MIL-DTL-62049G
4.5.10.8.1.1 Watertightness test-body closed (non-expanded). To determine
conformance to 3.6.8, the semitrailer body shall be tested in the closed (non-expanded) mode for
watertightness as specified in 4.5.10.8, for the specified period. Water leakage or evidence of
moisture penetration into the semitrailer interior or outside of the outer walls or roof skins are not
acceptable. Water leakage is acceptable through the exhaust pipe stacks and bonnet side door
louvers; however, these areas shall be covered or taped prior to the test. In the event the body
fails to meet the water test requirement, rework the semitrailer body in accordance with 3.6.8.
4.5.10.8.1.2 Watertightness test body expanded. After the semitrailer body has
satisfactorily met 4.5.10.8.1 and 4.5.10.8.3, test the semitrailer body in the expanded mode.
Subject the expanded semitrailer to 4.5.10.8.1 for not less than 45 minutes while observing the
body for interior leakage. Water leakage or evidence of moisture penetration into the semitrailer
interior, including expanded walls, joints, corners, and seals are not acceptable. Water leakage is
acceptable through the exhaust pipe stacks and bonnet side door louvers, however, these areas
shall be covered or taped prior to the test. In the event the body fails to meet the water test
requirement, rework the semitrailer body in accordance with 3.6.8.
4.5.10.8.2 Optional test assemblage. To determine conformance to 3.6.8, an optional test
assemblage may be utilized in 4.5.10.8 to test the semitrailer body with bogie assembly and
landing gear assembly installed. The final performance requirements and the test method shall
remain the same.
4.5.10.8.3 M313, M447, M447C, and M447C Mod, models semitrailer, van bodies. To
determine conformance to 3.6.8, test the M313, M447, M447C, and M447C Mod. models of
semitrailer bodies for damage, interference, or binding to the extending or retracting
mechanisms, or walls and panels; and that all locks and fasteners are positive in locking and
fastening the extended portion in such a manner that they provide watertight and lightproof
joints. Perform the expansion/extension operations within a maximum of 90 minutes for the
M447C and M447C Mod. models, within a maximum of 30 minutes for the M313 model, and
within a maximum of 60 minutes for the M750 model; and with a maximum of three installers
using only equipment that will be furnished with the specific semitrailer. Expand the
semitrailers on relatively level surfaces, or level the semitrailers by using leveling jacks in
combination with the independently operated landing legs. Removal of storage containers from
the front deck is excluded from expansion time, and the leveling time shall be included.
4.5.10.9 M313, M447, and M750 models of semitrailers.
4.5.10.9.1 Heaters interface; and air conditioner interface for M313 and M447C models.
To determine conformance to 3.6.9.1 and 3.6.9.3, examine current and voltage output levels of
circuits supplying the semitrailer electrical system.
4.5.10.9.2 Air flow modulation. To determine conformance to 3.6.9.1, operate and
examine the damper rod and linkages.
20
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business