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John Deere 7700A PrecisionCut™ Fairway Mower

Model Photo

7700A

  • TechControl™ Display locks in performance, and uptime
  • Set mowing turn speed to reduce scuffing
  • AutoPedal™ lowers fuel consumption and noise
  • Final Tier 4 without sacrificing horsepower

 

Features

QA7 electric reel drive system meets customer needs for reduced hydraulic leaks, sound levels, and fuel consumption

QA7 electric reel motor QA7 electric reel motor

The electric reel design meets the largest customer needs:

 

  • Eliminating 90% of the chances of an unsightly, damaging hydraulic leak by removing 150 leak points from the reel drive circuit
  • Fuel Savings of up to 30% on the 7700A E-Cut™ Hybrid, and 21% on the 6700A E-Cut Hybrid, by mowing at reduced throttle minimizes operating costs
  • Sound level reduction of up to 3dB(A) when mowing at reduced throttle opens up the operating window by being more friendly to neighbors

56-Volt, 240 amp Smart alternator and electric reel motors provide power for mowing, verticutting, and scalping

Smart Alternator Smart Alternator

An innovative 56-volt, 240-amp alternator provides plenty of power for mowing, as well as more rigorous applications of scalping for overseeding and verticutting up to 1/4” (6.35 mm) deep.

 

  • Belt driven from the engine, meaning no additional batteries required and less maintenance
  • Integrates with LoadMatch™ by sensing load on the mowing system, and slowing traction speed to maintain cut quality when heavy loads are encountered

To handle the toughest loads that often come with Quick-Adjust 7 (QA7) applications, the reel motors have been updated compared to the QA7 design.  The QA7 motors feature longer cooling fins for optimal cooling, and a larger internal bearing design.

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QA7 Electric Reel Motor

TechControl display maximizes performance and uptime by allowing more control in operation and diagnostics

TechControl display TechControl display
Password-protected settings Password-protected settings
More control with the TechControl display with a large easy-to-read screen

Passcode-protected TechControl display enables quickly setting or changing mowing speed, turning speed, or transport speed to limit variations in performance by different operators.

Mow setting screen Mow setting screen

Quickly adjust the mow or transport speed to make sure mow speed is what is needed for the changing conditions. The setting can be adjusted precisely using a speedometer app on a smartphone or global positioning system (GPS) device.

Turn-speed setting screen Turn-speed setting screen

Use the TechControl to slow the machine during turns while mowing and protect against turf scuffing and aggressive turning operators.

 

The turn speed control engages when in mow and the cutting units are lifted for turns. Once the turn is made and the cutting units are lowered, the machine speed returns to the set mow speed.

 

The turn speed is a percentage of mow speed. When set to 100 percent, turn speed control is off or allows 100 percent of the mow speed in turns. Turn speed setting of 50 percent allows only 50 percent of the set mow speed to be reached during turns.

 

Here is an example:

Mow speed = 9.66 km/h (6 mph)
Turn speed set at 50 percent
Maximum turning speed will be 4.83 km/h (3 mph)

Input/output screen Input/output screen
Service timers screen Service timers screen

The A-model PrecisionCut™ Mowers, E-Cut™ Hybrid Mowers, and TerrainCut™ Mowers have the latest in advanced diagnostics through the TechControl display. Most all diagnostics are performed while sitting in the operator’s seat.

 

The TechControl has onboard visual diagnostics allowing quick and easy machine diagnostics, maximizing up time. The system allows technician to see inputs and outputs of the electrical system.  Also, the technician can see stored controller codes on the machine to aide in troubleshooting incidents that may have occurred while on the course.

 

The TechControl will also display the notification for maintenance of the hydraulic and engine oils using service timers to notify when it has reached the time to perform the required service.

Language settings Language settings
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Choose from a list of several languages to use for the TechControl.

 

Operator warning notifications are incorporated into the TechControl and will alert the operator if a problem arises during operation.

 

 

Description

Hydraulic over temp

Hydraulic oil filter restriction

Engine oil pressure low

Engine coolant temperature

Reel motor

Battery voltage

AutoPedal™ feature lowers sound levels and fuel consumption during transport

AutoPedal AutoPedal
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The AutoPedal feature controls engine rpm and transport speed of the machine through the eHydro™ foot pedal controls. AutoPedal is similar to an automobile gas pedal operation; the more the forward pedal is pressed, the faster the machine moves and the higher the engine rpm; pressing the pedal less, the slower the machine moves and the lower the engine rpm.

 

On conventional machines, the engine rpm is controlled by the operator by means of a manual or electric/manual throttle. Operators are trained to always operate the engine at wide-open throttle. Running at wide open throttle means running the engine at its fastest speed, which increases the sound levels and fuel usage.

 

The AutoPedal system allows the engine to only run as fast as needed, meaning that as operators transport around the course, the engine speed is only as fast as needed for the transport speed. If the operator approaches play and stops, the engine rpm goes to idle. This makes transporting quieter and since the engine does not run full speed all the time, it reduces fuel consumption.

 

Once the operator reaches the mowing site, engages the mow switch on the CommandARM™ controls, the engine rpm automatically increases to full throttle for mowing.

eHydro™ hydrostatic pump and large-capacity wheel motors for serious hill-climbing capabilities

Large wheel motors Large wheel motors
eHydro™ eHydro™

The eHydro™ traction pump and wheel motors in the new A-model takes performance, traction, and operation to the next level.

 

We designed the new system to take on the most challenging course conditions. These improvements to the traction system makes the A-models ideal for undulating terrain providing superior performance and traction out on the course.

 

The traction system in the A-models is driven by a servo-controlled hydrostatic pump. The control of the pump is no longer mechanical linkages but instead it is electronic.

 

In total approximately 94 parts have been eliminated from the traction drive system along with 4 adjustments compared to prior models. The design reduced the complexity of the drive system meaning no more linkages to adjust or repair decreased routine maintenance and providing reliable day-in/day-out operation.

Forward/reverse pedals Forward/reverse pedals
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The operator will like the eHydro, too. The pedal effort has been reduced, thus reducing the foot fatigue during many hours of mowing.

LoadMatch™ electronic setting compensates speed of machine to keep power to the cutting units to maintain cut quality

LoadMatch setting LoadMatch setting

LoadMatch is an electronic setting through the TechControl display that allows managers more control of the machine and how it is operated when out on the course.

 

Most operators will mow as fast as the mow setting will allow, keeping their traction pedal all the way down. However, in some conditions this can lead to poor cut quality.

 

One example is getting behind in mowing due to weather conditions. The grass is long and lush and to properly cut that amount of grass at one time, the operator should slow the traction speed. This allows the cutting units to maintain proper turning speed, process the grass, and properly cut in one pass. Not slowing down causes missed grass and an uneven appearance. This affects the after-cut appearance and also reduces productivity by having to mow a second time to properly cut the lush grass.

 

The LoadMatch feature compensates the traction speed of machine to keep power to the cutting units. In the long, lush conditions described above with LoadMatch engaged, the operator would still have the traction pedal all the way down, but the machine would sense the load and slow the traction speed to properly cut the mowing pass. Once the load is reduced, the machine will return to the normal mow speed.

 

LoadMatch puts the manager in control of cut quality instead of the operator.

Key Specs

Maximum rated horsepower At 2800 rpm ISOC: 31 kW
At 2800 rpm ISOC: 41.6 hp
Drive pump Tandem gear pump
Ground pressure 69 kPa
10 psi
Throttle Automatic controls with AutoPedal foot controls; manual control through TechControl display
Operator display TechControl Display: Located on Command Arm; displays machine warnings, on-board electrical diagnostics; service timers on large easy to read screen; quick on the go settings for mow and transport speed; Turn Speed; Loadmatch™ and ON/OFF Cruise Control Use selection: all settings are pass code protected
Mowing speed 0-12.8 km/h
0-8.0 mph
Cutting unit size Quick Adjust QA7: 55.9 cm
22 in.
Total width of cut 254 cm
100 in.
Reel diameter 17.8 cm
7 in.
Frequency of clip (FOC Reels) OR Blade tip speed (decks) 10 Blade: 1.06 mm/km/h
10 Blade: 0.067 in./mph
8 Blade: 1.33 mm/km/h
8 Blade: 0.084 in./mph

Engine

Type Direct Inject Turbocharged Diesel
Compliant emission regulation United States and Canada Tier 4
Horsepower Maximum rated horsepower
At 2800 rpm ISOC: 31 kW
At 2800 rpm ISOC: 41.6 hp
Cylinders Three
Displacement 1.568 L
95.69 cu in.
Air cleaner 2-stage dry element
Fuel Diesel up to B20 compliant
Cooling system Liquid centrifugal pump; forward machine location for optimum cooling

Vehicle

Traction drive
Drive pump Tandem gear pump
Cutting units drive
Hydraulic system capacity 37.8 L
10 U.S. gal.
Fuel tank capacity 60.6 L
16 U.S. gal.
Steering Hydraulic power with double acting steering cylinder
Front drive tires 26.5x14-12 turf
Steering tires 20x12X10-8 turf
Ground pressure 69 kPa
10 psi
Brakes Internal hydraulic wet disc brakes with dynamic braking through closed loop hydrostatic system
ROPS Standard; meets ISO 21299 Standard

Operating weight

Cutting units lowered 1202 kg
2650 lb

Controls

Throttle Automatic controls with AutoPedal foot controls; manual control through TechControl display
Forward/reverse 2-pedal
Mower lift One-touch single handle
Parking brake Electric Switch on Command Arm for Internal Wet Disk Brakes
Seat Suspension seat with seat belts and arm rest; fore/aft adjustment; weight and lumbar adjustment
PTO Electric Switch on Command Arm
Ignition
Work lights
Tilt steering Left Foot operated for easy adjustment
Operator display TechControl Display: Located on Command Arm; displays machine warnings, on-board electrical diagnostics; service timers on large easy to read screen; quick on the go settings for mow and transport speed; Turn Speed; Loadmatch™ and ON/OFF Cruise Control Use selection: all settings are pass code protected
Storage Cup holder; two-way radio; large operator storage located on left hand side of operator station

Dimensions

Height with ROPS 224 cm
88 in.
Length 323 cm
127 in.
Transport width 287 cm
113 in.
Mowing position width 295 cm
116 in.
Wheelbase
Ground speed Mowing
0-12.8 km/h
0-8.0 mph
Transport
0-18.5 km/h
0-11.5 mph
Reverse
0-6.4 km/h
0-5 mph

Cutting Units

Number Five
Size Quick Adjust QA7: 55.9 cm
22 in.
Total width of cut 254 cm
100 in.
Height of cut Ten-blade QA7: 6.3-50.8 mm
Ten-blade QA7: 0.25-2.0 in.
Eight-blade QA7: 6.3-50.8 mm
Eight-blade QA7: 0.25-2.0 in.
Frequency of clip (FOC Reels) OR Blade tip speed (decks) Rollers
Front and rear: 7.6 mm
3 in.
10 Blade: 1.06 mm/km/h
10 Blade: 0.067 in./mph
8 Blade: 1.33 mm/km/h
8 Blade: 0.084 in./mph
Reel diameter 17.8 cm
7 in.
Bedknife adjustment
Backlapping

Sound levels

Operator ear full engine
Operator ear reduced engine rpm (2300 rpm)
Measuring standard ISO 11201
Attachments installed FTCs, reels engaged

Fuel Economy

Actual Fuel usage will vary depending on course conditions, operation, turf and fuel quality 25% load: 2.8 L/hr
0.75 gph
40% load: 4.32 L/hr
1.14 gph
50% load: 5.22 L/hr
1.38 gph

Warranty

Type Two-year limited

Certification

Type ANSI B71.4-2012.

Additional information

Date collected