Vmac VR70 User manual

2015-2011 GM 2500HD-3500HD
6.6L Duramax Diesel
#V900113
www.vmacair.com
VR70 UNDERHOOD
AIR COMPRESSOR
INSTALLATION MANUAL

VMAC –Vehicle Mounted Air Compressors
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Installation Manual for VMAC
System V900113
2015-2011 GM 2500HD-3500HD
6.6L Duramax Diesel
General Information..................................................................... 3
Before You Start....................................................................... 3
Additional Requirements .......................................................... 3
Part 1: Warranty and System ID................................................. 5
Part 2: Preparing for Installation................................................ 8
2.1 Preparing for Installation - Electrical................................... 8
2.2 Preparing for Installation - Mechanical............................... 12
Part 3: Installing the Control Components ............................... 17
3.1 Installing the Components.................................................. 18
3.2 Connecting the In-Cab Wiring............................................ 18
3.3 Connecting the Under-Hood Wiring............................. 19
Part 4: Installing the Tank and Hoses........................................ 21
4.1 2015MY - Installing the Tank and Brackets ....................... 21
4.2 2014-2011MY - Installing the Tank and Brackets.............. 26
Part 5: Installing the Main Bracket, Compressor, and Cooler 30
5.1 Installing the Main Bracket and Compressor ..................... 30
5.2 Installing the Oil Cooler ...................................................... 35
5.3 Connecting the Hoses........................................................ 38
5.4 Completing the Installation................................................. 39
5.5 Adding Oil to the System.................................................... 41
Part 6: Finishing the Installation................................................ 42
6.1 Connecting to Switched Power .......................................... 42
6.2 Securing the Wiring............................................................ 42
6.3 Safety Test ......................................................................... 43
6.4 Before Starting the Engine Checklist.................................. 43
6.5 After Starting the Engine Checklist .................................... 44
6.6 Setup, Performance Testing and Adjustments................... 45
6.7 Auxiliary Air Receiver ......................................................... 46
Accessory Products from VMAC ............................................... 47

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Installation Manual - Document #1930185
System V900113 –2015-2011 GM 2500HD-3500HD 6.6L Duramax Diesel
Changes and Revisions
Version
Revision Details
Revised by/date
Approved by/date
Implemented
C
ECN 12-093
SAR 14 Jun 12
MH 21 Jun 2012
29 Jun 2012
D
MY update ECN 12-153
SAR 24 Oct 2012
MH 14 Nov 2012
16 Nov 2012
E
ECN 13-013
SH 23 Jul 2013
SM 26 Aug 2013
27 Aug 2013
F
ECN 13-121 –Fig 2.6
ECN-14-035 –2015MY
MC 28 Nov 2013
MPater 12JUN2014
MP/DB 19 Jun 2014
19 Jun 2014
Important Information
The information in this manual is intended for certified VMAC installers who
have been trained in installation procedures and for people with mechanical
trade certification who have the tools and equipment to properly and safely
perform the installation. Do not attempt this installation if you do not have the
appropriate mechanical training, knowledge and experience.
Follow all safety precautions for underhood mechanical work. Any grinding,
bending or restructuring operations for correct fit in modified trucks must
follow standard shop practices.
All hoses, tubes, and wires that are rerouted or shifted
during installation must be secure so that they do not
contact excessively hot areas or sharp edges. When
possible, use rubber coated P-clips. Follow the routing
suggestions in this manual and cover all hoses with the
supplied plastic loom.
These instructions are a general guide for installing this system on standard
production trucks and do not contain information for installation on non-
standard trucks. This system may not fit special order models or those which
have had other changes without additional modifications. If you have
difficulty with the installation, contact VMAC.
The VMAC warranty form is located at the back of this manual. This
warranty form must be completed and mailed or faxed to VMAC at the time
of installation for any subsequent warranty claim to be considered valid.
To order parts, contact your VMAC dealer. Your dealer will ask for the
VMAC serial number, part number, description and quantity. To locate your
nearest dealer, call 1-888-241-2289.
Copyright 2014
All trademarks used in this manual are the property of the respective copyright holder.
The contents of this manual may not be reproduced in any form without the express
written permission of VMAC, 1333 Kipp Road, Nanaimo, BC V9X 1R3.
Printed in Canada

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General Information
Before You Start
Read this manual before attempting installation so that you can
familiarize yourself with the components and how they fit on the
truck. Identify variations for different model years and different
situations that are listed in the manual. Open the package, unpack
the components and identify them.
All fasteners must be torqued to specifications. Use manufacturers
torque values for OEM fasteners. Apply Loctite 242 or equivalent
on all engine-mounted fasteners. Torque values are with Loctite
applied unless otherwise specified.
STANDARD GRADE 8 NATIONAL COARSE THREAD
Size
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
Foot-pounds (ft-lb)
9
18
35
55
80
110
170
280
Newton meter
(N•m)
12
24
47
74
108
149
230
379
STANDARD GRADE 8 NATIONAL FINE THREAD
Size
3/8
7/16
1/2
5/8
3/4
Foot-pounds (ft-lb)
40
60
90
180
320
Newton meter (N•m)
54
81
122
244
434
METRIC CLASS 10.9
Size
M8
M10
M12
M14
M16
Foot-pounds (ft-lb)
19
41
69
104
174
Newton meter (N•m)
25
55
93
141
236
Additional Requirements
Special Tools
OEM crankshaft locking tool (GM #J-44643) or VMAC #5900010.
36mm 12-point socket for removing OEM crankshaft bolt.
VMAC crankshaft pin extraction tool #5900076
Pneumatic fan wrench removal set (such as Lisle 43300) or a
manual fan pulley holder (such as KD3900).

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Hose Information
Depending on other installed equipment, it might be necessary to
move the air/oil separation tank from its intended location. The
hoses used in VMAC compressor systems have a specific inner
liner that is compatible with our compressor oil. Use of hoses other
than those supplied or recommended by VMAC may cause
compressor damage and may void your warranty. Please contact
VMAC for information on replacement hoses and hose extension
kits.

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Part 1: Warranty and System ID
□Complete the warranty form. The VMAC warranty form is
located at the back of this manual. This warranty form must be
completed and mailed or faxed to VMAC at the time of
installation for any subsequent warranty claim to be
considered valid.
System Identification and Warnings
The System Identification Number Plate must be attached to the
vehicle at the time of installation. This plate provides information
that allows VMAC to assist in customer inquiries and the ordering
of parts.
□Place the system identification number plate on the plastic
upper radiator cover in an appropriate area close to the
compressor.
□Mark and drill two 7/64-inch holes in the top of the cross
member in front of the OEM air filter box. Secure the plate
with supplied self- tapping screws
□Clean cross member beside the number plate and stick the
VMAC belt routing diagram to the cross member.
□Affix the VMAC belt routing diagram to an appropriate place
near the OEM belt diagram.
□As part of the installation process, ensure that the safety and
operational instruction decal is affixed in an obvious location
so that it can be seen by vehicle operators (Figure 1.1).

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Figure 1.1

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□To alert any technicians that may service the vehicle, affix the
servicing caution/contact label in the engine compartment near
the hood latch in a visible location. Thoroughly clean the
selected area before affixing the label (figure 1.2)
Figure 1.2

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Part 2: Preparing for Installation
Preparation for installation is very important. Missing an item can
cause problems in the installation or even damage to components.
Check off each item as it is completed so that you do not miss any
preparation steps.
2.1 Preparing for Installation - Electrical
□Locate the wiring harness on the inside of the driver side frame
rail crossing from the driver side frame rail to the transmission
above the driver side PTO cover. (Figure 2.1) This harness is
close to connector X300.
Figure 2.1
□Remove electrical tape and peel back plastic loom from the
harness.
□2015:
Locate the two white with grey stripe wires in the bundle
□2014-2011:
Locate the two orange with black stripe wires in the bundle.
Connector X300

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2015: There are two white with grey stripe wires in the
bundle.
2014-2011: There are two orange wires with black
stripe in the bundle.
Follow the tests below to determine the correct wire.
□With the engine off, use a voltmeter with a bed of nails test
lead and probe each required wire and turn the ignition switch
to RUN.
□The correct wire will show 0 Volts in PARK or NEUTRAL and
12 Volts in all other gear selector positions.
□Turn the ignition switch off. Mark the wire for electrical
connections later in the installation process.
□Remove air filter assembly and air intake tube from the front
passenger side of the engine.
Whenever the engine or turbo intake is exposed, care
must be taken to cover all openings to ensure that no
foreign objects can enter and cause damage.
□Locate the wiring harness below the engine intake which runs
to the bottom of the passenger side of the engine bay. (Figure
2.2)

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White wire with black
stripe
Engine intake
Coolant reservoir
Figure 2.2
□Carefully open the bundle and locate the white wire with black
stripe. Probe the wire using a voltmeter and a bed of nails test
lead.
□Reassemble intake assembly and ensure that no electrical
connection is left unplugged.
□Start the engine. The voltmeter should read a stable voltage of
2.3-2.8 Volts while the engine is idling. If the voltmeter has a
frequency setting it should read the same frequency as the
engine RPM.
□Turn the ignition switch off. Mark the wire for electrical
connections later in the installation process.
□Locate the Air Conditioning pressure sensor located at the
front driver’s side of the engine. (Figure 2.3)

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A/C pressure
switch
Figure 2.3
□Remove loom and plastic tape.
□Cut the OEM connector off and splice the supplied extension
cable onto the harness ensuring the wire colors match. Use a
heat gun to seal the heat shrink connectors. Re-wrap harness
with protective loom.

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2.2 Preparing for Installation - Mechanical
□Disconnect the batteries.
□Remove the air filter assembly and air intake tube.
□Remove the passenger side and driver side fender liner. Save
the bolts and plastic clips, they will be used again to reinstall
the fender liners.
□Remove the plastic front skid plate. Save the bolts as they will
be reused later. Disconnect the OEM hose clamp holding the
larger radiator hose to the small diameter hose and modify as
shown (Figure 2.4) and save for reinstallation later.
Cut off tab flush with
bottom of hose clamp
Figure 2.4
□Drain the coolant. Save the coolant, as it will be reused later.
□Remove lower radiator hose. To remove the hose it must be
disconnected at;
The engine block (water pump spigot)
The radiator
The surge tank
The hard pipe running to the heater core
The last three connections can all be accessed from the
passenger fender well. Do not damage the radiator hose as it
will be modified and reused later.
□Remove the top radiator hose. Do not damage the radiator
hose as it will be modified and reused later.
□Remove the automatic transmission control module (ATCM)
mounted on the driver side of the fan shroud.

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□Remove the upper radiator cover and upper fan shroud. Save
the plastic clips to be reused later.
□Disconnect the fan clutch wire harness from the fan clutch and
remove the fan wire harness and bracket.
□Remove the four bolts holding the fan stator to the engine, pull
the fan stator forward and remove the fan and clutch. Lift the
fan and stator out of the truck together.
□Modify the lower stator mount by cutting a notch to clear the
VR pulley and belt that will be installed later. (Figure 2.5)
3/4"
2-1/2”
1/4”
Remove shaded
area
Stator (partial view)
Lower Mount
Figure 2.5
□Remove the OEM fan wire bracket pin from the engine block.
This pin was used to connect the fan wire harness bracket to
the engine.
□Install the supplied fan wire bracket pin replacement. Install in
the threaded boss on the front of the engine to the lower right
of the engine oil fill spigot. (Figure 2.6)
OEM fan wire bracket
pin location
OEM belt line
New supplied fan
wire bracket pin
Figure 2.6

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□Remove the OEM serpentine belt.
□Install a crankshaft-locking tool, (see Additional Requirements
above) and remove the crank pulley bolt and OEM crank
pulley. If you are using the VMAC tool:
Put the appropriate socket on the nut
Put the single-pin end of the tool on the front of the pulley
Using a long flex bar turn the engine CCW until the pin
makes contact with the balancing boss on the OEM pulley
and the opposite end of the tool contacts the frame rail.
Remove the bolt and pulley from the crankshaft.
□Remove the crankshaft pin using the VMAC extraction
tool(Figure 2.7):
Reinstall the crankshaft bolt and use the flex bar to slowly
turn the engine over CW until the pin is facing upwards.
Fit the split end of the tool (on the end of the shaft) over
the crankshaft pin and tap downward with the slide-
hammer to make sure that it is seated correctly
Fit the split end of the tool (on the end of the shaft) over
the crankshaft pin and tap downward with the slide-
hammer to make sure that it is seated correctly
Tighten the pinch bolt securely.
Use the hammer action of the slider in an upward motion
to remove the pin from the crankshaft
Remove the crank bolt and discard. Save the washer for
re-use later.
Be careful to support the tool and keep it aligned with
the pin. If it is not the tool may slide off and damage
the pin making it difficult to remove.

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Slide
Pinch Bolt
OEM Crank Pin
Figure 2.7
□Install the replacement crankshaft/harmonic balancer-locating
pin and tap it home using a brass drift and a small hammer.
Ensure that the head of the pin is aligned with the crankshaft
by twisting it into position with a crescent wrench.(Figure 2.8)
High-strength
crank pin
Figure 2.8
□Apply a light wipe of oil to the inside of the OEM crank pulley
and install the pulley back onto the crankshaft.

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□Place the VR crank pulley in position with the two roll pins on
both sides of the balance weight on the OEM pulley. (Figure
2.9)
□Thread the M18 x 100 mm center bolt with OEM washer into
the crankshaft. Install an engine-locking tool and torque the
center bolt to 250 ft•lbs.(Figure 2.9) The VMAC crankshaft
locking tool can be used again by fitting the two pins on the
other end of the tool into the holes on the VMAC pulley.
Position the roll pins here
Figure 2.9
□Reinstall the OEM belt.

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Part 3: Installing the Control
Components
Figure 3.1

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3.1 Installing the Components
□Install the control box in a convenient location in the cab,
positioned so the wire harness will reach the compressor
located at the front driver side of the engine.
□Mount the throttle control box under the dash using plastic ties.
Select a location that will allow access to the adjusting screws.
3.2 Connecting the In-Cab Wiring
□Connect the interface wire harness connector to the matching
connector from the VMAC control box.
□Disconnect the multi-pin connector from the accelerator pedal
and plug it into to the matching connector at the throttle control
box then plug the connector from the throttle control box into
the accelerator pedal.
□Connect the wires with the ring connector from the throttle
control box and from the interface connector to a good metal
ground.
□Connect the red wire from the control box to the red wire from
the throttle control.
□Route the following wires through the accessory harness
grommet under the dash shown in Figure 3.2.
Cable with the black 3 pin connector
Cable with the green 4 pin connector
White wire with the bullet connector
White wire from the throttle control box
Blue wire from the throttle control box
Red wire from interface cable with inline fuse