Landoll L20 Series, Руководство оператора

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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 hitch on the trailer can be adjusted
to different 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 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, but needs some adjustment to
connect to the truck, manually raise or lower
the front of trailer by cranking the landing
gear (parking stands) up or down until the
proper height has been obtained.
3-2.4 For trailer with air brakes:
a. Connect the service and emergency air
hoses of the towing vehicle to their respective
gladhand on the front of the trailer. 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) . Chock the trailer wheels
before activating the trailer air supply valve in
the towing vehicle. Set the trailer brakes.
b. 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 immediately. Air pressure
should discharge quickly from the relay
emergency 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 and activate the trailer air
supply valve. The trailer brakes should
set.
3-2.5 For trailer with electric brakes:
a. Connect electrical receptacle to the truck.
(See Figures 3-2 and 3-3).
b. Apply brakes and inspect brake action on all
wheels for prompt application.
3-2
Figure 3-1 Service Hookups (Front View) - Air
Brakes
Figure 3-2 Service Hookups(Front View)-Electric
Brakes