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Perform this procedure on these machines:

• VF-1/2 made after December 15, 2013
• VF-3/4/5 made after April 1, 2014
• VF-6/7/8/9/10/11/12 made after April 15, 2014
• Mini Mills made after December, 2016

 Note: Mini Mills made after July 1, 2017 will need I/O PCB (34-3480C) or newer. Do not use I/O PCB (34-3482C).

• Toolroom Mills made after December, 2016

 Note: Tool Room Mills made after July 1, 2017 will need I/O PCB (34-3480C) or newer. Do not use I/O PCB (34-3482C).

Open the bleed valve on the air manifold.

Do this until all air pressure is released. Make sure that the air pressure is 0 psi (0 bar).

Remove and discard the manifold plug [1].

Clean the port threads [2] on the manifold .

Install the SOLENOID ASSY MANIFOLD [A] into the manifold port. The solenoid has a red cable tie [3] on the push lock fitting.

Connect the factory-installed 1/4" red tube [4] to the solenoid.

 Note: Refer to the Air-Lubrication System decal inside the lubrication cabinet for correct solenoid placement.

Connect the solenoid cable to the connector that has the "AUTO AIR GUN" label on the connector panel.

If the machine does not have PCOOL, remove the top spindle cover.

 Note: If the machine has PCOOL with an access port behind the PCOOL bracket [3], do not remove the top spindle cover. Remove the PCOOL bracket to get to the access port.

Find the red 1/4" air tube [1] in the spindle head.

Put the tube through the rear slot [2] in the spindle head casting.

Install the spindle head cover.

Install the bracket:

• [1] 40-Taper spindle: install the BRACKET MQL AIR CYLINDER [C] to the right front side of the spindle head with the (2) BOLT, BHCS 1/4-20 X 3/8 [B].
• [2] 50-Taper spindle: install the BRACKET MQL AIR CYLINDER [C] to the bottom right-front corner of the spindle head with the the (2) BOLT, BHCS 1/4-20 X 3/8 [B].
• [3] Mini Mill, Super Mini Mill, or Toolroom Mill : attach the BRACKET MQL AIR CYLINDER [C] to the AAG MOUNT BRKT MM/TM [J] with the (2) BOLT, BHCS 1/4-20 X 3/8 [B]. Remove the (2) screws [4] from the PCOOL bracket. Use the screws to install the completed AAG bracket assembly to the PCOOL bracket.

Assemble the air gun:

• [1] 40-taper spindle
• [2] 50-taper spindle
• [3] Mini Mill, Super Mini Mill, and Toolroom Mill

Put the AAG MQL AIR CYL COLLAR CLAMP [D] into the bracket.

Put the CYLINDER, AIR AAG SEAT CLAMP BINDER [E] through the bracket.

Attach the NUT, 1/4-28 [F] to the clamp binder.

Install the CYLINDER, AIR AAG MQL [G] into the cylinder clamp.

Push the air cylinder fully down into the cylinder clamp and tighten the clamp.

Install the red 1/4" air tube [3] to the air gun.

Adjust the air gun:

• [1] 40-taper spindle and Mini Mill, Super Mini Mill, and Toolroom Mill
• [2] 50-taper mill

Push [POWER ON].

Jog the Z Axis to the top of travel.

Push [EMERGENCY STOP].

Loosen the cylinder clamp handle [E]. Move the air gun until the top of the cylinder [G] is 3" (76 mm) above the cylinder clamp [D].

Make sure the air gun has at least 1/2 " (13 mm) clearance from all surfaces

Tighten the cylinder clamp handle [E].

Insert the ROLL PIN [H].

Open the primary air valve. This supplies air to the machine. Examine the air hoses for leaks.