the automatic document feeder on my canon jams on every single page, it just crumples them up inside

Diagnosis

The constant crumpling of paper in the Canon imageCLASS MF453dw Automatic Document Feeder (ADF) is typically caused by a "differential feed" failure. This occurs when the pickup roller successfully grabs the top sheet, but the separation pad (the small rubberized piece beneath the roller) fails to hold back the subsequent pages. Instead of feeding one sheet at a time, multiple sheets enter the narrow feed throat simultaneously, leading to an immediate accordion-style jam. Alternatively, this is often caused by "glazing" on the rubber rollers. Over time, paper dust and toner residue create a slick, polished film on the rubber surface. This loss of friction means the rollers cannot maintain a consistent grip on the paper as it transitions from the input tray to the scanning glass. If the paper slips even a few millimeters during the initial pull, it will enter the feed path at an angle, causing the guides to bunch the paper and crumple it. You can confirm this by looking at the rubber rollers; if they appear shiny or smooth rather than matte, they have glazed over and lost their coefficient of friction.

How to Fix It

To resolve the crumpling and restore the grip of the ADF, follow these precision cleaning and calibration steps:

1. Lift the ADF cover fully. Locate the primary pickup roller and the secondary feed rollers. These are the gray/white rubber cylinders located at the very top of the document path.
2. Prepare a lint-free microfiber cloth dampened with 90% or higher Isopropyl Alcohol. Do not saturate the cloth; it should be damp, not dripping, to avoid liquid seeping into the optical sensors.
3. Gently rotate the pickup roller by hand while applying firm pressure with the cloth. Wipe the entire circumference of the roller. You will likely see a gray/black residue on the cloth; continue this process until the cloth remains clean.
4. Locate the separation pad—the small, rectangular rubber piece directly opposite the pickup roller. Clean this pad thoroughly. If the pad is physically pitted or worn down to the plastic base, it must be replaced.
5. Clean the narrow plastic guide rails that lead from the tray to the scanner glass. Use a dry cloth to remove any tiny scraps of paper or adhesive residue from previous jams that might be catching the edge of the sheets.
6. Allow the alcohol to evaporate completely for 2-3 minutes before closing the cover and attempting a test feed with a stack of standard 20lb bond paper.

If That Didn't Work

• Replace the ADF Roller Kit: If cleaning does not stop the crumpling, the rubber has likely reached its end-of-life and hardened. Purchase the official Canon ADF Roller Replacement Kit. You will need to remove the plastic retaining clips on the sides of the roller assembly to slide out the worn rollers and snap in the new ones.
• Check for Foreign Objects: Use a high-intensity flashlight to inspect the feed throat for staples, paper clips, or small torn fragments of paper. Even a tiny sliver of paper lodged in the sensor flag can cause the printer to think a jam has occurred, triggering a timing error that leads to crumpling.
• Adjust Paper Guides: Ensure the side guides are snug against the paper but not pinching it. If the guides are too tight, the paper cannot slide freely; if they are too loose, the paper enters skewed. Adjust the guides so there is exactly 1mm of clearance on either side of the stack.
• Test Paper Weight: Verify that you are not using paper that is too thin (below 60 g/m²) or too thick (above 100 g/m²). The MF453dw ADF is calibrated for standard office paper; specialty labels or heavy cardstock will frequently cause the rollers to slip and the paper to bunch.

Heads Up

• Avoid using bleach-based cleaners or acetone on the rollers, as these chemicals will chemically melt the rubber and permanently ruin the grip.
• Periodically blow out the ADF area with canned compressed air to prevent paper dust from migrating into the image sensor.
• Always fan your paper stack before loading it into the ADF to break the static bond between sheets, which significantly reduces the likelihood of multi-page pulls.
• If you frequently scan documents with staples, ensure they are completely removed; a single missed staple can gouge the rubber rollers, creating a permanent flat spot that causes recurring jams.