Modern AG 15' Predator - Omni - Manual (Page 66)

66 - 15’ Predatorrr
Maintenance section
slip clutcHes
a slip clutch is incorporated in the PtO driveline. It is designed to slip, absorb the shock load, and
protect the driveline. Clutch torque setting is factory set. If clutch slips excessively, check friction
discs for excessive wear. to adjust clutch, first check length of springs assembled on clutch. Length
should be 1 1/8 (28.5 mm). If not, adjust length of bolt to obtain proper spring length. If additional
adjustments is required, tighten each bolt 1/2 turn. nOte: DO nOt tighten spring bolts over 1/2
turn at any adjustment. excessive tightening can cause clutch to become frozen and not slip which
could cause damage to tractor PtO, drivelines, or gearbox.
avoid over heating of clutches caused by too long frequent slipping of the clutch since this can
damage the friction plates and clutch parts. When checking slip clutch for overheating, do not touch
with hand. Clutch could be extremely hot and cause severe burn.
SEASONAL cLUTcH MAINTENANcE
It is important that the clutches slip when an obstacle or load heavier than the clutch setting is
encountered. Before using the cutter each season, use the following procedure to make sure the
clutch will slip and give the overload protection required.
1. Loosen spring nut until the spring is free, and then retighten approximately one turn.
2. attach machine to tractor, set engine at approximately half throttle and quickly engage PtO.
the procedure will break clutch facings loose and allow the proper torque to be maintained.
3. Return the nuts and bolts to their original position of 1 1/8” compressed spring length for 540
RPm or 1 3/16” for 1000 RPm tractor
Note: if machine sits outside longer than 30 days and is exposed to rain and humid air, the clutches should be
removed from machine and store in dry area. Clutch facing will soak up moisture and cause the metal plates
to rust badly. When this occur, the break-away torque increases greatly and damage to gearbox, driveline, or
tractor PTO can occur.
pressure plate friction plate friction plate friction plate friction plate flange yoke
Bolt set
inner plate inner plate driving plate Bushing
spring
flange hub
L= 1 1/8” (28.5 mm) for 540 RPM machine
L= 1 3/16” (30 mm) for 1000 RPM machine