User Guide

ManualsBrandsWoods Equipment ManualsOtherBB840X

22 Owner Service

MAN0654 (Rev. 10/19/2007)

3. Align crossbar assembly (3) with blade access hole

in cutter frame. Apply a liberal coating of Never

Seez

or equivalent to blade pin and crossbar

hole. Make sure blade offset is away from cutter.

4. Insert blade pin (1) through blade. Push blade pin

through crossbar.

5. Install shims (4 & 5) over blade pin.

NOTE: Only use enough shims to allow keyhole

plate (6) to slide into blade pin groove.

6. Install blade clip (7) over keyhole plate and into

blade pin groove.

7. Secure into position with cap screw (8). Torque cap

screw to 85 lbs-ft.

8. 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 replace-

ments or for future installation.

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

gearbox bearings. Vibration may also cause struc-

tural cracks to cutter.

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 1/16" blunt edge.

3. Do not sharpen back side of blade.

Figure 13. Blade Sharpening

SLIP CLUTCH ADJUSTMENT

Mounted Cutters & BB840XP S/N 1127329

& Above (Figure 14)

The slip clutch is designed to slip so that the gearbox

and driveline are protected 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:

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.

7. Tighten Belleville spring (5) until it is against the

thrust plate (4) of the clutch, and then back off each

of the six nuts by 2 full revolutions. The gap

between Belleville spring and thrust plate should

be 1/8" as shown in Figure 14.

8. If a clutch continues to slip when the spring is

compressed to 1/8" cap, check friction discs (2) for

excessive wear. Discs are 1/8" when new. Replace

discs after 1/16" wear. Minimum disc thickness is

1/16"