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Section 4: Maintenance & Lubrication
3/17/20
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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 disc and plate are still aligned. A clutch that
has not slipped must be disassembled to separate
the friction disc plates. See
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
cutting and periodically each week. An additional set
of scribe marks can be added to check for slippage.
See Figure 4-7 to adjust spring length.
Clutch Disassembly
Figure 4-6
Clutch Assembly and Disassembly
Disassembly
Refer to Figure 4-6:
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. Refer to the Parts Manual
for a detailed parts breakdown.
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.
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IMPORTANT: Refer to Figure 4-7.
measure and record length (“A”) of each clutch
spring before disassembling the clutch.
Assembly
Refer to Figure 4-6:
Reassemble each friction disc (#4) next to the metal plate
it was separated from. Install bolts (#3) through end
plates and intermediate plates as shown. Place springs
(#2) over bolts (#3) and secure with nuts (#1).
Refer to Figure 4-7:
Progressively tighten each spring retainer bolt until
correct spring height “A” dimension is obtained.
Clutch Adjustment
Figure 4-7
Removing the Cover Plate
Figure 4-8
Driveline Access
Refer to Figure 4-8:
1. To access the driveline bolts, remove 3/8" x 1" bolts
(#2), lock washers (#4), and flat washers (#3), and
cover (#1).
Model
No.
Driveline
No.
Power
Take-Off
Speed
Cat
No.
A (inches)
Spring
Height
GR1525
826-673C
540
4
1.319"
24600
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.
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