MM 701 & 890 Twin Mergers


In a Class of Its Own

With working widths of 24' and 30’, and many of the features KUHN mergers are known for, the MM 701 & MM 890 provide operators with the working power of a triple merger in the compact size of a twin.

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KUHN’s twin hay mergers provide operators with simplicity, versatility, and dependability. The KUHN MM 701 and 890 Merge Maxx® hay mergers offer 24’ and 30’ pickup widths respectively. Designed for mid-to large dairy and commercial forage operations they can merge to the left, right or 50/50 split creating even windrows for the forage harvester. The floating windguard ensures smooth and even windrows to make the forage harvester more efficient, while the crop netting improves leaf retention in the windrow. Simple and durable mechanical flotation on each head eliminates the need to engage float via the tractor's hydraulics. The IntelliMerge™ ISOBUS control system is an industry exclusive and standard on both the MM 701 and 890, improving operator ergonomics and operational efficiency.

Your benefits

Simplicity, Versatility and Adaptability


Multiple Delivery Options

The MM 701 and 890 hay mergers can merge crop to the left, right, split or with either wing in the raised position. Both models have the ability to 50/50 split leaving all windrows with an even amount of crop for better harvesting efficiency. Having the ability to raise the wings independently is particularly useful for opening up fields, merging around field obstacles or cleaning up point rows in irregularly shaped fields.

IntelliMerge™ ISOBUS Control System

The IntelliMerge™ ISOBUS control system allows the operator to run the machine, make adjustments, receive performance feedback and carry out diagnostics. Operators can tailor their machine to field and crop conditions to maximize their efficiency.

OptiSense™ Belt Stall Indicator

The OptiSense™ belt stall indicator alerts the operator when the belts start to slow down when approaching the capacity of the machine. This gives the operator a chance to react before the machine plugs. If the belts stop, the sensor will shut down the machine to avoid damage to the belts and further plugging of the machine. The conveyor direction arrow will be red to identify the stalled conveyor. This is done by monitoring the idler roller speed on each conveyor. This feature helps the operator optimize performance, keeping the machine moving across the field for improved efficiency.

Constant Float® Suspension

A simple and effective mechanical suspension system is utilized for superior flotation. This unique design, inspired by the proven KUHN trailed disc mower, eliminates complicated hydraulic requirements and the need for tractor float valve engagement, unlike other mergers in the industry. The range of suspension on each pickup is 14” (+8”, -6”).

Narrow and Simple Transport

The simple folding design allows quick transition from field to road. Transport is a narrow 10’3” (3.1 m) wide and transport height is 12’ (3.7 m). Balanced tongue weight during transport and in the field helps you maintain control at all times. Field to transport position is accomplished quickly as only one hydraulic valve per head is used for folding.

It Starts with the Pickup


High-Capacity Pickups with Integrated Frames

Commercially designed pickups treat crop gently yet are built and tested for extreme use. The central cam design with large heavy-duty sealed cam followers provide extra-long life even in the toughest conditions. KUHN high-capacity pickups are designed and built with integrated frames to improve the strength and durability of the pickups and keep the machine looking clean as there is no place for crop to catch and build up.

Floating Windguard and Standard Crop Netting

The floating windguard eliminates the need to make adjustments when merging different crops or cuttings. The simple geometry of the floating linkage means the windguard is automatically optimized for differing volumes of crop. The long, curved fingers provide excellent crop guidance onto the center of the belt for fluffy and even windrow creation.

Standard crop netting greatly limits leaf loss during transition to the belt and ultimately improves leaf incorporation in the windrow. You can adjust the netting from being fully extended to halfway or fully retracted to match your needs.

Heavy-Duty Belt Conveyors

Commercial-grade belt conveyors allow the crop to be effectively transitioned into the windrow, regardless of discharge side. The conveyor belt is self-cleaning and requires no tracking adjustments. Each conveyor has an easy-to-access splice for fast removal or replacement, if necessary due to maintenance and normal wear. 

A quick-release belt tensioning system simplifies storage and routine adjustment. Easy adjustment from one side maintains uniform pressure over the width of the belt. It is recommended to take the tension off of the belts between cuttings and during the off season.

Anti-Wrapping Discs

To minimize wrapping in long crops, such as oats or long grasses, HDPE anti-wrapping discs are installed at the ends of the pickups and rotate with the tine bars. This small improvement greatly reduces the dead space where long crop can wrap, as seen with competitive pickup style mergers.

Floating Skid Shoes

Dual wide skid shoes allow each head to rapidly adapt to rolling field conditions while maintaining very low ground pressure. Floating skid shoes are a KUHN exclusive. The pivoting action allows the pickups to float over pivot tracks and rough terrain. Additionally, the special shape and pivoting of the shoe allows for self-cleaning when lifted into headland position to eliminate crop buildup. The skid shoes are reversible on their mounts for even wear and longer life.

Less Maintenance Required


Hydraulic Controls

The MM 701 and 890 require two tractor hydraulic valves to control the raising/lowering of the heads from transport to headland or working position. The suspension system on the mergers utilizes a slotted link, so the tractor hydraulic valves do not need to be put in the float position.

 The hydraulic drive pumps oil through the main hydraulic blocks on the back of each head to run all the functions including pickup speed, belt direction, and pickup height. All of these functions are electronically controlled via an ISOBUS terminal.

Central Lubrication System

The MM 890 merger is equipped with a central lubrication system; an optional feature on the MM 701. All folding and suspension components requiring lubrication are greased from a single point. This system is not just a grease bank but will ensure the proper amount of grease is routed to each location on the machine while the operator needs to only grease a single zerk. Optionally an auto-lube system can be added to further reduce the time needed for routine maintenance.

2-Point Hitch

The specially designed 2-point hitch makes hookup quick and easy. The swiveling headstock eliminates driveline chatter and allows up to 90-degree turns. A hydraulic pump dedicated to each head is housed within the hitch. The hitch on the MM 701 is Cat. 2/3N/3 quick hitch compatible. The hitch on the MM 890 is Cat. 2/3N/3/4N quick hitch compatible.

Bearing Wear Sleeves

Exclusive in the industry, standard bearing wear sleeves maximize tine bar life by providing an easily replaceable split mounting surface. If you're merging in abrasive soils, you'll especially appreciate this feature as a wear sleeve can easily be replaced, with the tine bar installed, in under one minute.

Quick and Easy Routine Maintenance

The two-piece poly tine bar bearing greatly simplifies periodic maintenance. KUHN MM hay mergers now have a new tine bolt with fewer pieces. The specially designed bolt holds itself so only one wrench is needed to change pickup tines. The proven split bearing with wear guards and anti-wrap disc also decrease time needed for regular maintenance and improve pickup reliability.


Additional Equipment for the Twin Mergers



Working width
Number of pickups and conveyors
Individual pickup width
Conveyor length
Conveyor width
Discharge capability
Pickup windguard
Adjustable crop nets
Number of tine bars
Cam followers
Pickup height
Adjustable skid shoes
Header flotation
Header suspension travel
Self-contained hydraulic drive
Pickup speed control
Conveyor direction control
ON/OFF conveyor control without disengaging the pickup
Pickup height gauge
Belt stall detection
Transport width
Transport length
Transport height
Central lube system
PTO speed
Minimum PTO power requirement
Road lights and signaling
Required tractor electrical connections
Required tractor hydraulic connections
Approximate machine weight
MM 701 MM 890
24' (7.3 m) 30' (9 m)
2 2
12' (3.7 m) 15' (4.6 m)
11'10" (3.7 m) 14'10" (4.5 m)
3' (0.9 m) 3' (0.9 m)
Right. left, or 50/50 split Right. left, or 50/50 split
Standard Standard
Standard Standard
6 6
Sealed roller bearings Sealed roller bearings
5/8" - 3 1/8" (16 - 80 mm) 5/8" - 3 1/8" (16 - 80 mm)
Hydraulic Hydraulic
Constant Float® suspension Constant Float® suspension
14" (+8", -6") 35.6 (+20.3, -15.2) cm 14" (+8", -6") 35.6 (+20.3, -15.2) cm
2-point swivel hitch, Cat. 2, 3N and 3, quick hitch compatible 2-point swivel, Cat. 2/3N/3/4N, quick hitch compatible
Standard Standard
via ISOBUS terminal via ISOBUS terminal
via ISOBUS terminal via ISOBUS terminal
via ISOBUS terminal via ISOBUS terminal
via ISOBUS terminal via ISOBUS terminal
Optional OptiSense™ System Standard OptiSense™ System
10' (3 m) 10'3" (3.1 m) with 500/45 - 22.5 tires 10'3" (3.1 m)
24'6" (7.5 m) 28'4" (8.7 m)
12' (3.6 m) 12' (3.7 m)
Standard 16.5"L X 16.1" 10 - ply imp. tires 500/45-22.5 flotation
Optional Standard
1 3/8" - 21 spline 1 3/8" shaft - 21 spline
1,000 rpm 1,000 rpm
100 hp (75 kW) 120 hp (90 kW)
Standard Standard
1 SAE 7 pin light connection, 12V power, ISOBUS plug 1 SAE 7 pin light connection, 12V power, ISOBUS plug
2 DA; no float valve required 2 DA; no float valve required
9,800 lbs (4,445 kg) 10,700 lbs (4,855 kg)