STICK & BEARING AS 5I3507 - Caterpillar

Table 2
Pressure Specifications    
System    Specifications    
Main pump pressure     Heavy Lift    
37000 to 38300 kPa (5366 to 5555 psi)    
no Heavy Lift
32500 to 33800 kPa (4710 to 4900 psi)    
Load sensing signal limiter pressure     Heavy Lift    
35000 to 36000 kPa (5075 to 5220 psi)    
no Heavy Lift
30500 to 31500 kPa (4420 to 4565 psi)    
Margin pressure    
2000 to 2300 kPa (290 to 330 psi)    
Pilot pressure    
3100 to 3500 kPa (450 to 507 psi)    
Pilot accumulator gas charge pressure (1)    
1000 kPa (145 psi)    
Main pump pressure (Proportional reducing valve)     Mode I     No load
1150 to 1200 kPa (167 to 174 psi)     Load
-75 bits    
Mode II No load
1550 to 1600 kPa (225 to 232 psi)     Load
-75 bits    
Mode III No load
1700 to 1750 kPa (247 to 254 psi)     Load
-50 bits    
Destroke pressure (2)    
14000 to 16000 kPa (2030 to 2320 psi)    
Swing cutoff pressure    
37000 to 38500 kPa (5367 5584 psi)    
Swing pump pressure (Proportional relief valve)     Mode I    
1000 to 1050 kPa (145 to 150 psi)    
Mode II (3)    
Swing charge pressure (pump)    
2000 to 2200 kPa (290 to 320 psi)    
Swing brake    
3100 to 3500 kPa (435 to 465 psi)    
Wheel brake accumulator charging pressure     Cut-in    
12000 to 12500 kPa (1740 to 1812 psi)    
Cut-out
15000 to 15500 kPa (2175 to 2247 psi)    
Wheel brake accumulator gas charge pressure (3)    
4500 kPa (650 psi)    
Wheel brake valve     Front (disc)    
6000 to 7000 kPa (875 to 1025 psi)    
Rear (disc)
Front (disc)
7000 to 8000 kPa (1025 to 1450 psi)    
Rear (drum)
Axle accumulator gas charge pressure (3)    
1000 kPa (145 psi)    
Parking brake reserve pressure    
1150 to 1250 kPa (165 to 180 psi)    
Travel motor pressure (upstroke)    
25000 to 26000 kPa (3625 to 3770 psi)    
Backup mode (main pump and swing pump)     Mechanical    
1200 to 1300 kPa (175 to 190 psi)    
Electrical
1000 to 1250 kPa (145 to 180 psi)    
Steering pressure    
18000 to 19500 kPa (2610 to 2830 psi)    
Standby pressure    
2500 to 3000 kPa (360 to 435 psi)    
Shift pressure     First gear    
3100 to 3500 kPa (450 to 507 psi)    
Second gear
( 1 ) Nitrogen gas pressure varies with the temperature. To obtain the most accurate nitrogen charge, the temperature of the accumulator must be identical to the air temperature around the accumulator. The specification is with an air temperature of 21 °C (70 °F). Refer to Testing and Adjusting, "Accumulator - Test and Charge" for additional charging pressure and temperature relationships.
( 2 ) Use the 123-6471 Diagnostic Tool Group to adjust the constant mode from 1770 kPa (257 psi).
( 3 ) The swing pump pressure is higher than Mode I by 18 percent.Note: The