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4-Speed Blade Shaft
The exclusive 4-speed Blade Shaft allows optimum performance with a variety of
different blade sizes under a wide range of conditions.
Fig. 20 — The 4-Speed Blade Shaft
The 4-speed design fully encloses the transmission, bearings and Blade Shaft,
and features an oil bath lubrication (no grease fittings). Oil is cooled, filtered and
circulated, and the assembly utilizes a remote, protected fill and vent. Gear
changes are made with rack & pinion shifting. Positive shift lock prevents the
multi-speed Blade Shaft from jumping out of gear. A Blade Shaft tachometer
assists in gear selection.
The 4 gear ratios are:
1
st
Gear 1.00 : 1
2
nd
Gear 1.34 : 1
3
rd
Gear 1.70 : 1
4
th
Gear 2.02 : 1
The 1: 1 ratio is for the smallest diameter blade. The middle two ratios are for
intermediate sized blades and the 2.02 : 1 ratio is for the largest blade. Blade
range is from 16” to 48”.
See page 21 or visit our web site: www.multiquip.com for additional
discussion of the 4-speed Blade Shaft, gears, and sheave ratios.
To calculate Blade Shaft speed, assuming a 1:1 ratio between engine and blade
shaft input, divide engine speed by the selected ratio. For example, for the 3
rd
gear Blade Shaft RPM: 2500 Engine RPM ÷ 1.7 = 1470 Blade Shaft RPM in 3
rd
gear.
The gear pattern is marked on the casting around the shift lever.