Lippert Components Air Ride 155925 Installation instructions

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lci1.com 574-537-8900 Rev: 10.08.19
Air Ride™Pin Box
Installation and Owner’s Manual
(For Aftermarket Applications)
CCD-0001741
Table of Contents
Introduction ............................................ 2
Safety ................................................... 2
Parts List ................................................ 2
Resources Required ................................... 2
Installation .............................................. 3
Operation ............................................... 4
Pull Test ............................................... 4
Troubleshooting ........................................ 5
Maintenance ............................................ 6
Notes .................................................... 6
Air RideTM Pin Box
Installation and
Owner’s Manual
(For Aftermarket Applications)
Air Ride Pin Box KitsAir Ride Pin Box Kits
Part #Part # DescriptionDescription
155925 21K L03 Air Ride Pin Box
158778 21K L05 Air Ride Pin Box
158777 21K L07 Air Ride Pin Box
179879 18K M15 Air Ride Pin Box
155943 21K M19 Air Ride Pin Box

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lci1.com 574-537-8900 Rev: 10.08.19
Air Ride™Pin Box
Installation and Owner’s Manual
(For Aftermarket Applications)
CCD-0001741
THE “CAUTION” SYMBOL ABOVE IS A SIGN THAT
A PROCEDURE HAS A RISK INVOLVED THAT MAY
CAUSE PERSONAL INJURY AND/OR PRODUCT
DAMAGE IF NOT PERFORMED SAFELY AND WITHIN
THE PARAMETERS SET FORTH WITHIN THIS
MANUAL.
LetterLetter PNPN DescriptionDescription
A156740 Tank Valve
B177223 Oil Shock
C432404 Air Spring
Introduction
Trailair was first-to-market with Air Ride™for 5th Wheels
and still leads the way with innovative 5th Wheel pin box
technology. The new Air Ride Pin Box uses time-tested
Trailair air ride technology to provide an unparalleled ride,
eliminating chucking and the vertical tug-of-war between
the 5th Wheel and tow vehicle.
Additional information about this product can be obtained
from lci1.com/support or by using the myLCI app.
Replacement kits can be ordered from https://store.lci1.
com/ or by using the myLCI app.
The myLCI app is available for free on iTunes®for iPhone®
and iPad®and also on Google Play™for Android™users.
iTunes®, iPhone®, and iPad®are registered trademarks of
Apple Inc.
Google Play™and Android™are trademarks of Google Inc.
Safety
Read and fully understand all instructions before installing
or operating this product.
Adhere to all safety labels.
Parts List
Resources Required
• 2-3 people, depending on
task
• Safety glasses
• Tape measure
• Air compressor
• Wrench and socket set
• Box end wrenches
• Level
A
B C
THE “WARNING” SYMBOL ABOVE IS A SIGN THAT A
PROCEDURE HAS A SAFETY RISK INVOLVED THAT
MAY CAUSE DEATH, SERIOUS PERSONAL INJURY,
SEVERE PRODUCT AND/OR PROPERTY DAMAGE
IF NOT PERFORMED SAFELY AND WITHIN THE
PARAMETERS SET FORTH WITHIN THIS MANUAL.
NOTE: Part numbers are shown for identification purposes
only. Not all parts are available for individual sale. All parts
with a link to the Lippert Store can be purchased.
Make sure pin box is sufficiently and properly supported
before removing mounting hardware.
Prior to new pin box installation, make sure air bag on new
pin box is not overinflated.

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lci1.com 574-537-8900 Rev: 10.08.19
Air Ride™Pin Box
Installation and Owner’s Manual
(For Aftermarket Applications)
CCD-0001741
Installation
NOTE: The pin box assembly weighs several hundred
pounds. A minimum of two people are required to complete
the removal and installation of the pin boxes. A forklift may
be used to lift the pin box into position.
NOTE: The 5th Wheel should always be towed while level.
Adjustment of the pin box mounting height, the tow vehicle
height or suspension may be necessary to accomplish a
level towing condition. 3. Properly support the pin box assembly.
4. Remove fasteners holding the original pin box in place.
5. Remove original pin box. Retain mounting fasteners
for reuse.
6. Hoist the new pin box into place.
7. When installing the new pin box, measure from the
ground up to the at plate of the upper jaw of the pin box.
Once the new pin box is aligned, that measurement should
be equal to the measurement taken in step 2 plus 11 ¾”.
Record this dimension as B (Fig.2).
8. Reinstall previously removed fasteners (step 4).
NOTE: Use the same amount of fasteners as were
previously used. If any nuts, bolts or washers are damaged
or unusable, replace with new fasteners equivalent in style,
grade and diameter as original hardware.
A
Ground
Fig.1
B = A + 11 ¾”
Ground
Fig.2
MOVING PARTS CAN PINCH, CRUSH OR CUT. KEEP
CLEAR AND USE CAUTION.
AN UNSUPPORTED PIN BOX DURING PRODUCT
REMOVAL CAN RESULT IN DEATH, SERIOUS
PERSONAL INJURY, SEVERE PRODUCT AND/OR
PROPERTY DAMAGE. PROPERLY SUPPORT PIN BOX
BEFORE REMOVING MOUNTING BOLTS.
1. Level the trailer front-to-back.
2. Measure from the ground to the bottom of the kingpin
plate on the current pin box. Record this dimension as
A (Fig.1).

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lci1.com 574-537-8900 Rev: 10.08.19
Air Ride™Pin Box
Installation and Owner’s Manual
(For Aftermarket Applications)
CCD-0001741
9. Torque pin box bolts and nuts accordingly:
• Torque ½” bolts to 110 ft-lbs minimum.
• Torque 5/8” bolts to 160 ft-lbs minimum.
• Torque ¾” bolts to 210 ft-lbs minimum.
10. Make sure that the 5th wheel coupler located in
the tow vehicle is mounted according to the proper
instructions of the 5th Wheel manufacturer. In addition,
make sure that it is in good working condition. A non- or
poor-working coupler will a󰀨ect pin box performance,
resulting in an unsafe towing condition. Make sure the 5th
Wheel connection is never located behind the center of the
drive axle.
11. After all nuts and bolts have been tightened, attach
trailer to tow vehicle. Before applying the air nozzle tting
at the top of the pin box, make sure the alignment pin is in
the hole on the bottom of the air spring.
12. With the tow vehicle at rest, inate the air bag with
enough air to raise the pin box to the ride height mark
on the front of the shock absorber (Fig.3A). The starting
pressure should be around 80-90 psi, with the pressure
increased according to the ride height mark. However, the
Fig.3
B
A
THE AIR BAG CAN LOSE AIR OVER TIME, RESULTING IN
REDUCED OR LOSS OF PRODUCT PERFORMANCE. REDUCED
OR LOSS OF PRODUCT PERFORMANCE CAN CAUSE
PRODUCT AND/OR PROPERTY DAMAGE. ALWAYS VERIFY
CORRECT LEVEL AGAINST THE SHOCK’S HEIGHT MARK AND
TRAILER BEFORE TRAVELING. ADJUST AIR PRESSURE AS
NECESSARY TO ACHIEVE CORRECT PIN BOX LEVEL.
AN OVERINFLATED AIR BAG CAN BURST, RESULTING IN
DEATH, SERIOUS PERSONAL INJURY, SEVERE PRODUCT
AND/OR PROPERTY DAMAGE. DO NOT OVERINFLATE AIR
BAG. INFLATE AIR BAG TO RIDE HEIGHT LEVEL IDENTIFIED
ON THE SHOCK ABSORBER.
AN UNSECURED AIR SPRING DURING INFLATION CAN CAUSE
PERSONAL INJURY. MAKE SURE AIR SPRING IS PROPERLY
SECURED TO THE PIN BOX BEFORE INFLATING. INSTALL AIR
CAP TO SAFELY COMPLETE AIR SPRING INFLATION.
pressure is not to exceed 120 psi. Filling should be stopped
when reaching either the ride height mark or 120 psi,
whichever comes rst. The minimum pressure is 45 psi.
13. Check the air pressure level on the air bag before each
use and adjust accordingly.
Operation
Pull Test
1. Make sure the trailer wheels are blocked, the trailer
landing gear is resting on rm ground to support the
trailer and the tow vehicle is in park with the emergency
brake engaged.
2. Return to the cab of the tow vehicle, release the
emergency brake and then apply the trailer brakes.

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lci1.com 574-537-8900 Rev: 10.08.19
Air Ride™Pin Box
Installation and Owner’s Manual
(For Aftermarket Applications)
CCD-0001741
What is happening?What is happening? What should be done?What should be done?
Trailer not level. Adjust pin box or hitch
accordingly.
Excessive chucking in tow
vehicle.
Inspect pin box air bag air
pressure. Add or remove
air to recommended point.
If low, check for leaks and
replace if needed.
Excessive noise from pin
box area.
Verify that the pin box is
securely attached to the
5th wheel. If the king pin
is excessively worn, the
jaw plate will need to be
replaced. Check pressure
in air bag and replace if not
holding air. Look for damage
on shock or a disconnected
shock. Reconnect or replace
shock if needed.
Hitch mechanisms can
also cause noise. Verify
that unwanted noise is not
coming from the hitch. The
hitch manufacturer can
provide guidelines for this
check.
Troubleshooting
FAILURE TO PERFORM A PULL TEST MAY RESULT IN
SEVERE PROPERTY DAMAGE, SERIOUS PERSONAL
INJURY OR DEATH. FAILURE TO SECURE TOW
VEHICLE AND TRAILER FROM MOVEMENT DURING
PROCEDURE COULD RESULT IN SEVERE PROPERTY
DAMAGE, SERIOUS PERSONAL INJURY OR DEATH.
MAKE SURE TOW VEHICLE AND TRAILER ARE
PROPERLY SECURED AGAINST MOVEMENT DURING
THE PROCEDURE.
3. Slowly pull the trailer forward with the tow vehicle.
A. If the tow vehicle is properly hitched, the wheel blocks
and trailer brakes should keep the truck from moving
forward.
B. If the trailer is not properly hitched, the trailer will
separate from the hitch and the truck will move forward
while leaving the trailer behind. If this happens, repeat
hitching procedure.
4. After successfully performing the pull test, fully raise the
landing gear per manufacturer’s recommendations.
5. Check and inspect all electrical circuits for proper
operation, to include clearance lights, turn signals and stop
lights.
6. Remove and store all trailer wheel blocks.

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lci1.com 574-537-8900 Rev: 10.08.19
Air Ride™Pin Box
Installation and Owner’s Manual
(For Aftermarket Applications)
CCD-0001741
Notes
Maintenance
Periodically check the recess on the top of the pin box
(Fig.3B) for standing water. Drain water and remove debris
as needed. The area should be clean and clear of all
contaminants.
The pin box air bag can lose air over time. Always check
pin box and that trailer is level before traveling. Adjust
air bag air pressure as necessary to achieve proper ride
height.

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lci1.com 574-537-8900 Rev: 10.08.19
Air Ride™Pin Box
Installation and Owner’s Manual
(For Aftermarket Applications)
CCD-0001741
Notes

8
lci1.com 574-537-8900 Rev: 10.08.19
Air Ride™Pin Box
Installation and Owner’s Manual
(For Aftermarket Applications)
CCD-0001741
Manual information may be distributed as a complete
document only, unless Lippert Components provides
explicit consent to distribute individual parts.
All manual information is subject to change without
notice. Revised editions will be available for free
download at lci1.com. Manual information is considered
factual until made obsolete by a revised version.
Please recycle all obsolete materials and contact
Lippert Components with concerns or questions.
Notes