Page 58 - 2021-2022 Commercial Drivers Manual

SECTION 6 : COMBINATION VEHICLES

• Tighten in both the lock screws (2, 2a) to- • Loosen safety lock screw (2a) and remove Step 3. Install Safety Pin and Clip

gether with their relative self-locking nuts (12, safety lock screw (2) together with its self- • Install safety pin and clip. (Fig. B)

12a) at a 350 to 400 Nm torque wrench setting. locking nut (12).

Step 5. Adjust the Adjustment Screw Step 3. Rotate Safety Cover Bar and Lift
Trailer Drawbeam

• Adjust the adjustment screw (3) until a 0.3 -

0.5 mm vertical clearance between the guard • Rotate the safety cover bar (4) outwards so

disk (13) and the ball cup (6) is reached. Lock that it is completely open.
setting with counter nut (11).

• Lift the trailer drawbeam until the drawbar
coupling ball (5) is fully visible, then travel
forward with the trailer very slowly.
• Rotate the safety cover bar inwards (4) until

it lodges back in its housing.

Step 4. Lock Safety Screw and Tighten Figure B

Self-Locking Nut
• Fit in safety lock screw (2) and tighten in self- 6.5 – Inspecting a

locking nut (12). Combination Vehicle
6.4.7 – Coupling a Gooseneck Hitch Use the seven-step inspection procedure de-
scribed in Section 2 to inspect your combination

• If you are hooking up a Gooseneck or a fifth
wheel hitch, the procedure is a little different vehicle. There are more things to inspect on a
from a receiver and ball, but it is not more combination vehicle than on a single vehicle.
difficult. (For example, tires, wheels, lights, reflectors,
etc.) However, there are also some new things
to check. These are discussed below.

Step 1. Open the Latch and Lubricate the
Gooseneck Ball 6.5.1 – Additional Things to Check
• Open the clamp latch on the Gooseneck During a Walk-around Inspection

coupler.
Do these checks in addition to those already
• In the event that the safety cover bar (4) will • Make sure that the Gooseneck ball is properly listed in Section 2.

not perfectly lodge into its seating appropri- lubricated. Coupling System Areas
ately, travel is strictly forbidden.

Step 2. Position Coupler and Latch the • Check fifth wheel (lower).

Clamp » Securely mounted to frame.

» No missing or damaged parts.
• Position the trailer’s coupler directly over » Enough grease.

the ball and lower the Gooseneck trailer into » No visible space between upper and lower

position and latch the clamp.
fifth wheel.
» Locking jaws around the shank, not the

Step 3. Attach Safety Chains
head of kingpin. See Figure 6.8.

• Attach your safety chains. Remember that » Release arm properly seated and safety
all trailers are required by law to have safety latch/lock engaged.
chains.
Step 6. Protect Coupling Ball and Anchor Step 4. Connect Trailer Light Wiring

Edge onto Ball

• Connect your trailer light wiring to your ve-

• Protect the part that is still visible of the cou- hicle’s connector.
pling ball (5) with the rubber dust proof bel- • Check all of your lights, including your brake

lows protection cover (7). Accurately anchor lights.
the edge directly onto the ball itself.
Step 7. Lubricate the Drawbar Eye Step 5. Lower and Stow the Trailer Jacks
• Completely lower and stow the trailer jacks,

• Lubricate the inside of the drawbar eye ball

cup (6) directly through the grease nipple (18). allowing the weight to settle onto the tow
vehicle.
6.4.6 – Uncoupling a Drawbar
6.4.8 Uncoupling a Gooseneck Hitch

–
Step 1. Turn Trailer Brake On
Step 1. Remove Safety Pin and Clip

• Make sure that the trailer brake is on.

• Simply remove safety pin and clip. Figure 6.8
Step 2. Remove Cover and Loosen Screws

Step 2. Rotate Handle and Raise Trailer • Check fifth wheel (upper).

• Remove the rubber dust proof bellows protec- Off Ball » Glide plate securely mounted to trailer

tion cover (7). frame.

• Rotate handle to this position (Fig. B) and » Kingpin not damaged.

• Loosen the adjustment screw (3) and the raise trailer off ball. Coupler will return to

counter nut (11). load position automatically.
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