Land Pride RCR1548 Operator's Manual page 26

Section 5: Maintenance & Lubrication
Slip-Clutch Protected Drivelines
!
WARNING
To prevent serious injury or death:
Always disengage power take-off, place tractor in park or set
park brake, shut tractor engine off, remove switch key, and
wait for all moving parts to stop before dismounting tractor.
Cutter drive components are protected from shock loads
by either a two plate friction clutch or a shear bolt. The
shearbolt is designed to shear off when the blade
impacts objects that the cutter is not designed to cut
through. Avoid shear bolt failure by engaging the PTO
slowly at low engine rpm. See your Land Pride Dealer
when replacing shear bolts.
Shear Bolt, Nut & Jam Nut Part Numbers
Part No. Part Description
802-264C HHCS 1/2-13X3 1/2 GR2
803-020C NUT HEX 1/2-13 PLT
803-036C NUT HEX JAM 1/2-13 PLT
Clutch Run-In
Figure 4-3
Clutch Run-In
The clutch must be capable of slippage during operation
to protect gearbox, driveline and other drive train parts.
Friction clutches should be "Run-in" prior to initial
operation and after long periods of inactivity. To protect
driveline and gearbox, repeat "Run-In" instructions at the
beginning of each season and when moisture and/or
condensation seizes the inner friction plates.
Refer to Figure 4-3:
1. Using a pencil or other marker scribe a line across the
exposed edges of the clutch plates and friction discs.
2. Carefully loosen each of the 8 spring retainer nuts by
exactly 2 revolutions. It will be necessary to hold the
hex end of the retainer bolt in order to count the exact
number of revolutions.
3. Start the tractor and engage the driveline drive for
2-3 seconds to permit slippage of the clutch
surfaces. Disengage the driveline, then re-engage a
second time for 2-3 seconds. Disengage driveline,
shut off tractor, and remove key. Wait for all
components to stop before dismounting from tractor.
22
RCR1542 & RCR1548 Rotary Cutters 312-556M
Table of Contents
4. Inspect the 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 disc and plate are still aligned.
IMPORTANT: If clutch run-in procedure indicated
that one or more friction disks did not slip, the clutch
must be disassembled to separate the friction discs.
5. Tighten each of the 8 spring retainer nuts on the
clutch housing exactly 2 revolutions to restore the
clutch to the original setting pressure.
6. The clutch should be checked during the first hour of
operation and periodically each week. An additional
set of scribe marks can be added to check for
slippage. See "Clutch Assembly" to adjust for
proper spring length.
Clutch Disassembly
Refer to Figure 4-4:
To disassemble the clutch, first remove the spring
retainer nuts (#1), springs (#2), and bolts (#3) from the
assembly. Each friction disc (#4) must then be separated
from the metal surface adjacent to it. Inspect all parts for
excessive wear and condition. Clean all parts that do not
require replacement.
13693
Inspection
Inspect all parts for excessive wear and condition. Clean
all parts that do not require replacement.The original
friction disc thickness is 1/8" and should be replaced if
the thickness falls below 3/32". If the clutches have been
slipped to the point of "smoking" , the friction discs may be
damaged and should be replaced. Heat build-up may
also affect the yoke joints.
Clutch Disassembly
Figure 4-4
19783
10/11/17