Assembly, Preparing the adapter (cont’d.) – MacDon 873 Combine Adapter User Manual

Page 42

Form # 147069

Issue 09/06

CHANGE FLOAT SPRING PIN POSITION

972 HEADER ONLY (without rubber isolators)

ASSEMBLY

Preparing the Adapter (cont’d.)

3. For 21’ & 25’ headers, float may be excessive

even at the heaviest setting. It is recommended
to remove the inner spring from the outer float
spring assembly on each side as follows:
• Note the length of exposed thread on spring

drawbolt (B).

• Loosen jam nut (A).
• Loosen spring drawbolt (B).
• Remove lower pin from spring assembly.
• Remove spring drawbolt (B).
• Remove upper spring insert, inner spring

and insert at (C).

• Replace upper spring insert with insert (D)

(with threaded hole). Order #24322.

• Reassemble float spring and install float

lockout pin as below.

• Tighten float spring bolt to original exposed

thread setting.

NOTE: If float is still too light after removing
spring from the two outer assemblies, repeat
procedure for the inner spring assembly, both
sides. Two more of item (D) spring insert
#24322 will be required.

4. The adapter float spring lower pins and float lockout

pins have been shipped in position (G) and (J)
respectively (except export headers), to properly
orient legs for driving into model 963, 973 or 974
Headers.

For 972 Headers only:
NOTE: It is highly recommended that the upgrade
package for rubber isolated linkage pockets be
added to 972 header legs. If this package is not
installed, prior to attaching to header, perform the
following additional adjustments in addition to the
adjustments made per page 39:
• Loosen off float spring bolts after taking note of

original exposed thread length.

• Move lower pins to position (H).
• Move float lockout pins to position (K).
• Repeat at other side.
• Tighten float spring bolts to original exposed

thread setting.
NOTE: This higher position (H) of lower float
pins may cause interference between RTD and
feed draper. Move RTD to a higher position as
described on page 45.

DOUBLE SPRING

ASSEMBLIES

(AS SHIPPED)

MODIFIED

21’ & 25’ SPRING

ASSEMBLIES

REMOVE

MOVE FLOAT LOCKOUT PINS

972 HEADER ONLY (without rubber isolators)