Allison Transmissions Tackle Extreme Conditions at Mongolia ER Coal Mine
September 15,2026
In summer, temperatures in South Gobi Province can climb to 40 degrees Celsius, with heat haze off the ground distorting the distant ridgelines. In winter the same region faces extreme cold of minus 35 degrees Celsius, with snow cover lasting up to 100 days. This is the reality at Mongolia's ER coal mine, located in that southern province at an elevation of 1,300 to 1,600 meters. The eastern branch of the Gobi Altai Mountains runs through its center, with steep ranges in the north alternating with gentle hills in the south, and loose alluvial and diluvial deposits covering the rolling desert plain.
In such an environment, running mining trucks has never been easy. Roads are mostly crushed stone and dirt, deeply rutted by heavy mining trucks, and the challenge grows with long steep grades, sharp turns and slippery surfaces. Fleet managers know well that the reliability of a transmission directly shapes the production rhythm of the entire mine. In these harsh conditions, Tongli mining trucks equipped with Allison 4800 WBD fully automatic transmissions push the physical limits of heavy machinery day after day.
Powertrain reshaped on the Gobi
The company tackling this tough assignment is operator Vertex Mining Partner. To carry out high-intensity overburden stripping and ore hauling, it runs a fleet led by 60 Tongli TLD96 wide-body mining trucks powered by Weichai WP14T engines with a rated payload of 70 tons, plus a small number of Komatsu mining trucks. Before the fleet moved entirely to Allison transmissions, however, the severe operating conditions magnified every hidden weakness in the equipment.
The transmissions previously used by the fleet had a very high failure rate. Worse, Mongolia lacks a professional transmission repair network. Once a machine lost power in the dust and wind, maintenance crews could only diagnose and fix the fault themselves, sharply reducing fleet availability and utilization.
"Transmission failures were our biggest headache. There was no professional repair support in Mongolia, so we had to work it out ourselves," said Homtai Baiyar, equipment manager at Vertex Mining Partner. "We chose Allison transmissions for the new mining trucks mainly because of their low failure rate, and also because Allison has service network coverage in Mongolia. Timely repairs give us real peace of mind. In 2025 we decided to buy another 100 mining trucks with Allison as standard, based on actual operating experience."
Uninterrupted power under extreme conditions
On the Gobi's soft sand and steep gravel grades, starting under heavy load can easily cause rollback or power interruption. Allison's Continuous Power Technology addresses this problem directly. The instant the driver presses the accelerator pedal, the torque converter smoothly multiplies engine torque, letting this 70-ton-class steel giant pull away steadily. Even at full throttle, shifts come without any hesitation, and continuous stable power flows to the wheels. On descents, the transmission's constant-speed downhill function effectively prevents overspeed under heavy load. Together, these technologies lighten the driver's burden in complex operations.
A driver who has worked at the mine for years describes it this way: "Now I just hold the throttle steady and the truck picks the right gear by itself. I don't have to ride the brakes going downhill, so a full day behind the wheel is far easier. The Gobi is so dusty, but the transmission has run this long without trouble, which gives me confidence."
Routine maintenance is another worry off fleet managers' shoulders: regular filter and fluid changes, combined with scheduled predictive diagnostics to spot hidden faults, cut failure rates at the source. "The conditions at the ER mine would rank among the most extreme at any mine anywhere in the world," said Wang Wei, after-sales service manager at Tongli Heavy Industry. "The durability of the Allison 4800 WBD is outstanding and sharply reduces the fleet's downtime risk."
Comprehensive global service
If Allison's core technology keeps mining trucks running steadily and under control, its service system is the strongest backup behind every unit. Even deep in the dust-swept South Gobi, Vertex Mining Partner's maintenance team is no longer fighting alone. Through a dedicated TAC (technical assistance center) mechanism, on-site technicians and Tongli specialists can connect directly with Allison experts in the region.
This one-to-one, real-time technical support, backed by Allison's growing service network in Mongolia, has greatly shortened troubleshooting and waiting times that once stretched to several weeks. For mining companies working under extreme conditions, this kind of accessible systematic operations support is exactly what safeguards production continuity and underpins their decision to add another 100 heavy machines.
Today, drivetrains proven in extreme conditions, backed by responsive service, have become an indispensable competitive edge for Chinese mining equipment makers expanding overseas. Through every smooth start and every clean dump, Allison transmissions write a solid footnote on that global road.
Source : www.51cm.org
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