Hydraulic Pitch Control - Grizzly Field Boss Folding Wing Manual

10 Operating Instructions

10:7 Hydraulic pitch control

The Grizzly hydraulic pitch control allows the
operator to adjust the relative level of the front
and rear gangs to maintain the best possible
level finish.
The pitch control springs supply enough
rigidity to allow easy hydraulic adjustment
to give control of furrows or ridges left in the
centre of the worked ground.
They should also be flexible enough to allow
the plough frame to rise over undulations.
IMPORTANT!
If the swivel assembly is removed
for service, always use Loctite stud
lock to secure the bolts. Tighten to
.
450ft/lb
Loctite bolts use high strength loctite
32
Adjusting the pitch control.:
With the hydraulic pitch control cylinder
adjusted to around mid position (ram extended
halfway), and the machine level, work the
machine in typical working soil conditions at
required working depth for 50 meters.
After stopping the machine, note the quality
of the ploughed finish, the ploughed ground
should be level across the width of the
machine.
Adjust if the following occurs:
a) A hollow exists in the centre of ploughed
work. If a furrow exists in the centre of
ploughed work, adjust the hydraulic pitch
control ram to raise the front and lower the
rear of the machine.
b) A ridge in the centre of ploughed work.
If a ridge appears, it will be necessary to
adjust the hydraulic pitch control ram to raise
the rear and lower the front of the machine.
• Top Springs
The top springs should show 30mm of the
thread above the lock nut.
To adjust the top springs:
a) Lower the plough onto the ground and
extend the hydraulic pitch control cylinder to
relieve pressure on top springs.
b) Loosen the lock nut and adjust so that there
is 30mm of thread extend through the lock
nut.
c) Tighten the lock nut.
Specifications are subject to change without prior notification
Correctly adjusted the top springs have 30mm of
thread extending through the lock nut.
From serial number 6714
Including 6586, 6666, 6703