MIL-DTL-45150L
3.4.3 Turning and tracking ability. The chassis, when coupled to the prime mover
operating in its minimum turning circle, shall follow without cramping and without damage to the
towed chassis or prime mover and without interference to the towed chassis or prime mover
(see 4.7.2).
3.4.4 Grade and slope operation. The chassis shall operate without slipping or upsetting
when ascending or descending longitudinal grades up to 40 percent (%) and side slopes up to
20% (see 4.7.3).
3.4.5 Fording ability. The chassis shall be towable through fresh or salt water to a depth
great enough to entirely submerge the chassis for periods up to 15 minutes duration without
damage to the chassis or its components. This shall be accomplished without the use of special
kits and with a minimum of preparation and servicing before and after fording operations
(see 4.7.4).
3.4.6 Landing device. Unless otherwise specified (see 6.2), the chassis shall be equipped
with swing-up type landing device. The vertically adjustable swing-up type landing device shall
be furnished and mounted on the M103A3, M353, M390, M390C, M200A1, M492, M536, and
XM580 chassis (see 4.7 thru 4.9.2). The landing device on all chassis shall have adequate
capacity to support the fully loaded vehicle on any grade up to 10 degrees in any direction; and
shall withstand without damage the strain imposed upon it when coupling or uncoupling from the
towing vehicle. The landing device shall extend and retract and when retracted shall provide
ground clearance for cross-country operation (see 4.7.5).
3.4.7 Leveling jacks. When specified (see 6.2), the manually operated leveling jacks shall
have capacity to raise and support the fully loaded chassis and shall adjust to permit placing the
jack bases on the ground and leveling the chassis on an off-the-road site (see 4.7.5).
3.4.8 Stabilizers. Stabilizers such as step jacks on M200A1 and rear support legs (props)
on M103A3 and M116A2, shall stabilize the fully loaded chassis, without raising chassis wheels
off the ground. The stabilizers shall exhibit adjustments to permit placing their bases to the
ground for stabilizing the chassis on an off-the-road site (see 4.7.6).
3.4.9 Service brakes. When specified (see 6.2), the chassis trailer shall be equipped with
service brakes. The combined service brakes of the chassis and towing vehicle shall, under all
conditions of loading, bring the combination to a stop within a distance of 30 feet (ft) from a
speed of 20 miles per hour (mph) on dry, smooth, level road, free of loose material (see 4.7.7).
3.4.10 Parking brake. The parking (hand) brakes shall be capable of holding the chassis
on a dry, hard surfaced, 30% grade with payload headed up or down grade (see 4.7.8).
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