Black & Decker MM675 Maintenance, Discharging, Cleaning and Storage, Preventing Corrosion

•Set mower at highest cutting height when mowing in rough ground or in tall weeds.

•Do not cut the lawn when it is wet. Wet grass tends to form clumps with the mulching action. The best time to cut your lawn is in the afternoon.

•For best results, adjust the mower cutting height so that the mower cuts off only the top third of the grass blades.

•If your lawn is overgrown it may be necessary to increase the cutting height to reduce the pushing effect and prevent overloading the motor.

•For extremely heavy mulching make narrower cuts and mow slowly.

•Change your cutting pattern from week to week. Mow north to south one week and east to west the next week. This will help prevent matting and graining of the lawn.

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CAUTION: Do not attempt to unclog the blade chamber by dropping or tapping the mower on the ground. This can damage the mower.

DISCHARGING

The mower is designed to disperse the clippings back to the lawn.

1.Discharging may be necessary if the grass fills the optional bag too quickly.

2.Clippings may be further dispersed, if needed, by blowing them with a yard blower.

3.In heavy grass conditions, a narrower pass may be required

OPTIONAL GRASS BAG (AVAILABLE AS AN OPTION AT EXTRA COST)

It is recommended to bag the clippings for the first few spring mowings and the last mowing of the season to discourage diseases.

1.Bagging the clipping is sometimes preferred to reduce tracking of clippings into pools, hot tubs, and homes.

2.Clippings can be added to your compost bin and used later for a natural fertilizer.

MAINTENANCE

Before each mowing session unplug the mower and ensure that the blade has stopped. Check all nuts, bolts and screws to ensure proper tightness, Be sure to check the blade fastening system. IMPORTANT: To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustment should be performed by authorized service centers or other qualified service organizations. Use only identical replacement parts.

Inspect and thoroughly clean your mower at the beginning of each mowing season for longer life and better performance.

From time to time turn the mower off and wait for the blade to stop. Then unplug the power cord and turn the mower on its side. Using an object such as a stick or rag, wipe out any accumulation of grass in the blade area. Also clean out any grass or debris which may be packed around the discharge/mulch door area. Be careful of the sharp edges of the blade.

REMOVING AND INSTALLING BLADE (FIGURE 10,11,12)

1.RELEASE SWITCH LEVER TO TURN MOWER OFF, WAIT FOR THE BLADE TO STOP, AND UNPLUG MOWER. THEN TURN THE MOWER OVER FOR ACCESS TO THE BLADE.

2.Use a piece of 2x4 wood (about 2 feet long) to keep blade from turning while removing flange nut.

3.Wear gloves and proper eye protection. Be careful of sharp edges of blade. Position wood and remove flange nut as shown in Figure 10.

4.Remove square metal blade spacer, square plastic blade insulator, and blade (Figure 11). Examine blade insulator for damage and replace if necessary.

5.When replacing sharpened or new blade on shoulder of fan, make sure the “GRASS SIDE” on the blade will be facing the ground when the mower is returned to its normal upright position. After installing blade, place blade insulator on blade such that the raised lips on one side engage the edges of the blade. Then install the blade spacer so that it sits inside the raised lips on the other side of the blade insulator. Be sure to align the flats in the hole of the blade spacer with the flats of the shaft, rotating the blade and blade insulator together as necessary. Position piece of wood to keep blade from turning (Figure 12). Install flange nut with the flange against the blade spacer and securely tighten.

10	11 B	A
		12
	C

D

CLEANING AND STORAGE

DANGER: Be sure the mower is unplugged and the blade has stopped.

Remove and clean any debris from the outside of the mower and inside of guard before storage. Store under cover. See MAINTENANCE section.

Cleaning out the underside of the mower is done easiest immediately after mowing (ENSURE MOWER IS UNPLUGGED AND BLADE HAS STOPPED). A rag, crumpled newspaper or paper towels, can be used to wipe out caked clippings. Be careful of sharp edges of blade. A clean mowing deck improves the efficiency of the blade and maintains high performance. When cleaning, DO NOT immerse mower in water or squirt it with a hose or pressure washer. Use only mild soap and damp cloth to clean the mower. Never let any liquid get inside the mower; never immerse any part of the mower into a liquid.

NOTE: Do not store the mower on or adjacent to fertilizers or chemicals.

Such storage can cause rapid corrosion to metal parts.

PREVENTING CORROSION

Fertilizers and other garden chemicals contain agents that greatly accelerate the corrosion of metals. If you use the mower in areas where fertilizers or chemicals have been used, the mower should be cleaned immediately afterwards.

Wipe all exposed parts with a damp cloth. You may lubricate only metal parts with a light petroleum based oil. Do not lubricate wheels.

Fig. 11 A. nut, B. spacer, C. insulator, D. blade

SHARPENING AND BALANCING THE BLADE: (FIGURE 13,14)

1.BE SURE THE SWITCH LEVER IS RELEASED AND THE BLADE HAS STOPPED AND THE CORD UNPLUGGED BEFORE REMOVING THE BLADE.

2.At all times be careful of sharp edges of blade.

3.Remove blade from mower. See instructions for removing and installing blade.

4.Secure blade in a vise as shown in Figure 13.

5.Wear proper eye protection and be careful not to cut yourself.

6.Carefully file the cutting edges of the blade with a fine tooth file or sharpening stone, maintaining the original cutting angle.

7.Check balance of blade by placing center hole in blade over a nail or round shank screwdriver, clamped horizontally in a vise. If either end of the blade rotates down, file off additional material from that end. Blade is properly balanced when neither end drops.

(Figure 14)

8.Replace blade on mower and tighten securely.

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