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Owner Service 25
MAN0571 (Rev. 6/15/2007)
Figure 14. Flexible Coupler
FLEXIBLE COUPLER
RUBBER DISK REPLACEMENT
The flexible coupler side drive is designed to flex when
striking heavy objects or during start-up to protect gear-
boxes. The rubber disks will wear out over time and
require replacement much like slip clutch disks. To
maximize rubber disk life, lower tractor engine speed to
an idle when engaging the PTO and avoid striking the
ground with cutter blades.
Periodically inspect the disks for signs of cracking. A
disk may run for some time after a crack starts but this
is the first sign that disk replacement is required in the
future.
To replace the disks, remove hardware items 6, 7, 8,
and 9. Remove sleeves (7) from old disk and install in
new disk. Reassemble and torque bolts to 85 lbs-ft.
See Figure 14. Take special care not to rotate gearbox
shaft and throw blades out of time. If rubber disks have
failed and blades are hitting, you will need to re-time
the blades per instructions on page 35.
SERVICING TIRES SAFELY
Used Aircraft Tires (Figure 15)
Do not attempt to mount a tire unless you have the
proper equipment and experience to perform the job.
Always maintain the correct tire pressure. Do not inflate
tires above the recommended pressure. Never weld or
heat a wheel and tire assembly. The heat can cause an
increase in air pressure and result in a tire explosion.
Welding can structurally weaken or deform the wheel.
When inflating tires, use a clip-on chuck and an exten-
sion hose long enough to allow you to stand to the side
— not in front of or over the tire assembly. Use a safety
cage if available.
Check wheels for low pressure, cuts, bubbles, dam-
aged rims, or missing lug bolts and nuts.
1. Complete drive
2. Inner connector yoke
3. Outer connector yoke 1-3/4 20-spline
5. Rubber disk
6. Shaped washer
7. Bushing, .63 ID
8. Hex head cap screw
9. M16 x 2.0 Lock nut
10. Grease fitting
11. 3/8 NC x 3/4 Square head set screw
WARNING