MacDon M105 Operator's Manual page 136

If the header is not level, perform the following checks prior to adjusting the levelling linkages.
NOTE:
The float springs are NOT used to level the header.
• Raise header to full height, and keep HEADER UP switch pressed to ensure lift cylinders are phased.
• Check drive wheel tire pressures.
• Check and set float adjustment. Refer to
To level the header, follow these steps:
1. Place float pins in locked out location (A).
2. Park windrower on level ground.
3. Set header approximately 6 in. (150 mm) off ground
and check that member (A) is against link (B). Note the
high and low end of header.
4. Place wooden blocks under header cutterbar and legs.
169890
OPERATION
Checking Float, page 120.
Figure 4.65: Float Pins
Figure 4.66: Lift Linkage
122
Revision A