Checking And Adjusting Knife Hold-Downs; Checking Pointed Guard Hold-Downs - MacDon FFT FD75 Assembly Instructions Manual

4.7 Checking and Adjusting Knife Hold-Downs

NOTE:
Align guards prior to checking and adjusting hold-downs. Refer to
Refer to following procedures:
•
4.7.1 Checking Pointed Guard Hold-Downs, page 95

4.7.1 Checking Pointed Guard Hold-Downs

This procedure is applicable to headers with pointed guards.
1. Check guard alignment and adjust as required. Refer to
Measure clearance between hold-downs and knife sections as follows:
WARNING
To avoid bodily injury or death from unexpected startup
of machine, always stop engine and remove key before
making adjustments to machine.
2. Shut down combine, and remove key from ignition.
3. Manually stroke knife to locate section (A) under hold-
down (B).
4. At standard guard locations, push knife section (A)
down against guard (C) and measure clearance
between hold-down (B) and knife section (A) with a
feeler gauge. The clearance should be 0.1–0.6 mm
(0.004–0.024 in.).
5. If necessary, refer to
Downs, page 96.
Double-knife:
6. Manually stroke knife to locate sections (A) and (C)
under center hold-down (B).
7. Measure between knife sections (A) and (C) with a
feeler gauge. The clearances should be as follows:
•
At tip of hold-down: 0.1–0.4 mm (0.004–0.016 in.)
•
At rear of hold-down: 0.1–1.0 mm (0.004–0.040 in.)
8. If necessary, refer to
Knife Center Pointed Guard, page
214325
PERFORMING PREDELIVERY CHECKS
Adjusting Pointed Guard Hold-
Adjusting Hold-Down at Double-
96.
6.1.1 Adjusting Knife and Guards, page
6.1.1 Adjusting Knife and Guards, page
Figure 4.9: Normal Guard Hold-Down
Figure 4.10: Double-Knife Center Guard
Hold-Down
95
276.
276.
Revision A