MacDon FD75 OM - Manual (Page 328)

MAINTENANCE AND SERVICING
6.8.9 Knife Drive Box
The knife drive box converts rotational motion into reciprocating motion to the knife. It is belt driven from a hydraulic
motor that is powered by the adapter hydraulic pump.
CAUTION
To avoid personal injury, before servicing machine or opening drive covers, refer to 6.1 Preparation for
Servicing, page 241 .
Mounting Bolts
Check the torque on the four knife drive box mounting bolts (A) and (B) after the first 10 hours operation and
every 100 hours thereafter.
1. Torque side bolts (A) first, then the bottom bolts (B).
Torque to 200 ft·lbf (271 N m).
Figure 6.118: Knife Drive Box
Removing Knife Drive Box
NOTE:
Procedure is the same for both ends of the untimed double knife header.
1. Open endshield. Refer to Opening Endshields, page
35 .
2. Loosen the two bolts (A) that secure the motor
assembly to header endsheet.
3. Loosen the tension on the belt by turning the tensioning
bolt (B) counterclockwise.
Figure 6.119: Knife Drive
169894 314 Revision A