Pacbrake 10475 User manual

10475 KIT
Ford Stripped Chassis F53 (Class A Motorhome)*
Use this heavy duty air suspension kit to level your truck’s stance
and eliminate your vehicle’s sag, sway and bottoming out while
providing added support for an overall smooth & safe ride.
L6559_REV1_01.13.2022 ECN 1-2565*See application guide for proper tment.

Ford Stripped Chassis F53 (Class A Motorhome) L6559
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Thank you and congratulations on the purchase of an air suspension kit. Please read the
entire manual prior to starting the installation to ensure you can complete it once started.
IMPORTANT
This air suspension kit will not increase the GVWR (Gross Vehicle Weight Rating), as the GVWR is determined by the vehicle
manufacturer. Do not exceed the maximum capacity listed by the vehicle manufacturer.
PLEASE NOTE
The air bag must have clearance between itself and the surrounding components to prevent any contact when bag is inated or
compressed. Trimming off excess bolt length is also required to ensure no contact with the air bag can be made once installed.
Safety Warnings!
Serious personal injury or death may result from an air spring failure or accident due to improper installation or air spring
pressure operation or maintenance. Please read and abide the instructions, safety recommendations and maintenance
suggestions throughout this manual.
Inating an unsecured air spring is dangerous. If it bursts, it could be hurled into the air with explosive force resulting in
serious personal injury or death. Never inate an air spring unless it is secured to the vehicle.
Removing and replacing air springs can be dangerous. This is only a job for a qualied service professional. Never perform air
spring service procedures without proper training, tools, and equipment.
KIT CONTENTS QTY PART #
AAir Bag 2 HP10068
BRoll Plate 4 HP10069
CBracket, Upper 2 HP0044
DBracket, Lower 2 HP1834
EBracket, Spacer 4 HP1835
FU-Bolt, 4 5/8" X 6 1/2" Square 4 HP1836
GBolt, 3/8” – 24 x 7/8” Hex Head 8 HP1002
HBolt, 3/8” – 16 x 1.5” Hex Head 8 C18018
IWasher, 3/8” Flat 16 C653
JWasher, 3/8” Thick Flat 8 HP1135
KWasher, 3/8” Flat, 1.25” OD 8 HP1013
LWasher, 3/8” Split Lock 8 C18007
MNut, 3/8” Nylon Lock 16 HP1000
NFitting, 90° Push-to-Connect 2 HP1245
REQUIRED TOOLS
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Hoist or Floor Jack
Safety Stands
Safety Glasses
Torque Wrench
Standard Combination Wrenches
7/32” Hex Allen Wrench
1-1/8” Wrench or Deep Socket
Ratchet
Metric & Standard Sockets
Hose Cutter (included) or Sharp Utility Knife
Pipe Thread Sealant
Spray Bottle with Dish Soap/Water
Air Compressor/Compressed Air Source (to
test/ll air springs)
KIT CONTENTS
Reference the kit explosion diagram on the following page for part assembly.
WARNING: This product can expose you to the chemical Hexavalent Chromate, which is known to the State of California to
cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

Ford Stripped Chassis F53 (Class A Motorhome) L6559
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A
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Please make sure all the items shown in this explosion diagram are provided in your kit before starting the installation.
DRIVER SIDE ASSEMBLY SHOWN:

Ford Stripped Chassis F53 (Class A Motorhome) L6559
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1 MEASURE STOCK RIDE HEIGHT
Park the vehicle on a level surface. Remove any unnecessary weight
from the vehicle to attain a Normal Ride Height. This is important for
correct initial air spring set-up and adjustment.
Using a measuring tape, measure the distance between the center
of the wheel hub and the bottom of the fender well (as shown in
Figure 1) this will give you your ride height.
Note the ride height for all four corners.
2 REMOVE REAR WHEELS
Place wheel chocks in front of and behind both front wheels.
Raise the rear of the truck high enough to remove both wheels and
attain a comfortable working height.
Place two jack stands under rear axle (shown in Figure 2).
Lower the vehicle until the axle is supported by the jack stands.
Remove rear wheels.
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2
BEFORE STARTING THE INSTALLATION:
1. Ensure the application information is correct for the make, model and year of the vehicle you are installing the kit on.
2. Some vehicles are equipped with a rear wheel brake proportioning valve. Check with the manufacturer before installing the air
spring kit, as it may affect braking performance.
3. It is recommended to use a good quality anti-seize on all fasteners. This will reduce the chance of corrosion on the fasteners
and will help facilitate removal, if required at a later date.
PLEASE NOTE:
This kit contains push-to-connect ttings; using scissors or wire cutters to cut the nylon airline will distort the line and cause
the connection to leak. THE AIRLINE MUST BE CUT OFF SQUARELY WITH THE NYLON HOSE CUTTER PROVIDED IN THIS KIT
OR A SHARP UTILITY KNIFE.

Ford Stripped Chassis F53 (Class A Motorhome) L6559
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3 ATTACH LOWER BRACKETS
Place a roll plate and lower bracket on the bottom of the air spring (as
shown in Figure 3).
Align all holes and attach with two 3/8” – 16 x 7/8” bolts, two 3/8” lock
washers and two 3/8” at washers.
Tighten fasteners nger tight to allow for spring alignment in later
step.
4 ATTACH UPPER BRACKETS
Install a swivel tting in 1/8” NPT port on top of the air spring.
Thread tting into air spring nger tight, plus an additional 1.5 turns.
Note: Some ttings have thread sealant pre-applied on threads, If
threads have no visible coating, apply thread sealant or Teon tape.
Place a roll plate and upper bracket on the top of the air spring (as
shown in Figure 4).
Align all holes and attach with two 3/8” – 16 x 7/8” bolts, two 3/8” lock
washers and two 3/8” at washers.
Tighten fasteners nger tight to allow for spring alignment in later
step.
5 MARKING UPPER BRACKET MOUNTING HOLES
PLEASE NOTE: These steps are important for correct kit setup.
• Ensure there is no unnecessary weight in the vehicle to attain
normal ride height.
• Also ensure the rear suspension is fully supporting the vehicle
weight.
Refer to the diagram (Figure 5) on the following page for assembly
installation requirements.
...Step continues on the following page
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4

Ford Stripped Chassis F53 (Class A Motorhome) L6559
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Place the air spring assembly on top of the leaf spring with the lower
bracket centered above the axle tube. Install the spacer brackets if
needed.
Position the upper bracket such that the mounting height requirement
is achieved and it is parallel to the lower bracket.
Note: Using clamps to clamp the upper bracket to the frame can help
hold it in place for ner adjustment and positioning.
When the correct position is attained, choose the best two mounting
holes on each side of the bracket and mark the centers. Maximum
hole spacing is recommended.
6 DRILL UPPER BRACKET MOUNTING HOLES
Remove the air spring assembly from the vehicle and drill four 11mm
[7/16” holes] through the frame in the marked locations
Use caution when drilling to not damage any wiring, fuel lines or other
vehicle components behind the drill location.
After drilling, paint the exposed metal to protect from rust or
corrosion
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MARKING UPPER BRACKET MOUNTING HOLES

Ford Stripped Chassis F53 (Class A Motorhome) L6559
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7 SECURE UPPER BRACKET
Place the air spring assembly back in the vehicle.
Secure the upper bracket to the frame using four 3/8” – 16 x 1.5”
bolts, 3/8” thick at washers, large OD washers and nylon lock nuts
as shown in Figure 7.
Torque all bolts to 40 ft-lbs [54 N•m]
8 SECURE LOWER BRACKET
Attach the lower bracket (and spacer brackets if used) to the leaf
spring with two U-bolts, four 3/8” at washers and four 3/8” nylon
lock nuts (as shown in Figure 8A).
Leave the fasteners loose at this time.
Position the air spring to achieve the best vertical alignment (as per
Figure 8B).
When spring is aligned, torque the upper and lower air spring bolts to
20 ft-lbs [27 N•m].
Secure the lower bracket by tightening the nuts on the U-bolts to 20
ft-lbs [27 N•m].
When fasteners are tight trim the excess U-bolt length such that it
does not extend above the lower edge of the roll plate.
WARNING: Failure to trim U-bolts can result in air bag puncture
during operation and may void your warranty.
9 INSTALL HEAT SHIELD
Bend tabs on the heat shield so the required ½” of dead space exists
between the heat shield and exhaust when attached.
Attach the heat shield to the exhaust pipe on passenger side using
two ring clamps (shown in Figure 9).
Each hose clamp holds a tab against exhaust pipe.
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8A
8B
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Ford Stripped Chassis F53 (Class A Motorhome) L6559
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10 INSTALL AIR LINE
PLEASE NOTE: This kit contains push-to-connect ttings; using
scissors or wire cutters to cut the nylon airline will distort the line
and cause the connection to leak. THE AIRLINE MUST BE CUT OFF
SQUARELY WITH THE NYLON HOSE CUTTER PROVIDED IN THIS KIT
OR A SHARP UTILITY KNIFE
Provided in air spring kit are two ll valves. The most common place
to install is in place of license plate fasteners. Alternatively, two 5/16”
holes can be drilled in a convenient location.
Cut air line assembly into two equal lengths with hose cutter.
Install one air line, route the nylon air line to an air spring tting and
cut the hose.
Moisten the end of the air line prior to inserting it into the tting and
push it in until it stops. Repeat with the other ll valve.
Secure airlines using the tie-straps, away from moving items and heat
sources.
Place a 5 ⁄16” nut on the air valve. Leave enough of the ination valve
in front of the nut to extend through the hole, install a at washer, and
5 ⁄16” nut and cap (reference Figure 10 for assembly).
There should be enough valve exposed after installation—
approximately ½”—to easily apply a pressure gauge or an air chuck.
If an in-cab ination kit is being installed, follow
the instructions provided with that kit now.
11 CHECK SYSTEM FOR LEAKS
Inate both air springs to 90 psi and then use a mixture of dish soap
and water on all air line connections to detect any air leaks.
Large, expanding bubbles indicate a leak (as shown in Figure 11).
Repair as necessary and retest.
Inate air springs to a predetermined value and on following day
recheck pressure.
If one or both of air springs have lost pressure, an air leak is present.
Leak must be repaired, and then retested until no leaks exist.
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Ford Stripped Chassis F53 (Class A Motorhome) L6559
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AFTER COMPLETING THE INSTALLATION
PLEASE REMEMBER:
Install wheels and torque fasteners to manufacturer’s specications.
Re-torque all fasteners after rst 500 miles of driving.
For safe and proper operation, never operate the vehicle under
minimum of 10 psi or over maximum of 100 psi in air springs. Staying
within pressure limit will ensure maximum air spring life. Failure in
doing so may result in a void warranty (see Note below).
NOTE: Do not exceed maximum vehicle payload. Failure to do so
my result in failure of the air suspension kit and/or damage to your
vehicle.
Thank you again, and congratulations on the installation of the air suspension kit.
OPTIONAL ACCESSORIES
Optional dual needle air gauges are available to monitor pressure in each spring from vehicle cab, as well as a full line of air
compressors, air tanks, and solenoids built to work with and control your air spring system.
OPERATING YOUR VEHICLE WITH AIR SUSPENSION
Air springs have minimum and maximum pressure requirements. Never operate your vehicle with less than 10 psi in air spring and
never inate air springs over 100 psi. Damage to air springs will result.
Check air pressure in air springs daily for rst couple of days to ensure a leak has not developed. Air springs are designed to
maintain the vehicles stock ride height with a load. Do not use the air springs as a means to lift vehicle with no load. This will result
in a harsh ride.
SERVICING YOUR VEHICLE WITH AIR SUSPENSION
When lifting the vehicle with a oor jack or hoist on the frame, never allow the air spring to limit the travel of the axle. Try to always
jack the vehicle on the axle. Suspending the axle with the air spring limiting the axle travel will damage the air spring and void the
air spring warranty.
WARRANTY
To be eligible for warranty, the owner must submit their warranty card or register online within 30 days of the purchase date.
NOTE: The owner’s warranty will be void if air springs are run with less than the minimum of 10 psi.