TM 5-2420-232-10
0004
EMERGENCY HYDRAULICS
0004
The HMEE-I has an emergency hydraulic function. It utilizes an electrically driven hydraulic pump powered by the machine s
batteries. If main hydraulic power is lost, this system can provide enough power to raise the loader arms, backhoe, and stabiliz-
ers ready for machine recovery. The system can then be switched to provide hydraulic power to the steering to provide limited
assistance during recovery. Fully charged batteries should provide power for approximately 4 minutes.
CAUTION
Use the emergency hydraulics only in the event of main hydraulic failure, to stow the loader arms,
backhoe and stabilizers ready for machine recovery, or to provide emergency steering. Using the
emergency hydraulics in any other situation or for any other purpose can cause equipment failure.
Activate Emergency Circuit
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1.
Open the left dash fuse access panel (Figure 88, Item 1).
2.
Release the locking latch (Figure 88, Item 2) on the operating switch (Figure 88, Item 3) by sliding the latch to the left and
press the latch end of the switch down. The emergency circuit is now operational.
NOTE
Before selecting steering system, turn ignition switch on.
3.
Switch the changeover switch to activate either the loader hydraulic (Figure 88, Item 4) or steering systems (Figure 88,
Item 5).
4.
Close the access panel (Figure 88, Item 1).
5.
Operate the loader and/or backhoe controls as required, or the steering system dependant on current settings and require-
ments.
435-A0301
Figure 88. Emergency Hydraulics Circuit
04
Deactivate Emergency Circuit
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1.
Open the left dash fuse access panel (Figure 88, Item 1).
2.
Press the non-latch end of the switch (Figure 88, Item 3) down. Ensure the switch has locked in the OFF position by press-
ing on the latch end without releasing the latch. You should not be able to push the switch (Figure 88, Item 2) down. The
emergency circuit is now turned OFF.
3.
Close the access panel (Figure 88, Item 1).
Change 1
