11
EATON
EP Control for Medium Duty 72400 Piston Pumps Parts & Service 08-10-0003-EN-0901 September 2001
Install and
Torque
Alignment slot to be
towards control spool
±
90˚
Spool
Solenoid
Solenoid
E. Note the number stamped on
the cap of the low pressure relief
valve. -022 is 220 psig (15 bar), -
030 is 305 psig (21 bar), etc. This
will be the high setting. Settings
can vary from 155 psig (11 bar) to
325 psig (22.4 bar).
F. Slowly rotate the neutral adjust-
ment screw clockwise until
charge pressure drops to its low
setting. Mark the neutral adjust-
ment screw location.
Note:
The charge pressure low
setting is usually 40-60 psig
lower than the high setting.
G. Rotate the neutral adjustment
screw counterclockwise. The
charge pressure will rise.
Continue turning counterclock-
wise until the pressure drops
again to its low setting. Mark
the neutral adjustment screw
location.
H. Rotate the neutral adjustment
screw to the position between
the two marks.
I. Carefully hold adjustment screw
while torquing locknut. Torque
locknut to 10±1 lbf·ft. Neutral
adjustment is completed.
Step 16
Install the two “L” brackets on each
end of the servo piston cap with
the flat end facing up to hold the
electronic module. Replace the 10-
24 cap screws on the pump and
torque with 5/32" hex key or bit
socket to 60-68 lbf·in.
300
200
400
100
500
0
600
PSI
300
200
400
100
500
0
600
PSI
High
Setting Range
Low
Setting Range
Repair & Service
