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D11R Bulldozer Cylinders

Challenge

Issue

One of the largest coal mines in the world was experiencing premature failures of the tilt and lift cylinders used on their Caterpillar® D11R bulldozer.

The OEM seals began to leak prematurely after an average of only 2,000 hours, requiring unplanned maintenance and costly downtime.

The goal was operate 24/7/365 and exceed the operational warranty period of 4,000 hours prior to any maintenance on the equipment.

Caterpillar® D11R in operation

Caterpillar® D11R in operation – lift and tilt cylinders.

 

Solution

Products

  • Chesterton’s local specialist recommended custom kits for evaluation, both the tilt and lift cylinders (4 in total). All seals were made from our exclusive high-temperature AWC 860 material
  • The sealing solution included Chesterton® 21K canned, wiper, 22KE rod seal, 22KNBN buffer seal, 22KE O-ring replacement, 2-piece cap seal, and replaceable wear and bearing rings
  • AWC 860 proprietary polymer offers best-in class sealing technology, capable of use up to 120° C (250° F)
Custom kits developed specifically for the tilt and lift cylinders of the Caterpillar® D11R

Custom kits developed specifically for the tilt and lift cylinders of the Caterpillar® D11R.

 

Results

Improved Performance & Reliability

Chesterton’s custom seal kits were installed, far exceeding the warranty period of 4,000 hours and were not replaced until 9,000 hours of continuous operation.

This performance surpassed customer expectations and, as a result, the mine specified these kits for all cylinder upgrades on Caterpillar® D11R equipment in the future.

MTBR increased: 4x+

Caterpillar® D11R equipment performing leak free in operation

Caterpillar® D11R equipment performing leak free in operation.

 

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