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 TM 5-2420-224-34
Section
Il.
TROUBLESHOOTING
OVERVIEW
This section contains troubleshooting, testing, and repair information for the SEE/HMMH. Make
sure the problem is real. Be sure the electrical or hydraulic power is on when needed. Refer to
the preliminary troubleshooting procedures before you start troubleshooting, and during
troubleshooting when referenced.
Page
Preliminary Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Troubleshooting Symptom Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Troubleshooting Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRELIMINARY
TROULESHOOTING
PROCEDURES
NOTE
Fluid leaks are classified as Class I Class II, or Class Ill:
Class I: Seepage of fluid (as indicated by wetness or discoloration) not great enough to
form drops.
Class II: Leakage of fluid great enough to form drops, but not enough to cause drops to
drip from the item being checked or observed.
Class Ill: Leakage of fluid great enough to form drops that fall from the item being
checked or observed.
Before starting any specific troubleshooting procedures, perform the following:
1.
Visually check for ruptured oil hoses or tubes, and for Class II or Class Ill leaks.
2.
Check for mechanical jamming or binding caused by rocks or other foreign matter,
3.
Check fluid levels in subject area and service as required (LO 5-2420-224-12).
4.
Relieve hydraulic pressure (TM 5-2420-224-20) and air pressure (TM 5-2420-224-20) before
opening any hydraulic or air lines.
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