Mining parts

8200 gear case upgrade

Designed for a cost-effective gear case solution

The OEM hoist and drag gear cases on the Marion 8200 are fabricated from plate steel reinforced by thin section stiffener plates, fillet welded to the main case walls. With the natural flexing of the rotating frame, this gear case can also flex and cause pinion/gear misalignment that may compromise the life of the gearing and result in reduced reliability and availability. Flexing may also result in fatigue and cracking of stiffener plates, as well as oils leaks around the pinion bearings and case lip parting faces. 

Are you looking for a cost-effective gear case solution? This case has 100 mm (4 in) side walls and base plates to minimize flexing during operation. The case also incorporates extensive use of full penetration welds and weld grinding. This innovative design provides:  

• Maintenance of good pinion/gear alignment  
• Elimination of stiffener plate cracking  
• Improved fatigue performance
• Double oil seal retainers and O-ring seal on the lid minimize oil leakage