Drum Belt, Drive Belt, Dryer Belt, Rubber Belt, Cylinder Belt, Transmission Belt

D511255P, 511255P, 435P3, 510178, 511255, 59174, D511255, AP6285392, PS12195395, EAP12195395

Speed Queen, Amana, Alliance, Frigidaire, Electrolux

Speed QueenADE3SRGS171TW01, ADE3SRGS173TW01, ADE3SRGS175TW01, ADE4BRGS171TW01, ADE4BRGS173TW01, ADE4BRGS175TW01, ADE5DRGS171TW01, ADE5DRGS173TW01, ADE5DRGS175TW01, ADG3SRGS171TW01, ADG3SRGS173TW01, ADG3SRGS175TW01, ADG4BRGS171TW01, ADG4BRGS173TW01, ADG4BRGS175TW01, ADG5DRGS171TW01, ADG5DRGS173TW01, ADG5DRGS175TW01, LDE30RGS113TW01, LDE30RGS115TW01, LDE37RGS113TW01, LDE37RGS115TW01, LDG30RGS113TW01, LDG30RGS115TW01, LDG37RGS113TW01, LDG37RGS115TW01AmanaNDE3800AYW, NDE4600YQ1, NDE5800AYW, NDE7800AYW, NDG3800AYW, NDG4600YQ1, NDG5800AYW, NDG7800AYW

Professional Repair Time: 60-90 minutes
DIY Repair Time: 90-120 minutes
Difficulty Rating: Moderate (3/5) — Requires unplugging dryer, removing top and front panels, disconnecting console/control panel, removing lint screen housing, removing old belt, inspecting motor pulley and drum bearing, routing new belt correctly, verifying tension, reassembling panels, testing operation

CRITICAL SAFETY WARNING: This repair involves working with internal dryer components and the dryer drum. Always unplug the dryer from the electrical outlet before beginning work to prevent electrical shock and accidental drum rotation. If uncomfortable with this repair, hire a qualified appliance technician. IMPORTANT: Have towels ready to catch any lint or debris that may fall during disassembly.TOOLS REQUIRED: Phillips screwdriver, flathead screwdriver, nut driver or socket set (typically 1/4-inch or 5/16-inch), needle-nose pliers, flashlight, work gloves, towels, belt routing diagram (consult your dryer's service manual).IMPORTANT: This is a 99-inch long belt with 5 ribs. Verify your dryer model uses this belt length and rib configuration before ordering. Incorrect belt length or rib configuration will not fit properly.

1. Unplug the dryer from the electrical outlet to ensure complete power disconnection. CRITICAL: Never work on the dryer while it's plugged in.
2. Locate the dryer drum drive belt. On most Speed Queen/Amana dryers, the belt is located inside the dryer cabinet, wrapping around the drum and motor pulley.
3. Remove the dryer top panel by locating and removing screws at the front corners or sides. Most dryers require removing 2-4 screws. Consult your dryer's service manual for specific removal instructions.
4. Carefully lift the top panel to expose the interior components. Caution: The panel may be heavy—have an assistant help if needed.
5. Remove the dryer console or control panel (depending on model) by removing screws and carefully disconnecting any wire harnesses. Consult your dryer's service manual for specific removal instructions.
6. Remove the lint screen and lint screen housing by pulling the screen out and removing any mounting screws securing the housing.
7. Remove the dryer front panel by locating and removing screws securing the panel to the cabinet. Most dryers require removing 6-10 screws. Consult your dryer's service manual for specific removal instructions.
8. Carefully pull the front panel away from the cabinet to expose the drum and internal components. Caution: The panel may be heavy and have wire harnesses attached—disconnect carefully.
9. Take multiple photos of the drive belt routing, drum position, motor pulley location, and component positions before disassembly. CRITICAL: Belt routing must be exact for proper reassembly and safe operation.
10. Take detailed close-up photos of: the belt routing around the drum and motor pulley; the motor pulley position; the belt condition.
11. Locate the motor pulley (typically located near the bottom of the dryer cabinet). The motor pulley is connected to the motor shaft.
12. Release tension on the belt by pushing the motor forward or releasing the tension mechanism (depending on model). This allows the belt to be removed from the drum and motor pulley.
13. Carefully remove the old drive belt from around the drum and motor pulley. Caution: The belt may be stuck or tight—gently wiggle and pull to remove it.
14. Inspect the old belt for damage indicators: fraying or shredding (mechanical wear, most common), cracks or chunks missing (impact damage or wear), discoloration or burning (friction or overheating), or thin spots (advanced wear). This confirms the diagnosis.
15. Inspect the motor pulley for wear or damage. If the pulley is worn, cracked, or has damaged grooves, it should be replaced. A worn motor pulley causes belt slipping and premature failure.
16. Inspect the drum bearing or idler for wear or damage. If the bearing is worn, the drum will have increased friction, causing belt wear and failure.
17. Inspect the drum for damage or debris. Clean the drum interior thoroughly.
18. Unpack the new D511255P drive belt from its packaging.
19. Compare the new belt to the old one to verify length (99 inches), rib configuration (5 ribs), and overall design match.
20. Inspect the new belt for any shipping damage before installation. The belt should be intact, with no cracks, fraying, or damage.
21. Position the new drive belt around the drum, starting at the bottom and wrapping around the outside of the drum. Important: The belt routing must match your detailed photos exactly. Incorrect routing causes belt slipping and premature failure.
22. Route the belt around the motor pulley according to your detailed photos and the belt routing diagram from your dryer's service manual.
23. Verify the belt is properly routed around the motor pulley and the drum according to your detailed photos and service manual.
24. Apply tension to the belt by pushing the motor back or engaging the tension mechanism (depending on model). The belt should be tight but not overly tight. Caution: Over-tightening causes excessive belt wear and premature failure.
25. Verify the belt is properly tensioned by checking that it doesn't slip when the drum is rotated by hand. The belt should grip the drum and motor pulley firmly.
26. Manually rotate the dryer drum by hand to verify it spins smoothly without grinding, squeaking, or resistance. The drum should rotate easily with minimal friction.
27. Verify the belt is not rubbing on any other components and is properly routed according to your detailed photos.
28. Reinstall the dryer front panel by positioning it and securing with screws.
29. Reinstall the lint screen and lint screen housing by inserting the screen and securing the housing with screws.
30. Reinstall the dryer console or control panel by reconnecting wire harnesses and securing with screws.
31. Reinstall the dryer top panel by positioning it and securing with screws.
32. Restore electrical power by plugging in the dryer.
33. Run a test cycle to verify proper drive belt operation:Set the dryer to a short drying cycle with no loadListen for smooth, quiet operation—should not hear squeaking, squealing, thumping, or grindingAfter 1-2 minutes, verify the drum rotates smoothly and consistentlyMonitor the cycle—the drum should rotate at consistent speed without wobbling or slipping
34. Check for any unusual sounds during the test cycle. Should not hear squeaking, squealing, thumping, grinding, or other noise.
35. Run a full drying cycle with a small load of towels to verify proper operation over an extended period.
36. Monitor for proper performance during the full cycle: smooth, quiet drum rotation, no unusual sounds, consistent drying performance, and no drum wobbling or slipping.
37. If the drum rotates smoothly with quiet operation and consistent performance, the repair is complete.

Safety Notes: Always unplug the dryer before working on internal components. Verify belt routing matches your service manual exactly before reassembly. Verify motor pulley is functioning properly and apply proper tension. Manually rotate the drum to verify smooth operation before restoring power. Test operation thoroughly before considering the repair complete. This repair requires moderate mechanical skills and typically takes 60-90 minutes for a qualified technician. If uncomfortable working with dryer internal components, hire a professional appliance technician.

1. The D511255P is a 99-inch long belt with 5 ribs designed for specific Speed Queen/Amana/Alliance dryer models—always verify your dryer model uses this exact belt length and rib configuration before ordering. Speed Queen/Amana manufactures dryers with different belt lengths (typically 99", 94", 91", or other lengths) and rib configurations (typically 3-rib, 4-rib, 5-rib, or flat). Installing the wrong belt length or rib configuration causes improper drum rotation, belt slipping, or complete failure. Always verify your dryer model's belt length and rib configuration before ordering. The D511255P is 99 inches long with 5 ribs. If your dryer requires a different length or rib count, order the correct belt.
2. Before replacing the dryer drive belt, always verify the motor pulley and drum bearing are functioning properly—worn pulleys or bearings are often misdiagnosed as failed belts. The motor pulley drives the belt, and the drum bearing supports the drum. If the motor pulley is worn or has damaged grooves, it cannot grip the belt properly, causing belt slipping and premature failure. If the drum bearing is worn, the drum will have increased friction, causing belt wear and failure. Before replacing the belt, inspect the motor pulley for wear or damage. Inspect the drum bearing by rotating the drum by hand—it should spin freely with minimal resistance. If the pulley or bearing is worn or damaged, it should be replaced.
3. Incorrect belt routing is a common cause of belt failure—the belt must route around the drum and motor pulley in the exact sequence specified in your dryer's service manual. Incorrect routing causes belt slipping, misalignment, and premature failure. Before installing the new belt, consult your dryer's service manual for the exact belt routing diagram. Take detailed photos of the old belt routing before removal. Match your new belt routing exactly to the old routing and the service manual diagram.
4. The drive belt should be inspected for wear or damage before replacement to confirm it has failed. Worn belts typically show fraying, shredding, or thin spots on the belt surface. Damaged belts may have cracks, chunks missing, or discoloration. If the belt shows visible wear or damage, it should be replaced. If the belt appears undamaged but the dryer is not rotating, the problem may be elsewhere (motor pulley, motor, or drum bearing).
5. Improper belt tension causes belt slipping and premature failure—the belt must be tight enough to grip the drum and motor pulley but not so tight that it causes excessive wear. The motor tension mechanism maintains belt tension. If the tension is too loose, the belt will slip. If the tension is too tight, the belt will wear excessively. After installing the new belt, verify proper tension by checking that the belt doesn't slip when the drum is rotated by hand. The belt should grip the drum and motor pulley firmly but not require excessive force to rotate.
6. The drive belt operates through mechanical friction—the belt grips the drum and motor pulley and transmits rotational force from the motor to the drum. When the motor rotates the motor pulley, the belt rotates around the pulley. The belt's grip on the drum causes the drum to rotate. Over time, the rubber compound in the belt degrades from friction and heat, causing the belt to thin, fray, and eventually break.
7. If the new drive belt fails prematurely (within weeks or months), the cause is typically: worn or damaged motor pulley, worn drum bearing, incorrect belt routing, improper belt tension, or defective replacement belt. Verify the motor pulley is functioning properly by inspecting for wear or damage and verifying the grooves are intact. Inspect the drum bearing by rotating the drum by hand—it should spin freely with minimal resistance. Verify the belt routing matches your service manual exactly. Verify the belt tension is proper—not too loose or too tight. If everything else is correct, the replacement belt may be defective—contact the supplier for a replacement or refund.
8. Physical damage to the drive belt from foreign objects in the dryer is a common cause of belt failure. If a coin, button, or other object gets caught between the belt and drum, it can damage the belt, causing cracks or chunks to break off. Always inspect the dryer drum and interior for foreign objects before installing the new belt. Remove any debris or objects found. To prevent future damage, instruct customers to check pockets before washing clothes and to use a mesh laundry bag for small items.
9. The drive belt length and rib configuration are critical for proper drum rotation and smooth operation—do not use belts with different dimensions than the originals. Using a belt with incorrect length causes improper routing and belt slipping. Using a belt with incorrect rib configuration causes poor pulley grip and slipping. Always verify the new belt matches the old one in length, rib count, and overall design before installation.
10. Proper belt routing is critical for stable drum support and safe operation—incorrect routing causes belt slipping, misalignment, and premature failure. The belt must route around the drum and motor pulley in the exact sequence specified in your dryer's service manual. Incorrect routing causes the belt to slip off or misalign, leading to complete failure. Always consult your service manual for the exact routing diagram before installing the new belt.
11. After replacing the drive belt, manually rotate the dryer drum by hand to verify smooth operation before restoring power. The drum should rotate smoothly and easily without grinding, squeaking, or resistance. If the drum is difficult to rotate or makes noise, verify the belt is properly routed and tensioned. If the drum still doesn't rotate smoothly, the motor pulley or drum bearing may be damaged and should be inspected.
12. The drive belt lifespan is typically 5-10 years with average use, but can be shortened by motor pulley wear, drum bearing wear, incorrect belt tension, improper routing, or excessive use. Factors that shorten belt life include: worn motor pulley (reduces belt grip, causes slipping and wear), worn drum bearing (increases friction, causes belt wear), improper belt tension (too tight causes excessive wear, too loose causes slipping), incorrect belt routing (causes misalignment and wear), frequent use (more belt run time), and high heat settings (thermal stress on rubber). To extend belt life, maintain the motor pulley and drum bearing, verify proper belt tension, ensure correct belt routing, and avoid overloading the dryer.

• Dryer drum not rotating (belt broken or slipped off)
• Loud squeaking or squealing noise from dryer (belt slipping or fraying)
• Loud thumping or banging noise from dryer (belt misaligned or slipping)
• Dryer running but clothes not drying (drum not rotating)
• Visible wear or fraying on belt surface (mechanical wear)
• Burning smell from dryer (belt friction or overheating)
• Complete dryer failure (belt broken, motor cannot rotate)
• Drum wobbling during rotation (belt slipping or misaligned)
• Intermittent drum rotation (belt slipping intermittently)
• Dryer takes longer to dry clothes (belt slipping, reduced drum rotation)
• Belt visible through dryer cabinet (belt slipped off or broken)
• Excessive vibration during drying cycle (belt misalignment or slipping)