KMC Controls 61 Series Manual page 44

If these functions do not happen in the pre-
scribed order, it is possible to damage your
harrow. Three likely things could cause this
sequence to not operate in the correct order;
1. Sequence valve setting is not correct.
2. Restrictor not performing.
3. Operator error in activating the two
circuits in the correct order.
It may be necessary to adjust the hydraulic
valves, check the orifices or re-examine the
order of activating the two circuits. Some
common problems and their solutions follow:
PROBLEM 1: Tail Goes Down Before Wing
The most common occurrence is for the tail
section to go down before the wings are
down. This is usually a problem with the
setting or installation of the sequence valve.
The sequence valve is marked with model
number RV2-10-5-8T-35 and is located on
the left main frame beam, behind the front
wing mount. This valve has an adjustable
pressure activation setting, which will hold
the weight of the tail until the system
pressure overcomes the setting.
a) Check that the port on the valve opposite
to the stem is connected to the hose
going to the tail cylinder.
b) If the valve is improperly installed, lower
the unit as well as possible to the ground,
make sure all the pressure is off the
hydraulics and re-install the valve in the
correct position.
To increase the holding power of this valve:
a) First, loosen the locking nut on the top of
the valve.
b) Next, take a hex socket wrench and tight-
en the stem of the valve, in, a revolution
or so.
c) Re-tighten the locking nut and try the
hydraulics again.
SEPT 2008
45' Rotary Harrow
PROBLEM 2: The Tail and/or Wings Will
Not Go Down
Another common problem is when the tail or
the wings will not go down. There are two
possible causes. The first and most obvious
is that the locking mechanisms have not
been removed.
a) Check the tail and make sure that the bar
that locks the tail section to the rear
beam has been disconnected from the
tail and has been swung all the way
forward and locked down with the locking
pin. If you cannot remove the pin easily,
activate the hydraulics to take any weight
off the bar.
b) Check the pin locks at the top of the front
wing mount. Make sure that they are not
pinning the wing down and that they have
been placed in their storage pipes.
The other possibility is that the sequence
valve was over tightened either at the factory
or by trying to correct Problem 1.
a) First, loose the locking nut on the top of
the valve.
b) Next, take a hex socket wrench and loos-
en the stem of the valve, out, a revolution
or so.
c) Re-tighten the locking nut and try the
hydraulics again.
d) Repeat as required.
If neither of these solutions help, check for
any other obstructions, which could be bind-
ing the sections. Check the tools to make
sure they have not become bound. Check
the tractor hydraulic pressure.
require about 2000 PSI to fully put the unit
from transport to field position.
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