TM 9-2330-235-14&P
CHAPTER 2
OPERATING INSTRUCTIONS
Section I.
DESCRIPTION AND USE OF OPERATOR'S
CONTROLS AND INDICATORS
Page
Paragraph Title
Number
General............................................................................................................................................................
Handbrake Levers ...........................................................................................................................................
Retractable Support Assemblies .....................................................................................................................
2-1.
GENERAL.
This section describes the function of all operator's controls and indicators on the M514 and M390C Chassis
Trailers. Review this section thoroughly before operating the trailer. Refer to paragraph 1-7 for illustrations showing the
location of operator controls.
2-2.
HANDBRAKE LEVERS.
a. M514. The two handbrake levers are located near the front of the trailer, one beneath each front leveling
jack support assembly. Pull handbrake levers toward front of trailer to apply brakes. Push handbrake levers toward rear
of trailer to release brakes.
b. M390C. The two handbrake levers are located near the front of the trailer, one on each side of the trailer
drawbar. Raise handbrake levers to vertical position to apply brakes. Lower handbrake levers to horizontal position to
release brakes.
2-3.
RETRACTABLE SUPPORT ASSEMBLIES.
a.
M514.
(1) The retractable support assembly is used for supporting the front of the trailer when not coupled to a
towing vehicle. There is no height adjustment on the M514 retractable support assembly.
(2)
Pull out on spring-loaded lockpin to allow retractable support assembly to be raised or lowered.
(3)
Lock in raised position with gravity pin inserted through support and frame clevis.
b.
M390C.
(1)
The retractable support assembly is used for supporting the front of the trailer when not coupled to a
towing vehicle.
(2) The retractable support assembly consists of a handcrank-operated, screw-type square leg equipped
with two metal wheels.
(3) The retractable support assembly handcrank, located on the back side of the support leg, is bolted to
the retractable support assembly input bevel gear. A handcrank is turned to raise or lower the support leg and is stowed
when not in use on a retaining clip on the support leg.
2-1
