VALVE GP-RELIEF 1230153 - Caterpillar

At operating temperature, the hydraulic oil tank is hot and under pressure. Hot oil can cause burns. Remove the fill plug only when the engine is stopped and when the fill plug is cool enough to touch with your bare hands.
Identify all hydraulic lines as they are removed for reinstallation purposes. Cap and plug all lines and fittings to prevent any contaminants from entering the hydraulic system. 1. Remove panel (10). 2. Connect a hose to valve (13) and drain hydraulic tank (12). The capacity of the hydraulic tank is 117.5 liters (31 gallons). 3. Remove four cab mount bolts (24). Remove two bolts (25) from each side of the cab and install the larger bolt into the center hole on each side. 4. In Step 5, the cab will be raised. The cab will pivot on bolts (26) and after the cab is raised, install the remaining two bolts (24) from step 3 in holes (27) to hold the cab in position. Be sure to install a bolt in both sides of the cab. 5. Use a puller (A) to raise the cab as shown. After the cab is raised, install the two bolts in holes (27) in Step 4. 6. Disconnect six hydraulic lines (1) Cap or plug immediately. Remove two wires (2). Remove two bolts (3). Remove the valve. For installation of the brake valve group, reverse the removal steps.