AccuAir ENDO-CVT23 User manual

AccuAir ENDO-CVT Instruction Manual V 1.2 AccuAir Suspension 2018
INSTRUCTION MANUAL

AccuAir Control Systems, L.L.C.
Attn: Service Department/RMA # ______
831 Buckley Rd.
San Luis Obispo, Ca, 93401
USA
TERMS & CONDITIONS:
AccuAir Control Systems, L.L.C. is hereby referred to as ACCUAIR. The Purchaser, end-user, or installer is hereby referred to
collectively as CUSTOMER. By purchasing and installing the ACCUAIR products, systems, or components to which this Installation
Manual relates, CUSTOMER is deemed to agree with and accept the terms and conditions below.
2 Year Compressor Warranty
ACCUAIR will repair or replace any defective products or components of the ENDO-CVT™ excluding the air compressor itself (see
compressor warranty below) for the life of the vehicle on which they were originally installed, provided that the products or
components were installed exactly as instructed herein, not modified or altered, and operated as expressly intended by ACCUAIR.
ACCUAIR will repair or replace the air compressor if it is proven defective within a 2-YEAR time period from the date of purchase.
Upon the return of a failed component(s) at CUSTOMER’s expense, ACCUAIR will determine the cause of failure. If it is due to
improper installation or misuse of the system, as determined by ACCUAIR, a repair charge will be assessed, and the customer will
be contacted before work is performed or replacement parts are shipped. If the failure is due to defectively manufactured parts, then
ACCUAIR will either repair or replace the failed components, at their own discretion and in a timely manner. There are no other
warranties, express or implied, except as contained in this paragraph.
Repairs and Returns
A Return Merchandise Authorization Number (RMA) is required for ALL shipments to ACCUAIR. This number should be written in
large letters on the shipping box. Call ACCUAIR to receive an RMA number and send items to:
Legal Disclaimer (IMPORTANT—PLEASE READ CAREFULLY)
•ACCUAIR’s products are intended and designed for off-road use. If a customer chooses to use ACCUAIR’s products on a highway,
CUSTOMER understands that they do so at their own risk.
• ACCUAIR’s products must be installed by a qualified professional installation facility, as recommended by ACCUAIR.
• ACCUAIR’s products may void or limit any manufacturer’s warranty or service contract covering CUSTOMER’s vehicle. ACCUAIR
shall have no liability for any effect that installation of its products may have on such warranties or service contracts.
• ACCUAIR’s products may drastically alter the performance characteristics of CUSTOMER’s vehicle and may cause it to operate in
a manner not intended by the vehicle’s original manufacturer. System operation and installation is at the CUSTOMER’s own risk.
• CUSTOMER is responsible for periodically inspecting any and all ACCUAIR products or components installed on CUSTOMER’s
vehicle, to ensure they remain safe and functional. ACCUAIR shall have no liability for any loss or injury caused by CUSTOMER’s
failure to inspect.
• ACCUAIR shall have no liability for damage to property or persons caused by its products, components, accessories, installation
instructions, or otherwise. CUSTOMER alone assumes all such risks and liabilities.
• ACCUAIR accepts no responsibility for systems, products or components provided by other manufacturers for use with or around
the ACCUAIR system. For components other than ACCUAIR’s, follow the manufacturer’s instructions for installation and operation.
• ACCUAIR’s liability, if any, shall be limited to the replacement cost of the purchased product or component.
• Any and all disputes between ACCUAIR and CUSTOMER relating to the purchase or installation of an ACCUAIR product or
component must be resolved through final and binding arbitration, applying the laws of the State of California, and conducted
pursuant to the California Arbitration Act (California Civil Code sections 1280, et seq.). Arbitration shall take place in San Luis Obispo,
California, and CUSTOMER consents to personal jurisdiction in California.
WARNING: No part of the vehicle should be able to contact
the ground when all air is out of the Air Springs.
!
ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

INSTALLATION AND OPERATING INSTRUCTIONS
TABLE OF CONTENTS:
What to expect from ENDO-CVT™
ENDO-CVT™ Installation Checklist
Air Pressure Limits / System Features
Specifications
System Diagram
System Wiring
ENDO-CVT System Diagnostics
Using the QR Mount
Vehicle Standard Mounting
Vehicle Side Mounting
ENDO-CVT™ Flow Adjustment
ENDO-CVT™ PTC Service Instructions
Removing the End Caps
E-Level Tank Pressure Mode
ENDO-CVT™ Feature Overview
1
2
3
4
5
6
7
8
9
10
11-12
13
14
15
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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018
WHAT TO EXPECT FROM ENDO-CVT™
Congratulations on purchasing the highly innovative ENDO-CVT™ (Compressor Valve Tank). Carefully follow these
instructions to ensure years of safe and reliable operation of your ENDO-CVT system. CVT is unique in multiple ways from
conventional air compressor systems and highlighted below are some of the distinctions to expect:
POWER WIRING - The ENDO-CVT™ comes with 4 ft (1.2 m) long ground cable and 7.5 ft (2.3 m) long power cable adequate for
rear mounted battery scenarios. When extending the cable for front mounted batteries, AccuAir suggests using a 6 awg cable size
for running up to an additional 20 feet (6 m). AccuAir sells a power extension harness if desired.
LOW VOLTAGE SHUTOFF - The ENDO-CVT™ automatically monitors the supplied battery voltage. If the battery voltage reaches
below 9.0 volts, the compressor will turn OFF until the battery voltage is increased to above 11.0 volts.The compressor pumps
fastest while the vehicle is running and charging (13.8 volts or higher).
PRESSURE RANGE - The ENDO-CVT™ will begin pumping anytime the pressure is below 160 psi (11 BAR), the vehicle ignition
switch is turned ON, and the compressor head temperature is below the maximum limit. After starting, the compressor will
continue to pressurize the reservoir until 200 psi (13.6 BAR) (the status indicator will flash green more quickly as pressure builds)
and then purge off between 5 and 30 psi depending on the current climate and humidity level and the condition of the internal
desiccant air dryer.
HEAT - It is normal for your entire ENDO-CVT™ to become warm or even hot to the touch as the reservoir acts as a massive heat
sink for the compressor. AccuAir has built-in a compressor head temperature sensor and an automatic shut-off when the
compressor head temp reaches 203F (95C) indicated by a slow red flash on the status indicator. If you reach the 95C shut-off while
you are in a precarious situation and require a little more air immediately, you can cycle your ignition OFF then ON within a 30
second time period to force the compressor to run until 221F (105C) if required, indicated by a fast red flash on the status indicator.
NOISE LEVEL - AccuAir has gone to great extents to engineer the most quiet and vibration-free air compressor system on the
market. Don’t be surprised if your air compressor gets slightly more quiet after break-in and also be aware that it is common for
the compressor to have a slightly different tone while it traverses the pressure range.
INLET FILTER - AccuAir suggests routing the supplied inlet air line and filter just outside the vehicle to reduce noise in the drivers
compartment. Keep in mind that the filter will often emit moisture during the purge cycle, so mounting it outside the vehicle and
pointed toward the ground is suggested.
!WARNING: Improper grounding of the ENDO-CVT™ ground cable can cause poor system
performance and even potential damage to your ENDO-CVT™. If you are unsure how to
achieve a proper ground, please contact AccuAir tech support at 877-247-3696.
!
!
WARNING: Your ENDO-CVT™ may become HOT to the touch after repeated operations.
WARNING: Operating your ENDO-CVT™ without the supplied air filter may damage your
compressor and void your warranty.
!WARNING: For proper noise and vibration isolation, the ENDO-CVT™ must be mounted as
shown on page 9 &10 only. Side mounting is not recommended and will generate more noise.
NOTE: You may notice that the reservoir will drop pressure after it has gotten extremely hot
and then cooled. This IS NOT an air leak, instead this is due to the Joseph Gay-Lussac Gas
Law (P1/T1=P2/T2) ie compressed air loses pressure as it cools.
NOTE: Extending the length of your inlet air line is not suggested as it can affect the efficiency
of the desiccant purge.
!
!

Mount Tank1
2
3
4
5
6
7
8
9
10
8,9,10
4
5
5
6
5
15
11,12
6
Change Tank Pressure Setting on e-Level system
Hookup air spring plumbing and plug unused ports on tank
Connect Control harness to CVT and install CVT Adapter Module
Connect Ignition Wire from Control harness to vehicle ignition source
Connect Adapter Module valve harness connector to e-Level ECU
Connect Adapter Module trigger wire (yellow) and pressure signal wire (green) to e-Level ECU
Hookup Power harness
Calibrate the e-Level system
Adjust Flow Controls if desired to make vehicle move up and down level front to rear
Description Page #Step #
ENDO-CVT™ INSTALLATION CHECKLIST
Read the entirety of this manual to familiarize yourself with what is involved for a successful installation. When you are ready to
install your ENDO-CVT tank you can reference the checklist below for a step-by-step guide through the manual.
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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018
AIR PRESSURE LIMITS / SYSTEM FEATURES
ENDO-CVT are DOT rated for 200 psi maximum pressure (13.6 bar). Failure to observe maximum rated pressure could result in
tank rupture and consequent property damage or personal injury or death.
ENDO-CVT includes a Pressure Relief Valve (see Figure 1) set for 400 psi (27.2 bar). This opening pressure exceeds any normal
operating pressure and is in place to protect against extreme conditions.
Pressure
Relief Valve
Figure 1: Standard Pressure Relief Valve and Control Harness Plug.
Tandem CVT’s: Connect multiple
CVT’s together with the Blue Wire
through Terminal #4 on each tank.
Figure 2: Compressor Air Intake, Power Harness Plug & PTC Fittings
Shared
Exhaust PTC
Spring A
UP Adjuster
Spring A
DOWN Adjuster
Spring A
PTC
Spring B
UP Adjuster
Spring B
DOWN Adjuster
Spring B
PTC
Compressor
Air Intake
Control Harness
Power Harness
FRONT
VEHICLE
FRONT
VEHICLE
GRAVITY
GRAVITY
GRAVITY
GRAVITY
GRAVITY
GRAVITY
GRAVITY
Control Plug Description
COMM +12V
COMM Ground
Ignition +12V
Tandem CVT Wire
COMM TX
COMM RX
1.) Red
2.) Black
3.) Orange
4.) Blue
5.) White
6.) Green
1
2
3
6
5
4
Power Plug Description
+12V Battery
+12V Battery
+12V Battery
Ground
Ground
Ground
1.) Red
2.) Red
3.) Red
4.) Black
5.) Black
6.) Black
1
2
3
6
5
4

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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018
NOTE: If using the AccuAir supplied NPT plugs, these should assemble flush with the tank
surface. Other plugs will install differently. Do not over tighten as this can cause damage to
the tank or NPT fitting.
!
!
NOTE: At this point, patience should be exercised as the liquid thread sealant needs time to
cure. Applying air pressure to the tank may disturb the curing process resulting in leaks.
Read the directions on the thread sealant package and wait the recommended cure time.
ENDO-CVT PTC FITTINGS
SPECIFICATIONS
Air line installation – Cut the end of the air line as square as possible with a sharp blade or air line cutting tool. Make
sure the cut end is free from burrs. Insert the end of the air line into the PTC fitting until it “bottoms out.” Pull firmly to
test the connection. If the air line pulls out, re-insert and then pull the PTC collet outward from the face of the
ENDO-CVT cap. Pull firmly on the air line to test the connection.
Air line removal – Press the PTC collet back toward the face of the ENDO-CVT cap and hold it there while pulling firmly
on the air line.
Basic operation
Pro-Tip: Use a 3/8" open-end wrench to hold the collet back while you pull to remove the air line.
Plastic - 3/8” O.D. US DOT approved plastic air brake tubing
Aluminum - 3/8" O.D., 1/4" I.D. tubing
Acceptable size and types of air line:
Physical Specifications
Product
ENDO-CVT23
ENDO-CVT25
ENDO-CVT43
ENDO-CVT45
Diameter
6.62in (168mm)
6.62in (168mm)
6.62in (168mm)
6.62in (168mm)
Length
18.3in (465mm)
29.3in (745mm)
18.4in (468mm)
29.5in (750mm)
Air Spring Ports
2
2
4
4
Torque Specifications
Fastener
Quick Release (QR) Pins
Quick Release Base Mounting Bolts
Quick Release Set Screw
ENDO Cap Bolts
Torque
40 in-lbs (3.3 ft-lbs, 4.5 N-m)
120 in-lbs (10.0 ft-lbs, 13.5 N-m)
40 in-lbs (3.3 ft-lbs, 4.5 N-m)
200 in-lbs (16.7 ft-lbs, 22.6 N-m)
Electrical Specifications
Component
CVT
Voltage
Requirement
9-16V
0-20V (Withstand)
Amperage
Requirement
35.0 AMPS (Typical)
50.0 AMPS (Max)
QUIESCENT
CURRENT
0.075 A (first 24 hours)
0.008 A (after 24 hours)
Ingress
Protection
IP67
Table 1: ENDO-CVT physical specifications Table 2: ENDO-CVT Fastener torque specifications
Table 3: Electrical specifications for the ENDO-CVT product line
INSTALLING NPT PLUGS
Identify the NPT plugs necessary for your application from the selection provided with your ENDO-CVT product.
Apply the thread sealant (Loctite 565 or equivalent) provided with your ENDO product to the NPT fitting prior to installation.
Thread the plug into the hole until it is “finger tight” then tighten between 0.5 and 1.5 full turns.
Wait until the 565 is cured before pressurizing your system.
Pro-Tip: Remove excess Loctite 565 with a Q-tip dipped in brake-clean or other solvent.
!WARNING: Stainless steel tubing will not be retained by the PTC fitting and will disconnect
under pressure. Do not use stainless tubing with the ENDO-CVT.

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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018
SENS_2 SENS_4
SENS_1
SENS_3
HEADLIGHTS
EC_GND
ECU
OFF ON
IGN
(Main)
50Amp Fuse
Intake
Filter
IGNITION +12V
TANDEM CVT WIRE
STANDARD CVT
VEHICLE ORIENTATION
TOP VIEW
50
A
B
B
A
FRONT
VEHICLE
GRAVITY
GRAVITY
BATT_12V
(F1) 10 Amp
ECU Fuse
IGN_12V
Figure 3: CVT wiring and plumbing diagram

Page 6
ENDO-CVT Instructions V 1.2AccuAir Suspension 2018
Comp Trigger IN <12V Digital IN>
Tank Pressure OUT <0.5-4.5V DAC>
Replace with Comp Trigger IN
Adapter Harness Yellow Wire
Plug Terminals #6 and #13
Replace with Tank Pressure OUT
Adapter Harness Green Wire
(8) UP/DN
1/2/3/4
<12V Digital IN>
12 in
M8 to CVT Connector
STATUS INDICATOR
LIGHT
Re-Pin Into e-Level Main Harness Connector
RE-PINNING E-LEVEL
MAIN HARNESS CONNECTOR
CVT ADAPTER HARNESS
T_ W
1_Black to Eye-Let EC_GND
2_
3_
4_
5_
6_Red (P-SENS) PLUG
7_Green (Tank Pressure)
8_Purple HEADLIGHTS
9_
10_
11_
12_Yellow to COMP Trigger IN
13_Black (P-SENS) PLUG
14_Orange IGN_12V
15_
16_Red to 10 Amp Fuse
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
REMOVING & REPLACING AN MX150 WIRE
T= Terminal W= Wire
1.) Up 4 White/Black
2.) Up 3 White/Orange
3.) Up 2 White/Purple
4.) Up 1 White
5.) Down 4 White/Gray
6.) Down 3 White/Green
7.) Down 2 White/Brown
8.) Down 1 White/Blue
8-Pin ADAPTER HARNESS
NOTE: This harness can be re-oriented for non standard CVT vehicle orientations.
STEP #1 STEP #2 STEP #3
STEP #4 STEP #5
STEP #9
STEP #6
STEP #7 STEP #8
STEP #10 STEP #11
BACK OF CONNECTOR
BACK OF CONNECTOR
Figure 4: CVT Adapter harness
Figure 5: Re-pinning e-Level™ main harness connector Figure 6: Removing & replacing an MX150 wire

Ready N/ANone
Battery Over
Maximum Voltage
None
None
None
None
None
None
None
None
System Off
Standby Turn Ignition OnCompressor OFF
Compressor Running When compressor turns OFFNone
Tank Pressure sensor
disconnected When a normal tank pressure reading IS detected
Compressor OFF
Compressor Head Temp
105ºC Temperature goes below 95ºC
STOP Compressor
Battery Over Voltage Bring Battery voltage BELOW 15 V
Bring Battery voltage BELOW 15 V
None
Battery Under Voltage Bring Battery voltage ABOVE 11 VSTOP Compressor
Valve Under current Valve current returns to normal
in subsequent valve operation
Valve Over current Valve current returns to normal
in subsequent valve operation
Head temp
communication error Head temperature sensor begins to respond to commands
RHT communication
error RHT Sensor begins responding to commands
No response to ping A command or ping receives
appropriate response
Data String too long
for specified length Message re-sent with correct string Length
Data String too short
for specified length Message re-sent with correct string Length
Incomplete data Message re-sent with correct
string Length
Compressor Line
Voltage error
Difference in battery and motor
voltage comes back below threshold
when compressor is restarted.
None
Compressor
Over current / Stall Error Compressor successfully started
Hard Start
Procedure
Compressor Head Temp
95ºC Temperature goes below 85ºC
STOP Compressor
unless forced with
IGN cycle
System Status Indicator Action Reset Procedure LED Blink Sequence
2 seconds
4 seconds*
ENDO-CVT System Diagnostics
Table 4: ENDO-CVT™ System Diagnostics chart
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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018AccuAir Suspension 2018

USING THE QR MOUNT
Install the QR Mounts to your vehicle using the hardware and specifications included on your mounting template.
Align the QR mounting pins with the holes in QR mounts and insert them until the tank body is in full contact with the QR
mounts.
Rotate the tank body on its long axis such that the QR mounting pins move away from the set screw. Continue rotation until
the pins snap into place.
Install the set screw and tighten until it is flush with the front surface of the mounting base and torque to 40 in-lbs (3.3 ft-lbs,
4.5 N-m).
1.
2.
3.
4.
STEP 1 STEP 2
STEP 3 STEP 4
Figure 7: Four step QR operation procedure
Pro-Tip: If the QR mounts seem tight, and won’t “click” into final
position, the set screws may be used to push the mounting pins
into position.
GRAVITY
GRAVITY
GRAVITY
NOTE: The threaded insert for the mounting base
set screw has been designed with an anti-vibration
feature similar to a nylon insert lock nut. There will
be resistance to rotation prior to contact between
the set screw and the QR mounting pins.
!
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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

VEHICLE STANDARD MOUNTING
Your ENDO Tank system has been designed to use AccuAir’s unique Quick Release (QR) mounting system. The QR mounts
are installed on the tank at the factory and will need to be removed prior to installation.
The mounting template, included in the shipping carton of your ENDO system, has complete details on mounting your tank to
your vehicle. Accurate location of the QR mounts is critical for a successful installation. Read all steps before starting your
installation.
The QR mounting system has been designed to attach the ENDO Tank securely to a flat surface. Minor variations can be
handled with shims of appropriate thickness. If your intended mounting location is significantly uneven, AccuAir strongly
recommends mounting the QR bases to a suitable plate that is then installed on the vehicle.
AccuAir recommends mounting the QR mounting bases with the included 5/16”-18 screws or 1/4”-20 self-tapping screws at
120 in-lbs (10 ft-lbs, 13.6 N-m) torque. Use care when tightening these fasteners as over-torquing can cause the QR bases
to distort.
Pro-Tip: On first installation of the tank, tighten the bolts between the QR mounting bases and the vehicle until they are just snug.
Install the tank into its final position and let the mounts adapt, then remove the tank again to torque the bolts.
STANDARD MOUNTING:
!
NOTE: The QR mounting “pins” have been pre-installed in the tank body with a thread locker.
If removed, then upon re-installation apply a thread locker (Loctite 262 or equivalent) to the
threads and torque to 40 in-lbs (3.3 ft-lbs, 4.5 N-m). Significantly over-torquing these
fasteners may cause damage to the tank or the fasteners.
GRAVITY
GRAVITY
GRAVITY
Figure 8: Standard mounting
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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

VEHICLE SIDE MOUNTING
SIDE MOUNTING:
For Side Mounting, the QR pins can be moved to what is usually the back of the tank.
!
NOTE: The QR mounting “pins” have been pre-installed in the tank body with a thread locker.
If removed, then upon re-installation apply a thread locker (Loctite 262 or equivalent) to the
threads and torque to 40 in-lbs (3.3 ft-lbs, 4.5 N-m). Significantly over-torquing these
fasteners may cause damage to the tank or the fasteners.
MOVE PINS
GRAVITY
GRAVITY
GRAVITY
Figure 9: Side mounting
Page 10
ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

ENDO-CVT FLOW ADJUSTMENT
The AccuAir ENDO-CVT end caps have flow adjustment screws to control the rate of airflow between the air springs and the
solenoid valves. These allow speed adjustment of each corner of the car independently, both up and down, so you can adjust the
front and rear to lift and lower at the same speed.
Each air spring port on an ENDO-CVT tank cap has adjuster screws for inlet and exhaust above and below (respectively) the
push-to-connect fitting (see Figure 2). Each screw has 10 turns of adjustment from fully open (top) to fully closed (bottom).
Adjustment is nearly linear for most of the range. For example, starting 2 turns from the bottom and backing out the adjuster 2 turns
(4 turns total) will almost double the flow.
The ENDO-CVT has been shipped from the factory with all of the flow control screws set to maximum speed (top). You can choose
to slow down the speed of a desired air spring in a desired direction by turning the screw clockwise toward the bottom. Match the
number of turns for the paired air spring and direction (i.e., 2 turns in for the left rear “UP” should be matched at 2 turns in for the
right rear “UP”).
ENDO-CVT FLOW ADJUSTMENT
Figure 10: ENDO-CVT flow adjustment behavior
Turns from bottom
Flow Rate (% of Maximum)
0
100.00%
90.00%
80.00%
70.00%
60.00%
50.00%
40.00%
30.00%
20.00%
10.00%
0.00%
2 4 6 8 10 12
!NOTE: The e-Level system will need to be RE-CALIBRATED after
flow adjustment is completed.
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ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

Starting with the vehicle at highest height, find the fast LOWERING end of your vehicle by pressing all four DOWN buttons at
the same time to LOWER the vehicle. The fast end will reach the bottom of the travel first.
Slow the DOWN flow controls for the fast end of the vehicle by turning the flow control screws clockwise for the right and left
equally (start with one turn and go to half turns as you get closer to matching the speed).
Repeat steps 5-6 until the front and rear of your vehicle lift at the exact same speed.
If you are using an AccuAir e-Level system, make sure to recalibrate the e-Level system after you have finished
adjusting your flow control screws.
5.
6.
7.
8.
!WARNING: Do not remove the adjuster screws with the system under pressure. Removing
an adjuster screw will release the air from the associated air spring. The screws are
retained by a small circlip in order to prevent accidental removal.
NOTE: Fully tightening an adjuster screw will disable that functionality for that air spring.
For example, fully tightening the UP adjuster on “Spring A” will prevent any additional air
from getting to that spring no matter the state of the solenoid valve.
!
Start with all of the flow control screws set to maximum speed (top).
Starting with the vehicle at lowest height, find the fast LIFTING end of your vehicle by pressing all four UP buttons at the same
time to LIFT the vehicle. The fast end will reach the top of the travel first.
Slow the UP flow controls for the fast end of the vehicle by turning the flow control screws clockwise for the right and left
equally (start with one turn and go to half turns as you get closer to matching the speed).
Repeat steps 2-3 until the front and rear of your vehicle lift at the exact same speed.
1.
2.
3.
4.
Pro-Tip: The light end of the vehicle (usually the rear) will naturally lift faster and lower slower than the heavy end (usually the front).
Use this multi-step process to make the front and rear of your vehicle adjust level at all times.
Page 12
ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

ENDO-CVT PTC SERVICE INSTRUCTIONS
A leaky fitting as the result of a damaged O-ring. The O-ring can get damaged by a burr on either soft or hard line. In this
case you may choose NOT to remove the Filter Screen and Tube Stem if it is not clogged.
A clogged filter screen as the result of too much debris present in your air springs or plumbing. In this case, you may choose
to re-use the original O-ring if it is not leaking.
Your ENDO-CVT tank has been fully assembled and tested by AccuAir. In many circumstances, it will never be necessary to service
your Push To Connect fitting components. Some potential reasons for servicing your PTC fittings may include:
Remove the air line from the PTC fitting (Push the Collet in with a 3/8” open end wrench and pull the air line out).
Remove the PTC Collet from the PTC Cavity by inserting a towel covered flat head screw driver between the cap and the Collet
and gently prying from side to side.
Use a flat head screwdriver to loosen the gold Tube Stem (CCW to remove).
Pull on the tube stem to bring the o-ring to the top of the PTC Cavity and hook it with a pick to remove it from the PTC Cavity.
Remove the gold Tube Stem from the PTC Cavity.
Use a pick tool to hook and remove the plastic Screen Washer from the PTC Cavity.
Use a pick tool to hook and remove the PTC Filter Screen.
1.
2.
3.
4.
5.
6.
7.
REMOVAL STEPS:
Remove the contents of your ENDO PTC Service Kit (Part No. AA-ENDO-PTC-SVC).
Gently install the new Filter Screen with a soft faced tool with the DOME oriented as shown above.
Install the plastic Screen Washer on top of the Filter Screen.
Use a flat head screwdriver to install the gold Tube Stem hand tight (CW to install).
(DO NOT CROSS THREAD OR OVER TORQUE THE TUBE STEM).
Install the O-ring into the PTC Cavity and make sure that it lays flat.
Push the Collet back into the PTC Cavity.
1.
2.
3.
4.
5.
6.
ASSEMBLY STEPS:
O-ring
Collet
Air Line
Tube Stem
PTC Cavity
Plastic Screen Washer
Filter Screen
End Cap Material
Figure 11: PTC diagram
Page 13
ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

REMOVING THE END CAPS
If you choose to custom finish your ENDO tank, you may wish to disassemble it beforehand.
Removal for cleaning the inlet filters or the inside of the ENDO tank.
Your ENDO tank has been fully assembled and tested by AccuAir. In many circumstances, it will never be necessary to remove the
end caps for the life of the product. Some potential reasons for removing the end caps may include:
Remove your ENDO tank from the vehicle and place it on a work bench.
Loosen the end cap bolts on only one end cap by only 3 full turns each.
Lightly pressurize your ENDO tank using shop air until the cap seal disengages from the center body of the ENDO tank.
Let the air pressure escape fully.
Remove the end cap bolts entirely.
Remove the first cap.
Remove the bolts entirely from the second end cap.
Use a long stick to gently tap the end cap from the center body, (use caution not to damage any of the wires or components
on the inside of a CVT end cap).
1.
2.
3.
4.
5.
6.
7.
8.
REMOVAL STEPS:
Remove the contents of your ENDO Tank Rebuild Kit (Part No. AA-ENDO-TANK-SVC).
Add an O-ring lubricant like Vaseline to the main O-ring that seals the end cap to the center body. Install the O-ring onto the
end cap.
Use two new bolts on each end cap to properly align the end cap to the center body.
Lightly tap the end cap from side to side until it is fully seated in the center body.
Make sure that all of your new bolts included in the ENDO Tank Rebuild Kit have the yellow O-rings installed under each
head.
Install all of the bolts hand tight.
Successively torque all of the end cap bolts in a star pattern up to 200 in-lbs (16.7 ft-lbs, 22.6 N-m).
1.
2.
3.
4.
5.
6.
7.
ASSEMBLY STEPS:
!WARNING: Failure to properly torque your end cap bolts may result in tank failure
and/or personal injury.
WARNING: Do not insert screwdrivers or any other prying tool into the gap between the
tank body and end cap. Damage to both parts will result and it will fail to separate the cap
from the body.
!
!
WARNING: Fasteners and O-rings are not reusable. Purchase an ENDO Tank Rebuild
Kit (Part No. AA-ENDO-TANK-SVC) prior to disassembly. Full instructions for cap removal
and drawings for optional cap removal tools are included with the Tank Rebuild Kit. The
processes described there will minimize the chance for damage to structural elements and
surface finishes.
Page 14
ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

200
175150
Figure 12: 200 psi
Tank Pressure Mode
E-LEVEL TANK PRESSURE MODE
Your e-Level system was shipped with the Tank Pressure Mode set at 150 PSI. ENDO-CVT requires you to change the e-Level Tank
Pressure Mode to 200 PSI using the following procedure.
To Change The Tank Pressure Mode:
With the Ignition ON, press the Program “ ” Button.
Next press the #3 DOWN “ ” Button to set Tank Pressure Mode to 150 PSI, the #4 DOWN
“ ” Button once to set the Tank Pressure Mode to 175 PSI and the #4 DOWN “ ” Button
again to set the Tank Pressure Mode to 200 PSI.
When the #3 DOWN “ ” Arrow is White:
Tank Pressure Mode is at 150 PSI.
When the #3 DOWN “ ” Arrow and the #4 DOWN “ ” Arrow are alternating ON & OFF:
Tank Pressure Mode is at 175 PSI.
When the #4 DOWN “ ” Arrow is Red:
Tank Pressure Mode is at 200 PSI.
!
!
NOTE: The new Tank Pressure setting will NOT take affect until the
system is RE-CALLIBRATED.
NOTE: Program Mode will exit after 5 seconds or can be exited by
pressing the Program Button again and your changes will be saved.
Page 15
ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

ENDO-CVT™ FEATURE OVERVIEW
AccuAir’s patent pending ENDO-CVT™ takes streamlined appearance and ease of installation to an entirely new level by
integrating the industry's first air compressor within the air tank as well as integrating the air spring solenoid valves directly into the
air tank end caps themselves. Yet, the ENDO-CVT™ is far more than just components moved inside the air tank (which only
consume 0.5 gallons of volume)... AccuAir partnered with WABCO to bring the quietest, most efficient, and moisture free air
compressor that the market has ever seen. This single compressor does the work of two industry standard units at 200 psi. The
ENDO-CVT™ also represents AccuAir’s next generation of solenoid valve technology that includes VFC™ (variable flow control) in
addition to D.O.T. approved fully filtered and rebuild-able FFPTC™ (fully-filtered push-to-connect) fittings.
Internal Wabco™ Compressor
The internal WABCO™ compressor refills the tank with
completely dry air at a rate twice as fast as the current
market standard compressor.
Digital Intelligence
Internal ECU monitors tank pressure, compressor head
temperature, and ambient moisture levels to optimize
compressor operation, provide maximum duty cycle, as
well as regenerate the built-in desiccant air dryer as required.
Dual Stage Isolation
The patent pending primary and secondary isolation system
that softly suspends the compressor inside the tank, eliminating
compressor vibrations from being transmitted into the vehicle's
body or chassis.
Valve-Integrated Tank Caps
Includes the solenoid valves and air tank all in one
easy to mount package.
4-Corner & 2-Corner
Available in 4-corner and 2-corner configurations.
Adjustable Flow Control
Built-in VFCTM (variable flow control) adjusters allow
for end user adjustment of the speed of each corner
and each direction individually.
Filtered Ports
FFPTCTM (fully-filtered-push-to-connect) air fittings
eliminate the risk of debris-induced valve problems
common with all other solenoid valves on the market.
DOT PTC Fittings
Built-in D.O.T. approved and
rebuild-able Push-To-Connect fittings.
Page 16
ENDO-CVT Instructions V 1.2AccuAir Suspension 2018

WWW.ACCUAIR.COM
831 BUCKLEY RD. SAN LUIS OBISPO, CA 93401
877.247. 3696