TM-9-2320-260-10
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; OPERATOR'S MANUAL
JUNE 1985
TM-9-2320-260-10 - Page 225 of 411
Change 1
2-149
TM 9-2320-260-10
c. Uncoupling the Semitrailer.
(1)
Start engine (refer to paragraphs 2-12 and 2-13).
(2)
Move vehicle to where semitrailer is to be parked.
(3)
Move semitrailer airbrake hand control lever (2) to ON (lever down) position.
(4)
Apply parking brake (4).
(5)
Move gearshift lever (3) to “N” (neutral) position.
(6)
Lower semitrailer landing gear (11) and install chock blocks.
(7)
Disconnect electrical cable connector (13) from semitrailer receptacle (12) and secure in
hose support.
(8)
To release semitrailer kingpin (6), move locking plunger safety latch (9) to release locking
plunger.
(9)
Move locking plunger lever (8) all the way forward to unlock coupling jaws (10).
NOTE
Step 10 applies to M818 vehicles only (replacement fifth wheel).
(10)
To release semitrailer kingpin (6), pull plunger handle (17) forward, then out to open fifth
wheel coupling jaws (18) (M818 only).
(11)
Release parking brake (4) and place transmission gearshift lever (3) in “1” (first) gear.
(12)
Slowly move tractor forward until fifth wheel (7) is clear of semitrailer skid plates.
(13)
Stop engine (refer to paragraph 2-16).
(14)
Apply parking brake (4).
(15)
Move semitrailer airbrake hand control lever (2) to OFF (lever up) position.
.
WARNING
.
Except where specifically noted, these systems and components are
generally applicable to all vehicles covered in this manual.
(16)
Move air valve handles (19) to OFF position.
(17)
Disconnect emergency and service brake hose half couplings (20) from semitrailer half
couplings (21) and secure hoses on air hose supports.
ON M818 VEHICLE ONLY
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