Discs - New Holland 615 Operator's Manual

BREAKAWAY LATCH
The breakaway latch assembly consists of a
spring-loaded assembly with machined dog and
pawl. The spring mount is designed to provide a
range of adjustment for the different widths of
mowers and different operating conditions; initially,
adjust the spring length, 1, as follows:
615 disc mower: 172 mm (6-3/4 in)
616 disc mower: 165 mm (6-1/2 in)
617 disc mower: 159 mm (6-1/4 in)
If the disc mower is operated in rough terrain, and
excessive breakaways are experienced, the spring
may be further tightened as necessary to eliminate
nuisance breakaways.
IMPORTANT: Do not tighten spring to a length less
than 149 mm (5-7/8 in) or structural failure of the
mower may occur.
If the spring nut is fully tightened, and excessive
breakaways are still experienced, check the
following areas:
Excessive wear on breakaway dog and pawl.
•
Insufficient cutter bar flotation force.
•
Excessive ground speed.
•
Periodically loosen the spring and operate the
breakaway to be sure it is not rusted fast. Retighten
the spring to the correct spring length.
WARNING
Disengage the PTO, turn off the tractor engine
and remove the key. Wait for all movement to
stop before leaving the operator's position.
Never adjust, lubricate, clean or unplug machine
with the engine running. Failure to comply could
result in death or serious injury.

DISCS

Each time knives are replaced or turned, check the
discs for damage and wear. If a disc is bent or
cracked, replace it. When the leading edge of the disc
wears thin, it can be installed on an opposite rotating
module to utilize the second face.
IMPORTANT: Do not make weld repairs to the discs,
as this will affect disc strength and balance.
Remove discs by removing four bolts, 1.
SECTION 4 - MAINTENANCE
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