This Task Covers:
b. Follow-On Maintenance
Gauge, pressure, capable of measuring 0 to 3,500 psi
TM or Para
(0 to 24 132 kPa)
Spare tire and carrier assembly
Tools and Special Tools
FEL and backhoe travel stops
Hydraulic valve manual override lever, BII,
Engine access panel removed
Estimated Time to Complete
MOS 62B, Construction Equipment Repairer (2)
FO-4, Hydraulic schematic
Remove cap (1) from test port (2) on backhoe
valve block (3).
Install gauge (4) on test port (2).
Start engine and ensure engine speed is at idle
and hydraulic master switch is in OFF
Use hydraulic valve manual override lever to
stall out backhoe bucket hydraulic circuit on
backhoe valve block (3).
Observe gauge (4). Gauge should read
3,000 psi (20 684 kPa).
· Backhoe relief valve only requires small
amount of rotation to properly adjust
· Turning backhoe relief valve clockwise
increases hydraulic pressure and turning
counterclockwise lowers the pressure.
If pressure is not 3,000 psi (20 684 kPa), use 6-mm Allen wrench to rotate backhoe relief valve (5) until the correct
pressure is displayed on gauge (4).