BOLT 1958244 - Caterpillar

Table 1
Steering Pressure Test
Machine Model DateToday
Machine Serial Number Machine Hours
ECM Flash File Flash File
Date
Table 2
Visual Checks
Oil Level Oil viscosity
Air or water in the oil Examination of oil filter
Table 3
Test Specifications Actual
Steering oil temperature during the test 60° C (140° F)
121 °C (250 °F)
Cut out pressure at low idle 24115 1379 kPa (3500 200 psi)
Cut-in pressure at low idle 22050 1379 kPa (3200 200 psi)
Cycle time of the cut out pressure to the cut-in pressure at low idle Greater than 30 seconds 1.
2.
3.
Average
Cycle time at high idle while the steering wheel is turned at 1 revolution per second. Release the brakes. Turn the steering wheel from the left to the right and then turn the steering wheel back to the left. 3 to 5 seconds 1.
2.
3.
Average
Release the brakes and turn the steering wheel from stop to stop at high idle. Record the number of turns of the steering wheel. Turn the steering wheel 3.5 to 4.5 turns at 1 revolution per second. Left to right
1.
2.
3.
Average Right to left
1.
2.
3.
Average
Pump low standby pressure at low idle 0 to 1724 kPa (0 to 250 psi)
High-pressure cutoff valve (Pressure and flow compensator valve) at high idle
The accumulator should be charged and the sensor on the accumulator should be disconnected. 28200 1000 kPa (4100 150 psi)
Back up relief valve pressure at low idle 27580 345 kPa (4000 50 psi)
Record the pressure setting of the steering check and relief valve while the steering wheel is turned to the left. 28000 1000 kPa (4062 145 psi)
Record the pressure setting of the steering check and relief valve while the steering wheel is turned to the right. (1) 28000 1000 kPa (4062 145 psi)
Nitrogen charge pressure for one of three steering accumulators 7230 345 kPa (1050 50 psi) at 21 °C (70 °F) (2)
Nitrogen charge pressure for two of three steering accumulators 7230 345 kPa (1050 50 psi) at 21 °C (70 °F)
Nitrogen charge pressure for three of three steering accumulators 7230 345 kPa (1050 50 psi) at 21 °C (70 °F)
(1) Use a bench test to determine the pressure setting for this valve before you perform any adjustments.
(2) The specification for this pressure depends on the ambient temperature. Refer to the table in Testing and Adjusting, "Steering Accumulator - Test and Adjust".