New Holland CX720 Operator's Manual page 421

1. Straw elevator chain
The straw elevator chain is factory fitted so there is
a minimal distance between the header auger and the
straw elevator chain to obtain a proper feeding.
IMPORTANT: It is required to check the straw
elevator chain tension within the first 50 hours to
prevent chain damage.
The tension of the straw elevator chain is kept
constant by springs 1 on both sides of the straw
elevator which pulls mounting supports 4 of the lower
shaft forward.
The chain tension is correct:
spring length 1 = indicator plate length 2.
Adjust with nuts 3.
As the chain stretches, the supports will gradually
move towards the end of the slots.
In this case, remove an offset link of the three chains
and readjust the chain tension.
Proceed as follows:
1. Turn the straw elevator chain until the connecting
links of the chains are at the front opening.
2. Loosen nuts 3 (fig. 126) on both sides of the straw
elevator to slacken the straw elevator chain.
3. Move the straw elevator lower shaft to the rear.
4. Remove cotter pins 5 and open chains 6.
5. Remove half a link 7 of each chain.
6. Reassemble chains 6 and install cotter pins 5 in
the right direction and bend the leys of the cotter
pins close to the pen.
7. Readjust the chain tension as described in the
beginning of this paragraph.
4–56
SECTION 4 – LUBRICATION AND MAINTENANCE
126
127