Gravely 885015 Operator And Parts Manual page 18

CHAIN ADJUSTMENT
To adjust the power brush drive chain:
IMPORTANT: Adjust the chain after the first four hours of
operation and thereafter adjust every 100 operating
hours.
1. Loosen the nut and move the block against the
chain until the chain is straight at the top. DO NOT
OVERTIGHTEN the chain. Tighten the nut. See
figure 22.
Nut
BRUSH REPLACEMENT
To replace the brush element:
1. Disconnect the brush from the unit.
2. Turn the power brush over with the wheels up.
3. Remove the side plate.
4. Remove the connecting link from the chain.
Remove the chain from the sprocket. See figure 23.
Connecting Link
Chain
Block
Figure 22
Chain
Connecting
Link Retainer
Figure 23
5. Remove the bolts from the flangette bearing on
each end of the brush. See figure 24.
6. Remove the brush from the support frame.
7. Loosen the locking collar set screw. Put a punch in
the hole without threads. Hit the punch with a
hammer to turn the locking collar 1/4 turn
counterclockwise.
8. Remove the locking collar and the bearing from the
shaft.
9. Remove the .25 x 2.00 cotter pin and the three
spacers from the shaft. See figure 24.
10. Remove the shaft from the brush.
11. Install the replacement brush on the shaft. Put the
spacers on the shaft and install the .25 x 2.00 cotter
pin.
12. Put the flangette bearing on the shaft with the flat
side toward the brush. Put the locking collar on the
bearing shoulder. DO NOT TIGHTEN THE
LOCKING COLLAR AT THIS TIME.
13. Put the brush in the frame.
14. Fasten the sprocket side flangette bearing to the
support frame first, using the hardware removed in
Step 5.
15. Fasten the opposite flangette bearing to the frame
on the other side.
16. To tighten the locking collar, put a punch in the hole
without the threads. Hit the punch with a hammer,
turning the locking collar clockwise until tight.
17. Put the chain on the sprocket and install the
connecting link and retainer clip.
18. Adjust the chain for tension per the Chain
Tightening instructions.
19. Install the left side plate on the frame using
the.31-18 x.75 hex bolts and nuts.
Brush
Flangett
Element
Bolt
Cotter
Shaft
Pin
Spacers
18
Flangette
Bearing
Set
Screw
Brush Locking Flangette
Shaft Collar
Figure 24
Brush
Frame
Nut