Reyco Granning AirMaster User manual

Powered Vehicle Suspensions
Document #: D714425
Revision: A
Revision Date: 09/2018
Installation Manual
AirMaster - Electronic Air Control Kit
Reyco Granning Suspensions
1205 Industrial Park Drive
Mount Vernon, MO 65712
Phone: [phone]
Fax: [phone]
www.reycogranning.com

Page Intentionally Left Blank

Page 2of 36
D714425 REV A 9/18
TABLE OF CONTENTS
Int roduction ………………………………………………………………………………………………………………………………….. 3
Product Overview ………………………………………………………………………………………………………………………….. 5
Safety Instructions …………………………………………………………………………………………………………………………6
Preparation ……………………………………………………………………………………………………………………………………7
Tools, parts, consumables and documents required ……………………………………………………………………. 7
Quick checklist ………………………………………………………………………………………………………………………………7
Installation ……………………………………………………………………………………………………………………………………8
Kit List …………………………………………………………………………………………………………………………………………... 8
Step 1 – Support the vehicle ……………………………………………………………………………………………………….. 10
Step 3 – Connect air compressor DC common and plug in main harness ……………………………………11
Step 4a – Mount the driver and passenger ride height sensors ………………………………………………….. 12
Step 4b – Harness connections to the ride height sensors ………………………………………………………….. 14
Step 5a – Feed the harness into the cab ………………………………………………………………………………………15
Step 5b – Mount the rocker switch ……………………………………………………………...................................... 15
Step 5c – Extend rocker switch wires (if required) ………………………………………………………………………. 16
Step 5d – Connect ignition and D C common control wires …………………………………………………………. 17
Step 5e – Connect to the vehicle CAN bus network …………………………………………………………………….. 18
Step 6 – Connect door switch input …………………………………………………………………………………………….. 19
Step 7 – Connect motion warning output ……………………………………………………………………………………. 20
Step 8 – Connect low pressure output …………………………………………………………………………………………21
Step 9a – Air -line push -in ttings …………………………………………………………………………………………………22
Assembly instructions ……………………………………………………………………………………………………22
Removal instructions ……………………………………………………………………………………………………. 22
Step 9b – Connect air -line between the air dryer & main air tank with a check valve ……............... 23
Step 9c – Connect air -lines for the driver & passenger air springs …………………………........ ............... 24
Step 9d – Connect air supply & exhaust air -lines ……………………………………………………………………….. . 25
Step 10a – Connect persistent 1 2VDC supply to 50 Amp auto reset breaker and main harnes s …26
Step 10b – Connect persistent 12VDC supply to 10 Amp in -line breaker ……………………………………. 26
System Setup ……………………………………………………………………………………………………………………………… 27
Introduction ………………………………………………………………………………………………………………………………. 27
Step 1 – Move the vehicle to a drive -on service pit or hoist …………………………………........................ . 27
Step 2a – Select Ride Height Sensor Setup Mode ………………………………………………………………………. 28
Step 2b – Adjust height sensor levers ……………………………………………………………………………………….. 29
Step 2c – Optionally exit Setup Mode ……………………………………………………………………………………….. 30
Step 2d – Perform Travel Zero -Set ……………………………………………………………………………………………. 30
Step 2e – Optionally exit Setup Mode ………………………………………………………………………………………. 30
Step 2f – Enter Kneel Height Setup Mode …………………………………………………………………………………30
Step 3 – Finishing the installation …………………………………………………………………………………………….. 31
Support Contact Information ……………………………………………………………………………………………………. 32
Installation Validation Checklist ………………………………………………………………………………………………. 33
REV ECR # DATE CHANGE DESCRIPTION BY CHK APV
OR 21039 6/8/17 RELEASED FOR PRODUCTION JCR - -
A 21341 6/15/18 Improvements to information LLG MGO JAH

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D714425 REV A 9/18
INTRODUCTION
Company Prole
Reyco Granning Suspensions was formed by the merger and acquisition of two
well -known names in the heavy duty vehicle suspension industry —Reyco and
Granning.
Reyco grew out of the Reynolds Mfg. Co and wasrst known as a major supplier
of brake drums for heavy duty vehicles and later developed a full line of air and
steel -spring suspensions for trucks, buses, tr ailers and motorhomes.
Granning Air Suspensions was founded in 1949 in Detroit, Michigan as a
manufacturer of auxiliary lift axle suspensions. Granning later became an
innovator of independent front air suspensions for the motorhome industry.
Reyco Granning LLC was formed in early 2011 through a p artnering of senior
managers and MAT Capital, a private investment group headquartered in Long
Grove, Illinois.
Congratulations on your purchase of a ReycoGranning ®product . Founded in
1948 by one of the pioneers of air suspensions, ReycoGranning ®Air
Suspensions supplies drive and tag axle air suspension systems to a variety of
original equipment manufacturers as well as to the aftermarket industry. The R -
Series products , are utilized by OEM customers in applications such as
recreational vehicles, shuttl e bus, trailer, chassis builders, Type I and III
ambulances and class 3 through 8 truck applications. This product line now
exceeds 25 models that cover all major chassis utilized in the above
applications.

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D714425 REV A 9/18
INTRODUCTION
About This Manual
This publication is intended to instruct in the installation of your Reyco
Granning ®product . It is important to read and understand the entire Technical
Procedure publication prior to performing any operation of or service to this
product.
Reyco Granning ® Air Suspensio ns reserves the right to modify the products
and/or procedures and to change specications at any time without notice and
without incurring obligation. Contact customer service at 800 -753 -0050 for
information on the latest version of this manual.
You mus t follow your company safety procedures when you service the product .
Be sure you read and understand all the procedures and instructions before you
begin work on the product.
Some procedures require the use of special tools for safe and correct service.
Failure to use these special tools when required can cause personal injury or
damage to suspension /air control components.
The latest revision of this manual is available online at
http://www. ReycoGranning .co m/
Reyco Granning ® Air Suspensions has developed this manual to aid in the
installation of Reyco Granning ® ’s AirMaster Electronic Height Control System.

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D714425 REV A 9/18
PRODUCT OVERVIEW
This manual covers the installation and conguration of the AirMaster Electronic Height
Control system to control the rear suspension air bags for Ride or Kneel heights.
RIDE HEIGHT : This is the normal height of the rear of the vehicle when driving.
KNEEL HEIGHT : At speeds below 10 mph the rear of the vehicle ca n be lowered to
provide increased accessibility.
Note: By default, the kneeling feature is disabled. To enable kneeling
during setup, refer to page System Setup, step 2f .
Two (2) electronic ride height sensors are connected to a control module which operat es
air valves to allow the driver and passenger suspension air bags to be inated or deated
as required.
Note: The front suspension is not part of this control system.
A discrete wired input for ignition is used to enable the height control system.
A manually operated momentary switch is added adjacent to the driver which provides an
input to the control module to initiate kneeling. This switch also provides a means to
perform ‘Ride Height Setup, ‘Travel Zero Set’ and ‘Kneel Height Setup’ - refer to Sy stem
Setup steps 2a – 2f .
A Door switch discrete wired input is provided. With the ignition on, this is used to kneel
when a door is opened, and return to ride height when the door is closed.
A Motion Warning discrete wired output is activated when the rea r of the vehicle is
lowering or raising between ride height and kneel height.
A Low Pressure discrete wired output is activated when the rear of the vehicle is either
below the lower warning limit for an extended period of time or the compressor has been
running for an extended period of time.
The control module is connected to an air pressure transducer and activates the air
compressor to maintain pressure for normal driving and to provide optimum pressure to
minimize transition time when recovering from k neel height to ride height. When
energized, a Dryer output purges the air dryer and provides compressor pressure head
relief.
Depending on the design of rocker switch, it may incorporate a status indicator. Otherwise,
a separate status indicator is added i n the dash area. This is also used to provide fault
‘blink’ codes; refer to the AirMaster Owner’s Manual (D714424).
A connection to the vehicle CAN bus network provides transmission gear and speed data.
In reverse gear, automatic ride height adjustments ar e temporarily disabled. Kneeling is
only available at speeds of less than 0.02n 10 MPH.

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D714425 REV A 9/18
SAFETY INSTRUCTIONS
WARNING
DO NOT USE THE VEHICLES SUSPENSION TO SUPPORT THE VEHICLE FOR
SERVICING OR INSPECTION. INSTEAD, INSTALL ADEQUATE BLOCKING
BEFORE WORKING UN DER ANY VEHICLE. THE SYSTEM IS DESIGNED AS A
'HEIGHT CONTROL ' SYSTEM ONLY.
KEEP CLEAR OF PINCH POINTS WHEN ADJUSTING THE RIDE HEIGHT SENSORS
AS THE SUSPENSION AIR BAGS WILL ADJUST IN RESPONSE TO A LEVER
ADJUSTMENT.
KEEP PEOPLE CLEAR OF VEHICLE WHILE RAISIN G OR LOWERING .
CAUTION
READ AND UNDERSTAND THE ENTIRE OPERATOR ’S MANUAL BEFORE USING OR
SERVICING YOUR ELECTRONIC RIDE CONTROL SYSTEM.
THIS SYSTEM SHOULD BE SERVICED ONLY BY QUALIFIED PERSONNEL.
LEAKS IN A VEHICLE'S AIR SYSTEM CAN CAUSE THE VEHICLE TO LO WER OVER
TIME WHEN THE SYSTEM IS OFF.
CONNECT THE SUSPENSION CONTROL SYSTEM TO THE VEHICLE BATTERY ONLY
AFTER ALL OTHER ELECTRICAL AND PNUEMATIC COMPONENTS HAVE FIRST
BEEN INSTALLED.

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D714425 REV A 9/18
PREPARATION
Tools , parts , consumables and documents required
Mounting fasteners for the suspension control enclosure and ride height sensors .
¼” & 3/8” Air tubing to connect the suspension control enclosure .
Ignition switched 12VDC for the Rocker switch , Ignition and Permit .
Connection fasteners , linkage rods and brackets for the two (2) Ride -Height Sensor s.
Service Pit or Hoist to setup the ride -height sensors.
Hand tools for adjusting the ride -height sensors
Measuring tape .
Air Suspension Installation Instructions and Draw ing
AirMaster Installation Drawing 714393
AirMaster Owner’s Manual D714424 (for reference, if needed) .
Optional wire and contacts for installing the ‘motion warning’ or ‘low pressure’
outputs to a relay, or an indicator and/ or audible annunciator.
Quick ch ecklist
Support the vehicle .
Mount the suspension control enclosure.
Connect Air Compressor DC Common and plug in the main harness .
Mount the driver and passenger electronic ride height s ensors .
Harness connections to the ride height sensors
Feed the harness into the cab
Mount the Rocker switch.
Extend rocker switch wires (if required).
Connect Ignition and DC Common control wires .
Connect to the Vehicle CAN bus Network .
Conn ect Door Switch Wire.
Connect Motion Warning Output .
Connect Low Pressure Output .
Connect air -line between the air dryer and the main air tank with a check valve.
Connect air -lines for the Driver & Passenger air springs .
Connect air supply & exha ust air -lines .
Connect persistent 12VDC supply to 50 Amp automatic reset breaker and main
harness .
Connect persistent 12VDC supply to 10 Amp manual reset breaker.
Move the vehicle a drive -on service pit or hoist.
Perform Ride -Height Setup , Travel Z ero -Set and set Kneel Height .
Test System Operation.

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D714425 REV A 9/18
INSTALLATION
Kit list – K714393 Includes:
Refer to Drawing 714393 for installation of the following components:
Air Tank Assembly (713882 -01)
Elbow (x2) for Air Springs – 90, 1/4T x 1/4MPT (702 600 -01)
Hex Head Bolt (x4) – 3/8 -16 x 1” (100263 -P1), Washer (x8) – 3/8 (263), Nut (x4) – 3/8 -
16 (20029 -01) for mounting Enclosure Assembly
Hex Head Bolt (x4) – ¼-20 x ¾”, Washer (x4) – ¼, Nut (x4) – ¼-20 (4458)(x2) for
mounting Electronic Height Control Sensors

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D714425 REV A 9/18
INSTALLATION
Refer t o drawing 714393 for installation of the following components
ITEM DESCRIPTION
A Suspension Control Enclosure
B Left and Right Ride Height Sens ors. (Identical part numbers)
C Suspension Control Main Harness ( 12V DC Power, Ride Height Sensors, Rocker
switch and vehicle interface with discrete output s, discrete inputs and CAN bus )
D Rocker Switch mounting bracket
E Momentary Rocker Switch with integrated status indicator
F Type 3, 10 Amp manual reset breaker (control circuit 12V DC power)
G Type 1, 50 Amp automatic reset breaker (compressor 12V DC power)
H Insulator Boot for 50 Amp automatic reset breaker
I Mounting screws for 50 Amp automat ic resent breaker
J Mounting bracket for 50 Amp automatic reset breaker
K Battery jumper for compressor 50 Amp automatic reset breaker
L CAN bus to OBD -2 connector harness
F
A
B
L
K
G
F
C
J
H
E
D
I

Page 10 of 36
D714425 REV A 9/18
INSTALLATION
Step 1 – Support the vehicle
Before you start this installation , read the Safety Instructions section to
understand the risks.
The vehicle should be supported on soli d ground using blocks or other j acking
methods.
Do not use the vehicle ’s suspension.
Elevate the vehicle to its nor mal ride height.
Step 2 – Mount the suspension control enclosure
Before mounting the suspension control enclosure, rst conrm the supplied
harness has sucient length (extensions available) to reach the following
locations :
Vehicle CAN bus connection point.
Both ride h eight sensors.
Dash mounted kneel rocker switch .
Mount the enclosure on either a left or right frame rail . Allow sucient
clearance to access either end to connect the main harne ss and air lines , as
well as service access to remove the cover.
Note: Later on in this installation procedure the vehicle support must be
removed to set up the ride -height sensors. It is always unsafe to go
under a vehicle with minimal ground clearance. Th erefore, a hoist
or service pit will be required.
Note: The enclosure is intended to be mounted horizontally. There is no
need to manually ne -tune the placement because the software
will determine where ‘Travel level’ is during initial calibration.
Important: The enclosure should not be subjected to direct water spray
from the wheels. Install a spray barrier as required .

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D714425 REV A 9/18
INSTALLATION
Step 3 – Connect a ir compressor DC common and plug in the main
harness
Conn ect the Air Compressor DC common wire to the chassis frame.
Remove the protective cap and plug in the main harness.
IMPORTANT : This DC common wire must have a good conductive
connection and be well secured.
Once secured, apply a corrosion inhib itor to the
connection point. For example: Paint or Liquid Tape.
DC Common
Remove cap and plug
in the main harness
Optional Harness
Extension Available
5ft, 10ft, 15ft or 20ft

Page 12 of 36
D714425 REV A 9/18
INSTALLATION
Step 4 a – Mount the d river and passenger r ide he ight s ensors
‘Step -1 Support the Vehicle ’ on page 10 MUST be performed before installing the ride -
height sensors.
The ride -height sensor body is mounted to the chassis and its arm is connected to
the axle with a linkage rod .
Refer to the air suspension Installation Drawing to determine the ride height
dimension.
The illustration below is for reference only:
The ride -height sensors are mounted at the rear left and right axles of the v ehicle.
For normal travel, the arm should face towards the rear of the vehicle and should be
perpendicular to its body when at ride height. As the vehicle chassis lowers , the
Driver (left ) sensor arm should rotate counter -clockwise and the Passenger (right )
sensor arms should rotate clockwise .
The ride height sensors are identical, so it does not matter which sensor goes on the
left or right. However, the harness connectors are specic to Driver (left) and
Passenger (right).
** IMPORTANT **
Do not remove the rubber retaining ring until after insta llation of the ride height
sensors. Otherwise, the arm may hang down and damage the ride height sensor as
the mounting bolts are tightened.
Be careful when attaching the linkage rod to the ride height sensor arm. The arm is
intended to be rotated up and d own only . Electronic ride height sensors are more
susceptible to damage from side -to-side movement compared to pneumatic height
control valves.
Ride
height
sensor
Linkage
Rod

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D714425 REV A 9/18
INSTALLATION
Ride height is w hen the arm is at the mid position of the ride height sensor .
The nominal design target is typically +/- 30°. However , th e abs ol ute
ma x im um ra n ge of +/- 45° must never be exc ee ded.
After installation of the linkage rod, the l ever allows a rotation of 12 degrees,
which is adjusted during ride height setup , as described in System Setup, step
2b.
Arm
+
/- 30° Nominal Arm
Range
+
/- 45° Maximum Arm Range
12° Lever Adjustment
Range
Lever

Page 14 of 36
D714425 REV A 9/18
INSTALLATION
Step 4b – Harness c onnect ions to the r ide h eight s ensors
Connect the left and right ride height sensor harness connectors to their respective
ride height sensors. Firmly press to push the connector in to ensure it latches. Ensure
the seal does not bulge out as shown in the image below.
Cut o the rubber ring 1after installation of the ride height sensors is complete .
The connector with the YELLOW wire plugs into the driver (left) side sensor.
The connector with the VIOLET wire plugs into the curb (r ight) side sensor.
Note 1
Only r emove the
rubber ring after
the ride height
sensors have
been installed .
Driver (Left ) Side
Bulged Seal: reseat
connector to remove
bulge
Rubber ring
1
Driver/Left Harness
(Yellow wire)
Linkage
Rod
Body
Seal
Arm
Seal
Linkage
Rod
Arm
Body Passenger/Right Harness
(Violet wire)
Passenger (Right) Side
Properly seated seal
:
no bulge
Rubber ring
1

Page 15 of 36
D714425 REV A 9/18
INSTALLATION
Step 5a – Feed the harness into the cab
The rocker switch and CAN bus harness is always fed into the cab. To feed the
harness thro ugh a smaller cab access hole, the rocker switch connector may
be removed by cutting the Status and K neel wires and re -connect ing using
splices as per instructions in Installation, step 5c .
Step 5b – Mount the rocker switch
The rocker switch may be mounted in the dash to facilitate driver access, or in
any other accessible, dry location away from the elements . Refer to
Installation, step 5c for instructions on how to extend the rocker switch wires
usin g splices .
A rocker switch mounting bracket is supplied as part of the kit.
The main harness includes a pre -wired connector which plugs into the switch .
Ensure there is enough slack in the harness to reach the switch before
connecting the other wires.
Status Indicator
Switch Activate
Indicator
Mounting Bracket
Main
Harness

Page 16 of 36
D714425 REV A 9/18
INSTALLATION
Step 5c – Extend r ocker s witch w ires ( if required)
If the rocker switch is not installed in the cab, the rocker switch connector wires
must be extended.
Use a suitable s plice method to extend the wires. Please note the followin g:
Extension wir es must be 18 gauge
automotive grade TXL, GXL, or
SXL. If possible, use the same
color as the original , and create
and attach matching wire labels.
Ignition:
Use a suitable splice to connect the A & C
ignition wires and the ex tension wire:
Ground:
Attach the ground wire (B) to a ground point adjacent to the
rocker switch. Cut and splice to extend if required.
Status and Kneel :
Cut the Status (F) and Kneel (G) wires as
shown at right and reconnect with sui table
splices.
A: Ignition
B: G round (common)
C: Ignition
D: Rocker Switch Connector
E: OBD -2 Har ness Connector
F: Status
G: Kneel
To main harness
Extension to
rocker
switch connector
Ignition in
the cab
C
A
Important : Splices must be performed s o that they are in a dry,
accessible location away from the elements.
E
D
B
C
A
G
F

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D714425 REV A 9/18
INSTALLATION
S tep 5 d – Connect ignition and DC c ommon control wires
Connect the three (3) wires (A, B & C) for the ignition and DC common.
Item Wire Colo r Description
A Ignition * Pink +12VDC when ignition on
B Common Black Battery DC Common (for switch indicator)
C Ignition * Pink +12VDC when ignition on
D Connector for Rocker switch
E Connector for OBD -2 harness
Note *: Connect both pink ignitio n wires to the same ignition signal
C
B
E
D
A

Page 18 of 36
D714425 REV A 9/18
INSTALLATION
Step 5 e – Connect to the v ehicle CAN bus network
The control module is designed to communicate on the vehicle CAN bus network.
A harness with an OBD -2 connector is provided as part of the kit. This provides a
plug-in connection to OBD -2 diagnostic port under the dash. However, the harness
may be directly spliced into the vehicle CAN bus network after cutting the OBD -2
harness at location ‘A’.
The OBD -2 Dash connec tor ‘B’ has
the CAN High and CAN Low wires
connected to pins 6 and 14,
respectively.
Connection ‘ C’ is required for service and
maintenance by connection to an
optio nal databridge (see Owner’s
Manual D714424) .
Choose connection method Aor B :
A. Cut the OBD -2 Harness as shown, and
splice into the vehicle CAN bus harness.
Yellow wire = CAN High
Green wire = CAN Low
OR
B. Plug the OBD -2 connector into the
diagnostic port.
OBD -2 Harness
Main
Harness
OBD -2 diagnostic Port
If required, remove cable(s)
from loom to increase
separation length
B
A
C

Page 19 of 36
D714425 REV A 9/18
INSTALLATION
Step 6 – Connect doo r s witch input
The wiring harness includes a DOORwire for connection to a door switch.
This wire has protective heat -shrink installed on the end, for when the door
option is not used.
With the ignition on and a ve hicle speed less than 10 mph, a 12VDC signal on
the DOORwire indicates the door is open and so the vehicle will immediately
kneel.
With the ignition on, as soon as the door is closed and the DOOR wire is open
circuit or connected to the vehicle chassis ( battery DC common), the vehicle
will immediately raise up to restore travel ride height.
Do
or closed = Switch open
Do
or open =Switch closed
C
onnect to either
+
12V DC vehicle
ig
nition, o r battery
+
12V DC
DOOR
Cut of f heat sh rink and
connect to door switch
Main harness
Position 3 of the 18 position
harness circular connector