625 Mower-Conditioner

Clevis hitch

The clevis hitch is in base equipment. This design attaches directly to the tractor drawbar for operator convenience. The heavy-duty clevis design provides a strong attaching point to the drawbar.

For added convenience, the hitch-pin retaining bracket can also be used to store the power take-off (PTO) shaft when the machine is not attached to the tractor.

The clevis hitch is designed to be towed by a tractor only and includes a screw jack and safety chain.

Turn limiters may be required to prevent powerline damage if the hitch point of the tractor is beyond the rear drive wheels of the tractor.

540-rpm overrunning and slip clutch

An overrunning clutch is located near the platform gearcase; this design enables free rotation of the tractor hookup to make attaching to the tractor easier. 

A slip clutch is incorporated into the overrunning clutch to provide protection to the platform.

Drawbar equal-angle hitch

Drawbar extension

The drawbar equal-angle hitch is optional equipment. This hitch option includes:

• Ball-joint hitch—to be installed on the mower-conditioner tongue
• Tractor hookup
• Drawbar extension—to be installed on the tractor drawbar and adjustable with one wrench

The drawbar equal-angle hitch is designed to be towed by a tractor only and includes a screw jack and safety chain.

Turn limiters may be required to prevent powerline damage if the hitch point of the tractor is beyond the rear drive wheels of the tractor.

540-rpm overrunning and slip clutch

An overrunning clutch is located near the platform gearcase. This design enables free rotation of the tractor hookup for easier attaching to the tractor. 

A slip clutch is incorporated into the overrunning clutch to provide protection to the platform.

Rotary cutterbar

The rotary cutterbar is designed and built by John Deere. Large oval disks with free-swinging knives are used to cut the crop.

All cutting disks are the same and are computer-designed for improved wear and cutting performance.

Cutting disks are made of high-strength, austempered steel to ensure the steel is thoroughly and evenly tempered for good wear characteristics.

The disks rotate to give a knife-tip speed of 307 km/h (191 mph) for clean cutting.

The knives are free-swinging to reduce damage if a solid object is struck, and they are reversible to double the useful life.

The knives are removed at the front of the cutterbar for convenience.

Wear caps

Wear caps

Made of austempered, heat-treated, ductile steel for excellent wear characteristics, wear caps are installed on each end of the cutting disks (except on the end disks where crop accelerators are used) to increase the wear life of the cutting disks and knife-bolt nuts.

Wear caps are open on the end to prevent debris from packing in close to the nut, making hardware and knives easier to change.

Modular cutterbar

John Deere's patented design cutterbar is made from individual, diagonal-cut modules.

Serviceability is easy. Modules can be removed individually while leaving the cutterbar attached to the frame.

Made of high-strength, nodular iron castings, each module consists of two idler gears and one drive gear. The large-diameter idler gears transmit power from module to module. The idler gears turn at a relatively slow speed for added durability.

The smaller-diameter pinion drive gear is used only to power the cutting disk. Power is not transmitted from one cutting disk to another except through the large-diameter idler gears.

The modules are interchangeable. Disk rotation is determined by the position of the quill (A). There is a rubber oil seal between each cutting module.

Tough enough for a three-year cutterbar warranty

The durable John Deere cutterbar comes standard with a three-year warranty on all 600 and 800 Series Mower Conditioners.  This warranty covers all internal drive components, such as idler and pinion gears. Wear components, such as knives, wear caps, and shear hubs are not included in the warranty.

Gauge shoe

Steel runners are located under each disk. Right-hand and left-hand adjustable gauge shoes further protect the cutterbar.

The half-moon shaped disk protectors extend past the cutterbar module to protect the cutting disk. 

The disk protectors are made of heat-treated boron steel, whose material characteristics are very similar to spring steel. Resistance to bending is nearly three times greater than molded ductile iron.

Knives rotate close to the disk protectors to give a good shearing action and help to keep the cutterbar clean.

Shearhub

Each cutting disk is attached to a driver (shearhub) on the splined pinion gear. The driver has part of its splines removed so it will shear if the cutting disk receives a severe impact.

The shear strength of the driver is designed to be just slightly less than that of the pinion gear.

Power to the disk is interrupted when the driver shears to protect the internal components of the cutterbar.

Damage is limited to exposed components and does not require disassembly of the cutting modules.

U-joint

Power is transmitted through a U-joint to the first cutting disk.

The U-joint attaches with four bolts to the driver on the first cutting disk. No special tools are required to remove the first cutting disk.

The torque for attaching bolts is the same as for attaching the disk to the driver (149.1 Nm [110 lb-ft] compared to the 339 Nm [250 lb-ft] required to attach the driver to the pinion gear).

Impeller conditioner

Impeller conditioning is standard equipment on all John Deere mower-conditioners.

Proper conditioning in a wide range of crops can be achieved when the conditioner is properly adjusted.

The impeller conditioner works well in legumes, especially alfalfa and most all-grass crops. Impeller conditioners are not recommended for thick-stemmed or cane-type crops, such as sudan or sudex, or crops over 1.5 m (5 ft) tall.

How an impeller conditioner works:

1. As hay is cut by rotating knives, tines pick up the plants and carry them through the machine:

• 33 V-shaped tines are on the 625 Mower-Conditioner; 45 V-shaped tines are on the 630 and 830 Mower-Conditioners; and 57 V-shaped tines are on the 635 and 835 Mower-Conditioners.
• Tines are free swinging to reduce damage to the conditioner if rocks or other solid objects are struck.

2. As the plant passes through, it rubs against the conditioning hood (A) and other plants:

• Scuffing action removes the waxy surface from the stem of the plant to allow for faster evaporation of moisture.

Impeller hood crank handle

Impeller hood position indicator

• The conditioner hood opening is adjustable to accommodate various crop volumes.
• The crank handle allows an infinite number of adjustments between the minimum and maximum conditioning levels. The closer the hood is to the tines, the more aggressive the conditioning.
• A conditioner position indicator provides an easy reference point to control the degree of conditioning.

630 Mower-Coonditioner (shown with shields removed)

3. The speed at which the tines rotate will also affect the degree of conditioning. Two impeller speeds can be achieved by interchanging the upper sheave (A), located under the shield, and the lower sheave (B).

• With the sheaves in the position shown, the impeller turns at 870 rpm; this is ideal for grasses.
• If the sheaves are reversed, the impeller turns at 630 rpm; this is ideal for legume crops.

Handle for forming-shield adjustment

Forming shields are easily adjusted to control material flow. This allows the operator to match the windrow width to harvesting requirements.

Handle for swathboard adjustment

A swathboard is in base equipment for additional control of the windrow formation (for 630 and 635 Mower-Conditioner models only).

Windrow width* is as follows:

*Depending on crop conditions.

The hydraulic cutterbar angle adjustment enables the operator to adjust the cutting angle on the go to match changing ground or field conditions.

NOTE: The hydraulic cutterbar angle adjustment r equires a separate selective control valve (SCV). Three SCVs are required when the machine is equipped with hydraulic tilt control.

The hydraulic cutterbar angle adjustment enables the operator to adjust the cutting angle on the go, to match changing ground or field conditions.

NOTE: The cutterbar angle adjustment requires a separate selective control valve (SCV). Three SCVs are required when the machine is equipped with hydraulic tilt control.

Turnbuckle

The turnbuckle top link is used to adjust the cutting angle adjustment. It includes a wrench for adjusting.

Gauge shoe extension

Tall-crop gauge-shoe extensions (B) are available to meet the needs of operators who wish to maintain a greater stubble height.

Rotary strippers

Rotary strippers can be installed on the end disks to improve crop flow and convergence to the conditioner.

This can improve cutting, minimize crop recirculation, and smooth out material flow through the conditioner.

Drawbar shield

A drawbar shield helps to prevent windrow bunching that can occur when the drawbar contacts heavy windrows.

Seven-pin outlet kit

The seven-terminal electrical outlet is required on tractors not equipped to power the taillights and turn signals.

The following bundles are offered to allow tongue and driveline conversions.

625 Mower-Conditioner illustrated

A safety chain serves as a device to ensure the mower-conditioner stays attached to the tractor, should a drawbar or hitch pin failure occur.

The tractor must be equipped with an intermediate chain support ahead of the hitch pin.

Gauge rollers

Attached behind the cutterbar to reduce wear on the cutterbar wear plate and improve the movement of the header over uneven terrain, as well as in sand or firm soil conditions.

Additional gauge shoes

Improves the placement of the cutterbar in relation to the ground, thereby reducing wear on the
cutterbar and enhancing the in field performance of the header.

Tall crop dividers

The tall crop dividers attach to the ends of the header for clean crop dividing, and reel entry in tall crops. They can be easily adjusted to suit the crop.

Reel bats

Additional reel bats can be purchased and installed to fit the needs of the user.

Double windrow attachment for W150

The double windrow attachment feature lays up to 48-ft. of crop in a single windrow. This is ideal for today’s large forage harvesters, and can translate into significant time and fuel savings for producers who employ this feature.

The following bundles are offered to allow tongue and driveline conversions.

The following bundles are offered to allow tongue and driveline conversions.

The following bundles are offered to allow tongue and driveline conversions.

The following bundles are offered to allow tongue and driveline conversions.