Land Pride Powered Rakes PR1672 - Manual (Page 20)

18
Section 4: Maintenance & Lubrication
PR1660, PR1672 & PR1690 Powered Rakes 314-216M 6/12/13
Table of Contents
Type A Slip Clutch
Follow clutch run-in and assembly instructions below if
your clutch is the Type A shown in Figure 4-5.
Type A Slip Clutch Run-In
Figure 4-5
Clutch Run-In
Refer to Figure 4-5:
1. Make sure the area is clear of all bystanders and
machine is safe to operate.
2. Start tractor and engage PTO drive for 2-3 seconds
to permit slippage of the clutch surfaces. Disengage
PTO, then re-engage a second time for 2-3 seconds.
Disengage PTO, shut off tractor, and remove key.
Wait for all components to stop before dismounting
from tractor.
3. Inspect clutch and ensure that the scribed markings
made on the clutch plates have all 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 on page 18.
4. Allow clutch to cool to ambient temperature and
tighten each of the 8 spring retainer nuts on the
clutch housing exactly 2 revolutions to restore clutch
to original setting pressure.
5. Clutch is now ready for use.
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 Figure 4-7 on page 18 to adjust spring
length.
Clutch Disassembly, Inspection & Assembly
Refer to Figure 4-6:
If clutch run-in indicated that one or more of the friction
disks did not slip, then the clutch must be disassembled to
separate parts.
1. Allow clutch to cool to ambient temperature before
disassembling it.
2. Remove spring retainer nuts (#9a), springs (#2), and
bolts (#9b) from the assembly.
3. Each friction disk (#5) must then be separated from
the metal surface adjacent to it.
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4. Inspect all parts for excessive wear and condition.
Clean all parts that do not require replacement.
•
The original disk thickness is 1/8" and should be
replaced if thickness falls below 3/32".
•
If the clutch has slipped to the point of “smoking”,
the friction disks may be damaged and should be
replaced. Heat build-up may also affect the yoke
joints.
Type A Slip Clutch Assembly
Figure 4-6
5. Reassemble each friction disk (#5) next to the metal
plate it was separated from.
6. Make certain bushing #4 is positioned as shown.
Install bolts (#9b) through the end plates and
intermediate plates as shown.
7. Place springs (#2) over the bolts and secure with
nuts (#9a).
Refer to Figure 4-7:
8. Progressively tighten each spring retainer bolt until
correct compressed spring length “A” is reached.
•
A = 1.26"
Type A Slip Clutch Adjustment
Figure 4-7
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