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|  MIL-T-52843C
3.10.2.8 Exhaust system. The exhaust system shall be protected
against entry of rain and ocean surf. The back pressure of the
exhaust system, including muffler, shall in no case exceed the
maximum recommended by the engine manufacturer when measured
approximately 2 inches beyond the header outlet at any load up to
rated net continuous load. The exhaust system shall be arranged to
prevent burns to the operator and maintenance personnel while working
on the step surfaces of the forklift. The exhaust system shall be
provided with a spark arrestor conforming to either Forest Service
Standard 5100-1, or SAE J350 for not less than 80 percent efficiency.
The spark arrestor shall be provided with a means for cleaning out
trapped particles. Exhaust discharge shall be directed so as to
minimize the exhaust fumes at the operator's station. The exhaust
system shall not obstruct the view of the operator.
3.10.2.9 Crankcase ventilation system The crankcase ventilation
.
system shall prevent water entering the engine during fording
operations. When the crankcase vapors are directed into the induction
system, means shall be provided on turbocharged engines to prevent
coking of turbocharger blades. No vapors or condensation shall be
deposited on or come in contact with the air-cleaner element.
3.10.2.10 Oil filter. Oil filter(s) of the heavy-duty full flow
type or heavy-duty full flow and partial flow type shall be
accessible and shall be furnished in accordance with the engine
manufacturer's recommendations. A label specifying filter type shall
be placed near the point of filter installation. Oil lines, when
applicable, to and from the filters shall be installed to minimize
vibration and shall be of flexible hose meeting the requirements of
SAE J30(d) with reusable fittings.
3.10.2.11 Tachometer drive. A heavy-duty key type tachometer drive
shall be provided and shall have a 5 32 inch female connection in
/
accordance with SAE J678.
3.10.2.12 Oil sampling valve. An oil sampling valve shall be
provided on the engine and transmission. The valve shall be manually
operated and shall automatically close after release. It shall be
made of material resistant to corrosion such that it will not
contaminate the sample. The discharge port of the valve shall be
covered with a captive chained metal threaded cap which provides a
positive seal of the sampling port. The valve shall be located in
such a way as to insure that personnel will not be exposed to danger
when taking oil samples with the engine running. The location of the
oil tap shall be such that when samples are taken, it shall be a true
representation of oil that is flowing while the engine is running.
The sampling valve shall be labeled in accordance with MIL-STD-1472
adjacent to the valve indicating the type of oil sampled (engine or
transmission, whichever is appropriate).
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