Bush Hog RTX85G, Operator'S Manual

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MAINTENANCE
RTXG SERIES TILLER 5/19 Maintenance Section 5-5
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© 2020 Alamo Group Inc.
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. Discs are
1/8” thick when new. Replace after 1/32” wear.
To adjust slip clutch, first check length of springs as assembled on clutch. Length should be 1.25 inch. If not,
adjust length of bolt to obtain proper spring length. If additional adjustment 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, Driveline, or Gearbox.
Avoid overheating of clutches caused by too long or too 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 implement each season, use the following procedure to make sure the clutch will slip and give
the overload protection required.
1. Loosen nuts (1) until the spring is free, and then re-tighten approximately one turn.
2. Attach machine to tractor, set engine at approximately half throttle and quickly engage PTO for two or three
seconds, then disengage. This 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 1.25" (31mm) compressed spring length.
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 stored in dry area. Clutch facings will soak up moisture and cause the metal
plates to rust badly. When this occurs, the break-away torque increases greatly and damage to gearbox,
driveline, or tractor PTO can occur.