Table of Contents
Advertisement
Section 4: Maintenance & Lubrication
Driveline Maintenance
!
DANGER
To prevent serious injury or death:
•
Tractor power take-off shaft shield, driveline shields, and
gearbox shaft shields must be installed and in good working
condition to avoid driveline entanglement and projectiles
flying off of the driveline.
•
Always disconnect driveline from the tractor before
servicing the drivetrain and components powered by the
drivetrain. A person can become entangled in the drivetrain
if the tractor is started and the power take-off is engaged.
!
WARNING
To prevent serious injury or death:
•
A slip clutch that has been in use or has slipped for as little
as only two or three seconds during run-in may be too hot
to touch. Allow a hot clutch to cool before working on it.
•
Do not operate a broken or bent driveline. Such a driveline
will break apart while rotating at high speeds. Always
remove the implement from use until the damaged driveline
can be repaired or replaced.
Tiller drive components are protected from shock loads
with either a two plate friction clutch or a shear bolt.
Shear bolt protection is discussed on page 26.
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 the inner friction plates.
Shear Bolt Protection
Avoid shear bolt breakage by making sure the tiller is out
of the ground before engaging power take-off. Engage
power take-off slowly at low engine rpm. Increase engine
speed to 540 rpm only after tines are rotating.
IMPORTANT: Replace shear bolts with genuine
OEM shear bolts.
See table below for correct shear bolt and nut part
numbers. Torque shear bolt nuts to 7-9 ft- lbs.
Shear Bolt and Locknut Part Numbers
Part No.
Part Description
6690845
M8 x 45 Bolt with nut (Kit)
26
RTR574 Rotary Tillers 311-431M
Table of Contents
Clutches With 4 Adjusting Nuts
Clutch Run-In
Refer to Figure 4-2 (View - A):
1.
Using a pencil or other marker, scribe a line across the
exposed edges of the clutch plates and friction disks.
2. Tighten all 4 nuts uniformly until spring load is low
enough to slip the clutch freely with power take-off
engaged.
3. Start tractor and engage power take-off for 2-3
seconds to permit slippage of clutch surfaces.
Disengage power take-off, then re-engage a second
time for 2-3 seconds. Disengage power take-off, shut
off tractor, and remove key. Wait for all components to
stop before dismounting from tractor.
4. 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 &
Assembly" on page 26.
Refer to Figure 4-2 (View - B):
5. Turn all 4 nuts fully back if no two marks on the
friction disk and plate are still aligned. Clutch is ready
for use.
6. The clutch should be checked during first hour of
tilling and periodically each week. An additional set
of scribe marks can be added to check for slippage.
Clutch Disassembly & Assembly
If clutch run-in procedure indicates that one or more of the
friction disks did not slip, then the clutch must be
disassembled to separate the friction disks.
IMPORTANT: Secure clutch firmly in a vise or other
clamping device.
Clutches With 4 Adjusting Nuts
Figure 4-2
23696
1/16/24
Advertisement
Table of Contents
