Question 1

What engine and transmission does this 2018 Mack GU713 have?

Accepted Answer

The 2018 Mack GU713 typically comes equipped with a Mack MP7 or MP8 diesel engine. The MP8 is a 12.8-liter engine producing between 405-505 horsepower depending on configuration. These trucks commonly feature either Mack mDRIVE automated manual transmissions (12-14 speeds) or Eaton Fuller manual transmissions (8-18 speeds). The specific engine and transmission details for this unit can be confirmed with the seller at 434-202-4864.

Question 2

What is the GVWR and axle configuration?

Accepted Answer

This truck has a GVWR (Gross Vehicle Weight Rating) of 95,500 lbs. The axle configuration includes: Front axle rated at 20,000 lbs, three intermediate axles (one at 8,000 lbs each, totaling 24,000 lbs, plus two at 19,000 lbs each, totaling 38,000 lbs), and a rear axle at 13,500 lbs. This multi-axle setup meets Federal Bridge and Highway Regulations for legal road travel across the United States.

Question 3

What are the specifications of the Zimmerman volumetric mixer?

Accepted Answer

This unit features a 9-yard capacity Zimmerman volumetric mixer with high-flow capability producing up to 30 cubic yards per hour. Zimmerman mixers use a patented dual-chain material feed system for accurate proportioning of sand, stone, and cement. The mixer includes separate compartments for aggregates, a cement bin with power agitator, and a 500-gallon water tank. It features a telescopic extendable chute for versatile concrete placement.

Question 4

How much concrete can this unit produce per hour?

Accepted Answer

The Zimmerman high-flow mixer on this truck produces up to 30 cubic yards of concrete per hour. This production rate is ideal for medium-sized commercial jobs, residential projects, and municipal work. The volumetric mixing process allows for continuous production as long as materials are loaded, making it efficient for jobs requiring multiple pours or varying mix designs throughout the day.

Question 5

What is the actual capacity and how does it compare to ready-mix trucks?

Accepted Answer

The 9-yard mixer capacity means the truck can carry enough raw materials to produce 9 cubic yards of concrete before needing to reload. Unlike traditional barrel mixers that must return to the plant when empty, volumetric mixers produce concrete on-site from separate compartments of sand, stone, cement, and water. This provides flexibility to adjust mix designs and eliminates waste from unused concrete.

Question 6

What is the current mileage and overall condition?

Accepted Answer

The listing indicates mileage between 120,000 and 125,000 miles for these units (noting there may be two similar trucks available). The trucks received new chains and tracks in 2024, which are critical wear components on volumetric mixers. The seller can provide detailed service records, additional photos, and video documentation of the specific unit's condition upon request.

Question 7

What types of concrete work is this equipment best suited for?

Accepted Answer

This volumetric mixer truck excels at residential concrete work (driveways, patios, sidewalks), small to medium commercial projects, municipal repair work, remote location pours, and any jobs requiring multiple mix designs or small quantities. The ability to produce concrete on-site makes it perfect for jobs where traditional ready-mix access is limited or where exact quantities prevent waste.

Question 8

What is the flowable fill option mentioned in the listing?

Accepted Answer

Flowable fill (also called controlled low-strength material or CLSM) is a self-leveling, flowable concrete mixture used primarily for backfill, void filling, and utility trenches. The flowable fill option on this Zimmerman mixer allows the operator to produce this specialized material by adjusting the mix proportions. This capability expands revenue opportunities beyond traditional concrete work into excavation support, pipe bedding, and abandoned structure filling.

Question 9

Can this mixer produce different concrete strengths on the same job?

Accepted Answer

Yes, this is one of the primary advantages of volumetric mixing. The operator can adjust the material feed rates to change mix designs instantly. You can pour a 3,000 PSI sidewalk mix, then immediately switch to 4,000 PSI structural mix without returning to a plant. This flexibility is impossible with barrel mixer trucks that carry pre-batched concrete at a single strength.

Question 10

What maintenance was recently performed?

Accepted Answer

The listing specifically mentions that new chains and tracks were installed in 2024. These are critical components of the volumetric mixer's material feed system, representing significant maintenance investment. The Zimmerman patented dual-chain system is designed for long life, but chains eventually wear from constant material abrasion. This recent replacement means the buyer gets the benefit of fresh wear components.

Question 11

What are the ongoing maintenance requirements for a volumetric mixer?

Accepted Answer

Regular maintenance includes daily cleaning of the mixing auger and material feed system, weekly inspection of chain tension and wear, monthly lubrication of moving parts, and quarterly calibration checks to ensure accurate material proportioning. The 500-gallon water tank should be drained and cleaned periodically. Zimmerman provides comprehensive operator training and offers parts through their ZIPS (Zimmerman Interactive Parts System) online ordering system.

Question 12

Where can I get parts and service for Zimmerman equipment?

Accepted Answer

Zimmerman Industries, based in Ephrata, Pennsylvania, maintains a fully stocked parts inventory with rapid shipping. As the original manufacturer since 1962, they provide direct technical support without third-party intermediaries. All Zim-Mixers come with access to ZIPS (Zimmerman Interactive Parts System) for online parts ordering, digital manuals, and technical information. Many truck maintenance items follow standard Mack procedures through Mack dealers.

Question 13

Does this truck require special licensing or permits?

Accepted Answer

Operating this truck requires a Commercial Driver's License (CDL) due to the GVWR of 95,500 lbs exceeding the 26,001 lb threshold. Some states may require additional endorsements. The multi-axle configuration meets Federal Bridge Law requirements, so no special overweight permits are needed for normal operation. However, operators should verify their state's specific CDL requirements and any local weight restrictions on certain roads.

Question 14

Can this unit be transported or does it need to be driven?

Accepted Answer

This is a fully operational, road-legal truck that can be driven to its new location. The seller is located in Virginia, and the buyer can either arrange for a driver with appropriate CDL licensing or hire a professional truck transport service. Given the mileage (120,000-125,000 miles), the truck is suitable for long-distance driving. The seller may be able to recommend transport options or delivery services.

Question 15

What materials can this mixer handle and are there any limitations?

Accepted Answer

This Zimmerman mixer handles standard concrete materials: Portland cement, sand, various stone aggregates, water, and liquid admixtures. The flowable fill option expands capabilities to include CLSM mixes. The patented dual-chain feed system allows running any material individually, meaning you can dispense just sand or stone when needed. However, the mixer is designed for materials within typical concrete industry specifications—extremely large aggregates (over 1.5 inches) or specialty materials may have limitations. The cement agitator prevents cement from caking in the bin during transport and storage.

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Zimmerman Volumetric Mixer on 2018 Mack GU713

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FAQ

What are the specifications of this 9-yard Zimmerman volumetric mixer? +

How does Zimmerman's patented dual-chain feed system work? +

How much concrete can this high-flow Zimmerman mixer produce per hour? +

What is the flowable fill option and how does it expand revenue opportunities? +

What is the actual capacity and how does it compare to ready-mix trucks? +

Can this Zimmerman volumetric mixer produce different concrete strengths on the same job? +

What types of concrete work is this equipment best suited for? +

How does the 500-gallon water tank capacity compare to job requirements? +

What makes the telescopic extendable chute beneficial for concrete placement? +

Why is the Mack GU713 a preferred chassis for this volumetric concrete mixer? +

What are the ongoing maintenance requirements for the ZImmerman volumetric mixer? +

What engine and transmission does this 2018 Mack GU713 have and how does it support mixer operations? +

How does the 95,500 lb GVWR and multi-axle configuration benefit volumetric mixer performance? +

What is the expected service life and durability of the Mack GU713 chassis? +

What are typical fuel economy and operating costs for this truck/mixer combination? +

What maintenance was recently performed and what are ongoing requirements for both mixer and truck? +

What is the current mileage and overall condition of this unit? +

Can I get parts/service for this Zimmerman volumetric mixer? +

My business has used concrete equipment to sell. How much does it cost to advertise on ConcreteIron.com? +