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|  MIL-T-28571G(NAvY)
shall be performed with calibrated instruments. Copies of calibration
certificates shall be included with the test report. The following tests shall
be performed:
a.
A vacuum test, using the priming pump, with a capped suction at least
20 feet long, shall develop 22 inches of vacuum and hold the vacuum
with a drop of not more than 10 inches in 10 minutes. The printer
shall not be used after the 10 minute test period has started. The
capping device shall allow the hose interior to be observed under the
suction tests. The discharge outlets of the pump shall be uncapped.
The pump, while drafting water with a minimum lift of 10 feet through
b.
20 feet of 5-inch suction hose, shall deliver, in a continuous
operational test, a minimum of:
(1) 1,000 gpm at 150 psig net pump pressure for 2 hrs.
(2) 700 gpn at 200 psig net pump pressure for 1/2 hr.
(3) 500 gpm at 250 psig net pump pressure for 1/2 hr.
c.
The pump, while drafting water with a minimum lift of 10 feet through
20 feet of 5-inch suction hose, shall deliver, in a continuous
operational test, a minimum of 1,000 gpm at 165 psig net pump
pressure for 10 minutes.
d.
A test shall be conducted to verify that the relief valve performs in
accordance with 3.10.4.
e.
The pump shall deliver a minimum of 500 gpm from the water tank to
determine conformance to 3.10.
4.4.3
am system test. The foam system shall be tested using AFFF
conforming to MIL-F-24385. The metering valve shall be set to deliver 3 percent
of foam solution for not less than 1 minute while discharging 250 gpm through
the rear 2-l/2-inch discharge with 100 feet of 2-1/2-inch hose and fog nozzle.
Failure to use at least 15 gallons of foam liquid per minute, at 3 percent,
shall constitute failure of this test.
4.4.3.1 Monitoring test. The monitor (deluge gun) shall be tested with AFFF
for 1 minute at 500 gpm. At least 30 gallons of AFFF shall be used during the
test. The monitor shall be tested to verify a water flow rate of at least 1,000
gpm when drafting through the side suction connection.
4.4.4 Auxiliarv generator test. A test shall be conducted to verify that
the auxiliary generator conforms to the requirements of 3.8.6.3.
4.4.5 Production sample. Upon acceptance of the first article unit, it
shall remain at the manufacturing facility as a production sample, and shall be
the last fire truck shipped on the contract. The first article shall unit be
reconditioned, including replacement of abnormally worn parts and paint touch-up
or repainting, prior to delivery to enable it to be accepted as a contract item.
The contractor shall maintain the first article in a serviceable condition for
the duration of the contract.
4.5 Quality conformance tests. Each production truck, loaded as specified
in 3.8-1, shall be operated and tested as follows:
5 miles over paved roads at maximum speed of not less than 60 mph.
5 miles over graded dirt roads at maximum speeds of not less than 25
mph .
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