There are two side-discharge mower-deck options available for the Z997R Diesel ZTrak Mower:

The 60-in. (152-cm) 7-Iron PRO side-discharge deck is suited to a variety of mowing jobs, including trimming and grooming.
The 72-in. (183-cm) 7-Iron PRO side-discharge deck is suited to a variety of mowing jobs, including trimming and grooming on larger properties.

Extra reliability and long life with cast-iron blade spindle housings

On every commercial mower deck there are three 1-in. (25-mm) spindles that are cold-forged and heat-treated for strength. Spindles are supported by precision ball bearings that provide great performance and reliability.

Superior impact strength provided by ductile cast-iron material.
Gusseted design puts reinforcement where it is needed.
Strength of cast iron protects against damage from blade impacts.
Easy access grease fittings are mounted at the top of the spindle shafts for convenience.
Grease pressure-relief valve minimizes seal damage from overfilling with grease and keeps debris from entering housing.
Chance of deck shell damage is minimized with the 8-in. (20.3-cm) diameter housing and six mounting bolts that distribute loads and impacts.
Ability to be reliably rebuilt is provided by use of cast iron.

Shaft-drive mower deck is durable and reliable

Mower decks are shaft driven. Benefits of using this type of system include:

Live independent power take-off (PTO) powers the mower deck.
PTO can be engaged or disengaged on the go for greater productivity.
Hydraulic PTO clutch has delay relief valve for soft engagement.
Wet clutch is designed for long life.
PTO is easily accessible.
250-lb-ft (339-Nm), heavy-duty hydraulic clutch provides long life.
Splined PTO shaft transfers power to the cast-iron gearbox.

60-in. (152-cm) 7-Iron PRO mower deck

Features include:

Higher blade tip speed – 18,000 fpm (5486 m/min) gives more blade strikes per distance of forward travel.
Front baffle is designed to better manage airflow and control clippings.
Ductile cast-iron blade-spindle housings have a gusseted design for extra reinforcement.
Spindle-pocket reinforcement for even greater structural durability.
A raised discharge chute provides even clipping distribution.
7-gauge, 0.179-in. (4.5-mm) steel construction gives commercial durability.
3-spindle design provides a smooth, even cut.
The trim edge of the deck is equipped with a bumper that provides great abrasion resistance to protect the machine and the property.
Plastic discharge deflector reduces damage to foliage and resists bending.
Formed, steel-deck design is stamped from a single sheet of steel to eliminate corners where grass can collect.
Deep deck gives increased vacuum action that reduces dropped clippings.
Shaft drive from engine to mower gives excellent reliability.
Belt drive efficiently transfers power from gearbox to spindles.
Grease fittings are greased from the top for easy access.
Quick-change cutting-height adjustment is easy to use.
Tricycler mulching kits are available.
Blade overlap of 1.57 in. (40 mm), nearly 0.79 in. (20 mm) greater than previous decks, reduces the number of missed grass blades.

72-in. (183-cm) 7-Iron PRO mower deck

Features include:

Higher blade tip speed – 18,000 fpm (5486 m/min) gives more blade strikes per distance of forward travel.
Front baffle is designed to manage airflow and control clippings.
Spindle pocket reinforcement gives greater structural durability.
Ductile cast-iron blade-spindle housings have a gusseted design for extra reinforcement.
A raised discharge chute provides even clipping distribution.
7-gauge, 0.179-in. (4.5-mm) steel construction gives commercial durability.
3-spindle design gives a smooth, even cut.
The trim edge of the deck is equipped with a bumper that provides great abrasion resistance to protect the machine and the property.
Plastic discharge deflector reduces damage to foliage and resists bending.
Formed, steel-deck design is stamped from a single sheet of steel to eliminate corners where grass can collect.
Deep deck gives increased vacuum action that reduces dropped clippings.
Shaft drive from engine to mower gives excellent reliability.
Belt drive efficiently transfers power from gearbox to spindles.
Grease fittings are greased from the top for easy access.
Quick-change cutting-height adjustment is easy to use.
Tricycler mulching kits are available.
Blade overlap of 1.57 in. (40 mm), nearly 0.79 in. (20 mm) greater than previous decks, reduces the number of missed grass blades.

	60-in. (152-cm) Side-Discharge	72-in. (183-cm) Side-Discharge
Mower type	7-Iron PRO – stamped deck	7-Iron PRO – stamped deck
Mower compatibility:
Discharge	Side	Side
Mulching capability	Optional field-installed kit	Optional field-installed kit
Cut-height range	1.5-5 in. (3.8-12.7 cm) 0.25 in. (1.3-cm) increments	1.5-5 in. (3.8-12.7 cm) 0.25 in. (1.3-cm) increments
Cutting width	60 in. (152 cm)	72 in. (183 cm)
Height-of-cut adjustment	Turning knob with foot assist	Turning knob with foot assist
High lift blades:
Blade length	21 in. (53 cm)	25 in. (64 cm)
Blade width	3 in. (7.6 cm)	3 in. (7.6 cm)
Blade thickness	0.25 in. (6.35 mm)	0.25 in. (6.35 mm)
Blade tip speed	17,480 fpm (5.3 km/m)	17,500 fpm (5.3 km/m)
Number of blades	Three	Three
Blade spindles:
Bearings	Grade=ABEC-1	Grade=ABEC-1
Spindles	Cold-forged and heat-treated	Cold-forged and heat-treated
Spindle housings	Ductile cast-iron	Ductile cast-iron
Wheels:
Front anti-scalp rollers	Standard	Standard
Rear anti-scalp rollers	Standard	Standard
Deck construction	One-piece stamped steel	One-piece stamped steel
Deck thickness	7-gauge steel 0.179 in. (4.5 mm)	7-gauge steel 0.179 in. (4.5 mm)

Mower decks are safety certified

Mowers decks are evaluated by the manufacturer (John Deere Turf Care) and conform to American National Standards Institute (ANSI) B71.4 2004 safety certification specifications for commercial turf care equipment.

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