Pto; Forward-Reverse - Gravely Convertible 7.6 Service Manual

PTO

When internal PTO problems are suspected, remove the
attachment or attachment cover plate and check the shifting
mechanism.
If difficulties are noted, remove the shipper shaftshipper
shaft guide assembly. Carefully check all parts for excessive
wear and/or damage.
Figure 26
To gain access to the Forward-Reverse planetary, remove
the attachment or attachment cover plate, PTO mechanism and
the advance casting.
Rotate the actuating lever and release the planetary system.
Carefully examine all parts for wear, excessive play or
damage.
Before disassembling the planetary, check the fit of the
gears on the pins. If gears appear too tight or too loose,
disassemble the planetary and check the gears and pins for
wear. (NOTE: Bolts have left hand threads) Assembly and
time the planetary as follows:
1. Place the sun pinion in the bore of the front pin plate.
2. Secure the pin plate quill, over the sun pinion, to the pin
plate with 3 –1/4 x 5/8 bolts.
3. Place orbit gear bushing in gears. Do not use old bushing in
new gears or new bushing in old gears.
FORWARD - REVERSE
Figure 2'l
PTO
If nothing abnormal is found, remove the attachment dog
and pinion shaft. Check for wear or damage and check pinion
shaft for twisting.
Check the thrust bushing assembly in the advance casting
for wear or damage.
Carefully reassemble parts in proper sequence. Be sure a
gasket is used under the shipper shaft guide.
4. Mesh the three gears with the sun pinion so that the timing
marks (punch mark on each gear) from an equal-sided
triangle.
5. Secure the reverse idlers to the front pin spacer.
6. Secure the front pin spacer to the front pin plate using the
special bolts.
When replacing this unit in the transmission, mesh the teeth of
the actuating rod and clutch slide rods and slide the unit in
position.
Figure 28
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