Motor - Ametek Lamb 116210-85, 2-Stage Bypass 5.7" with Horn S12 Impact and aged plastic are

Impact and aged plastic are the usual causes

shielding the internal components from dust and debris while helping maintain the airflow the motor needs to stay cool

Brushless motors run long

Refreshing both together restores full suction and sealed HEPA-grade filtration at once

Motor - Ametek Lamb 116210-85, 2-Stage Bypass 5.7" with Horn S12 Impact and aged plastic areThis genuine Ametek Lamb bypass motor features tangential discharge with a 5. 7 inch diameter housing. Achieves up to 220 inches H2O sealed vacuum with 107 CFM airflow, making it ideal for dual motor central vacuum systems. The bottom flange is specifically engineered for series motor installations. Includes ball and sleeve bearings with fan shell stub tube (1 7 8 inch tube on base). Max speed: 18,034 RPM. Fits NuTone CV450, CV570, CV750 central