COUPLE TO TRAILER

TM 9-2320-312-10

OPERATION UNDER USUAL CONDITIONS - CONTINUED

0005 00

COUPLE TO TRAILER

NOTE

Refer to WP 0004 00 for the location of instrument panel and fifth wheel controls and indicators.

Begin operation with coupler jaws open. Ensure that manual secondary lock at fifth wheel is disengaged.

Back tractor up close to front of trailer. Be sure that throat of fifth wheel is aligned with trailer kingpin. Stop tractor

and set tractor parking brakes.

Ensure trailer wheels are blocked.

Connect service and emergency air lines and electrical line to trailer.

Apply trailer parking brakes.

Check to see that trailer is at proper coupling height. Front of bolster plate should contact fifth wheel approximately

4-6 in (10-15 cm) behind fifth wheel pivot point.

INITIAL CONTACT OF TRAILER WITH

FIFTH WHEEL AT THIS POINT

4-6 IN

(10-15 CM)

FIFTH WHEEL

MUST LIFT

TRAILER

FIFTH WHEEL TILTED DOWN

If coupling height is not OK, raise or lower fifth wheel (Refer to Operate Fifth Wheel Lift) or, if fifth wheel is already

fully lowered, raise trailer landing gear, using low gear.

WARNING

Use caution when coupling to trailer. BE ALERT for personnel in area. Ensure hands, arms, and body

are clear of potential pinch points. Failure to follow this warning may result in injury or death to person-

nel.

Slowly back tractor under trailer until pivot point of fifth wheel is under trailer. Stop tractor and raise fifth wheel until

fifth wheel plate is flush against underside of trailer.

Resume backing tractor until it is stopped by positive engagement of kingpin with fifth wheel. Jaws will automati-

cally lock.

0005 00-8

Change 1