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    Chevron Delo TorqForce MP TES 781 approval: drivetrain reliability notes for mines

    February 11, 2026|

    Reviewed by Joe Ashwell

    Chevron Delo TorqForce MP TES 781 approval: drivetrain reliability notes for mines

    First reported on International Mining – News

    30 Second Briefing

    Chevron’s Delo TorqForce MP has been approved by Allison Transmission as the first, and currently only, lubricant to meet the new TES 781 specification for stationary off-highway transmissions. TES 781 targets high-load, continuous-duty services such as hydraulic fracturing and high-pressure pumping, where transmissions run at sustained torque and temperature for long intervals. For mine operators using Allison-powered fixed or skid-mounted equipment, the approval provides a defined fluid option for warranty compliance and for managing wear, varnish and unplanned downtime in severe-duty drivetrains.

    Technical Brief

    • TES 781 is targeted at stationary off-highway transmissions in fracturing, high-pressure pumping and similar duty.
    • Chevron’s Delo TorqForce MP is formulated for continuous high-load, high-temperature operating regimes.
    • Allison’s TES 781 evolution builds on earlier transmission fluid standards for durability and extended uptime.
    • Clear OEM specification simplifies maintenance procedures and fluid segregation, reducing misfill and cross-contamination hazards.
    • Similar TES-style specifications are likely to propagate to other severe-duty industrial drivetrains as OEMs codify fluid risks.

    Our Take

    Chevron appears only sporadically in our 987 Mining stories, so an Allison Transmission approval signals a push to deepen its footprint in heavy-duty mobile equipment rather than just fuels and base oils.

    Among the 1,922 tag-matched Product and Safety pieces, most focus on tyres, collision avoidance, or PPE, so drivetrain lubricants like Chevron Delo TorqForce MP occupy a relatively niche but critical reliability and fire-risk segment.

    Allison Transmission’s presence in our mining coverage is usually tied to underground and haulage fleets, so its endorsement here likely targets OEM and fleet-standardisation decisions at large contractors rather than small owner-operators.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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