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4 Introduction
MAN0845 (1/12/2011)
SPECIFICATIONS
RD990X
3-Point Hitch Category 1 and 2
Cutting Width 90"
Cutting Height Range 1-1/2" - 7"
Operating Weight with
Chain Shielding 1200 lbs
Blade Speed (feet per minute) 17,000
Blade Speed (RPM) 2,074
Blade Spindles 3
Number of Blades 6
Universal Drive Series ASAE Cat. 4
Caster Wheels 13 x 5 x 10 Solid Rib Tire
-or-
13 x 5 x 6 Pneumatic Tire
Tractor PTO Speed RPM 540
Recommended Maximum
Tractor Horsepower 75HP
Mower Frame Thickness 5/16"
GENERAL INFORMATION
■ Some illustrations in this manual show the
mower with safety shields removed to provide a
better view. The mower should never be operated
with any safety shielding removed.
The purpose of this manual is to assist you in operating
and maintaining your mower. Read it carefully. It fur-
nishes information and instructions that will help you
achieve years of dependable performance. These
instructions have been compiled from extensive field
experience and engineering data. Some information
may be general in nature, due to unknown and varying
operating conditions. However, through experience
and these instructions, you should be able to develop
procedures suitable to your particular situation.
The illustrations and data used in this manual were cur-
rent at the time of printing. However, due to possible
inline production changes, your machine may vary
slightly in detail. We reserve the right to redesign and
change the machines as may be necessary without
notification.
Throughout this manual, references are made to right
and left directions. These are determined by standing
behind the tractor facing the direction of forward travel.