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TM 9-2320-302-20-2
GENERAL MAINTENANCE INSTRUCTIONS - CONTINUED
0299 00
LOCKWIRE
1.
Always use nonelectrical wire.
2.
Drilled head screws and bolts usually do not require lockwiring if they are installed with self-locking nuts or lockwash-
ers.
3.
Three screws or bolts are the maximum number that may be lockwired in a series when they are spaced 4-6 in (10.2-15.2
cm) apart. The maximum number of closely spaced multiple groups of screws or bolts to be lockwired is limited to the
number of units that can be lockwired with a 24 in (61 cm) length of wire.
4.
Do not secure screws, bolts or fittings which are spaced more than 6 in (15.2 cm) apart. Lockwire these fasteners to tie
points 6 in (15.2 cm) or less away.
5.
Lockwire parts so that tension will be on lockwire when parts tend to loosen. Lockwire should be installed and twisted
tight so that loop around head stays down and does not come up over head of screw or bolt. This does not apply to cas-
tellated nuts when slot is close to top of nuts; wire is more secure when made to pass along the side of stud. Ensure that
lockwire is tight but not overstressed.
6.
Make pigtail of 1/4-1/2 in (6.4-12.7 mm) at end of lockwire. Bend pigtail down so it will not become a snag.
7.
When lockwiring castellated nuts, tighten castellated nut to low side of torque range, then continue tightening until slot
lines up with hole.
8.
In blind, tapped hole application of bolts, castellated nuts or studs, lockwire as illustrated.
SMALL SCREWS IN CLOSELY SPACED,
EXTERNAL RETAINER RING:
CLOSED GEOMETRICAL PATTERN:
SINGLE FASTENER
SINGLE WIRE METHOD
SINGLE WIRE METHOD
APPLICATION:
DOUBLE TWIST METHOD
MULTIPLE FASTENER APPLICATION:
CASTELLATED NUTS ON UNDRILLED STUDS:
DOUBLE TWIST METHOD
DOUBLE TWIST METHOD
FLUID DISPOSAL
Dispose of contaminated drained fluids in accordance with the Standard Operating Procedures (SOP) of your unit.
General. The digital multimeter is used to troubleshoot the electrical system of the vehicle. The multimeter's ohms
1.
scale is used to test for continuity, shorts, and resistance and the voltmeter scale is used to test voltage levels at any point
in the electrical system.
0299 00-10

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