All Blog Posts about ‘Service & Maintenance’

Photo of the Week: Washboarding on a Rotary Drum Tire

This article was authored by:

Jenny Seim
Technical Writer

This week’s photo highlights washboarding on a rotary drum tire. Washboarding is indicated by the vertical grooves that extend the length of the tire, and it is caused by abnormal skewing of the trunnion wheels, or trunnion wheel mis-alignment. FEECO offers a tire grinding service Continue reading →

 

Question of the Week: How do Leaf Seals Work?

This article was authored by:

Jenny Seim
Technical Writer

FEECO’s leaf seals are designed to minimize air leakage into a rotary dryer or rotary kiln. We offer both single and double leaf seals. The single leaf seal consists of a series of overlapping spring steel plates that are mounted to the housing and ride Continue reading →

 

Photo of the Week: Laser Alignment in Progress

This article was authored by:

Jenny Seim
Technical Writer

This week’s photo shows laser alignment in progress. A FEECO Aftermarket Engineer is performing the laser alignment on a rotary drum. A state-of-the-art laser tracking system uses a laser beam to measure 3D coordinates (angles and distances) along the rotary drum, which is then recorded and analyzed through Continue reading →

 

Photo of the Week: Cold Gap Inspection

This article was authored by:

Jenny Seim
Technical Writer

This week’s photo shows a combination of feeler gauges and a caliper, tools used to measure the space between the flotation blocks and inside face of the rotary drum tire, or the cold gap of the tire. The distance between the tire and flotation blocks Continue reading →

 

Photo of the Week: Girth Gear Run-Out Procedure

This article was authored by:

Jenny Seim
Technical Writer

This week’s photo highlights a girth gear run-out procedure in action. A black strap (pictured) is mounted along the gear’s teeth. A dial indicator follows the strap’s path, and measures the tip of the teeth along the strap. This procedure reveals the amount of wear Continue reading →

 

Photo of the Week: Trunnion Skewing Adjustment

This article was authored by:

Jenny Seim
Technical Writer

This week’s photo highlights a trunnion skewing adjustment in action. A dial indicator (bottom left of photo) is used to measure the movement of the trunnion wheel bearings. If the bearings are not positioned correctly, they should be adjusted. The purpose of the trunnion skewing Continue reading →

 

Photo of the Week: Refurbished Tire and Trunnion Wheel

This article was authored by:

Jenny Seim
Technical Writer

Today’s photo highlights a refurbished tire and trunnion wheel. Rotary drum tires and trunnion wheels can become worn over time, resulting in a variety of unwanted characteristics such as pitting, spalling and timing marks. If the wear is left untreated, the weight of the drum Continue reading →

 

Photo of the Week: Damaged Thrust Roller

This article was authored by:

Jenny Seim
Technical Writer

Our photo this week is a damaged thrust roller. Damage occurred because the thrust roller either stopped rotating, and the rotary drum ran hard against its left side. The thrust could also have become damaged as a result of a bearing failure; the bearing may Continue reading →

 

Photo of the Week: Damaged Rotary Drum Tire

This article was authored by:

Jenny Seim
Technical Writer

This week’s photo shows a damaged rotary drum tire. Tires can become damaged if: They are worn too thin. The mounting blocks get worn, causing excess tire creep and movement. The shell is distorted from over heating/cooling the drum. The tires are shimmed too tight. Continue reading →

 

Question of the Week: What are Ball and Tube Knocking Systems?

This article was authored by:

Jenny Seim
Technical Writer

Ball and tube knocking systems are used to combat material build-up inside of a rotary drum. Here’s how they work: tubes, which hold solid balls, are attached to the drum’s exterior. While the drum rotates, the tubes drop the balls on the drum via gravity. Continue reading →