Howard GEM Rotavator Service And Repair Manual

Service and repair manual PDF download or view online.

74 Pages covering various machine components and variants, clutch, engine removal, gearbox, etc. A3 Foldout Diagram:
Maintenance & Lubrication DiagramInsertion Sheet: Alternative parts/fitment details (6 Pages)

The Howard Gem is the heavy duty hand-controlled rotavator for growers, farmers, and contractors.

Howard Rotavator GEM garden tractor, series III model

Engine: Single cylinder side valve (600 cc.) J.A.P. Mk.III.

Bore And Stroke: 3-3/8-inch diameter x 4 inches (85.7 mm. x 104 mm.)

Engine Speed: 1,800 rpm


Fuel Tank: Fuel and oil tank built as one unit with separate compartments. Fuel capacity 1-1/2 gallons. Oil capacity three pints.

Clutch: Heavy-duty single dry plate.

Gear-box: Three speed and reverse transmission by hardened gears running in oil. All shafts mounted on ball bearings. Differential gear for easy turning automatically locked when rotor is engaged.

Speeds: 1st gear — 0.78 mph; 2nd gear — 1.17 mph; 3rd gear — 1.65 mph; Reverse gear — 1.40 mph

Rotor: Speed 155 rpm 18-inch diameter.

Power Take-off Pulley: 10-inch diameter 4-inch face; 450 rpm; 1,178 feet per minute

Overall Dimensions Of Machine: Length 6-foot 6 inches; Width 2-foot 1-inch *

Weight: 5-1/4 cwt. approximately