Bluebird 968999392, Operator'S Manual

BLUEBIRD

-27

MAIntenAnCe AnD seRVICe

Tine Replacement

Turn off engine and remove weights.

1. 

Fold handle on the 424 and 530 Models.

2. 

Place on workbench (Model 424 only) and chock 

3. 

wheels. Note direction of tine bolt. 

Reinstall the 

bolt facing in the same direction on the Model 
424 to avoid contact with weights.

Remove and replace tines by loosening stop bolt. 

4. 

Remove retaining bolt and old tine, insert new tine 
and fasten with retaining bolt in the same direction 
as it was removed. When all tines are replaced, 
tighten stop bolts.

NOTE: Replace worn lock nuts to insure that bolts will 
hold tines in place.

Tine Shaft Bearing  
Removal and Replacement

Turn off engine and remove weights.

1. 

Remove drive guard cover.

2. 

Fold handle.

3. 

Elevate approximately 4", block and chock rear 

4. 

wheels.
Manually cycle the drive chain for access to 

5. 

master link.
Turn chain idler adjustment screw counter 

6. 

clockwise to loosen the chain.
Remove the master link and free rotor sprocket.

7. 

Remove the tine rotor shaft bearing bolts (4).

8. 

Remove chain scraper bolts (2) and chain scraper 

9. 

(on Model 424 only).
Remove the rotor shaft assembly.

10. 

Remove outer rotor bearing by loosening the set 

11. 

screw in the collar.
Reverse steps to reinstall.

12. 

Refer to sections “Chain Removal and 

13. 

Replacement” and “Adjusting Chain Tension” 
for chain replacement and adjustment of chain 
tension.

Tines

Tine Wear

After the BlueBird Aerator has been used for 
sometime, the tines will wear. When this happens 
aerating performance diminishes. Inspect tines using 
the drawing, replace when at minimum length or 
before. (Tines are 5" when new.)

Unlock collar (best accomplished by using a 

14. 

hammer and pin punch). Insert pin punch into the 
hole next to the set screw and, using the hammer 
and with moderate striking, hit collar so that it 
rotates in the opposite direction the rotor would 
normally turn.
Reverse steps to reinstall.

15. 

Refer to sections “Chain Removal and 

16. 

Replacement” and “Adjusting Chain Tension” 
for chain replacement and adjustment of chain 
tension.

8060-011

Check tines for wear

8060-012

Unlock inner bearing

4

3

/

8

" (11.1 cm)

Minimum