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
S y s t e m V 9 0 0 0 7 9
2 0 0 4 . 5 - 2 0 0 5 G MC C 4 5 0 0 - 5 5 0 0
6 . 6 L D u r a ma x 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 S y s t e m V 9 0 0 0 7 9 2 0 0 4 .

  • Page 3: Table Of Contents

    5.2 After Starting the Engine Checklist........27 5.3 Setup, Performance Testing and Adjustments....28 5.4 System Identification and Warnings........29 5.5 Auxiliary Air Receiver ............30 Accessory Products from VMAC ..........31 VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 4 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.

  • Page 5: General Information

    If you must move the tank, the lines may be too short. If this is the case, measure the hose shortfall and order a Hose Extender Kit. The following table shows the color code used by VMAC to define the different hose diameters. Hose Diameter Colour-Coded Label...

  • Page 6: Special Installation Notes

    The following special tools are required: • 36 mm 12 point 1/2 inch drive socket for removing the OEM crankshaft bolt • crankshaft locking tool (GM #J-44643) or VMAC equivalent (Part #5900010) • VMAC crankshaft pin extraction tool (Part #5900076) or equivalent The following additional materials are recommended: •...

  • Page 7: Part 1: Preparing For Installation

    Remove the fan using the appropriate fan wrench. □ Remove the passenger side intercooler tube and hoses. □ Remove and discard the heater hose and metal connector pipe from the lower radiator hose. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 8 □ Install a crankshaft locking tool, remove the crank pulley bolt and remove the crank pulley. If you are using the VMAC tool: • put the socket on the nut • put the single-pin end of the tool on the front of the pulley with the locking tool hanging straight down •...

  • Page 9: Dual Alternator Trucks

    Loosen the top mounting bolt on the driver’s side alternator and remove the lower mounting bolts. □ Install the supplied bracket under the alternator and insert the mounting bolts. □ Push the alternator upward and tighten all the bolts. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 10: Part 2: Installing The Main Bracket And Compressor

    Install OEM back idler here Install the OEM tensioner here OEM 10 mm nuts M10 x 85 mm socket head bolts (one behind the VR tensioner) Figure 2.1 VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 11 Attach the straight end of the short 1/2 inch hose to the fitting on the side of the compressor, route the hose over the top of the compressor behind the clutch assembly and tighten the fitting. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 12 Place the compressor on the mounting bracket and install two M8 x 25 mm bolts in the front holes and one M8 x 20 mm bolt in the rear hole, complete with serrated washers. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 13: Installing The Cooler

    Place the cooler support bracket on the two bolts with the center hole facing toward the front of the vehicle, install flange lock nuts on the bolts and torque to specifications. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 14 Heater hose connection 1” To engine 1” To Radiator To coolant expansion tank 12” 7 1/2” Figure 2.7 VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 15: Connecting The Hoses

    Connect the heater return from the lower radiator hose to the heater hose using the supplied hose barbs and hose, cutting the hose to length as required for a good fit. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 16: Part 3: Installing The Tank And Hoses

    □ Place the tank on a work bench with the front (oil filter end) of the tank to your right. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 17 C-clamp holes and into the tank bracket. Repeat for the lower C-clamp holes and tighten all the bolts. □ Tighten the 1/4 and 5/16 inch fittings on the back of the tank. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 18: Filling The System With Oil

    You must use 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 19: Completing The Installation

    Install the straight hose connector fitting to the banjo fitting on the steel fuel rail (originally connected to the top of the module) with the hose connector pointing up and toward the driver side of the truck. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 20 □ Install all other OEM parts removed previously. Check all the hoses, lines and OEM harnesses to make sure that they are secured and protected. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 21: Part 4: Installing The Control Components

    Part 4: Installing the Control Components VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 22: Installing The Control Components

    • white wire with a plug connector • white wire with no connector • automatic transmission vehicles – blue wire with no connector □ Leave all other wires inside the cab. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 23: Connecting The In-Cab Wiring

    4.2.2 Manual Transmissions □ Cut the long blue wire to about 6 inches, strip the end and connect it to the short blue wire using the attached crimp connector. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 24: Connecting The Underhood Wiring

    Route the two grey wires and the white wire with the plug connector across the engine to the compressor. Connect the wires to the matching connectors at the compressor. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 25 Do not connect to the solid orange wire that may be in the same harness. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 26: Connecting The Power Supply Wire

    If there is no display, there is no power to the control box. □ Turn the control box switch to the “ON” position. The green light should come on and you should hear the compressor clutch engage. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...
  • Page 27 If the vehicle fails the test, check the wiring to make sure that all the connections are correct and secure. If you require additional assistance, contact your local VMAC dealer. Call 1-800-738-8622 or 250-740-3200. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622...

  • Page 28: Part 5: Finishing The Installation

    Loosen the banjo fitting at the high point of the fuel module and pump the primer on the fuel filter (Figure 5.1) to bleed air from the system. Tighten the fitting. Hand push pump Fuel filter Figure 5.1 VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 29: After Starting The Engine Checklist

    If you see unusual belt fluctuations during initial operation, stop the engine and move the tensioners back and forth, then restart the engine. Belt fluctuations should stop within the first 30 minutes of operation. VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 30: Setup, Performance Testing And Adjustments

    5. Operate the air compressor system until the oil is warm. 6. Observe the pressure gauge. Pressure should be approximately 150 psi (See the owner’s manual for adjustment procedures). VMAC – Vehicle Mounted Air Compressors Toll Free: 1-800-738-8622 Fax: 1-250-740-3201...

  • Page 31: System Identification And Warnings

    The System Identification Number Plate must be attached to the vehicle at the time of installation (Figure 5.3). This plate provides information which allows VMAC to assist in customer inquiries and the ordering of parts. Mark and drill two 7/64 inch holes, then secure the plate with self-tapping screws.

  • Page 32: 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 5.5).

  • Page 33: 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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