MacDon 963 Harvest Header - Manual (Page 48)

47
MAINTENANCE/SERVICE
Wobble Box Assembly/Disassembly
When reinstalling drive arm or pulley:
1. Remove any rust or paint from inner
spline. For replacement parts, remove
oil/grease with degreasing agent.
2. Before assembly, apply Loctite® #243
adhesive (or equivalent) to spline. Apply
in two bands (C) as shown, with one
band at end of spline and one band
approximately mid-way.
DRAPERS
Draper Tension Adjustment
Draper tension should be just enough to prevent slipping.
Spring assemblies at each outboard roller control draper tension. Set draper tension as follows:
1. Check that draper guide (A) is properly
engaged in grooves of both drive and idler
rollers.
2. Loosen locknut (B) and slide bracket (C)
away from outboard roller as far as hand
force allows.
NOTE: It may be necessary to tap bracket
(C) with a hammer to start it moving.
3. Tighten locknut (B) to secure the new position.
4. Turn bolt head (D) clockwise until gap (E) between idler spring coils is 1/16 inch (1.5 mm).
IMPORTANT: Do not over-tighten draper so that spring is completely collapsed (no gap between coils).
Operating with spring collapsed may lead to failure of draper, draper rollers and/or tightener components.
Replacing Drapers
When installing drapers:
1. Ensure you have the proper length draper.
2. Adjust draper opening. See page 21.
3. Install screws (C) with heads facing center opening.
Moving Draper Motors
Draper drive motors may be moved from outboard to inboard and vice versa. The inboard configuration
provides more conveying torque in heavy crops and is for windrowing applications only. The maximum delivery
opening is recommended with motors inboard.
In combine applications motors must be in outboard configuration because of interference with adapter
conveyors.
For instructions on moving draper motors, see "Assembly" section, page 75.