TM 5-2420-231-23-1
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Table 1. Multiple Backhoe Operations (Pilot Controls) Do Not Function Correctly.
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MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 1. Test Operation of
Multiple Backhoe
Backhoe Controls.
Operations (Pilot Controls)
Do Not Function Correctly
1. Start and operate machine (TM 5-
2420-231-10).
2. Turn pilot control switch (Figure 1,
Pilot Control Switch Illuminates -
Item 1) to the on position (TM 5-
Proceed to step 3.
2420-231-10).
Pilot Control Switch Does Not
Illuminate - Proceed to Test Step 2.
3. Operate backhoe control pattern
Pilot Control Pattern Switch
switch (Figure 1, Item 2) to pattern
Illuminates (Pattern 1) - Proceed to
1 (TM 5-2420-231-10). Monitor
step 4.
and record machine operation.
Pilot Control Pattern Switch Does
Not Illuminate - Proceed to Test Step
20.
Figure 1. Backhoe Pilot Control and Control Pattern Switches.
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4. Wait 2 seconds before operation.
