Section 2: Adjustments; Slip Clutch Adjustments; Deck Leveling - Priefert FMX Operator's Manual

Section 2: Adjustments

Slip Clutch Adjustment
Figure 2-1a—Slip Clutch Adjustment and Figure 2-1b Spring
Compression
The slip clutch is designed to slip while under excessive torque to protect
the gearbox and drivelines, should the implement strike an obstruction.
This slip clutch is factory preset to the correct torque for protecting the
implement and the tractor PTO. A new slip clutch or one that has been
stored over the winter may seize. Before operating, make sure it will slip by:
1. Make sure tractor engine is turned off and key is removed.
2. Loosen the eight nuts retaining the springs by a 1/3 to 1/4 turn or
until you can turn the springs.
3. With tractor at idle speed, engage the tractor's PTO drive for 2 to 3
seconds. If the clutch slips without turning blades skip to step 4.
If the clutch does not slip freely, disassemble and clean the clutch
face plates, yoke and plate and clutch hub—reassemble the clutch
and test again. If clutch continues to slip even though the springs
are compressed to the proper length, then check the friction disc
for excessive wear. Discs are 1/8" when new, if discs are less than
1/16" then replace with new discs. Contact your local authorized
Priefert dealer for further assistance.
4. Tighten each of the eight nuts until the springs are compressed to
the necessary tightness. Ensure that all compression bolts are set
to the same compression depth.
5. Check all spring lengths are the same (H); adjust nut on any spring
that is unequal in length. Refer to Figure 2-1b—Spring Compression.
Figure 2-1a—Slip Clutch Adjustment
Important: Failure to retighten nuts may cause damage to implement
and/or tractor due to improper slip clutch torque setting!
Figure 2-1b—Spring Compression
Note: Adjustment of the slip clutch is to provide only enough torque
to prevent slippage under normal operating conditions. Occasional
slippage is normal and provides protection to the driveline. If you are
not satisfied with your results please contact your local authorized
Priefert dealer for further assistance.
Leveling Procedure
There are 4 primary adjustments that should be made prior to actual
field operations:
1.Deck leveling from left to right.
2.Tractor top link length.
3.Tractor lower link height.
4.Tail-wheel height.
Proper adjustment of each of these items will provide for higher
efficiency, improved cutting performance and longer blade life.
The following tools will be needed:
Pliable tape measure.
•
Spirit or carpenters level.
•
Open end or hex end wrench or socket set.
•
Protective gloves.
•
DANGER
Engage parking brake, disengage PTO, shut off tractor and
remove key before proceeding. Ensure that all moving parts have
come to a complete stop before dismounting the tractor.
Deck Leveling From Left to Right
Refer to Figure 2-2:
1. Locate tractor with implement on a flat, level surface.
2. Use tractor's hydraulic 3-point control lever to lower implement
until the tail-wheel makes contact with the ground surface.
3. Place a level or another suitable leveling device on the front of
the implement's deck as shown in Figure 2-1. Manually adjust
either one or both of the tractor's lower 3-point arm height
adjustments to level the deck from left to right. Some tractors
have only a single adjusting crank.
Figure 2-2—Deck Leveling
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