MacDon D65 Operator's Manual page 185

3. Tension the knife drive belt. For instructions, refer to
Tensioning Untimed Knife Drive Belts, page
4. Install access cover (A) and secure it with a bolt.
5. Close the endshield. For instructions, refer to
Endshield, page 36.
Tensioning Untimed Knife Drive Belts
The procedure for tensioning untimed knife drive belts is the same for single- and double-knife headers.
DANGER
To prevent bodily injury or death from the unexpected start-up or fall of a raised machine, always stop the engine and
remove the key before leaving the operator's seat, and always engage the safety props before going under the
machine for any reason.
IMPORTANT:
To prolong belt and drive life, do NOT overtighten the belt.
1. Shut down the engine, and remove the key from the
ignition.
2. Open the endshield. For instructions, refer to
Endshield, page 35.
3. Loosen two bolts (A) securing the motor assembly to the
header endsheet.
4. Turn adjuster bolt (B) clockwise to move drive the motor
until a force of 89 N (20 lbf) deflects belt (C) 20–25 mm
(3/4–1 in.) at the midspan.
214327
MAINTENANCE AND SERVICING
165.
Closing
Figure 5.77: Access Cover
Opening
Figure 5.78: Untimed Knife Drive
165
A
B
A
C
Revision B