Great Plains HD Series Operator Manual

Operator Manual

Models FF and HD

Martens Brand Harrows,

Vintage 2010 and Prior

Manufacturing, Inc.

www.greatplainsmfg.com

Legacy manual provided for owners and users of these model harrows
not manufactured by Great Plains Manufacturing, Inc. For continuing
support and parts of older implements, contact Great Plains.

© Copyright 2010 Printed 11/29/2010 564-000M

EN

Martens Harrow Quick Start Guide
Avoid Damage to your harrow!

Please Read
This Page!

Please read the owners manual, but here are some important
items for you to know to avoid damage to your harrow.

1. Securely attach hitch to tractor Page 3

2. To avoid wing and cylinder damage - extend all cylinders
completely before working in the field. Page 5

3. Do not partially lift harrow for turning or extended periods
while working in the field. Page 5

4. Do not move the machine until wings are fully unfolded or
refolded. Page 4 & 6

5. Fold and unfold wings slowly Page 4 & 6

6. Never back up with the harrow sections on the ground.
Page 5

7. Do not turn so short as to make the wing wheel go
backward. Page 5

8. If the wings do not slide onto the steady rest easily, the
height needs to be adjusted. Page 8

In the manual, we have our safety warnings and operational
warnings to be in bold italic lettering for you to better recognize
these items.

2

OPERATING INSTRUCTIONS FOR MARTENS FRONT
FOLD HARROWS

Unfold to field position.

1. Attach tongue of harrow securely to the towing tractor using sufficient drawbar pin.

Connect cleaned hydraulic couplers of harrow to tractor. Raise jack and swing to
horizontal position WARNING: Make certain harrow is securely attached to the

towing tractor. Tip-over may occur during unfolding if harrow comes loose from
tractor.

2. Disconnect transport safety chains from wing.

3

3.Make certain area around harrow and behind harrow is clear of people and obstacles. With
engine speed at low RPM, slowly operate hydraulic lever to swing wings back until the wings
are unfolded. Do not move the harrow until the wings are fully unfolded. WARNING: Do

not walk or allow others to walk behind harrow when it is in the unfolded vertical position.
Hydraulic malfunctions or the hitch pin coming loose could allow the harrow to tip over
causing serious injury.

4.When the wings are unfolded, the sections will start to be lowered to the ground. When the
rear bars of the sections start to touch the ground, start driving forward slowly.

4

5. Continue lowering sections until they lie flat on the ground.

6.

IMPORTANT -

hydraulic lever to fully extend the wing cylinder so the cylinder pin is approximately in the
center of the slot. This allows up and down travel for the wing over rough ground.

When the sections are on the ground, continue to operate the

I OR

Failure to fully extend cylinder will damage the cylinder or the
framework.

7. Harrow is ready for field use.

WARNING: This harrow is designed to be pulled in the field with the harrows fully on
the ground and all cylinders fully extended at all times. Pulling the machine with the
sections lifted off the ground over extended distances or lifting the harrows off the ground
for turning at corners or end of rows is not recommended and will result in premature
wear of the cylinders, pins, and frame components and those parts will not be warrantied.
Lifting the harrow for a short distance to unplug any residue clog is acceptable. Never
back up with the harrow sections on the ground. Always lift the sections off the ground
before backing up. Do not turn so short as to make the wing wheel roll backward.

5