CYLINDER AS 1411980 - Caterpillar

Table 2
Line Relief Valve Pressure Settings
Standard Configuration
Cylinder Cylinder Position Power Shift Pressure and Engine Speed Setting Relief Pressure Setting
Boom Extended 2900 50 kPa (421 7 psi)
Speed Dial 10 37500 + 500 - 2000 kPa (5439 72.5 - 290 psi)
Retracted
Stick Extended 2900 50 kPa (421 7 psi)
Speed Dial 10 37500 + 500 - 2000kPa (5439 +72.5 - 290 psi)
Retracted
Bucket Extended No Fixed Pressure
Speed Dial 10 28900 + 400 - 2900 kPa (4192 + 58 - 421psi)
Retracted No Fixed Pressure
Speed Dial 10 31300 +400 - 2900 kPa (4540 + 58 -421 psi) Adjustment (Boom Cylinders)
Note: Refer to Table 2 for the appropriate settings for power shift pressure, engine speeds, and pressures for the individual line relief valves.
To adjust the line relief valve pressure setting of the boom cylinder head end (7), move the joystick for the boom until the boom is at the full BOOM RAISE position (full extension of boom cylinders). Hold the joystick for the boom in this position.
Check the pressure in the boom cylinder head end on the pressure gauge at pressure tap (1).
Return the joystick for the boom to the NEUTRAL position.
Refer to Table 2. If the pressure gauge reading at pressure tap (1) is not within the specification, adjust line relief valve (7).
In order to adjust line relief valve (7), loosen locknut (14) on the boom line relief valve. Turn adjustment screw (15) until the pressure gauge reading at pressure tap (1) is within the specification. Refer to