CONTROL GP-JOYSTICK 2324157 - Caterpillar

Table 1
Relief Valve Pressure Settings    
Cylinder     Cylinder Position     Power shift Pressure and Engine Speed (1)     Relief Pressure Setting    
Standard Power Offset Boom    
Boom     Extended    
2900 50 kPa (421 7 psi)
Engine speed dial "10"    
32500 + 1500 - 500 kPa (4714 + 218 - 73 psi)    
31900 + 1500 - 500 kPa (4627 + 218 - 73 psi)    
Retracted
2900 50 kPa (421 7 psi)
Engine speed dial "10"    
32500 + 1500 - 500 kPa (4714 + 218 - 73 psi)    
32500 + 1500 - 500 kPa (4714 + 218 - 73 psi)    
( 1 ) AEC switch OFFAdjustment (Boom Cylinder Head End)
Illustration 2 g02094233
Cutaway view of boom lowering control valve (4) Line relief valve (left boom cylinder head end) (5) Line relief valve (right boom cylinder head end) (6) Locknut (7) Adjustment screwNote: In order to adjust relief valve (5) on the right boom lowering control valve, relief valve (4) on the left boom lowering control valve must be temporarily adjusted.
Mark the location of adjustment screw (6) on relief valve (4) .
Loosen locknut (6) on relief valve (4) on the left boom lowering control valve. Turn adjustment screw (7) clockwise by one quarter turn. Tighten locknut (6) .
Move the joystick for the boom to 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