Parker 404 - Brake Mounting

404/406XR Series Product Manual Chapter 5 - Component Mounting Procedures
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Parker Hannifin Corporation
1140 Sandy Hill Road
Irwin, PA 15642
www.parkermotion.com
Brake Mounting
Tools Required For Adjustment Allen Key, Loctite # 242 & 638, 24V power source, Dial
indicator
Electromagnetic Brake Assembly used to prevent back-driving in vertical applications.
 Locate and remove rear bearing cover plate (opposite motor end) by removing (2) button head screws.
 Locate and remove top cover by removing (4) button head screws.
 Locate brake and remove the outer cover by removing (2) socket head cap screws with an M2.5 Allen key.
 Energize the brake by adding a 24V power supply and placing the brown wire in the positive (+) outlet and
placing the blue wire in the negative (-) outlet.
 Remove the clamp with the 9/64” Allen key and the clutch. Remove the magnet housing by removing the (2)
socket head cap screws with an M2.5 Allen key. Remove the extension shaft.
 404XR – Clean the ballscrew shaft counterbore, ensuring that no oil or foreign material is present. Using a
cotton swab, apply a light film of Loctite #638 to the counterbore ID.
406XR – Clean the idler end of the ballscrew shaft extending through the bearing block using a clean cloth,
and acetone or alcohol. Remove all oil or foreign material that might be present.
 404XR – Locate the extension shaft (wedge and mandrel) and insert until it stops.
406XR – Locate clamp collar & mandrel. Slip the clamp collar over the large end of the mandrel and slide it up
until it contacts the shoulder. Slip the mandrel through the end block and over the extended portion of the
screw shaft. Using the access hole through the endblock, tighten the clamp collar screw.
 Verify concentricity. Using a dial indicator, measure the run out (wobble) on the end of the screw shaft by
turning the drive screw. Run out should not exceed .001in”
 Replace top cover and tighten (4) button head screws.
 Connect the brake cable to the extension cable and energize the brake by adding a 24V power supply and
placing the brown wire in the positive (+) outlet and placing the blue wire in the negative (-) outlet.
 Leaving the brake energized, slide the magnetic housing over the brake mandrel and tighten with (2) socket
head cap screws and (2) schnorrs.
 Slide the clutch and clamp on to the brake mandrel. Use a feeler gage to set the gap at 0.006” for a 404XR
brake or 0.007” for a 406XR brake. Tighten the clamp on the mandrel while pressing against the clutch and
feeler gage. Remove the feeler gage.
 Move the table the entire travel length and check for unusual noises or dragging while energized. If rubbing
occurs check mandrel run out. If run out is within tolerance and noise persists then reset the clutch gap.
 Shut off power supply and be sure the brake is engaged.
 Install brake cover, and tighten without Loctite. Be sure that the wires are snug inside the brake cover
including the strain relief, and the yellow cable is to be placed in the wire cavity so that it does not get
pinched.
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