Backlapping
Backlapping is a very important step in maintaining sharp reel blades on the mower. This procedure should be performed when the reel blades and bed knife become slightly rounded and the turf is not cut cleanly after a slight bed knife adjustment. Also, after grinding the bed knife and reel, backlapping should be done to establish a perfect match between the be knife and the reel blades. The reel must run in a reverse direction to be backlapped.
1.Make sure to adjust the reel to the bed knife so that the reel is level with the bed knife and light contact is maintained.
2.Remove the Right Side Guard (24, Fig. A).
3.Raise the mower up off the ground until the rear roller clears the ground as shown in Figure D.
4.Loosen Hex Nut (25, Fig. C) on the back lap assembly, pivot assembly rearward and tighten hex nut as shown in Figure D.
5.Start engine and run at half throttle. Engage drive clutch.
6.With reel running, apply lapping compound to the reel with a 2” or 3” brush. Apply compound evenly to the moving blades.
Be extremely careful not to let the brush, your fingers or your clothing get caught in the reel. Use approved safety glasses and gloves to protect you from flying particles and abrasives.
Many types of compounds are available for lapping. We recommend a good
7.Stop the reel and examine both the bed knife and reel blades to see that the cutting edges uniformly sharp. If not, gradually tighten reel adjuster bolts (see Reel To Bed Knife Adjustment) and then repeat Step 6 above until achieving the proper sharpness.
8.Rinse off the compound thoroughly with water to removeallabrasive.
9.Loosen the hex nut on the backlap assembly and pivot assembly forward to disengage rear roller. Tighten nut in the position shown in Figure E.
10.Lower machine to the ground and replace right side guard.
Backlapping gears are shown engaged. The gears must be in thispositionwhenbacklapping.
FIGURE D
Raise mower up until drive roller clears the ground.
Backlapping gears are shown disengaged. The gears must be in this position when mowing.
FIGURE E
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