Simplicity lawn tractors

Simplicity 9020 PowrMax

The Simplicity 9020 PowrMax is a garden tractor produced from 1975 to 1980 by Simplicity in Port Washington, Wisconsin, USA. It features a 19.5 hp Onan 816cc 2-cylinder gasoline engine, hydrostatic transmission by Sundstrand with infinite forward and reverse speeds in 3 ranges, and two-wheel drive with manual steering and disc brakes. The tractor includes independent front and rear PTOs with electric clutches, a 500 psi hydraulic system, and an open operator station. It supports various attachments including a 60" mid-mount mower deck, snowblower, blade, and front-end loaders built by Ark. The 9020 PowrMax is part of the PowrMax Series and has variants similar to Allis Chalmers 720 and Montgomery Ward Twin 20 models.

Power19 hp

Founded60" deck

Model9020

View Images

Technical Specifications

Detailed specifications and technical data for Simplicity 9020 PowrMax

Power

Power	19.5 hp

Tires

Ag rear	8.00-16, 31.5-15.5
Ag front	4.00-12, 6.00-9
Lawn/turf rear	29x12.00-15
Lawn/turf front	20x8.00-10

Engine

Type	gasoline
Model	Onan CCKB
Starter	electric
Idle RPM	1300-3850
Cylinders	2-cylinder
Point gap	0.020 inches (0.508 mm)
Rated RPM	3600
Sparkplug	Champion H-8, Autolite AL5
Air cleaner	paper element
Bore/Stroke	3.25x3.00 inches (83 x 76 mm)
Displacement	816 cc (49.8 ci)
Oil capacity	4 qts (3.8 L)
Configuration	air-cooled horizontal-shaft opposed-twin
Power (gross)	19.5 hp (14.5 kW)
Sparkplug gap	0.025 inches (0.635 mm)
Starter volts	12
Compression ratio	7:1
Oil change interval	100 h

Variants

720	similar Allis Chalmers model
Twin 20	similar Montgomery Ward model

Dimensions

Width	56 inches (142 cm)
Length	83 inches (210 cm)
Wheelbase	56 inches (142 cm)
Shipping weight	1300 lbs (589 kg)
Clearance (drawbar)	13 inches (33 cm)
Clearance (front axle)	15 inches (38 cm)
Height (steering wheel)	48 inches (121 cm)

Electrical

Ground	negative
Battery AH	45
Battery volts	12
Charging amps	20
Charging volts	12
Charging system	flywheel alternator

Hydraulics

Pressure	500 psi (34.5 bar)
Total flow	2.5 gpm (9.5 lpm)

Mechanical

Drive	Two-wheel drive
Brakes	Disc brakes
Steering	Manual steering
Operator station	Open operator station

Production

Type	Garden tractor
Series	PowrMax Series
Built in	Port Washington, Wisconsin, USA
Years produced	1975 - 1980

Attachments

Mowers	48-inch rear-mounted rotary mower, 57-inch sickle bar mower, belly mower
Overview	60" mid-mount mower deck, snowblower, blade, front-end loader
60" Blade	Simplicity, front-mount, 60 inches width (152 cm), 225 lbs (102 kg), hydraulic-lift
Tillage tools	54-inch cultivator, 12-inch plow, 48-inch tiller
1690112 Loader	built by Ark, 400 lbs lift (full at pin) (181 kg), 650 lbs breakout (294 kg), 45° dump, 24.75 inches reach (dumped) (62 cm), 52 inches reach (ground) (132 cm), 8° rollback (ground line), 85 inches height (at pin) (215 cm), 66.5 inches clearance (dumped) (168 cm), Bucket width: 40 inches (101 cm), Bucket width: 48 inches (121 cm)
1690157 Loader	built by Ark, 400 lbs lift (full at pin) (181 kg), 650 lbs breakout (294 kg), 43° dump, 23.5 inches reach (dumped) (59 cm), 51.5 inches reach (ground) (130 cm), 8° rollback (ground line), 86.5 inches height (at pin) (219 cm), 69 inches clearance (dumped) (175 cm), Bucket width: 48 inches (121 cm)
60" Mower deck	mid-mount Simplicity, 3-blade with hydraulic lift, Cutting width 60 inches (152 cm), Weight 290 lbs (131 kg), Overall width 71 inches (180 cm), Cut height 1.625 to 3 inch (4 to 7 cm)
52" Snow blower	Simplicity, 52 inches width (132 cm), single-stage, front-mount, 340 lbs (154 kg)
Aircraft towing hitch	tows planes up to 25,000 pounds