Bourgault 7200 Heavy Harrow ~ A Wide Range of Standard Features
Total
Hydraulic Control
Straw conditions are not always going to be ideal. The ability
to make all of the adjustments that affect the operation
of the bar on-the-fly is as fundamentally necessary to the
proper operation of a heavy harrow. Any heavy harrow will
do a good job in perfect conditions but only the 7200 will
still be performing when conditions deteriorate.
Advanced Hydraulic Cylinders The 4” x 24” cylinders that control the rotation
of the main boom are specially designed for operating over
rough ground when in a horizontal position by using extra
hardened supports in the cylinder gland. All other hydraulic
cylinders are advanced design, re-phasing, with the Teflon®
piston seal protected from contamination damage by wiper
seals located on both sides of the piston seal.
Long
Life Harrow Tines The 7200 features 5 rows of (14 x 660mm) straight tines
on 20” (508mm) centers. Straight tines are used to
ensure the most uniform straw release. The tines are adjustable
between 45° and 80°. The tine angle is adjusted
on-the-fly using hydraulic cylinders and heavy duty rock-shafts.
Tine down pressure is also adjustable on-the-go. Optional
5/8” x 26” (16 x 660mm)tines are available by
special order.)
Spring Loaded Sections Each harrow section is spring loaded using heavy-duty extension
springs. These springs eliminate harrow bouncing regardless
of the operating speed. They also allow the operator to
apply high down forces on the harrow sections, yet allow
the section to trip out without damage when an obstacle
is encountered. The amount of down pressure on the sections
is fully adjustable from the cab allowing the operator to
select the optimum down pressure for the situation.
Visible Gauges Tine angle, down force, and harrow section angle are fully hydraulically controlled
and can be made on-the-fly to adjust for variable straw conditions. Highly visible indicator gauges let the operator
know at a glance how the bar is adjusted. The gauges make it easy for an operator to return to previous settings.
Trouble Free Operation The booms are 8” x 8” x .250” (203 x 203x 6mm) wall hollow structural steel. The hitch beams are
made of 8” x 3” (203 x 76mm) hollow structural steel. The rock-shafts are 3½” (89mm) in diameter,
and made of heavy wall tubing. The heavy-duty knuckle system uses 1½” (38mm) diameter pins. The 7200 is
designed and tested to handle high-speed operation with the highest horsepower tractors.
Double
Acting Cable A Double Acting Cable design gives
the operator the benefits of a cable and a solid draw without
any negative effects. The design consists of cables linking
the wing booms to the front of the hitch to take the working
draft loads and a pair of cables at the rear of the bar
limiting the forward movement of wing booms.
Automatic Boom Latch The 7200 features an automatically locking/unlocking system
to release the cable boom draws. The rotation of the main
center boom activates the latches just before the harrows
are vertically positioned. To ensure that accidental unlocking
of the boom draws cannot occur, the 7200 features a quick
and easy method of deactivating the latches.
The 7200 Heavy Harrow can be ordered with a Valmar granular
herbicide applicator installed by Bourgault’s factory personnel.
