Vmac VR70 Installation Manual
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Vmac VR70 Installation Manual

Underhood air compressor
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V R 7 0 U N D E R H O O D
A I R C O MP R E S S O R
I N S T A L L A T I O N MA N U A L
V 9 0 0 0 8 8
2 0 0 7 F R E I G H T L I N E R M2
7 . 2 L C a t e r p i l l a r C 7 A C E R T D i e s e l
w w w . v ma c a i r . c o m

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  • Page 1 V R 7 0 U N D E R H O O D A I R C O MP R E S S O R I N S T A L L A T I O N MA N U A L V 9 0 0 0 8 8 2 0 0 7 F R E I G H T L I N E R M2 7 .

  • Page 3: Table Of Contents

    5.3 Testing Operation............. 25 5.4 Setup, Performance Testing and Adjustments ..... 26 5.5 System Identification and Warnings ......27 5.6 Auxiliary Air Receiver ............28 Accessory Products from VMAC ..........29 VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 4: Installation Manual For Vmac Systems V900088

    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.

  • Page 5: General Information

    Measure the hose shortfall and order a Hose Extender Kit. The following table shows the color code used by VMAC to identify hose diameters. Hose Diameter Colour-Coded Label...

  • Page 6: Part 1: Installing The Control Components

    Part 1: Installing the Control Components VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 7: Locating The Modules And Wires

    PTO top engine limit = 2750 (default) • If the engine is programmed before the VMAC throttle is installed, the system will check for a signal when the ignition is on in PTO mode. The check engine light will illuminate but will shut off once the throttle is installed.
  • Page 8 Engine Control Module Transmission Control Module Bulkhead Module Chassis Control Module Figure 1.1 Firewall Top Connector B5 Dash Harness Engine Compartment Cab Under Dash Figure 1.2 VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 9 145. With the engine running, check for continuity to ground in both Park and Neutral and an open circuit in all other gears. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 10: Installing Components

    Connect the white interface connector to the matching connector from the control box. □ Connect the two red wires from the interface connector to the red wires with the matching connectors from the throttle controller. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 11: Connecting The Wiring

    Connect pin 87 to a 12 Volt source. □ Connect pin 86 on the relay to connector B5 wire “G” at the bulkhead connector using the purple wire (Figure 1.2). VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 12 Check each wire to make sure pins have locked in the sockets. □ Secure all wiring away from hot or moving parts, install the plastic ECM cover and tie-wrap all wires VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 13 □ Connect the black wire from the interface connector to the wire at pin “F” on connector C3 of the chassis module (Figure 1.3). Solder and seal the connection. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 14: Part 2: Preparing For Installation

    Remove the bolts and steel ring from the front of the crankshaft pulley. Thoroughly clean the inside of the OEM crank pulley to ensure a good fit for the VMAC pulley. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622...
  • Page 15 □ Place the VMAC crankshaft pulley adapter and crankshaft pulley in position over the OEM pulley, place the steel ring over the VMAC pulley, align the holes, insert the M10 x 100 mm bolts and torque to specifications. □ Remove the fan from the fan clutch assembly.

  • Page 16: Part 3: Installing The Bracket, Compressor And Cooler

    M10 x 35 mm M10 x 55 mm Mount fuel filter here OEM 10 mm fuel M10 x 35 mm bolt filter mount bolts with flat washer Figure 3.1 VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 17 Install the intercooler tube. □ Place the compressor in position on the bracket and fasten it in place using the supplied bolts. □ Install the VR compressor drive belt (Figure 3.2). VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 18: Installing The Cooler

    □ Remove the lower radiator hose from between the radiator and the transmission cooler. Rotate it 90 degrees so that the radiator end of the hose faces backward. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 19 Adjust all tubes and hoses for best fit and tighten the clamps. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 20 Install the supplied hose to the top radiator spigot and insert the supplied steel coolant tube (Figure 3.4) into the other end. Insulated P-clip Supplied steel tube OEM hose Supplied hose Figure 3.4 VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 21 5/16 bolt and nut. Insert the bolt from the underside of the fan shroud. □ Close the radiator drain and fill the cooling system with the manufacturer recommended coolant. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 22: Part 4: Installing The Tank And Hoses

    (Figure 4.1). Step support Mount brackets MOUNT BRACKETS BOLTED ONTO THE FRAME RAIL Mount brackets MOUNT BRACKETS CLAMPED ONTO THE FRAME RAIL Figure 4.1 VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 23: Connecting The Steel Lines And Hoses

    Changing the position of the tank may require longer hoses. A hose extender kit is available from VMAC. □ Remove the four OEM bolts from the frame rail. They are located on the passenger side frame just behind the rear step support and in front of the drive shaft center support bearing cross- member.

  • Page 24: Completing The Installation

    4.3 Completing the Installation □ Remove the filter from the front of the tank and remove the cardboard protector. Fill the filter with VMAC compressor oil and lightly lubricate the gasket. □ Thread the filter in place and tighten 3/4 – 1 turn after the gasket contacts the base.

  • Page 25: Adding Oil To The System

    Remove the fill plug from the air inlet control valve and pour oil into the oil fill hole on the inlet control valve using a funnel. You must use the supplied VMAC compressor oil in this system. Failure to use this special oil will result in damage to the compressor and will void your warranty.

  • Page 26: Part 5: Finishing And Testing

    Check the coolant after the engine reaches operating temperature. □ Check the compressor oil level after the engine has been shut down and the oil level has had time to stabilize. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 27: Testing Operation

    Engine speed should increase to 1800 RPM and then idle down to approximately 900 RPM once full tank pressure has been reached (150 psi). VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 28: Setup, Performance Testing And Adjustments

    9. Once the system pressure is at maximum, slowly open the ball valve on the test tool until the pressure on the gauge begins to drop. Engine speed should start to ramp-up when air pressure drops to approximately 140 PSI. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 29: System Identification And Warnings

    5.5 System Identification and Warnings Mark and drill two 7/64 inch holes, then secure the System Identification Number plate with self-tapping screws (Figure 5.2). This plate provides information which allows VMAC to assist in customer inquiries and the ordering of parts.. Firewall Driver’s door...

  • Page 30: Auxiliary Air Receiver

    The line from the VMAC tank to the auxiliary air receiver must have a one-way check valve installed (part #3600078) to prevent blow back from the auxiliary tank to stop moisture from entering the VMAC tank (Figure 5.4).

  • Page 31: Accessory Products From Vmac

    Accessory Products from VMAC The following accessory products for your VR compressor system are available from VMAC. For more information or to order these products, call 1-800-738-8622. Eliminator Aftercooler Removes up to 80% of moisture from compressed air. Quick installation,...
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  • Page 36 Ma n u f a c t u r e d b y P H 2 5 0 - 7 4 0 - 3 2 0 0 F X 2 5 0 - 7 4 0 - 3 2 0 1 T F 1 - 8 0 0 - 7 3 8 - 8 6 2 2 1 3 3 3 K i p p R o a d , N a n a i mo , B C , V 9 X 1 R 3 C a n a d a w w w .

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