HOSE 0779621 - Caterpillar

Table 1
Tools Needed
4C-4441 Relief Valve Test Tool Gp 1
1U-9358 Test Block Manifold 1
Illustration 1 g00932260
Combination Valve
(1) Implement relief valve
Illustration 2 g00932261
Implement relief valve
(2) Retainer assembly
(3) Nut Use the 1U-9358 Test Block Manifold in order to test implement relief valve (1) on the 4C-4441 Relief Valve Test Tool Gp. The pressure setting for the relief valve is 27600 400 kPa (3900 60 psi).
Remove implement relief valve (1) from the combination valve and install implement relief valve (1) on the 4C-4441 Relief Valve Test Tool Gp. Note: Refer to Disassembly and Assembly, "Combination Valve - Disassemble" for the correct procedure to remove the relief valve.
Purge the air from the system. The temperature of the oil must be 49° 3°C (120° 5°F).
Apply flow of 38 4 L/min (10 1 US gpm) to the valve and note the pressure that opens the relief valve.
Turn retainer assembly (2) clockwise in order to increase the pressure and turn retainer assembly (2) counterclockwise in order to decrease the pressure. One turn of the retainer assembly will change the setting approximately 6300 kPa (915 psi).
Repeat Step 2 and repeat Step 4 until you achieve a setting of 27600 400 kPa (3900 60 psi).
After you set the retainer assembly to the correct pressure setting, tighten nut (3) to 50 7 N m (37 5 lb ft). Hold retainer assembly (2) when you tighten nut (3).
Set the test pressure at 5600 70 kPa (812 10 psi). Maintain the temperature of the oil at 26 °C to 28 °C (79 °F to 82 °F).
Measure the leakage oil. If the leakage oil is greater than 0.004 L/min (0.0011 US gpm), replace the relief valve.
Install the relief valve on the combination valve. Refer to Disassembly and Assembly, "Combination Valve - Assemble" for the correct procedure to install the relief valve.