Knife And Bolt Inspection - New Holland 615 Operator's Manual

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Table Of Contents

Table of Contents

Carefully grab both ends of each disc, and try to

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"rock" the disc up and down. A small amount of

movement [1 mm (0.040 in)] is normal; an

excessive amount of movement may be the

result of a loose disc hub retaining bolt, or could

indicate a worn top cap housing or bearings. Disc

modules with excessive disc "rock" should have

the disc bolts and disc hub bolt checked for

proper torque. The proper torque is 203 N⋅m (150

ft-lb). If a torque wrench is not available, tighten

the bolt 1/4 turn past contacting the washer.

Replace the disc hub retaining bolt if it has

loosened; the bolt is equipped with a locking

agent. If the bolts are tight, and movement still

exists, the top cap assembly may need to be

replaced. Contact your New Holland dealer for

more information.

CAUTION

The bottom leading edge of worn discs can

become very sharp. Wear gloves to prevent

injury. Failure to comply could result in moderate

injury.

Starting at the left end of the cutter bar, grab both

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the #1 and #2 discs, and slowly rotate both discs

while applying pressure to one of the discs

against the direction of rotation. If one disc

suddenly moves, it may indicate damage to the

gear teeth in that module. Excessive free play

between discs, or if one disc may be turned freely

without the other disc moving, may indicate

excessive wear or failure of the intermodule

shaft. Some rotational free play [5 mm (3/16 in)]

between adjacent discs is normal, as a result of

the backlash in both gear sets.

Check all disc modules by working across the

cutter bar, checking each disc to the next disc. If

a problem is discovered, contact your New

Holland dealer for repair assistance.