Woods BRUSHBULL BB48XE Manuel D'utilisation page 14

BLADE SERVICING
Blade Removal (Figure 13)
NOTICE
■
If blade pin is seized in crossbar and extreme force will be needed to
remove it, support crossbar from below to prevent gearbox damage.
8. Crossbar
9. Blade
12. Blade pin
13. Shim
14. Keyhole plate
15. Blade pin lock clip
16. Shim
35. Cap screw
Figure 13.
1.
Disconnect driveline from tractor PTO.
2.
Raise cutter and block securely (see Figure 12).
3.
Align crossbar (8) with blade access hole in the cutter frame. Remove
cap screw, blade pin lock clip, keyhole plate, and shims. Carefully drive
pin out of crossbar.
4.
Rotate crossbar (8) and repeat for opposite blade.
Blade Installation (Figure 13)

Your dealer can supply genuine replacement blades. Substitute
blades may not meet original equipment specifications and may be dan-
gerous.
■
Crossbar rotation is counterclockwise when looking down on cutter.
Be sure to install blade cutting edge to lead in counterclockwise rotation.
NOTICE
■
Always replace or sharpen both blades at the same time.
1.
Inspect blade pin (12) for nicks or gouges, and if you find any, replace the
blade pin.
2.
Insert blade pin through the blade (9). Blade should swivel on blade pin; if
it doesn't, determine the cause and correct.
3.
Align crossbar (8) with blade access hole in cutter frame. Apply a liberal
®
coating of NeverSeez or equivalent to blade pin and crossbar hole.
Make sure blade offset is away from cutter. Push blade pin through
crossbar. Pin should rotate freely prior to installing blade clip (15).
4.
Install shims (13 & 16) over blade pin.
NOTE:
Only use enough shims to allow keyhole plate (14) to slide into
blade pin groove.
5.
Install blade clip (15) over keyhole plate and into blade pin groove.
6.
Secure into position with cap screw (35). Torque cap screw to 115 N-m
(85 lbs-ft).
7.
Repeat steps for opposite side.
NOTE:
Blade should be snug but should swivel on pin without having
to exert excessive force. Keep any spacers not used in the installation as
replacements or for future installation.
14 Owner Service
Blade Assembly
Blade Sharpening
NOTICE
■
When sharpening blades, grind the same amount on each
blade to maintain balance. Replace blades in pairs. Unbalanced
blades will cause excessive vibration, which can damage gear-
box bearings. Vibration may also cause structural cracks to cut-
ter.
1.
Sharpen both blades at the same time to maintain balance. Follow
original sharpening pattern.
2.
Do not sharpen blade to a razor edge—leave at least a 1.59 mm (1/16")
blunt edge.
3.
Do not sharpen back side of blade.
Figure 14
SLIP CLUTCH ADJUSTMENT (Figure 15)
The slip clutch is designed to slip so that the gearbox and driveline are pro-
tected if the cutter strikes an obstruction.
A new slip clutch or one that has been in storage over the winter may seize.
Before operating the cutter, make sure it will slip by performing the following
operation:
Comer (BB48XE, BB60XE, BB72XE Only)
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". 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 setting of 32.0 mm (1.26") is reached as shown in Figure 15.
10.
If excessive slippage continues, check lining plates for excessive wear.
They are 3.18 mm (1/8") thick when new and should be replaced after .79
mm (1/32") of wear to ensure proper operation.
Walterscheid (BB84XE Only)
1.
Turn off tractor engine and remove key.
2.
Remove driveline from tractor PTO.
3.
Loosen six 10 mm cap screws (6) to remove all tension from Belleville
spring plate (5).
4.
Hold clutch hub (3) solid and turn shaft to make sure clutch slips.
5.
If clutch does not slip freely, disassemble and clean the thrust plate faces
(4), flange yoke (1), and clutch hub (3).
6.
Reassemble clutch.
. Blade Sharpening
MAN1254 (3/16/2018)