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Mine Safety and Health Administration MSHA's Accident Prevention Program
Miner's Tip

Mowboard/Moldboard Repairs

Safety Something YOU can live with!
Mine Type: All Surface
Category: Maintenance
When cutting bolts out of mowboards (also called a moldboard) on scrapers, dozers, blades or rubber tired dozers (RTD's*) be sure to stand to the side of the bolt. The pressure from the dirt that is built up between the mowboard and the cutting edge can shoot the bolt out like a bullet. Make sure the area is clear of foot traffic. Be aware of your surroundings when in the process of cutting these bolts free.

*Rubber Tired Dozer

Photo of Mowboard on Dozer Drawing of Man Welding Mowboard
Reissued: 04/30/2002
Tag # AP2002-M034

MSHA extends a thank you and a tip of the hardhat to
Greg Kinneberg of Glenrock, WY,
a winner of a limited edition sticker and patch.
If you have a tip you would like to pass on, you can e-mail it to If your Miner's tip is selected, you will receive credit in this space.