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Section 4: Maintenance
Servicing
Proper servicing and adjustment is the key to the long life of any imple-
ment. With careful inspection and routine maintenance, you can avoid
costly down time and repair. Do not get under the machine to make
measurements or adjustments without securely blocking implement first.
General Maintenance
1.
Check all bolts after each use.
2.
Replace any worn, damaged or illegible safety labels by obtaining
new labels from your Priefert Dealer. If you are operating your
implement in a heavy duty capacity then maintenance operations
may need to be performed more frequently.
Before you add oil to the gearbox, it is important that the fill plug
3.
area be wiped clean before removing plugs. Debris mixed into the
lubricants will rapidly wear the parts and destroy bearings and
gears. Oil levels must be checked when implement is on a level
surface.
DANGER
Always disconnect main driveline from tractor PTO before ser-
vicing the underside of the implement's deck. Implement can
be engaged if tractor is started resulting in damage to the implement,
bodily injury and/or death.
WARNING
Always secure implement's deck in the up position with solid
supports before servicing the underside of the implement.
Never work under equipment supported by hydraulics. Hydrau-
lics can drop equipment if controls are actuated or if hydraulic lines
burst. Either situations can drop the implement instantly even when
power to the hydraulics is shut off.
CAUTION
Use heavy leather gloves when sharpening or replacing blades.
Maintenance Schedule
Every 8 Hours of Service:
Grease the support of the rotor.
•
Grease the "U" joints of the PTO driveline.
•
Check the bolts that connect the blades to the rotor.
•
Every 50 Hours of Service:
Change the first oil fill in the gearbox after the initial 50 hours of
•
service. After this point, oil should be changed after every 250
hours of service.
Check blades for wear or damage. Replace if necessary. Never
•
try to straighten a bent blade.
Disconnect and clean the PTO driveline. Cover the sliding parts
•
with grease before reassembling.
Every 250 Hours of Service:
Change oil in the gearbox.
•
Blade Maintenance
Always inspect implement blades before each use. Make certain these
are properly installed and are in good working condition. Use only origi-
nal blades on the implement as they are made of a special heat-treated
alloy steel. Substituting blades from other manufacturers may not meet
our specifications and may create a hazardous situation if these fail.
22
Replace any blade that is damaged, worn, bent or excessively nicked.
Never try to straighten a bent blade! Small nicks can be ground out
when sharpening.
Blade Sharpening
Blades should be sharpened at both cutting edges at the same angle as
the original cutting edge. Do not sharpen blade to a razor edge, but
leave a 1/32" blunt edge. Balance each blade after sharpening
Note: Care should be taken in order not to remove any more material
than necessary to sharpen blade.
Blade Replacement
Blade bolts are right-handed bolts.
1.
Always install blade cutting edge facing direction of rotation.
2.
Remove the bolt counter-clockwise and blade washer from the
bottom of the blade to be replaced. Remove blade.
3.
Inspect bolts and nuts threads to ensure that these are not worn or
damaged. Replace worn or damaged bolts and nuts.
4.
Install the blade washer into the center hole on blade.
5.
Replace the bolt and tighten clockwise.
IMPORTANT: Not replacing both blades will result in an out-of-balance
condition that will contribute to premature bearing wear.
Shear Bolt Replacement
WARNING
Failure to reinstall the retaining clip on the input shaft can result in
injury or death.
1.
Slide the shield yoke back.
2.
Remove damaged shear bolt and nut with a hammer and punch.
3.
Replace damaged or lost shear bolt by realigning the holes in yoke
and shaft.
4.
Install new shear bolt and secure with nut.
5.
Secure yoke shield by locking back into place.
Blade Spindle Maintenance (FMX models only)
Blade spindles should be lubricated after every 8 hours of operation.
Our mowers provide easy access to the spindles via holes on outer
shield. When lubricating the spindle allow for a small amount of excess
grease to vent through top seal.
Note: Do not over lubricate the spindles as excess grease may dam-
age belt drive.
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Troubleshooting
