Section 4: Maintenance & Lubrication
RTA2562, RTA2570, & RTA3576 Rotary Tillers 311-254M
1/18/21
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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 disk and plate are still aligned. A clutch
that has not slipped must be disassembled to
separate the friction disk plates. See
to disassemble clutch.
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
to adjust for
proper spring length.
Clutch Disassembly (826-668C only)
Figure 4-5
Clutch Disassembly
If the clutch run-in procedure, (See
page 24), indicated that one or more of the friction disks did
not slip, the clutch must be disassembled to separate the
friction discs.
Refer to Figure 4-5:
See
IMPORTANT NOTE
above before disassembling
clutch. After measuring and recording each spring length,
remove spring retainer nuts (#1), springs (#2), and bolts
(#3). Each friction disc (#4) must then be separated from
the metal surface adjacent to it.
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IMPORTANT: Keep
track of order and orientation of
your clutch components during disassembly
IMPORTANT: Refer to Figure 4-6.
measure and record length (“A”) of each clutch
spring before disassembling the clutch.
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" (3.2mm) and should be
replaced if thickness falls below 3/64" (1.1mm). If
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 Assembly
Refer to Figure 4-5:
Reassemble each friction disk (#4) next to the metal plate
it was separated from. Make certain all bushing are
replaced in the same location as when removed. Install
bolts (#3) through end plates and intermediate plates as
shown. Place springs (#2) over the bolts and secure with
nuts (#1).
Clutch Adjustment
Figure 4-6
Refer to Figure 4-6:
Progressively tighten each spring retainer bolt until
correct spring height (“A” dimension) is reached.
Driveline No.
PTO
Speed
A (inches)
Spring Height
311-132A
540
1.25" (32 mm)
A = Measured length of each spring
before disassembling slip clutch.
Use “A” dimension in table below
if measurements were not taken
before disassembling slip clutch.
24600