers will not lower the implements to the ground.There is a mechanical method that can be used to lower the attachments.
Illustration 2 g01118072Remove access cover (4).
Illustration 3 g02282034
Arrangement with dozer/ripper valve
Relieve the pressure in the hydraulic tank.The dozer/ripper valves are located at the center of the fuel tank behind the operator module (cab).A bolt (5) with "9/16 - 18 x 64 mm" threads is stored inside the access cover. This bolt may be used to lower the implements.
Illustration 4 g02282054Lower Dozer Blade
Connect the drain hose to quick pressure tap (6). Run the hose to the hydraulic tank filler neck.
Remove quick pressure tap (7).
Slowly insert bolt (5) in order to lower the dozer. Lower Ripper
Remove quick pressure tap (8). Note: The drain hose is not required.
Slowly insert bolt (5) in order to lower the ripper.
Return bolt (5) to the storage position and return quick pressure tap (7).
Return access cover (4).