Tiger Products Co., Ltd TWR-180 - Manual (Page 41)

OPERATION
OPERATION
Operation Section 4-7
© 2004 Alamo Group Inc.
TWR-180 / TWR-120 12/04
The horsepower required to operate the mower depends on several operating factors including the vegetation to be
cut, terrain condition, operator experience, condition of the mower and tractor, and other factors. The recommended
tractor HP for the TWR-180 is 85 HP, minimum 65 HP. The recommended tractor HP for the TWR-120 is 75 HP,
minimum 50 HP. Operating the mower with a tractor that does not have enough power will produce a less desirable
cut and may cause tractor engine damage.
2.3 Tractor Horsepower
2.4 Drawbar
16" (1000 RPM 1-3/8”-21)
20” (1000 RPM 1-3/4”-20)
Position the length of the drawbar from the end of the
tractor PTO shaft to the drawbar hitch hole according
to the operating speed of the mower. If the mower is
a 540 RPM unit, position the drawbar length from shaft
end to hitch hole at 14”. For 1000 RPM mowers, set
the drawbar length at 16” for 21 spline 1-3/8” mowers
and at 20” for 1-3/4” 20 spline mowers.
2.6 Front End Weight
A minimum of 20% total tractor weight must be maintained on the tractor front end at all times. Front end weight
is critical to maintain steering control and to prevent the tractor from rearing up while driving. If the front end is
too light, add weight until a minimum of 20% total weight is reached on the front tires. Front weights and weight
carriers can be purchased through an authorized tractor dealership.
2.5 Tractor Hydraulics
The mower deck and wings are raised and lowered with hydraulic cylinders operated by the tractor hydraulic
pump. There are several ways to configure the mower hydraulics depending on the number of tractor selective
control valves and if they are single or double acting. The mower can be operated on a tractor with a minimum of
three single acting circuits. One double acting and two single acting cylinders or a three spool control valve must
be used to operate the mower equipped with hydraulic phasing cylinders.
Refer to the assembly and parts section of this manual for hydraulic system set-up or contact an authorized dealer
for the best configuration depending on your tractor hydraulic capabilities and your intended mower use.
Tractor Drawbar Length
(Based on Mower Operating Speed)
TONGUE
14" (540 RPM 1-3/8”-6)
DRAWBAR