For drill rig operators, track derailment is a frequent issue. While occasional derailment is unavoidable due to harsh working conditions, such as dirt or stones getting lodged in the tracks, frequent derailments require investigation, as they can lead to serious accidents.
So, what causes drill rig track derailment? Let’s explore the common reasons.
Main Causes of Drill Rig Track Derailment
Track derailment can result from various factors, including debris accumulation, mechanical failures, and operator errors. Below are the most common causes:
1. Faulty Tension Cylinder
A malfunctioning tension cylinder can lead to derailment. Check if the tension cylinder lacks grease or shows signs of hydraulic oil leakage.
2. Severe Track Wear
Prolonged use causes wear on track components such as track links and bushings, increasing the risk of derailment.
3. Worn Track Guards
Most modern drill rigs are equipped with track guards, which play a crucial role in preventing derailment. Inspect them regularly for wear and tear.
4. Damaged Sprocket Gears
Excessive wear on the sprocket gears can lead to track slippage. If the gears are severely worn, replacement is necessary.
5. Faulty Carrier Rollers
Leaking seals on carrier rollers can accelerate wear, eventually causing the track to derail.
6. Damaged Idler Wheels
Inspect idler wheels for missing or broken bolts and check if the wheel grooves are deformed.
How to Prevent Track Derailment?
Follow these best practices to minimize the risk of track derailment:
-
Position the Travel Motor Correctly
-
When moving on-site, keep the travel motor at the rear to reduce pressure on the carrier rollers.
-
-
Limit Continuous Travel Time
-
Avoid operating the rig continuously for more than two hours. Take short breaks if extended travel is necessary.
-
-
Avoid Hard Obstacles
-
Steer clear of sharp or protruding objects that could stress the track links.
-
-
Adjust Track Tension Properly
-
Keep tracks tighter on soft ground (e.g., mud) and looser on rocky terrain. Over-tightening accelerates wear, while excessive looseness increases derailment risk.
-
-
Remove Debris Regularly
-
Clear out rocks and other debris trapped in the tracks.
-
-
Clean Tracks in Muddy Conditions
-
Spin the tracks periodically to remove accumulated mud.
-
-
Inspect Track Guards and Idler Wheels
-
Regularly check the track guards and the welded plates beneath the idler wheels for damage.
-
By understanding these causes and implementing preventive measures, drill rig operators can reduce downtime and enhance worksite safety. Proper maintenance and cautious operation are key to avoiding costly track derailments.
