Section 1: Assembly and Set-up
STH2024 Spike Tooth Harrow 322-315M
12/10/18
13
Unfold Wings First
WARNING
!
To avoid serious injury or death:
Allow no one near or behind the harrow while unfolding the
wings. The tongue weight can temporarily shift from positive
to negative. The harrow can tip over backwards or fall
suddenly if the unit comes unhitched, looses hydraulic
pressure or if a cylinder pin falls out.
1.
Unhook transport chain (#3) from chain hook (#4).
2. Unwrap transport chain from around the wing frame.
3. If not already removed, remove clear plastic shipping
tube from transport chain.
4. Rehook transport chain to chain hook at about 6 or 7
links from end chain.
5. Repeat steps 1 & 4 above for the other wing.
6. Start tractor, set brakes and operate engine at low
rpms.
7.
Operate tractor control lever to slowly unfold wings.
Make certain wings are completely unfolded before
continuing with lowering the harrow sections.
Lower Harrow sections Last
WARNING
!
To avoid serious injury or death:
Allow no one near or behind the harrow while lowering the
harrow sections to the ground. The tongue weight can
temporarily shift from positive to negative. The harrow can tip
over backwards or fall suddenly if the unit comes unhitched
from the tractor, looses hydraulic pressure or if a cylinder pin
falls out.
The back harrow sections hang overlapping the front
harrow sections when raised off the ground. Therefore, it
is important to allow room to drive forward while lowering
the harrow to the ground to help spread the harrow
sections out on the ground.
1.
Using tractor control lever for the lift cylinder, lower
spike tooth harrow sections down slowly.
2. Pull forward as the spike teeth begin to lay down on
the ground.
3. Continue to extend lift cylinder even after all of the
harrow sections are laying on the ground to make
certain it is fully extended.
IMPORTANT:
Be certain to remove transport chains
from wings before unfolding wings and do not move
tractor while wings are unfolding.
IMPORTANT:
Make certain wings are completely
unfolded before lowering harrow sections to ground.
Hydraulic cylinders and harrow frame can be
damaged if wings are partially folded while lowering
unit to ground.
Unhook Wing Transport Chains
Figure 1-7
Purge Hydraulic System
DANGER
!
To avoid serious injury or death:
•
Never remove or install lift cylinder with harrow sections
raised even if wings are folded and secured with transport
chains. The harrow sections can fall suddenly if wings are
unfolded with lift cylinder missing. Air trapped in a new or
repaired cylinder will drop the harrow sections suddenly
while unfolding the wings. Either situation can render the
harrow inoperable and cause serious bodily injury or death.
•
Never fold wings until after the lift cylinder is fully
retracted. and harrow frames are fully raised. Folding
wings before fully raising the harrow sections up can bend
and/or break the tongue, hitch assembly and harrow frames.
Also, it can cause serous bodily injury or death.
If wings were jerky while opening or if harrow is jerky
while being lowered to the ground, then the cylinders and
hydraulic lines should be purged of air.
Do not crack hose fittings in order to bleed air from the
hydraulic system. All cylinders are doubling acting and
will self purge themselves of air as hydraulic oil cycles
back and forth through the cylinders several times.
Be sure tractor reservoir is filled properly before
operating the cylinders. If tractor reservoir is low on
hydraulic fluid, there is a chance of drawing air into the
system causing jerky or uneven cylinder movements.
1.
With wings opened and harrow sections resting
firmly on the ground, retract and extend lift cylinder
several times until sections lift and lower without
jerking. Finish with wing sections fully raised up.
2. Retract and extend wing cylinders several times until
wing sections can fold in and out without jerking.
3. Finish with wings folded in, transport chains (#3)
wrapped around wing frames (#5) and hooked to
transport hooks (#4).
33098
NOTE:
See instructions for lift cylinder stop nut on
page 14 if guide bars (#1) do not slide onto wing
support (#2) smoothly when folding wings.
