830-860 SERIES SELF-PROPELLED MOWERS
21
Large-wheel mowers
Differences between the 830 Series (small rear
wheels) and the 860 Series (large rear wheels) include:
•
An added reduction gear within the rear wheel to
keep the ground speed within the desired range.
•
Different handlebar bracket / height adjuster
bracket assemblies
•
Shorter lower handlebars on the 860 series.
•
Different height adjuster connector link and han-
dle.
•
Height adjuster lever on opposite sides of the
mower: left--hand side for 830, right-hand side
for 860.
•
Straight rear wheel carrier assembly (rear axle)
on the 860 Vs. bowed rear wheel carrier assem-
bly on the 830.
•
The rear wheels and covers
Rear wheel removal:
1.
Pry-out the outer edge of the wheel cover.
See Figure 6.19.
Figure 6.19
2.
The wheel cover is held to the rear wheel by a
relatively small grip-ring, near the hub of the
wheel. See Figure 6.20.
3.
Remove the nut and flat washer from the axle
using a 9/16” wrench.
4.
Pull the wheel off of the wheel axle.
See Figure 6.21.
NOTE:
The 830 Series employs a spur gear that
drives against the outside of the gear attached to
the wheel. In that arrangement, the spur gear
and the wheel rotate in opposite directions.
The 860 Series uses a spur gear to drive an idler
in the opposite direction. The idler then drives
against the inside of a ring gear on the wheel,
driving the wheel in the same direction as the
idler. This arrangement permits use of one
transmission with two reduction ratios.
Figure 6.20
Wheel cover
Grip ring
Figure 6.21
Dust cover
Idler gear
Wheel axle
Ring gear
Spur gear
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