MacDon FD75, Operator'S Manual

Page: 41 / 578

214323
23
Revision B
2.2 Specifications
Specifications and design are subject to change without notice or obligation to revise previously sold units.
The following symbol and letters are used in Table 2.1, page 23 and Table 2.2, page 26 :
| FD75 | CA25 | Attachments
S: standard / O
F
: optional (factory installed) / O
D
: optional (dealer installed) /
—
: not available
Table 2.1 Header Specifications
Cutterbar
Effective cutting width (distance between crop divider points)
9.1 m (30 ft.) header 9144 mm (360 in.)
S
10.7 m (35 ft.) header 10668 mm (420 in.)
S
12.2 m (40 ft.) header 12192 mm (480 in.) S
13.7 m (45 ft.) header 13716 mm [540 in.)
S
Cutterbar lift range Varies with combine model
S
Knife
Single-knife drive (all sizes): one hydraulic motor with V-belt to one heavy duty knife drive box.
O
F
Double-knife drive (12.2 and 13.7 m (40 and 45 ft.) only , untimed): two hydraulic motors with V-belts to
two heavy duty knife drive boxes.
O
F
Knife stroke 76 mm (3 in.)
S
Single-knife speed (strokes per minute) 1 9.1 m (30 ft.) 1200
–
1400 spm
S
Single-knife speed (strokes per minute) 1 10.7 m (35 ft.)
1100
–
1300 spm
S
Single-knife speed (strokes per minute) 1 12.2 m (40 ft.) 1050
–
1200 spm
S
Double-knife speed (strokes per minute) 1 12.2 m (40 ft.)
1100
–
1400 spm
S
Double-knife speed (strokes per minute) 1 13.7 m (45 ft.) 1100
–
1400 spm
S
Knife Sections
Over-serrated / solid / bolted / 9 serrations per inch
S
Knife overlap at center (double-knife headers) 3 mm (0.1 in.) S
Guards and Hold-Downs
Guard: pointed / forged / double heat treated (DHT)
Hold-down: sheet metal / adjustment bolt
S
Guard Angle (Cutterbar on Ground)
Center-link retracted 2.0 degrees
S
Center-link extended 7.4 degrees
S
PRODUCT OVERVIEW
1. Under normal cutting conditions, knife speed measured at the knife drive pulley should be set between 600 and
640 rpm (1200 and 1280 spm). If set to low side of chart, you could experience knife stalling.