MacDon FD75 OM - Manual (Page 317)

MAINTENANCE AND SERVICING
2. Using a flat-ended tool with approximately the same
diameter as pin (A). Tap the seal (B), bearing (C), plug
(D), and O-ring (E) from the underside of the knifehead.
NOTE:
Seal (B) can be replaced without removing the
bearing.
When changing seal, check pin and
needle bearing for wear. Replace if necessary.
Figure 6.95: Removing Bearing
A - Flat-ended tool B - Seal C - Bearing
D - Plug E - O-ring
6.8.4 Installing Knifehead Bearing
To install the knifehead bearing, follow these steps:
1. Place O-ring (E) and plug (D) in knifehead.
IMPORTANT:
Install the bearing with the stamped end (the end
with identification markings) facing up.
2. Using a flat-ended tool (A) with approximately the same
diameter as the bearing (C), push the bearing into the
knifehead until the top of the bearing is flush with the
step in knifehead.
3. Install seal (B) into the knifehead with the lip
facing outwards.
IMPORTANT:
To avoid premature knifehead or knife drive box
failure, be sure there is no looseness in the fit of
the knifehead pin and the needle bearing, and the
fit of the knifehead pin and output arm.
4. Install knife. Refer to 6.8.5 Installing Knife, page 303 .
Figure 6.96: Knifehead
A - Flat-Ended Tool B - Seal C - Bearing
D - Plug E - O-ring
6.8.5 Installing Knife
WARNING
Stand to rear of knife during installation to reduce risk of injury from cutting edges. Wear heavy gloves
when handling knife.
169894 303 Revision A