2-2. FLOAT PADS (GROUND BOARD ASSEMBLIES)
For fifth wheel heights of 62 inches, as on
the M1088, it is recommended that the
ground boards are placed under the
extended, and locked, scissors landing leg
feet on the M871A3. Attempting to couple
the tractor with the semitrailer below the
fifth wheel height may cause injury to the
personnel and damage to the equipment.
Ground boards should be used both on soft
and hard surfaces to preclude equipment
removing/installing ground boards. Injury
to fingers/hand can occur.
Two float pads (1) (ground board assemblies)
are provided for placing under landing leg feet
to keep them from sinking into soft ground.
Stored in brackets (2) welded to frame.
Chain (3) is hooked on frame. Snap hook (4) is
provided to take up slack in chain (3).
As needed, remove float pad (1) for use under
2-3. NOSE PLATE
Service Air uses a blue seal, Emergency Air
uses a red seal. Do not cross
Service/Emergency air lines at glad-hands.
Make sure they are hooked up correctly to
meet brake air pressure requirements.
The nose plate (1) has the connections for the
air lines and electrical cables from the towing
vehicle to the semitrailer.
Service gladhand (2) and emergency gladhand
(3) couplings provide the connection between
the semitrailer brake system and the towing
vehicle air supply system.
Electrical receptacles (4 and 5) provide the
connections between the semitrailer lights and
the towing vehicle electrical system. Both
receptacles use spring loaded covers to keep
foreign matter out when the cables are
disconnected. The left (roadside) receptacle
(4) is for 12 volt; the right (curbside) receptacle
(5) is for 24 volt.