Installation Guide

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PARTS LIST
CALCULATING THE
HEIGHT OF THE ASSEMBLY
UNPACKING THE 5TH WHEEL
Item# DescriptionQty
1 1 Q24 5th wheel head assembled to mid-section
2 2 Legs
3 4 Pilot hex bolts, M14 - 2 x 45mm
4 4 Flat washers, 14mm
5 4 Lock washers, 14mm
6 4 Base rail mounting pins, 1/2" diameter
7 4 Hair pin clips for base rail mounting pins
Assembly includes measuring the height requirement for the
Q24 5th wheel head in relation to your trailer ride height at
the kingpin box and skid plate. Ideally the trailer should ride
as near to level as possible. The Q24 5th wheel is adjustable
from 13" to 17", from the pickup bed to the top of its skid
plate. Adjustment is attained by adjusting the mid-section
up or down, in relation to the legs, in 2" increments (typical
clearance between the pickup bed rails and the trailer
should be a minimum of 5 1/2").
Step 1
With your trailer on a firm and level surface, set chock blocks
in front of and behind the tires. (Do not substitute wood
blocks, rocks, etc. for chock blocks.) Extend front trailer
lifting jacks, adjust as required to set trailer at or near level.
Your Q24 5th wheel hitch has been partially assembled,
inspected and tested for fit, function and completeness.
The Q24 5th wheel hitch is an engineered unit that has been
designed and tested at the rating of 24,000 lbs. GTW.
Be sure that the leg with the warning and instruction labels
is placed on the side of the unit with the activation bar.
Figure 1
ASSEMBLY & INSTALLATION
Once you have determined the height adjustment
required for your Q24 5th wheel, assemble the legs to
the mid-section using the appropriate holes. Occasionally,
the trailer's kingpin 'pin box' will require adjustment to
facilitate correct ride height.
IMPORTANT: Torque the four pilot bolts to 100 foot lbs.
Re-torque after initial 500 miles and every 1,000 miles
thereafter and prior to each individual use.
Step 1
Depending on which holes are selected, attachment of the
legs to the mid-section may be easier with the mid-section
upside-down sitting on its skid plate.
Step 2
The head assembly can be removed from the mid-section
to further aid in the installation of the pilot bolts.
Step 3
If the Q24 5th wheel is being mounted to existing bed
mounting rails, and alignment issues arise, it may be
necessary to proceed as follows:
Loosely assemble the legs to the Q24 5th wheel mid-
section. Place the unit on top of the existing bed mounting
rails, aligning the foot tabs with the outermost rectangular
slots of the mounting rails. When the 5th wheel foot tabs
drop into the four rectangular slots, pin the foot tabs using
the four pins & clips provided. Continue assembly by
tightening the pilot hex bolts to 100 foot lbs.
If difficulty is still experienced fitting the Q24 5th wheel
to the existing bed mounting rails, it may be necessary to
loosen the mounting rail bolts and realign the mounting rails
as required to facilitate installation. It is recommended to
replace old lock washers with new lock washers at this time.
Torque mounting rail bolts to 75 foot lbs. Continue with the
Q24 installation by tightening the pilot bolts to 100 foot lbs.
If using new bed mounting rails, follow the mounting rail's
instructions for proper placement, alignment and spacing.
ASSEMBLY
Step 2
Measure from the ground to under the trailer's kingpin box
skid plate (or lube plate if used). This will be the portion in
contact with the Q24 5th wheel's skid plate once coupled.
Step 3
Measure from the ground to the surface of the pickup bed.
Step 4
Subtract the measurement from Step 2 from Step 1. This
value will be near the height requirement for the Q24 5th wheel.
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