TB-9-352
MISSILES AND ROCKETS, MEDIUM WRECKER M62, MEDIUM WRECKER TRUCK M543 SERIES, AND M816; AND WRECKER-TRUCK TRACTOR M246 SERIES, AND M819
TECHNICAL BULLETIN; LOAD-TESTING VEHICLES
SEPTEMBER 1978
TB-9-352 - Page 3 of 7
(5)
Repcat the cycle (2), (3), and(4) above
for 10 minutes with a rest period of 30 seconds
after each cycle.
b. 10,000-Pound Test.
(1)
Prepare the vehicle by setting the out-
riggers in place and extending the boom to a
10-foot minimum lifting radius.
(2)
Connect
the
wrecker
hook
to
a
10,000-pound load. By actuating the lifting cylin-
ders (boom control), raise the load to a height
of
at least 15 inches.
(3) Stabilize the load at this height and
then hold it with the power-divider lever engaged.
The maximum allowable drift-of-load (rate of
descent) is 1/2-inch per minute for a total of not
more than 3 inches in 6 minutes.
(4) Repeat (3) above with the power-
divider lever disengaged. The allowable drift-of-
load is the same.
6.
Load-Testing the M246, M246A1, M246A2,
and M819.
a. 4,000-Pound
Test.
With the outriggers
extended, and with full extension and minimum
elevation of the boom for a 26-foot radius, per-
form the steps in paragraph 5a(1) through (5).
b. 10,000-Pound Test.
With the outriggers in
place and the boom extended to a 10-foot mini-
mum lifting radius, perform the steps in para-
graph
5b(l )
through (4).
7. Final Inspection.
a.
Upon completion of the load test, perform a
thorough inspection of the crane mechanism for
the following defects:
(1) Twisted,
bent, and cracked frame
members.
(2) Damaged bolts and pins.
(3) Frayed cable.
b.
Equipment having defects noted in a above
will be repaired or replaced in accordance with
TM 9-2320-211 series.
8.
Recording the Load-Test.
After satisfactory completion of the load test.
mark the vehicle as follows:
a. Stencil the next load-test due date on the
right side of the boom shipper, using l/2-inch
letters as shown in figure 2.
b.
The stencil markings will be the same color
as the vehicle markings. If the vehicle is
unmarked, the stencil marking colors will be as
follows:
Color
of
vehicle
Color
of
marking
Olive drab
Chrome yellow
Marine Corps green
Chrome yellow
Strata blue
Chrome yellow
Navy gray
Black
Chrome yellow
Black
Figure 2.
Vehicle marking.
3
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