TM 5-3805-281-24-1
Tests
NOTE: The pressure setting for the circuit relief valves
are higher than the system relief valve. The
adjusting plug for system relief valve must be
turned in approximately 1/2 turn to increase the
pressure setting.
The power boost function can be used to check
the boom up and down, arm in, and bucket load
circuit relief valves if it is adjusted to the high side
of the specification.
5. Turn the adjusting plug for system relief valve (F) in
1/2 turn to increase the pressure setting.
6. Extend the cylinder to check a head end circuit relief
valve; retract the cylinder to check a rod end circuit
relief valve.
7. Run machine at specifications.
Engine--Specification
D--Left Control Valve
E--Right Control Valve
Speed ..................................................................... 1200 rpm approximate
F--System Relief and Power Boost Valve
G--Arm Out Circuit Relief Valve
Work Mode Selector--Specification
H--Auxiliary Circuit Relief Valve
Position ........................................................................................ Dig Mode
9025
E Mode Switch--Specification
25
82
Position .................................................................................................. Off
HP Mode Switch--Specification
Position .................................................................................................. Off
Auto-Idle Switch--Specification
Position .................................................................................................. Off
NOTE: If pressure reading fluctuates, increase engine
speed slightly.
8. Actuate the function over relief for circuit relief valve
being checked.
9. Record the pressure reading for each circuit relief
valve checked.
Continued on next page
CED,TX08227,3035
1923MAR984/6
6-229
