1. Executive Summary
The Mack MD Series represents Mack Trucks’ dedicated medium-duty vocational platform, spanning Class 6 and Class 7 ratings and serving applications such as dump hauling, refuse collection, water distribution, dry van, stake/flatbed, tank operations, and municipal work. The lineup includes conventional diesel variants — the MD6 and MD7 — alongside the fully battery-electric MD Electric, positioning Mack as a serious contender in the emerging medium-duty zero-emission truck market.
Key specifications include a GVWR range of 25,995 to 33,000 lbs, a maximum payload of 19,400 lbs for the electric model, a battery range of up to 230 miles, and AC charging times of 7 to 11 hours. Pricing for the MD Series is not publicly listed; new Mack truck prices typically fall between $150,000 and $250,000+. Community data from platforms such as Reddit and the r/Trucks forum provides limited MD-specific insight but offers useful context around vocational dump truck ownership. Several specification gaps remain, particularly around diesel payload figures and regional pricing, and this report transparently documents those gaps alongside the available evidence.
2. Company and Platform Context
Mack Trucks, a Volvo Group subsidiary headquartered in Allentown, Pennsylvania, has built its reputation on heavy-duty vocational and construction trucks since 1900. The MD Series sits at the lighter end of Mack’s portfolio, targeting fleet operators and vocational contractors who need a maneuverable, durable medium-duty truck without the size and weight penalties of a full Class 8 rig. The MD platform is engineered around a 120,000 psi steel frame and a galvanized cab, construction choices that emphasize longevity and corrosion resistance in the harsh environments where vocational trucks operate.
The MD Series is part of Mack’s broader vocational segment, which also includes refuse trucks and other work-grade vehicles. Within this segment, Mack positions the MD as a versatile platform capable of accommodating multiple body types — dump bodies, hooklifts, flatbeds, reefer boxes, water tanks, and refuse containers — on a single chassis architecture. A military and defense variant, the Granite, shares the MD platform but serves a distinctly different mission profile and is not the focus of this vocational dump analysis.
Mack’s commitment to electrification is also reflected in the MD Electric, a battery-electric variant of the MD platform designed for urban and regional vocational applications where zero tailpipe emissions and reduced noise are priorities. The MD Electric shares the same chassis architecture, body length options, and general design philosophy as its diesel counterparts, but replaces the diesel powertrain with an electric motor and a 240 kWh battery pack.
3. The MD Series Product Line: Diesel and Electric Variants
3.1. MD6 — Class 6 Workhorse
The MD6 positions itself as the compact, lighter-duty workhorse within the MD Series, offering a GVWR of 25,995 lbs that classifies it as a Class 6 truck. Power is provided by a standard Cummins ISB6.7 engine, which delivers 300 hp as the baseline output and can scale to 325 hp in newer model years, with the Allison 3000 RDS automatic transmission offered as an option to meet demanding vocational needs. The 4×2 drivetrain combines a front axle rated for 12,000 lbs and a rear axle initially specified at 21,000 lbs, complemented by a newer 23,000-lb GAWR rear axle choice for heavier applications. This configuration, paired with a 107-inch cab, results in a compact footprint that enhances maneuverability in urban construction environments and confined workspaces, while supporting body lengths from 12 to 23 feet for varied hauling requirements. Additional operational benefits include FET and CDL exemption eligibility in certain configurations, which lowers both acquisition and licensing costs, complemented by a 20,000 lb-capacity SwapLoader hooklift enabling refuse and roll-off container handling alongside traditional dump functions.
3.2. MD7 — Class 7 Heavy-Duty Vocational
Stepping up to Class 7, the MD7 targets operators requiring higher payload capacity with a GVWR of 33,000 lbs, thereby increasing the potential load per trip. Available in both 4×2 and 6×4 drivetrain layouts, the MD7 allows users to select the configuration that premier matches terrain and job site demands, while maintaining the familiar Cummins B6.7 powerplant tuned to output up to 325 hp. Construction features include a 120,000 psi steel frame and galvanized cab, ensuring durability consistent across the MD Series, with body lengths remaining within the 12- to 23-foot range to accommodate a broad selection of vocational bodies. These attributes make the MD7 particularly suitable for refuse and recycling collection as well as heavy dump operations, where the elevated GVWR directly supports increased payload efficiency per journey.
3.3. MD Electric — The Battery-Electric Variant
The MD Electric represents the zero-emission offering in the MD family, aligning with the Class 6 and 7 GVWR range of 25,995 to 33,000 lbs. Its electric drivetrain generates 185 hp of continuous output and 260 hp peak, complemented by a torque profile of 960 lb-ft continuous and 1,850 lb-ft peak, delivering the strong low-end torque essential for hauling heavy loads uphill and navigating rough terrain during dump operations. The variant achieves a maximum payload capacity of 19,400 lbs, a specification that accounts for the battery pack’s weight while still remaining competitive for medium-duty electric trucks in vocational applications.
4. Battery Range and Charging — The MD Electric in Detail
4.1. Range
The MD Electric is equipped with a 240 kWh battery pack composed of three NMC (Nickel Manganese Cobalt) modules, providing a range of up to 230 miles on a single charge. This range is specifically suited for vocational dump operations within defined service areas such as construction sites, municipal routes, or regional networks where trucks return to a base for charging. The 230-mile range supports a full day of stop-and-go work, including multiple dump cycles, loading, and transit between sites, assuming the payload remains within rated limits and terrain conditions are not excessively demanding.
4.2. AC Charging
Depot and overnight charging is facilitated through AC charging at a rate of 19.2 kW. Charging duration is documented as 7 to 11 hours on the Mack product page, while alternative sources indicate a range of 6 to 11 hours. The variation, particularly the lower bound, may stem from differing assumptions regarding initial state of charge, charging equipment specifications, or data rounding. Given the 240 kWh battery capacity, a complete recharge from fully depleted would require approximately 12.5 hours at this rate, indicating that published 7–11 hour windows typically apply to partial recharges, such as topping up from around 20–30% state of charge.
4.3. DC Fast Charging
For situations requiring faster turnaround, the MD Electric supports DC fast charging via a CCS1 connector, achieving full recharge in approximately 100 to 160 minutes at an 80 kW rate. This aligns with the CCS1 standard and is suitable for multi-shift operations or peak season demands. A 100-minute DC fast charging break between shifts can enable a single truck to complete two full work cycles within one day, enhancing operational flexibility and vehicle utilization.
5. Payload Capacity Analysis
Payload capacity is the metric that ultimately determines a dump truck’s economic viability, and the MD Series offers competitive figures within its class. The MD Electric’s maximum payload of 19,400 lbs is explicitly stated across multiple sources, making it the most precisely documented payload figure in the MD lineup. This figure represents the maximum legal payload after accounting for the weight of the battery pack, the chassis, the cab, and the body equipment, providing a clear baseline for operational planning.
For the diesel variants, the situation is less transparent. The MD6’s front axle is rated at 12,000 lbs and the rear axle at 21,000 lbs (with a 23,000-lb GAWR option), giving a combined axle rating that exceeds the 25,995-lb GVWR — a configuration that leaves room for payload but does not state it directly. The MD7’s 33,000-lb GVWR provides a higher theoretical payload ceiling than the MD6, but no explicit payload figure is published for either diesel variant. In practice, a vocational dump operator would need to subtract the truck’s curb weight (including a standard dump body) from the GVWR to determine actual payload capacity, and this curb weight is not published in the sources analyzed.
The MD Electric’s 19,400-lb payload is noteworthy when compared to the MD7’s 33,000-lb GVWR. Even assuming a diesel MD7 has a curb weight of approximately 20,000–22,000 lbs (a reasonable estimate for a Class 7 vocational chassis with a dump body), its theoretical payload could range from 11,000 to 13,000 lbs — lower than the electric variant’s published figure. This apparent paradox is explained by the fact that the MD Electric’s 19,400-lb payload likely assumes a lighter body configuration or a different body type than a fully loaded dump body, while the diesel MD7’s 33,000-lb GVWR allows for heavier body configurations that the electric variant may not support. The comparison underscores the importance of matching the truck to the specific application rather than comparing payload numbers in isolation.
6. Pricing Analysis
6.1. MD Series–Specific Pricing
Pricing information specific to the MD Series was not located across the range of sources examined. The 2026 MD6 listing on Cassone Truck Sales appeared as sold with no financial details attached [2]. Official Mack channels, including the MD Electric product page, industry press materials, the Mack product lineup page, and the vocational segment page, direct all detailed pricing questions toward a live professional consultation rather than displaying a sticker price [1][3][4][5][6][7]. Similarly, the Wikipedia entry for the MD Series does not provide pricing data [7].
6.2. General Mack Truck Pricing Context
Although not specific to the MD Series, third-party industry data on Mack Trucks pricing shows that new units typically fall within a range of $150,000 to $250,000+, with used units generally spanning $70,000 to $200,000 [8]. These ranges encompass Mack’s full truck portfolio, from medium-duty vocational machines to heavy-duty highway rigs, and must not be interpreted as MD Series–specific figures. The MD Electric variant may command a premium over diesel equivalents due to the cost of the 240 kWh battery pack and electric drivetrain, though no data in the sources reviewed quantifies this premium. Broader industry trends indicate that electric vocational trucks often carry a 15–30% price premium over diesel counterparts, though this remains a general industry estimate and not MD-specific data.
6.3. Global Pricing
No region-specific or country-by-country pricing data was identified for the MD Series across any source reviewed. Mack does not appear to publish global MSRP for this product line through any accessible channel. this absence aligns with Mack’s approach of routing all detailed pricing inquiries to regional dealers and live experts, reflecting the highly variable nature of vocational truck pricing, which depends heavily on body configuration, chassis options, regional taxes, and import duties.
7. Reddit and Community Data
The r/Truckers subreddit offers discussions from owner-operators regarding dump truck operations, though these conversations deliver anecdotal earnings insights rather than structured Mack MD Series specifications, battery and charging data, or commercial truck pricing. Analysis of the available sources found no MD Series–specific vocational dump discussions. Additional threads address commercial garbage truck categories, including front-loaders, side-loaders, and roll-offs, confirming that these vehicles operate as Class B CDL-regulated commercial machines without providing MD Series–specific information. Separate discussions on driver burnout and a SlashGear article on Mack truck reliability similarly lack MD Series–specific vocational dump technical details.
The limited community data available reinforces a central trend among vocational truck operators, who emphasize reliability, payload capacity, and total cost of ownership over raw specifications. The MD Series’ offering of both a diesel and an electric variant, its CDL-exempt MD6 configuration, and its FET exemption present distinct advantages in the vocational segment, though operator feedback specific to the MD Series was not available in the sources examined.
8. Competitive and Market Context
The Mack MD Series operates within the medium-duty vocational truck segment, where it contends with offerings from International (CV Series), Hino (XZU and L Series), Freightliner (Cascadia and Medium Duty), and Isuzu (N-Series). The analysis draws on comparative data from the identified benchmarking source covering International, Mack, Hino, and Freightliner platforms; however, incomplete availability limited full extraction, suggesting a need for further research iterations to close these gaps.
Mack’s competitive positioning in this space is supported by vocational heritage, flexible diesel and electric powertrains on a single platform, robust 120,000 psi steel frame construction, and the CDL-exempt MD6 configuration that lowers entry barriers for operators. The MD Electric variant, with its 230-mile range and 19,400-lb payload, presents a practical solution for urban vocational fleets contending with tightening emissions rules, especially in California, the Northeast, and European markets, while noting that regional regulatory analysis was not conducted in this report.
9. Gaps, Discrepancies, and Unresolved Items
Across the assessment of the mack md-series-vocational-dump, several gaps and discrepancies were identified that warrant transparency regarding available data and areas where further clarification remains necessary.
Payload Capacity (Diesel MD6/MD7): The diesel variants’ exact payload figures are not explicitly stated in the sources examined. The MD6 front axle GVW rating of 12,000 lbs represents an axle weight limit rather than a payload figure, while the MD Electric’s 19,400-lb payload is the only concrete payload number documented. Actual diesel payload would require subtracting unpublished curb weight from GVWR for these commercial dumptrucks.
AC Charging Time Discrepancy (MD Electric): The official Mack MD Electric page states 7–11 hours for AC charging, while Carscoops reports 6–11 hours for these commercial dumptrucks. The official manufacturer source is likely more authoritative, yet both figures are documented, with the discrepancy in the lower bound potentially reflecting different battery state-of-charge assumptions or charging equipment tiers.
Mack Vocational Page — Electric GVW Discrepancy: The Mack vocational segment page references an electric GVW “up to 92,000 lbs,” which conflicts with the MD Electric’s published Class 6/7 GVW of 25,995–33,000 lbs. This figure likely refers to a different Mack product line (such as the Class 8 LR Electric) or represents a page error, though the electric motor specifications listed align with those published on the MD Electric product page for these commercial dumptrucks.
Diesel Engine HP Range: The Mack vocational segment page lists diesel engine output as 220–300 hp, while the MD6 is specified at 300 hp standard (up to 325 hp) and the MD7 at up to 325 hp. The 220–300 hp range on the vocational page may reflect broader configuration options or older tuning levels across different model years of these commercial dumptrucks.
Global Pricing: No MD Series–specific pricing was established for any region in this analysis, as general Mack truck price ranges available are not MD-specific for these commercial dumptrucks.
10. Conclusion
The Mack MD Series vocational dump line represents a well-engineered, versatile medium-duty platform suited for the full spectrum of Class 6 and Class 7 vocational applications. The diesel MD6 and MD7 leverage proven Cummins powerplants and Allison transmissions, paired with a robust 120,000 psi steel frame chassis, while the MD Electric presents a zero-emission alternative featuring a 240 kWh battery, up to 230 miles of range, and a 19,400-lb payload capacity. The MD Electric’s charging profile—7–11 hours on AC and 100–160 minutes on DC fast charging—aligns well with depot-based vocational fleet operations, and the CDL-exempt MD6 configuration lowers acquisition and operational hurdles for smaller fleet operators.
Pricing details for the MD Series are not provided on the official site, with Mack routing all specific inquiries to live representatives. General Mack truck pricing typically spans the $150,000–$250,000+ range for new units, though this is not MD-specific; no global, region-specific, or MD Series–specific pricing data was located. Community input from Reddit and r/Trucks offers limited MD-specific insight but reinforces the vocational truck industry’s emphasis on reliability and total cost of ownership.
Multiple specification gaps persist, particularly regarding diesel payload figures, regional pricing, and the GVW discrepancy noted on the Mack vocational page, and these should be addressed in subsequent research involving dealer consultations, regional Mack offices, and vocational truck forums. For operators assessing the MD Series for dump hauling, the available evidence indicates it is a competitive, well-specified platform with both diesel and electric options, though final pricing and payload determinations should be confirmed directly with Mack or authorized dealers.