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|  MIL-C-53057(ME)
not obstruct the view of the operator. The exhaust system shall be
provided with a spark arrestor conforming to Forest Service Standard
5100-1 and SAE J350 for not less than 80 percent efficiency. The
spark arrestor shall be provided with a means for cleaning out
trapped particles.
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. Vapors or condensation shall not flow
through 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 furnished
in accordance with the engine manufacturer's recommendations. A label
specifying filter type shall be placed near the point of filter
installation. Oi1 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 for diagnostic purposes. The speed of the
tachometer drive shall be 1/2 of the crankshaft speed.
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 corro ion such that it will not
s
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 adjacent to the valve indicating
the type of oil sampled (engine or transmission, whichever is
appropriate).
3.11 Drive assembly. The drivetrain assembly shall consist o all
components necessary to transmit power from the engine to all four
wheels. Rear or front wheel drive disconnect may be provided for high
speed operation. All rotating shafts and axles shall be supported on
antifriction bearings. All gears shall operate in lubricant, and a
standard pressure grease lubrication system shall be provided for
other friction parts. Gear housing shall be equipped with filler
plugs and magnetic drainplugs. Differential ring and pinion gears
shall be adjustable. Drive shafts shall be provided with a minimum of
two heavy-duty universal joints and a nonbinding slip joint.
Drivetrain components shall conform to and shall be installed in
accordance with each component manufacturer's recommendations.
Drivetrain universal Joints shall not exceed 180 F when the crane is
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