Hydrostatic Ground Drive System; Cutting Deck - Exmark Frontrunner 720,000 & Higher Serial Nos. Operator's Manual

• Mounting: Hinged to tilt up for access to
hydraulic pumps, battery and other components.
The seat is held in the tilted position with a
linkage. Adjustable fore and aft seat track.
• Armrests: Standard seat: foam padded flip-up
armrests. Optional suspension seat: molded
adjustable flip-up armrests.
• Seat Safety Switch: Internal to the bottom seat
cushion, non serviceable. Time delay module
incorporated into the Safety Interlock System
eliminates rough ground cut-outs.

Hydrostatic Ground Drive System

• Hydrostatic Pumps:
– 27HP Kohler & 31HP Briggs & Stratton
Units: Two Hydro Gear PR 16 cc variable
displacement piston pumps.
– 23HP Kohler Units: Two Hydro Gear PJ
12 cc variable displacement piston pumps.
• Wheel Motors: Hydro Gear planetary reduction
motors.
• Hydraulic Oil Type: Use Mobil 1 15W-50
Synthetic motor oil.
• Hydraulic Oil Capacity:
– 27HP Kohler & 31HP Briggs & Stratton
Units: 5.2 qt. (4.9 L)
– 23HP Kohler Units: 4.0 qt. (3.8 L)
• Hydraulic Filter: Replaceable cartridge type.
P/N 103-2146: 25 microns, No bypass
• Speeds:
– 27HP Kohler & 31HP Briggs & Stratton
Units:
0-10.5 mph (16.9 km/hr) forward
0-6.6mph (10.6 km/hr) reverse
– 23HP Kohler Units:
0-8.7 mph (14.0 km/hr) forward
0-5.7mph (9.2 km/hr) reverse
• Drive wheel release valves allow machine to be
moved when engine is not running.
Tires & Wheels
27HP Kohler & 31HP Briggs & Stratton Units
Drive
Pneumatic
(Air-Filled)
Quantity 2
Tread AT101
Size 24 x
12.00-12
Ply Rating 4
Pressure 9 psi
(62 kPa)
23HP Kohler Units
Drive
Pneumatic
(Air-Filled)
Quantity 2
Tread Turfmate
Size 23 x
10.50-10
Ply Rating 4
Pressure 13 psi
(90 kPa)

Cutting Deck

(Sold Separately)
• Model Numbers:
– FR524
– FR604
– FR724
• Cutting Width:
– 52 inch (132 cm)
– 60 inch (152 cm)
– 72 inch (183 cm)
• Discharge: Side
• Blade Size: (3 ea.)
– 52 inch Deck: 18.00 inches (45.7 cm)
15
Specifications
Front
Rear Caster
Caster
(Dual Tail
Wheel)
Semi- Semi-
Pneumatic Pneumatic
2 2
Smooth Smooth
9 x 3.50-4 13 x 6.5-6
Front Rear Caster
Caster (Single Tail
Wheel)
Semi- Semi-
Pneumatic Pneumatic
2 1
Smooth Smooth
9 x 3.50-4 13 x 6.5-6