Crossbar Removal - Oregon 480RC Original Instruction Manual

13. Check that the gear backlash is between 0.006" and 0.016".
The backlash can be increased or decreased by adding
or removing gaskets between the input cap and housing.
Once the backlash is correct add RTV silicone to the input
cap face. Install six each bolts (12) and six each washers
(11) to secure input cap assembly.
14. Slide input seal (6) onto input shaft (4) and press into
housing flush with front using a tube of correct diameter.
Be careful not to damage seal lip.
15. Check gearbox housing for leaks by plugging all holes
except one. Apply 4 psi compressed air and immerse the
gearbox in water to verify that there are no leaks.
16. Remove gearbox from water and dry off with compressed
air. With the gearbox placed in the operating position add
SAE 80W of 90W EP oil until it runs out of back level hole
threads. Install level plug and breather plug (24). Tighten all
plugs.

Crossbar Removal

1. It is necessary to gain access to bottom side of cutter for
crossbar removal. See OWNER SERVICE, page 18.
NOTE: You will need to use either the puller screw (Item 6,
Figure 18) or a small hydraulic jack to remove the crossbar.
2. To make crossbar removal easier, remove blades as shown
in Figure 17.
Figure 17. Blade Removal
3. Remove cotter pin and castle nut from bottom of crossbar,
Figure 17.
4. Attach a clevis (1) to each end of crossbar, using blade pins,
spacers, keyhole plates, and blade pin clips.
5. Position tube assembly (5) with threaded nut toward
crossbar for puller screw removal or down for hydraulic
jack removal.
1. Crossbar
2. Blade
3. Blade pin
4. Lock washer
5. 1-1/8 NF Jam nut
DEALER SERVICE
1. Clevis
2. 5/8 NC x 4 Cap screw
3. 5/8 NC Hex nut
4. Pad assembly
5. Tube assembly
6. Screw assembly
7. Puller link
Figure 18. Crossbar Removal
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