Support the door before loosening hardware
Solid- wood, glass, mirrored, and oversized doors can shift suddenly. Use a helper and padded support. Never place fingers between the door and jamb while a hanger is unlocked.
First: identify the problem
Read the gap before touching the adjustment nuts
Slide the door almost closed, leaving a narrow line of light between its leading edge and the strike jamb. View the gap at eye level from several feet away. A tapered gap shows the direction the slab is leaning.
Top gap is tighter
The top is closer to the jamb. Lower the strike-side hanger, raise the rear hanger, or divide the correction between them.
Bottom gap is tighter
The bottom is closer to the jamb. Raise the strike-side hanger, lower the rear hanger, or divide the correction between them.
Important: “Raise” and “lower” describe the door at that hanger. Thread direction varies by manufacturer, so confirm the system before turning a nut.
Prepare
Tools and checks
Useful tools
- Correct hanger or open-end wrench
- 4- or 6- foot level
- Tape measure and pencil
- Screwdrivers or driver
- Wood shims and padded support
- Flashlight and vacuum
Check before adjusting
- Guide is centered and not pinching
- Hanger plates are tight
- Rollers stay engaged
- Track and jamb parts are secure
- No fastener projects into the pocket
- The slab is reasonably straight
Repair procedure
Realign the door step by step
Mark the starting position
Mark each adjustment nut or hanger stem. Measure floor clearance at both ends and note the jamb gap so an unhelpful change can be undone.
Expose the hanger adjustments
Open the door enough to reach the hangers. Remove only the head stop, removable split jamb, or casing required by your system. Score painted joints and protect reusable trim.
Support and unlock the hanger
Place padded shims beneath the door. Release the manufacturer’s lock tab, retaining clip, or locknut only as much as necessary.
Make one small correction
Turn the appropriate adjustment about one-quarter turn. Changing both hangers in opposite directions often corrects tilt while preserving floor clearance. Move both equally to raise or lower the entire door.
Close, measure, and repeat
Remove the support, roll the door through its full travel, and bring it almost to the jamb. Compare the gap again. Avoid several full turns at once.
Secure the final setting
Engage every lock tab, clip, or locknut. Tighten hanger plates and accessible track fasteners without stripping them.
Center the bottom guide
Set the guide so it controls sideways movement without squeezing or scraping the door. Replace a cracked, worn, or incorrect-width guide.
Perform the final operation check
Cycle the door at least ten times. Confirm an even jamb gap, floor clearance, smooth travel, lock alignment, secure stops, and no rubbing inside the pocket.
Troubleshooting
What the symptom usually means
| Symptom | Likely cause | Best next step |
|---|---|---|
| Gap is tight at top | Front hanger high or rear hanger low | Adjust height in small increments |
| Gap is tight at bottom | Front hanger low or rear hanger high | Reverse the adjustment |
| Straight when closed but rubs moving | Guide pinches, slab is warped, or pocket is obstructed | Inspect guide and scratch pattern |
| Door moves by itself | Track is out of level | Correct track or frame support |
| Angle changes during travel | Worn roller, loose plate, bent track, or moving frame | Repair unstable component first |
Deeper problems
When hanger adjustment is not the repair
Track out of level
If the door moves by itself, correct the header, track, or frame support. Hanger adjustment will not stop gravity.
Worn rollers
A wheel that binds, rocks, or changes height cannot hold alignment. Match replacements to the exact track and door weight.
Loose hanger plate
Support the slab and repair the fastening point. Screws must have sound material to hold.
Warped door or bowed pocket
Check the slab with a straightedge. A repeated rub point can indicate a bowed pocket or protruding fastener.
Double doors
Align each slab to its side jamb first, then compare center height and set the converging stop or latch.
Frame movement
Secure moving framing before fine adjustment or the repair will not hold.
Call a professional for glass, mirrored, unusually heavy, or partly detached doors; structurally loose tracks; possible utility conflicts; damaged framing; or repairs requiring a finished wall to be opened.
Compatible repair parts
Replace worn components when possible
Identify the track series and measure door thickness and weight before ordering. Roller and track profiles are not universally interchangeable.
Product links open HartfordBuildingProducts.com. Verify compatibility before purchasing.Common questions
Realignment FAQ
How much should I turn a hanger nut?
Begin with about a quarter turn, close the door, and recheck the gap.
Should I adjust one hanger or both?
Often both. Opposite adjustments rotate the slab while preserving clearance; equal adjustments raise or lower the whole door.
Can I realign the door without removing it?
Usually, if the nuts are reachable after limited trim removal. Some systems require partial or full detachment.
Why does it become crooked again?
Look for an unlocked adjustment, loose plate or track fastener, worn roller, or moving frame.
Should I trim the door?
Not until hardware, guide, track, jambs, floor clearance, and slab warp have been checked. Trimming is permanent.
A successful repair
What correct alignment looks like
- Leading edge is parallel to the strike jamb
- Door clears the finished floor
- Guide controls sway without binding
- Rollers stay quiet and engaged
- Pull, latch, and soft close operate normally
- Door stays where placed on a level track