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MIL-S-52124B(ME)
(3) Conditions considered by the contracting officer to
be beyond the control of the supplier.
(b) Aggregate material.  Aggregate delivered to the screening
unit shall be material as specified in 3.1.1.
(c) Tolerance.  The sized material produced shall be within
the following tolerances:
(1) For the l-inch, l/2-inch, and l/4-inch screens,
not more than 10 percent of the material in the
over-product shall pass a screen with the same
size opening, and not more than 10 percent of the
material in the through-product shall be retained
on a screen with the same size opening.
4.6.2.1.2 Capacity.  Operate the screening unit for 40 hours
screening the specified material (see 4.6.2.l.l(b)). Cumulative daily
runs will be permissible in performing this test.  Four sizes of
material shall be produced:  (a) l-1/2-inch to 1-inch; (b) l-inch to
1/2 inch; (c) l/2-inch to l/4-inch; and (d) l/4-inch-minus. Production
of less than 75 tons per hour as specified in 3.1.1, evidence that any
part or component does not function as specified herein, or nonconfor-
mance to 3.10.2, 3.10.2.2, and 3.11.1.4 shall constitute failure of
this test.
-
4.6.2.2 Transposability tests. TOW the screening unit, with com
ponents removed to meet the requirement of 3.1.2(f), as follows:
250 miles over highways with the M52 truck-tractor at
(a)
speeds up to 30 mph.
(b)
10 miles cross country with the M123 truck-tractor at
speeds up to 10 mph.
250 miles over highways and 10 miles cross country with
(c)
the dolly specified in 3.14 and the M51 dump truck
ballasted as required to provide traction.
Before any highway and cross-country tests are conducted,
(d)
measure all critical mounting points on the screening unit.
After all highway and cross-country tests are completed,
check the measurement of critical mounting points and inspect
all welds.
Tow over 6-inch high obstacles such that all left and right
(e)
combinations of' wheels have simultaneously passed over the
obstacles.  Observe tire-to-surface contact, evidence of
44

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