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® Hydraulic Driven Air Compressor Installation and Owner’s Manual (Includes Service Instructions) H400005 | H400014 | H600013 Closed Center Hydraulic Systems Maintainer www.vmacair.com...
The procedures described in this manual are the only approved methods of service and operation. Ordering Parts To order parts, contact a VMAC dealer. The dealer will ask for the VMAC System ID (see page 33), part number, description and quantity. Locate the nearest dealer online at www.vmacair.com/dealer-locator or call 1-877-912-6605.
VMAC will not be held responsible for any liability, consequential damages, injuries, loss or damage to individuals or to equipment as a result of the failure of anyone to properly adhere to the procedures set out in this manual or standard safety practices.
Proper service and repair are important to the safety of the service technician and the safe, reliable operation of the equipment. Always use genuine VMAC replacement parts. The procedures described in this service manual are effective methods of service and repair.
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• Do not operate the compressor without guards in place. If the guards are damaged or missing, replace them before operating the equipment. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Never adjust or attempt to make any repairs to the compressor system while the hydraulic circuit is pressurized. Components and hoses under pressure could fail and cause serious injury or death. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
1 October, 2015. Warranty Registration The VMAC warranty registration form is located near the back of this manual. This warranty registration form must be completed and sent to VMAC at the time of installation for any subsequent warranty claim to be considered valid.
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VMAC will provide direction for repair or replacement of the failed components. If requested, failed parts must be returned to VMAC for evaluation. 4) Dealers may login to the VMAC website to view the "VMAC Labour Time Guide" (under “Agreements”) to see the allowable warranty labour times.
Driven Air Compressor system to operate erratically. Prior to installing the system, consider the following factors: • For proper operation, VMAC’s Hydraulic Driven Air Compressor Systems require proper hydraulic pressure and flow, ensure the hydraulic circuit is designed with these requirements in mind (see page 17).
Ensure adequate ventilation is provided for cooling and to evacuate the heat generated by the unit. If mounting in an enclosure, VMAC strongly recommends mounting the unit on a pullout drawer and extending the drawer any time the unit is run.
Hydraulic Driven Air Compressor will signal the PTO to set hydraulic flow to the minimum desired cfm. “Speed 2” is activated to signal the PTO to increase hydraulic flow to provide the maximum cfm (or speed system warm up). VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
Hydraulic Requirements This VMAC Hydraulic Driven Air Compressor is designed to be driven by a load sensing pressure compensated variable displacement hydraulic pump. VMAC is unable to provide hydraulic circuit designs or consult on specific hydraulic installations. We recommend working with a local hydraulic expert to design and/or install the hydraulic circuit that will power the Hydraulic Driven Air Compressor system.
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If the Hydraulic Driven Air Compressor system is being installed into an existing hydraulic circuit, ensure the circuit meets the requirements listed in this chapter. Filtration VMAC recommends that the hydraulic circuit meet or exceed ISO Code 16/13, SAE Class 4. See "Hydraulic Fluid and Line Sizing Recommendations" on page 19 for additional information.
Hydraulic Fluid and Line Sizing Recommendations VMAC is unable to provide hydraulic circuit designs or consult on specific hydraulic installations. We recommend working with a local hydraulic expert to design and/or install the hydraulic circuit that will power the Hydraulic Driven Air Compressor system.
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The following information provides specific line sizing recommendations for mobile hydraulic system installations intended for use with VMAC’s Hydraulic Driven Air Compressor systems. The dimensions provided indicate “inside diameter” (ID). Supply Line Sizing Failure to use the correct suction line size may result in hydraulic pump cavitation leading to premature pump failure.
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Table 5 — Temperate climate Pressure and Return Line Sizing Pressure Line Size Return Line Size 3/4 in 1 in Table 6 — Pressure and return line size VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
+ 0.5 V – + 4.5 V, 0 – 150 psi (ratiometric) Green – Pressure Signal Black – Ground 0 Ω Air Solenoid Colour Function Notes + 12 V Supply + 12 V Black Switched Ground Switched VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Thermistor Signal Varies with temperature - see thermistor Orange Voltage resistance tables for further diagnosis. Table 7 — Harness reference chart VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
Failure to adhere to these recommendations will cause the Hydraulic Driven Air Compressor system to operate erratically. VMAC’s Hydraulic Driven Air Compressor systems require a steady 20 A at 12 V dc (nominal) to operate. A 30 A fuse or circuit breaker is recommended.
(i.e. air receiver tank, hose reel, etc.). ☐ Mount the unit (Figure 5). • If using the VMAC Mounting Brackets (P/N: A700140), install them now. • If using the integral mounts, drill (×4) 13/32 in holes in the selected mounting location.
Testing" on page 74) into the hydraulic circuit at the supply line to the Hydraulic Driven Air Compressor to confirm actual hydraulic flow. ☐ Install the VMAC Air Test Tool (A700152) with the appropriate orifice and the ball valve closed. If the unit is vehicle mounted, ensure the vehicle is parked on level ground, the transmission is in “PARK”, with the parking brake...
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“Speed 1” does not drop below the minimum requirement. ☐ Open the ball valve on the VMAC Air Test Tool (if not using the VMAC Air test tool with the proper orifice, open the ball valve enough to maintain 100 psi) and operate the system for at least 1 hour at full load while monitoring the hydraulic flow and cfm output.
Compressor Performance Testing System operation can be tested using the tools that will be operated by the system or by using the VMAC Test Tool (A700052) with the appropriate orifice in the outlet to simulate tool use (Figure 6). Ball valve...
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The system will continue to monitor temperature and air pressure and will restart as needed to maintain operating parameters. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
Unique identifier Model number Revision letter Production date code Figure 8 — System ID breakdown Hydraulic System Variants H400005: White panels. H400014: Black panels. H600013: Black panels. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
200 psi pressure relief valve 3/4 in NPT to JIC adaptor 1/4 in oil (not included) scavenge fitting Figure 10 — AOST blowdown cap (back) VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Hot hydraulic fluid (from compressor) Electric Cool oil to compressor Hot compressor Liquid to air oil from AOST cooler Figure 12 — Compressor oil / hydraulic fluid cooler VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Hydraulic fluid Pressure compensator case drain temperature flow regulator (from motor) sensor Figure 13 — Hydraulic manifold Control Box Control box Figure 14 — Control box VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Air Solenoid Air solenoid Figure 15 — Air solenoid VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Figure 16 — Control Box Hoses / Tubes The hoses used in VMAC compressor systems have an AQP inner liner that is compatible with VMAC compressor oil. The PTFE tubes used in VMAC systems are rated for the high temperatures VMAC compressors generate. Use of hoses or tubes other than those supplied or recommended by VMAC may cause compressor damage and may void your warranty.
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Hot compressor oil is directed from the AOST to VMAC’s liquid to air cooler before being returned to the compressor. The liquid to air cooler also cools the hydraulic fluid to ensure the Hydraulic Driven Air Compressor does not add heat to the hydraulic circuit.
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This system is equipped with a load sensing manifold assembly; this assembly consists of an adjustable flow regulator with a maximum setting of either 14 gpm (H400005/H400014) or 21 gpm (H600013). The assembly also includes a load sensing ORB port which delivers a hydraulic pressure signal to the pressure compensated pump, allowing it to control the hydraulic fluid output.
System Operation (What to Expect at Start Up) When the temperature drops below 41° F (5° C), VMAC recommends preheating the hydraulic fluid prior to starting the Hydraulic Driven Air Compressor. Before Operating the Hydraulic Driven Air Compressor • Ensure the system is not mounted (or parked) on grades exceeding 15° as this will affect lubrication and air/oil separation (Figure 17).
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When no air use is detected, the system will first unload the compressor and then enter “Standby” to minimize fuel consumption, equipment wear, hydraulic and compressor temperature, and noise. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Disengage the hydraulic system. 4) If equipped, close the hydraulic shut-off valve. 5) Turn off the power supply to the Hydraulic Driven Air Compressor. Drain any stored air. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
Check the compressor oil level through the sight glass on the AOST (the oil level must be checked with the vehicle level). If the oil level is low, add VMAC compressor oil until the correct level is reached (see page 54).
(e.g. “SOFT START xxxC”). System Check The display will show “VMAC — WWW.VMACAIR.COM” and both the red and green LED lights will flash. The display will then show “SYSTEM CHECK / SYSTEM READY” and the system will go to the “Ready State”.
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The pressure sensor has failed or is disconnected. “CONNECTION ERR” There is a connection problem between the control box in the Hydraulic Driven Air Compressor and the display box. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
ERROR LOG (Figure 18) Record of the last 10 system errors. This information can be recorded on the VMAC troubleshooting form on page 83 and emailed to VMAC Technical Support to assist in troubleshooting issues. Scroll through the errors using the “” and “” buttons.
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COLD START LOG This is a record of the last 10 cold start temperatures (below 32 °F (0 °C). This information can be recorded on the VMAC troubleshooting form on page 83 and emailed to VMAC to assist in troubleshooting any issues.
Press and hold the “” button for 5 seconds. The display will show: “TEMP PROBE EN” indicating that the hydraulic temperature sensor in the manifold has been enabled. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
The IPL is available free of charge from VMAC. The part number portion of the System ID will be needed to locate the correct IPL. See "Identifying Your System" on page 33 for the System ID location.
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The following maintenance schedule must be observed to maintain both the “Standard” and “Lifetime” VMAC warranties and to assure proper performance and long service life of the system. In the event of a warranty claim, VMAC may request service records.
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500 Hour / 1 Year Service Kit P/N: A700156 Part # Description 3600037 Air filter 9200039 Oil filter A700094 VMAC High performance oil (4 L) A700152 Coalescing assembly 3600064 AOST Tank seal 3600090 Thimble screen 5840069 SPRING, COMPRESSION, FL 1.5”,OD .54...
Use only genuine VMAC parts to maintain the system. Genuine VMAC parts are designed to work with the high pressure and heat generated by the compressor. Substituting genuine VMAC parts may void the warranty and could cause equipment damage, injury, or death.
Wear appropriate Personal Protective Equipment and follow all industry standard safety practices. The VMAC supplied and approved compressor oil must be used in this system. Failure to use this special oil will result in damage to the compressor and will void warranty.
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Listen for the pressurized air to blowdown through the muffler on the AOST. Blowdown should be completed in approximately 20 seconds. ☐ If the muffler is showing signs of blockage, contact a local VMAC dealer for a replacement. Blowdown muffler Figure 21 —...
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☐ If the pressure relief valve is showing loss of functionality, contact a local VMAC dealer for a replacement. A replacement pressure relief valve is included with the VMAC 500 hour service kit.
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Replace the air filter cover and secure it with the cover nut. Do not over tighten the nut. ☐ If removed for service, reinstall the filter onto the filter bracket. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
Ensure the system is fully depressurized prior to beginning any service work. ☐ Check the old oil for any evidence of metal filings or contamination. If any metal filings are found, flush the hoses and the ASP using the VMAC flushing kit (P/N: A700214). PTFE Tubing, Loom, and Push-To-Connect Fittings •...
Inspect the Viton® O-ring on the oil drain plug for damage, hardness or defects and replace if necessary. ☐ Install and tighten the oil drain plug. ☐ Remove the oil filter (Figure 25). VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Remove the bolts retaining the blowdown cap. Unscrew the bolts evenly to avoid damaging the blowdown cap as the coalescing element is spring-loaded against the inside of the end cap. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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AOST (Figure 28). Figure 28 — Remove small spring and scavenge screen VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Failure to install the wave spring may cause an electric arc which could result in an explosion, tank rupture or fire. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Figure 31 — Install wave spring ☐ Install the Blowdown cap seal in the blowdown cap (Figure 32). Blowdown cap seal Figure 32 — Rear cap seal VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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☐ Remove the Oil fill cap (Figure 34). Oil fill cap Oil sight glass Figure 34 — Oil fill VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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The Display Box will show a reminder to “CHECK AIR FILTER” every 100 hours of operation. This is a time based message that will automatically disappear after 6 hours of operation. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
Additional troubleshooting and specific test procedures can be found on VMAC’s Knowledge Base www.kb.vamacair.com. See "System Adjustments (Diagnostics Mode)" on page 47 for instruction to access diagnostic information. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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The system will automatically shut down if either of the following conditions occur: • The hydraulic fluid reaches 190 °F (88 °C). • The compressor oil reaches 280 °F (138 °C). VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Faulty electrical Check electrical connections. connections. Bypass extension harness to test. CONNECTION ERR Failed Control Box or Check Control and Display boxes Display Box. for damage. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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See "System runs then shuts down, Voltage supplied to BATTERY LOW and display goes blank, then scrolls system is too low. company information." on page 71. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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(opens below 200 psi). Air pressure relief valve opens. Unload solenoid has failed Check solenoid and wiring. energized. Inlet poppet O-ring dislodged. Contact VMAC Technical Support. PTFE Pressure Control tube Check PTFE tube between air disconnected or failed. solenoid and inlet valve.
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Water in the air stream. Perform 500 hour service (P/N: A700156). Excessive water in compressor See "Excessive water in oil. compressor oil." on page 72 to troubleshoot. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Oil out the air filter / air filter (see page 17). saturated with oil. • Ensure engine rpm is being maintained when load is applied. Hydraulic motor failure. Perform case drain flow test. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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• Move Hydraulic Driven Air Compressor out of cabinet. Failed temperature probe or Check temperature probe and bad electrical connection. wiring connections. Incorrect compressor oil used. Incorrect compressor oil used. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
If the system does not meet VMAC’s requirements, we recommend consultation with a hydraulic specialist. A hydraulic flow meter with pressure gauge is necessary to verify that the hydraulic circuit powering the VMAC Hydraulic Driven Air Compressor is within specification (Figure 35). High pressure gauge...
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Observe the flow meter and ensure the hydraulic flow remains within the specifications listed above. ☐ Observe the pressure gauge and ensure the pressure is below 2,600 psi. VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
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Compressor is receiving the required hydraulic pressure and flow. ☐ Remove the line connected to the “PRESSURE IN” port of the VMAC Hydraulic Driven Air Compressor and connect it to high pressure port of the hydraulic test tool (Figure 37).
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☐ Using the valve on the hydraulic test tool, increase the pressure to 2,800 psi (this simulates the load created by the VMAC Hydraulic Driven Air Compressor. If the system will not reach 2,800 psi, the hydraulic circuit is not meeting the minimum requirements to run the VMAC Hydraulic Driven Air Compressor.
The VMAC compressor system will automatically depressurize when shutdown. The AOST has a built in check valve that prevents blow back and moisture from the receiver tank entering the AOST. Installation of an additional check valve will cause erratic performance.
Recommended Accessories While the compressor system will function without the following accessories, VMAC strongly recommends their use for optimal performance. See the “Accessory Product” section of this manual on page 80 for a list of products available for purchase through VMAC.
Compressor Service Kits 500 Hour or 6 Month / 1 Year Service Kit - Part number: A700156 Includes VMAC high performance compressor oil, oil filter, air filter, coalescing filter, pressure relief valve, and next service due decal. Air Aftercooler — 70 cfm...
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Air receiver tanks are used for lowering compressor duty cycle and removing water from compressed air; recommended for optimum operation of all VMAC Gas Driven, Diesel Driven, Hydraulic, and UNDERHOOD40 air compressors. Manufactured to FMVSS 121 standard; includes fittings, 170 psi pressure relief valve, and tank drain.
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Electrical: 12 V @ 10 Amps • Dimensions: 17.0 in (43.2 cm) L × 8.0 in (20.3 cm) W x 13.0 in (33 cm) H • Weight: 30 lbs (13.5 kg) VMAC - Vehicle Mounted Air Compressors VMAC Technical Support: 888-241-2289 VMAC Knowledge Base: kb.vmacair.com...
Error and Service Logs This form can also be found on the VMAC Knowledge Base by scanning (or clicking) the QR code below. Name: Company: Phone#: Email: VMAC Service Ticket/ CSR (If issued): Preferred VMAC Dealer (Optional): See "Entering DIAGNOSTICS mode" on page 47 for instruction on how to retrieve the service logs and error messages.
Warranty Registration This form must be fully completed and returned to VMAC at the time the vehicle is put into service. Warranty may be void if this form is not received by VMAC within 3 months of receiving the vehicle, or 200 hours of operation, whichever occurs first.
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