Pre-Coupling Of Trailer And Truck - Landoll 345B Operator's Manual

3-2 PRE-COUPLING OF TRAILER AND TRUCK

3-2.1 Slowly back the truck (towing vehicle)
up to the front end of the trailer so the hitch
of the trailer is centered with the truck. Stop
the towing vehicle just inches ahead of the
trailer. Set truck parking brake.
3-2.2 The bolt on hitch can be adjusted to dif-
ferent heights. Make sure the hitch height is
at the correct height so the trailer deck is
about parallel to the ground when loaded.
3-2.3 Make sure the towing truck hitch height
is at the correct height so the trailer deck is
about parallel to the ground when loaded.
CAUTION
OPERATING PRESSURES GREATER
THAN 2500 PSI CAN CAUSE DAMAGE
TO THE TRAILER.
Figure 3-1 Service Hookups
3-2
3-2.4 If the trailer hydraulics are powered by
the truck hydraulics clean the hydraulic quick
couplers and connect the trailer to the truck
hydraulic couplers. If trailer is equipped with
auxiliary engine hydraulic power start the en-
gine and, after warm up, advance throttle to
desired speed.
3-2.5 Check the trailer hitch height. The hitch
should be the same height, to slightly higher,
than the hitch of the towing vehicle. If the
trailer hitch is bolted to the trailer at the cor-
rect height, according to Steps 3-2.2 and
3-2.3, raise or lower the hitch by operating
the bed tilt hydraulics until the proper height
has been obtained.
WARNING
F A I LU R E T O C H OC K T R A I L E R
WHEELS COULD ALLOW MOVEMENT
OF THE TRAILER RESULTING IN SERI-
OUS PERSONAL INJURY, DEATH, OR
DAMAGE TO PROPERTY IN ITS PATH.
3-2.6 Connect the service and emergency air
hoses of the towing vehicle to their respec-
tive gladhand on the towing truck. The tow-
ing vehicle's air hose couplings are attached
and locked to the appropriate gladhands; red
emergency line to the gladhand with the
"EMERGENCY" tag, and the blue service
line to the gladhand with the "SERVICE"
tag (See Figure 3-1).
a. Check the air brake operations of the trailer
as follows:
1. Apply brakes and inspect brake action on
all wheels for prompt application.
2. Release brakes. All brakes should release
i mme dia tel y. A i r p ressure sh ould
discharge quickly from the booster valve.
3. Disconnect the emergency air line from the
trailer gladhand. Trailer brakes should
promptly set.
4. Re-connect the emergency air line to the
trailer. The trailer brakes should release.
b. Set the trailer brakes.