Full 25-point door and opener safety check with every visit - springs, cables, rollers, tracks, and your LiftMaster or Chamberlain opener included
You get a price before we start. It does not change when the truck arrives.
Amarr Cable & Drum Replacement: The Bothell Owner’s Guide
Amarr cable and drum replacement in Bothell typically runs $130-$250 installed, and we stock the common Amarr drum sizes on our trucks for same-day completion in most cases. The cable drum is the grooved wheel that sits on the torsion tube and winds the lift cable at a precise rate; when it cracks, strips, or the cable frays and jumps the groove, the door goes crooked or slams shut. Most Bothell homeowners notice the problem when one side of the door hangs lower than the other, or they hear a rhythmic thumping as the door moves.
Which Amarr Models This Applies To
Amarr uses several drum profiles across their product lines, and matching the wrong one changes the door’s lift geometry. The Classica collection and Stratford series typically run a standard-lift 400-8 or 400-12 drum for 7-foot and 8-foot doors. The Olympus and Heritage lines, common in the newer Canyon Park builds, often spec a high-lift or vertical-lift drum with a deeper groove pitch. The part number is cast into the drum face, but corrosion in Bothell’s wet winters can obscure it. We measure the drum diameter at the cable groove base, count the grooves, and check the torsion tube shaft size, usually 1 inch or 1-1/4 inch.
OEM Amarr drums ship from their distribution network with a lead time we don’t ask customers to absorb. We source quality aftermarket equivalents from DDM and IDC that match the groove spec and cast alloy grade, and we warranty them identically. The only place we insist on OEM is when the door uses Amarr’s proprietary low-headroom kit, where the drum profile is non-standard. We carry both on the truck, and the technician photographs the existing drum before quoting, per Clause 4 of The Haven Standard.
Signs Your Amarr Cable & Drum Replacement Is Failing
- Door hangs crooked in the opening. One cable has slipped or the drum has developed a flat spot, so that side of the door stops short while the other continues to travel. In Bothell’s damp climate, the drum’s cast iron can corrode at the hub bore, letting it wobble on the shaft and throw off cable tracking.
- Thumping or grinding during open/close cycles. The cable has jumped a groove and is riding the drum shoulder, or the drum itself has cracked and is flexing under load. This sound usually starts subtle and gets violent within a week.
- Visible fraying or broken strands on the cable. Amarr cables are 7×19 aircraft-grade galvanized wire, but the salt air influence off Puget Sound accelerates corrosion at the bottom loop where the cable meets the bottom fixture. We see this especially on doors facing west toward the Sammamish River valley.
- Door falls hard or won’t stay open at the top. The drum’s winding ratio has changed due to groove wear, so the spring torque doesn’t translate to proper cable take-up. The door may reverse on the opener or drift down from the open position.
- Cable is loose or coiled on the floor when the door is closed. The set screws on the drum have backed out, or the drum has spun on the shaft. This is not a cable-tightening fix; the drum surface or keyway is damaged and needs replacement.
Replacement Cost & What’s Included
| Service | Price Range |
|---|---|
| Amarr cable replacement (single) | $130-$180 |
| Amarr cable replacement (pair) | $180-$250 |
| Amarr drum replacement (single, with cable) | $160-$250 |
| Amarr drum replacement (pair, with cables) | $220-$340 |
The range depends on door height, drum type, and whether the torsion spring requires detensioning to access the drum. We quote a flat, written price before touching anything, per Clause 1 of The Haven Standard. That price includes the part, labor, lubrication of all moving components, safety cable inspection, and a documented photo record of the failed drum and installed replacement. Our 365-Day Done Right Promise covers the work. No invoice surprises; the price you agree to is the price you pay.
DIY or Call Us?
There is exactly one thing a homeowner can safely check: whether the cable has simply jumped the drum groove and can be seated back by hand with the door fully closed and the opener disconnected. Beyond that, cable and drum work involves the torsion spring system, which stores enough torque to cause serious injury or death if released improperly. We do not recommend DIY drum replacement.
The set screws on an Amarr drum require precise torque, the cable winding must match the door’s lift count exactly, and the spring tension must be rebalanced after any drum change. Our technicians carry calibrated winding bars, shaft collars, and the specific Amarr-compatible drum inventory. Name the part. Quote the range. Then fix it. If you’re in Bothell or the Canyon Park area, call (425) 696-1443 and we’ll give you a flat written estimate before scheduling.
FAQs
Amarr cables typically last 8-12 years in Bothell’s climate, drums closer to 12-15 years if the door is properly balanced. The salt air influence and temperature swings between our wet winters and dry summers accelerate corrosion at the cable loop and drum hub. Call (425) 696-1443 for an exact quote - estimates are free.
No. A frayed or kinked cable cannot be spliced or repaired to a safe standard; replacement is the only acceptable fix. We replace cables in matched pairs even if only one has failed, so door lift stays symmetrical. Call (425) 696-1443 for an exact quote - estimates are free.
Most replacements take 45-90 minutes, including door rebalancing and safety checks. We carry the common Amarr drum sizes and cable lengths on our trucks, so we don’t leave to source parts. Call (425) 696-1443 for an exact quote - estimates are free.
Yes. We stock 400-series drums in standard and high-lift profiles, plus 7×19 galvanized cables in lengths for 7-foot, 8-foot, and 10-foot doors. For Amarr’s proprietary low-headroom hardware, we verify by photo before dispatching. Call (425) 696-1443 for an exact quote - estimates are free.
Servo Garage Doors Bothell is an independent service provider, not affiliated with Amarr. We also stock parts for LiftMaster, Chamberlain, and Genie systems.
Written by Marcus Deller, Owner, Servo Garage Doors Bothell at Servo Garage Doors Bothell, serving Bothell and nearby areas.