TM 5-3805-291-23-1
BRAKE SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0015 00
HYDRAULIC FAN SPEED TEST AND ADJUSTMENT - CONTINUED
Margin Pressure (Testing and Adjusting)
1.
Connect 2,900 psi (20,000 kPa) pressure gage to pump discharge line (27).
2.
Connect 2,900 psi (20,000 kPa) pressure gage to load sensing line (28).
N OT E
Ensure hydraulic oil is at operating temperature.
3.
With assistance, start and run engine at low idle (TM 5-3805-291-10).
N OT E
Difference between gages is margin pressure. Margin pressure should be 335 14 psi (2,300 100 kPa).
4.
If margin pressure is out of range, remove cap from margin spool (29) (low pressure) on pump compensator (30).
5.
Adjust margin spool (29) until differential is 335 psi (2,300 kPa), by turning it clockwise to increase and counterclockwise
to decrease.
6.
Install cap on margin spool (29).
7.
Disconnect pressure gage from pump discharge line (27).
8.
Disconnect pressure gage from load sensing line (28).
9.
With assistance, stop engine (TM 5-3805-291-10).
483-1521
0015 00-24
