Seal Repair - Oregon 480RC Original Instruction Manual

Seal Repair

(Figure 16)
Vertical Shaft Seal Repair
1. Disconnect and remove the rear driveline from the
gearbox.
2. Remove vent plug (24) and siphon gear lube from housing
through this opening.
3. Remove crossbar (see Crossbar Removal, page 27).
4. Remove output cap (16) and output seal (13) by removing
four cap screws (12) and washers (11). Replace with new
seal (see Seal Installation, page 24).
Vertical seal should be recessed in output cap.
NOTE: Distortion to seal cage or damage to seal lip will
cause seal to leak.
5. Secure output cap (16) on to bottom of gearbox using four
cap screws (12) and lock washers (11).
NOTE: Make sure output gasket (17) and (18) are in place.
Figure 16. Cast/Crown Top Gearbox Assembly
6. Fill gearbox with SAE 80W or 90W gear lube until it runs
out the side level plug.
7. Remove and replace any seal damaged in installation.
Horizontal Shaft Seal Repair
1. Disconnect and remove the rear driveline from the
gearbox.
2. Remove vent plug (24) and siphon gear lube from housing
through this opening.
3. Remove input cap (2) and input seal (6) by removing six cap
screws(12) and washers (11). Replace with new seal (refer
to Seal Installation, page 24).
NOTE: Distortion to seal cage or damage to seal lip will
cause seal to leak.
4. Secure input cap (2) on to front of gearbox using six cap
screws (12) and washers (11).
NOTE: Make sure input gasket (8) and (9) are in place.
5. Fill gearbox with SAE 80W or 90W gear lube until it runs
out the side level plug.
1. Housing
2. Input cap
3. Ball bearing
4. Input seal
5. Retaining ring
6. Input seal
7. Retaining ring
8. Input gasket (0.30 mm)
9. Input gasket (0.13 mm)
10. Bearing spacer
11. M10 Lock washer
12. M10 x 1.5 x 25 Cap screw
13. Output seal
14. 1" - 14 Slotted flange nut
15. Cotter pin
16. Output cap
17. Output gasket (0.30 mm)
18. Output gasket (0.13 mm)
19. Shim kit
20. Output gear
21. Ball bearing
22. Retaining ring
23. Input gear
24. Vent plug
DEALER SERVICE
25