Black+Decker 20V Max 10″ Chainsaw

Safety

The Black+Decker LCS1020 is compact, but it is still a chainsaw with exposed cutters, kickback risk, and a moving chain near the front hand. Read the host manual, wear full cutting protection, and keep both hands on the saw whenever the chain is moving. Do not cut above shoulder height or use the bar nose to start a cut.

• Wear eye and face protection, hearing protection, gloves, long pants, and cut-resistant footwear.
• Remove the 20V Max battery before tensioning, oiling, cleaning, or transporting.
• Keep the chain brake or hand guard area clear of chips.
• Use only chain oil in the reservoir; do not run the chain dry.
• Avoid dirt, nails, wire, and frozen soil at the end of cuts.

Stop if the chain derails, cuts crooked, smokes, or requires heavy pressure.

Unboxing & first run

Unpack the saw, bar, chain if separate, scabbard, charger, battery if included, and oiling accessories. Confirm the chain specification before installation: 3/8″ LP, .043″ gauge, and 40DL for the 10″ bar. The cutting edges must face forward along the top of the bar.

Before the first run, fill the oil reservoir, set chain tension, install the battery, and run the saw briefly while pointing the bar tip toward clean cardboard or scrap wood. A light oil trace should appear. Make several small cuts in clean dry wood, then remove the battery and recheck tension. New chains stretch slightly as the drive links seat into the bar groove.

• Voltage: 20V Max
• Bar length: 10″
• Chain: 3/8″ LP, .043″
• Drive links: 40DL
• Weight without battery: 7.2 lb

Controls layout

The LCS1020 uses a rear handle with trigger and lock-off, a front wrap handle, battery socket, front hand guard, guide bar, chain, side cover, tensioning hardware, and oil reservoir. Keep the front hand on the wrap handle so the saw stays controlled if the chain catches or exits the cut suddenly.

The chain travels forward along the top of the bar and returns underneath. The oil cap and viewing window, if fitted, should be checked before every cutting session. The side cover holds the bar and protects the drive sprocket; it must be seated correctly before tension is finalized. The scabbard is not just packaging. Use it whenever the saw is stored or carried.

• Rear handle: trigger, lock-off, and battery interface.
• Front area: wrap handle and hand guard.
• Cutting set: 10″ bar, chain, sprocket, and tensioner.
• Lubrication: oil tank, cap, and feed path.

Routine maintenance

Routine maintenance is simple but frequent. Remove the battery, let the chain cool, and brush chips from the side cover, sprocket pocket, bar groove, and oil hole after each use. A compact saw has less room for chips to clear, so buildup can quickly affect oiling and tension.

Check chain tension before cutting and again after the first few cuts. The chain should sit against the lower bar rail without sagging, yet still pull around the bar by gloved hand. Inspect the bar rails for burrs, the tip area for packed chips, and the drive links for damage. Top off bar oil often; a small reservoir can empty faster than expected during limbing.

• Store with the battery removed and scabbard installed.
• Use bar-and-chain oil, not mixed fuel or engine oil.
• Clean battery rails and charger contacts dry.
• Replace damaged chains immediately.

Blade or chain replacement

Replace the chain when cutters are too short to file, drive links are burred, tie straps are cracked, or stretch exceeds the tensioner’s range. Remove the 20V Max battery, loosen the side cover, back off the tensioner, and lift the old chain from the bar and sprocket. Clean the bar groove before installing the new loop.

Fit the chain over the drive sprocket and into the bar groove with cutters facing forward on the top run. Seat all 40DL drive links, reinstall the cover, and tighten gradually while adjusting tension. Pull the chain around the bar by gloved hand before installing the battery. If it binds, remove it and find the cause rather than forcing the motor.

• Required chain: 3/8″ LP, .043″, 40DL.
• Match the 10″ bar groove to .043″ gauge.
• Recheck tension after the first short cut.

Sharpening or cleaning

Sharpen when the saw makes dust instead of chips, pulls to one side, smokes with adequate oil, or needs pressure to advance. Remove the battery and secure the bar before filing. Use the file size and guide specified for this low-profile chain family, keep the guide level, and make the same number of strokes on each cutter unless correcting visible damage.

Clean before and after sharpening. Resin and dirt load the file and hide cracks. Brush the chain, bar groove, oil port, sprocket area, and side cover. If the bar rails have light burrs, dress them carefully with a flat file while preserving the rail faces. Do not lower depth gauges without the proper gauge tool; over-lowered rakers make a small saw grabby.

• File from inside to outside.
• Keep left and right cutter lengths even.
• Oil the chain before storage.
• Replace overheated or cracked chains.

Troubleshooting

Troubleshoot with the battery removed unless a running check is specifically required. Chain, oiling, and battery issues often look similar under load, so inspect the cutting system first. A sharp, lubricated chain on a clean bar should cut small limbs without forcing the saw.

• Will not start: battery is discharged, not latched, overheated, or the lock-off is not fully pressed.
• Chain does not move: chain brake or guard is engaged, sprocket area is jammed, or tension is too tight.
• Chain throws oil poorly: reservoir is empty, oil hole is clogged, or oil is too thick in cold weather.
• Chain derails: tension is loose, bar rails are worn, or drive links are damaged.
• Cuts crooked: cutters are uneven, one side is dull, or the bar groove is worn.
• Short runtime: dull chain, dry bar, oversized cuts, or weak battery.

Stop using the saw if the bar studs, cover, or front guard are damaged.

Compatible parts

Match replacement parts to the LCS1020 cutting set rather than to bar length alone. The chain must be 3/8″ LP pitch, .043″ gauge, and 40DL; a common .050″ chain will not seat correctly in a .043″ bar. The oil must flow in cordless-saw conditions and should remain tacky on the bar.

Compatible APOROZONA catalog SKUs include AP—10CB—LP043, AP—91PX—40, and AP—OIL—BD. Use the bar SKU when rails are worn or bent, the chain SKU for normal cutter wear, and the oil SKU for routine lubrication. Replace the bar and chain together if a damaged chain has hammered the rails or if the groove no longer holds drive links upright.

• Bar: 10″, .043″ groove.
• Chain: 3/8″ LP, 40DL.
• Oil: bar-and-chain oil suitable for cordless saws.