Land Pride RC5020 - Manual (Page 37)

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Section 5: Maintenance & Lubrication
5/29/13 RC5020 (540 RPM) and RCM5020 (1000 RPM) Rotary Cutters 318-474M
Table of Contents
Drivelines With Slip Clutches
!
WARNING
Always disengage PTO, place tractor in park or set park
brake, shut tractor engine off, remove switch key, and wait for
blades to come to a complete stop before dismounting from
tractor to work on or around revolving components.
!
CAUTION
Slip clutches that have been in use or have been slipped for
only two or three seconds during run-in may be too hot to
touch. Allow a hot clutch to cool before working on it.
Drive components are protected from shock loads by a
friction slip clutch. The clutch must be capable of
slippage during operation.
Friction clutches should be “run-in” prior to initial
operation and after long periods of inactivity to remove
any oxidation that may have accumulated on the friction
surfaces. Repeat “run-in” instructions at the beginning of
each season and when moisture and/or condensation
seizes inner friction plates.
Refer to Figure 5-6 to determine which friction clutch
your cutter has. Follow run-in, disassembly and
assembly instructions for your specific slip clutch.
Clutch Types
Figure 5-6
IMPORTANT: Prior to initial operation and after 10
days of inactivity, slip clutch to remove any oxidation
and moisture or damage to driveline will result. This
damage is NOT covered under warranty!
Type A Clutch Type B Clutch
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Type A Clutches
Clutch Run-In
Refer to Figure 5-7:
1. Using a pencil or other marker, scribe a line across the
exposed edges of the clutch plates and friction disks.
2. Carefully loosen each of the 8 spring retainer nuts by
exactly 2 revolutions. It will be necessary to hold hex
end of retainer bolt in order to count the exact
number of revolutions.
Type A Clutch Run-In
Figure 5-7
3. Make sure the area is clear of all bystanders and
machine is safe to operate.
4. Start tractor and engage PTO drive for 2-3 seconds
to permit clutch surfaces to slip. Disengage and
re-engage PTO for 2-3 seconds. Disengage PTO,
shut tractor off and remove key. Wait for all
components to stop before dismounting from tractor.
5. Inspect clutch and ensure that the scribed markings
made on the clutch plates have changed position.
Slippage has not occurred if any two marks on the
friction disk and plate are still aligned. A clutch that
has not slipped must be disassembled to separate
the friction disk plates. See “Clutch Disassembly,
Inspection & Assembly” below.
6. Tighten each of the 8 spring retainer nuts on the
clutch housing exactly 2 revolutions to restore clutch
to original setting pressure.
7. Allow clutch to cool to ambient temperature before
operating again. Clutch is now ready for use.
8. The clutch should be checked during the first hour of
cutting and periodically each week. An additional set
of scribe marks can be added to check for slippage.
See Figure 5-9 to adjust spring length.
Clutch Disassembly, Inspection & Assembly
If clutch run-in procedure above indicated that one or more
friction disks did not slip, then the clutch must be
disassembled to separate the friction disks.
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