Chapter 4: Assembling Header; Preparing Header While In Standing Position; Checking And Adjusting Minimum Snapping Roll Knife Clearance - MacDon C Series Unloading And Assembly Instructions

Chapter 4: Assembling Header

Follow these procedures when preparing a C Series Corn Header for field use.

4.1 Preparing Header While in Standing Position

Some assembly tasks are best done before lowering the header into field position.
1. Ensure that the assembly area is flat and free of rocks or debris that could damage the header. If necessary, move the
header to a more suitable location.
2. Remove the wooden crate from the header shipping stand and set it aside.

4.1.1 Checking and Adjusting Minimum Snapping Roll Knife Clearance

There is a snapping unit assembly between each pair of snouts, and each assembly contains two snapping rolls with
attached knives. The clearance between those knives should be checked, and if necessary adjusted, before lowering the
header into field position.
CAUTION
Wear heavy gloves when working around or handling knives.
CAUTION
Ensure hands are clear when rotating snapping rolls. When you rotate one, others will rotate as well.
1. There is a pair of snapping rolls in each row. Rotate
snapping rolls (A) and check the clearance between each
pair. There should be a 1–2 mm (0.04–0.08 in.) gap (B)
between opposing sharp knives.
NOTE:
If the header is equipped with a stalk chopper, you can
rotate the snapping rolls by hand by turning the chopper
assembly. If the header is not equipped with a stalk
chopper, use a 32 mm wrench to turn the input hex shaft.
262362
A
Figure 4.1: Snapping Roll Knife Clearance
17
B
A
Revision A