Oregon 480RT Original Instruction Manual page 20

OWNER SERVICE
Driveline Lubrication
1. Lubricate the driveline slip joint every 8 hours of operation.
Failure to maintain proper lubrication could result in
damage to u-joints, gearbox, and driveline.
2. Lower tiller to ground, disconnect driveline from tractor
PTO shaft, and slide halves apart. Do not disconnect the
halves from each other.
3. Apply a bead of grease completely around male half where
it meets female half. Slide drive halves over each other
several times to distribute grease.
4. Apply one pump of grease to each driveline u-joint grease
fitting.
5. Apply one pump of grease to each of the plastic driveline
shield bearings.
GEARBOX FLUID
BEARING
Location Frequency
Driveline Bearings 8 hours
Rotor Bearing 8 hours
Input Gearbox Check Daily
Side Drive Gearbox Check Daily
Figure 14. Lubrication Points
20
SIDE DRIVE FLUID
DRIVELINE BEARING
DRIVELINE BEARING
Slip Clutch Adjustment
1. Turn off tractor engine and remove key.
2. Loosen nuts on springs until the springs can rotate freely,
yet remain secure on the bolts.
3. Mark outer plates of slip-disc clutch as shown in
Figure 15.
4. Securely attach implement to the tractor and start
the tractor.
5. Engage PTO for several seconds then quickly
disengage it.
6. Turn tractor off and remove key.
7. The friction lining plates should have "slipped", or moved.
Check the marks placed on the outer plates of the slip-disc
clutch in step 3 to make sure this is the case.
8. If clutch does not slip, check assembly for oil, grease and
debris. Clean if necessary.
9. Reassemble clutch and tighten bolts no more than 1/8 of a
turn at a time until desired compressed spring length.
10. If excessive slippage continues, check lining plates for
excessive wear. They are .12" thick for the 480RT tiller and
.14" thick for the 600RT and 720RT tillers. They should be
replaced when there is only .05" thickness left to ensure
proper operation.
1.180"
Tiller Model Dim. "A"
480RT 1.210"
600RT & 720RT 1.180"
Figure 15. Slip Clutch Adjustment
Outer plates
Mark line
across clutch
7.10"
Dim. "B"
6.3"
7.1"