Hi grumpy....this might prove of interest to you....taken directly from the John Deere site...

Special Feeler Gauges

Feeler gauges are used to accurately set the cutting cylinder to bedknife clearance on cylinder mowers. This adjustment is vital to ensure a good quality of cut. Also, if the two parts are set too close then they will make contact, leading to rapid wear of the bedknife and cutting cylinder and overloading the drive system. These special feeler gauges can help prevent injury to the operator. The feeler gauges are 30cm long, so hands and fingers can be kept away from cutting surfaces. The length also aids access for hard to reach places. Two thicknesses of feeler gauge are available � 0.001� and 0.002� � to help operators adjust John Deere cutting cylinders as recommended in the operator�s manual.

Part numbers: [Linked Image]

Special feeler gauges
KJD10551: 0.001� (one thou) feeler gauge. Used for setting up cylinder to bed knife clearance on greens mowers and 22M type units.
KJD10552: 0.002� (two thou) feeler gauge. Used for setting up cylinder to bed knife clearance on John Deere ESP cylinders.
Just food for thought, mate. grin
cheers2



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