MOTOR CONTROL SOLENOID VALVE INITIATION SET SCREW - ADJUST CONTINUED
1. Inspect hydraulic system for Class III leakage and damage. Hydraulic lines must be free from kinks, sharp
bends, and restrictions.
2. Turn ignition switch to OFF position (TM 5-2410-240-10).
4. Turn battery disconnect switch to ON position (TM 5-2410-240-10).
5. Turn ignition switch to ON position. Start ET and select machine control ECM.
N OT E
Wait at least 30 seconds for diagnostic codes to become active.
6. Monitor active diagnostic codes with ET. Check and record any active diagnostic codes. If diagnostic codes are
7. Verify that machine is set to lowest forward ground speed and that reverse ground speed is 100% of forward
ground speed (TM 5-2410-240-10).
8. Lift and support machine high enough so that tracks do not touch ground (WP 0281).
WARN I N G
Tracks will move during this procedure. Keep all personnel away from machine during
Provide adequate support and use assistance during procedure.
Failure to follow these warnings may result in injury or death to personnel.
1. Perform Hystat Pump and Motor Solenoid Calibration. Refer to Calibrations in this work package.
2. Monitor Drive Motor Solenoid Current for each motor during calibration procedure. The calibration procedure
will find and record saturation, and initiation current for pumps, then motors. The current for two motors will rise
together until machine ECM detects a 5-RPM increase in motor speed of one motor. This can happen very
quickly and calibration may need to be performed several times to identify initiation current.
3. Adjust motor control valve solenoid set screw (Figure 24, Item 3) on motor (Figure 24, Items 1 and 6) with
greatest amount of recorded initiation current.
4. Adjustment is very sensitive. Loosen locknut (Figure 24, Item 4) and turn set screw (Figure 24, Item 3)
clockwise 1/4 turn to decrease initiation current. Turn set screw (Figure 24, Item 3) counterclockwise 1/4 turn to
increase initiation current.
5. Perform Hystat Pump and Motor Solenoid Calibration after each adjustment.