Scag Power Equipment STT-31BSG manual Engine Deck, Drive System

Section 3

	SPECIFICATIONS
SCAG “SABRE TOOTH TIGER” ZERO-TURN RIDER
	MODEL: STT– 31BSG
ENGINE
General Type:	Heavy duty industrial/commercial
Brand:	Briggs Daihatsu Vanguard Liquid Cooled 31 HP
Model:	DM950G
Horsepower:	31 HP @ 3600 RPM
Type:	water cooled 4 cycle, overhead valve, 3 cylinder, gas engine
Displacement:	952 cc
Cylinders:	3 inline sleeves
Governor:	High-speed flyweight governor, runs faster than engine crankshaft, provides precision
	speed governing and a steady low idle, 3600 rpm (±100 rpm), idle set at 1500 rpm
Air Intake Group:	Canister type air filter system.
Exhaust Group:	Single exhaust canister muffler
Fuel Pump Group:	Electric fuel pump with mechanical choke and fuel shutdown solenoid
Oil Pump Group:	Positive displacement Gerotor™ oil pump with remote oil filter, capacity 3.2 U.S. quarts
	(3.0 ltrs) with oil filter
Valve Group:	Overhead
Electrical/Charging System:	12 volt battery with alternator, solid state ignition with key start, 40 amp regulated
	charging system using a microprocessor and one ignition coil for each cylinder, solenoid
	shift type starter
ENGINE DECK
Fuel Tank:	10 gallon (38.0 litres) seamless polyethylene tank with fuel gauge gas cap
Drive Wheels/Tires:	24x12-12 four-ply pneumatic tubeless, radius edge, offset rims to improve operator’s view
Parking Brake:	Lever operated interlocked parking brake prevents operation with parking brake engaged
Frame:	Compact tractor frame with structural steel tubing construction
DRIVE SYSTEM
Type:	Hydro drive with two variable displacement pumps and two cast iron motors for
	independent control of each drive wheel
Hydro Pumps:	Two Hydro-Gear Model BDP 21L pumps with dump valves for movement without running
	engine
Drive Wheel Motors:	Two 23 cubic inch cast-iron high torque wheel motors
Transmission Belt Idler:	Self-adjusting, self-tightening, sealed bearings
Hydro Fluid Cooling Group:	3 qt. capacity nylon fluid reservoir, uses SAE 20W50 fluid and 10 micron filter
Steering/Travel Control:	Twin lever fingertip steering control with gas shock dampeners for smooth, responsive
	control to each wheel
Axles:	1-1/4" heavy-duty, tapered motor shafts
Wire Harness:	14 gauge wire
Safety Group:	Seat actuated engine kill, neutral interlock, mower engagement (BBC) switch, parking
	brake
Instrument Panel:	Voltmeter, water temperature gauge, oil pressure gauge, key switch, throttle, fuses, manual
	choke, BBC switch (hourmeter located at rear of machine)
Forward Ground Speed Range:	0 to 10.5 mph		-NOTE-
Reverse Ground Speed Range:	0 to 5.0 mph
		The machine will travel at 10.5 mph for

transport purposes. For best cutting performance the forward travel speed should be adjusted depending upon the cutting conditions.

Date of Issue: July, 2002

Specifications Subject To Change Without Notice

8