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Bel-Ray Synthetic Gear Oil 680 Wins Approval for Use in Off-Highway Vehicle GE Motorized Wheel Gearbox Applications

March, 2009

Bel-Ray Company, Inc. is pleased to announce the recent approval and recommendation of Bel-Ray Synthetic Gear Oil 680 (Product No. 66960) by General Electric Transportation Systems (GE) for the lubrication of both DC and AC motorized wheel gearbox applications in off-highway haul trucks.

Bel-Ray Synthetic Gear Oil 680 is a high performance synthetic gear oil formulated for demanding mining and industrial applications. Features and benefits include:

- PAO and ester based - state-of-the-art low traction base fluids promote friction and temperature control and reduced wear for extended component life

- Anti-Wear and Extreme Pressure properties - reduces wear to maximize component useful life helping to reduce replacement parts costs and lost production time

- Controls micropitting - prevents minor tooth surface damage that can lead to catastrophic gear damage.

- Highly filterable - clean fluid promotes longer component and fluid life for reduced cost of ownership

A successful GE authorized field trial of Bel-Ray Synthetic Gear Oil 680 was performed in the motorized wheels of eight Terex Unit Rig haul trucks (16 wheel motors) at the Felix Reserves Minerva Joint Venture in Queensland, Australia. Two truck models were used in this trial - Terex MT 3700AC (200 ton payload) and Terex MT 4400AC (240 ton payload).


This successful lubricant approval field trial was for a general unlimited use in both DC and AC motorized wheels and for the product to appear as an approved lubricant in the GE Off-Highway Vehicle Gearbox Oil Guideline D50E27


Each wheel motor drives a sun pinion that turns a central sun gear and three planetary gears. The gear set is enclosed in a gearbox and lubricated with gear oil. The wheel motors were inspected before the start of this trial and then after one year (5,000 hours of operation) and two years (10,000 hours of operation).The gear oil was filtered (at 10 microns nominal) after every 1,000 hours of operation to remove particles of wear metals, sludge, dirt and contaminants.

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