Great Plains 2525F Operator Manual - Manual (Page 54)

50 2020F, 2025F, 2520F and 2525F
118-232M 01/23/2012
Drive System Maintenance
Refer to Figure 62
For proper operation and to prevent downtime and repair,
keep drive chains properly adjusted and lubricated. Reg-
ularly check drive chains for excess slack and wear.
Adjust idlers to remove any excess slack from chains.
Note: Be sure chain is installed with the chain connector
link retainer facing out for ease of access and in-
spection, and the clip opening (split end) facing the
opposite direction of chain travel.
Chain Maintenance
Inspect and lubricate chains regularly. The slack of new
chains tends to increase during the first few hours of
operation due to seating.
Chain Slack
Check slack within the first 8 hours of operation and
tighten idlers as necessary.
Refer to Figure 63, which, for clarity, greatly exaggerates
slack, and omits the idlers.
1.
Measure the span for allowable slack:
Locate the longest span of each chain (usually the
span which does not run through the idlers).
2. Determine the ideal slack:
Long chains (over 36in/91cm):
1 ⁄
4
in per foot
Vertical short chains: 1 ⁄
4
in per foot (2.1cm/m)
Horizontal short chains: 1 ⁄
2
in per foot (4.2cm/m).
3. Measure the current slack :
Acting at a right angle to the chain span at the center
of the span, deflect the chain in both directions. The
slack is the distance of the movement.
4. Adjust the idlers for ideal slack.
Whenever mounting a chain, make sure the clip at the
removable link is oriented to minimize snags.
Refer to Figure 64 (arrow shows chain direction)
Install clip with open end facing away from direction of
chain travel (shown by gray or striped arrows in chain
routing diagrams).
FigureSpacer
Figure 62
Drive Chains
26251
FigureSpacer
Figure 63
Measuring Chain Slack
27264
2
1
1
FigureSpacer
Figure 64
Chain Clip Orientation
26482
2