55B21HV Owner’s Manual 532 18 63-04 Rev. 4 03.17.04 BY Printed in U.S.A.
SAFETY RULES Safe Operation Practices for Walk-Behind Mowers IMPORTANT: THIS CUTTING MACHINE IS CAPABLE OF AMPUTATING HANDS AND FEET AND THROWING OBJECTS. FAILURE TO OBSERVE THE FOLLOWING SAFETY INSTRUCTIONS COULD RESULT IN SERIOUS INJURY OR DEATH. DO NOT: • Do not trim near drop-offs, ditches or embankments. The operator could lose footing or balance. • Do not trim excessively steep slopes. • Do not mow on wet grass. Reduced footing could cause slipping. I.
Look for this symbol to point out impor tant safety precautions. It means CAUTION!!! BECOME ALERT!!! YOUR SAFETY IS INVOLVED. WARNING: Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.
ASSEMBLY Read these instructions and this manual in its entirety before you attempt to assemble or operate your new lawn mower. IMPORTANT: THIS LAWN MOWER IS SHIPPED WITHOUT OIL OR GASOLINE IN THE ENGINE. Your new lawn mower has been assembled at the factory with the exception of those parts left unassembled for shipping purposes. All parts such as nuts, washers, bolts, etc., necessary to complete the assembly have been placed in the parts bag.
ASSEMBLY TO ASSEMBLE GRASS CATCHER (See Figs. 3 and 4) 1. Slide grass catcher bag over the frame. Make sure the rear handle is on top (the same side as the front handle) and the strap is on the bottom. 2. Slip vinyl bindings over frame. NOTE: If vinyl bindings are too stiff, hold them in warm water for a few minutes. If bag gets wet, let it dry before using. 3. Close grass catcher door. NOTE: When fully closed, door will “snap” shut over frame and vinyl bindings.
OPERATION KNOW YOUR LAWN MOWER READ THIS OWNER'S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR LAWN MOWER. Compare the illustrations with your lawn mower to familiarize yourself with the location of various controls and adjustments. Save this manual for future reference. These symbols may appear on your lawn mower or in literature supplied with the product. Learn and understand their meaning.
OPERATION The operation of any lawn mower can result in foreign objects thrown into the eyes, which can result in severe eye damage. Always wear safety glasses or eye shields while operating your lawn mower or performing any adjustments or repairs. We recommend standard safety glasses or a wide vision safety mask over spectacles. HOW TO USE YOUR LAWN MOWER OPERATOR PRESENCE CONTROL BAR THROTTLE / ENGINE CONTROL (See Fig.
OPERATION • Lift the round door of the discharge chute and place the grass catcher into place on the discharge chute. NOTE: Be sure round door of discharge chute rests on grass catcher as shown. • Mower is now ready for rear bagging operation. • To convert to mulching operation, remove grass catcher and discharge chute. Secure mulcher door to mower housing with knob. • To convert to side discharging operation, remove grass catcher and discharge chute.
OPERATION • To convert to rear bagging operation, side discharge deflector must be removed; discharge chute and grass catcher installed and discharge chute secured to mower housing with knob. MULCHER DOOR TO EMPTY GRASS CATCHER (See Figs. 12 and 13) 1. Open round door of discharge chute to move starter rope out and away from grass catcher. KNOB FRONT HANDLE OPEN ROUND DOOR THREADED STUD STARTER ROPE FIG. 12 SIDE DISCHARGE DEFLECTOR 2.
OPERATION BEFORE STARTING ENGINE OIL FILLER CAP/DIPSTICK ADD OIL (See Figs. 14 and 15) Your lawnmower is shipped without oil in the engine. For type and grade of oil to use, see “ENGINE” in the Maintenance section of this manual. CAUTION: DO NOT overfill engine with oil, or it will smoke heavily from the muffler on startup. UPPER LIMIT 1. Be sure lawnmower is level. 2. Remove oil dipstick from oil fill spout. 3. Engine holds 18.5 ounces of oil.
OPERATION MULCHING MOWING TIPS OFF IMPORTANT: FOR BEST PERFORMANCE, KEEP MOWER HOUSING FREE OF BUILT-UP GRASS AND TRASH. SEE “CLEANING” IN THE MAINTENANCE SECTION OF THIS MANUAL. ON • • • FUEL VALVE LEVER FIG. 16 The special mulching blade will recut the grass clippings many times and reduce them in size so that as they fall onto the lawn they will disperse into the grass and not be noticed. Also, the mulched grass will biodegrade quickly to provide nutrients for the lawn.
MAINTENANCE BEFORE EACH USE AFTER EACH USE EVERY 10 HOURS EVERY 25 HOURS OR SEASON EVERY 100 HOURS BEFORE STORAGE Check for Loose Fasteners Clean / Inspect Grass Catcher * Check Tires Check Drive Wheels *** Clean Lawn Mower **** Clean under Drive Cover *** Check Drive Belt / Pulleys *** Check / Sharpen / Replace Blade Lubrication Clean and Recharge Battery ** Check Engine Oil level Change Engine Oil Clean Air Filter Inspect Muffler Replace Spark Plug Replace Air Filter Paper Cartridge Empty fuel syste
MAINTENANCE LAWN MOWER TO SHARPEN BLADE NOTE: We do not recommend sharpening blade - but if you do, be sure the blade is balanced. Care should be taken to keep the blade balanced. An unbalanced blade will cause eventual damage to lawn mower or engine. • The blade can be sharpened with a file or on a grinding wheel. Do not attempt to sharpen while on the mower. • To check blade balance, drive a nail into a beam or wall. Leave about one inch of the straight nail exposed.
MAINTENANCE TO CHANGE ENGINE OIL (See Fig. 19) AIR FILTER NOTE: Before tipping lawn mower to drain oil, empty fuel tank by running engine until fuel tank is empty. 1. Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with spark plug. 2. Remove engine oil cap; lay aside on a clean surface. 3. Tip lawn mower on its side as shown and drain oil into a suitable container. Rock lawn mower back and forth to remove any oil trapped inside of engine.
SERVICE AND ADJUSTMENTS TO REMOVE DRIVE BELT (See Figs. 20–22) HOUSING HOLE 1. Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with spark plug. 2. Remove screws retaining drive cover and remove drive cover from lawn mower housing (See Fig. 20). CRANKSHAFT TAB BLADE ADAPTER HARDENED WASHER SCREWS DEBRIS SHIELD LOCKWASHER SCREW LAWN MOWER HOUSING FIG. 22 7.
SERVICE AND ADJUSTMENTS 2. Route the other end of the new drive belt through hole in housing. 3. Reattach debris shield to housing with screw previously removed. Be sure tab of debris shield is in gap of housing. 4. Position blade on the blade adapter aligning the two (2) holes in the blade with the raised lugs on the adapter. 5. Be sure the trailing edge of blade (opposite sharp edge) is up toward the engine as shown (See Fig. 22). 6.
STORAGE HANDLE (See Figs. 25 and 26) ENGINE You can fold your lawn mower handle for storage. 1. Loosen the two (2) handle knobs on sides of the upper handle and allow handle to fold down to the rear. 2. Remove the two (2) handle knobs and carriage bolts on sides of the lower handle and pivot entire handle assembly forward and allow it to rest on mower. 3. Reinstall knobs and carriage bolts to lower handle or handle brackets for safe keeping.
TROUBLESHOOTING POINTS PROBLEM Does not start CAUSE 1. Dirty air filter. 2. Out of fuel. 3. Stale fuel. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Loss of power CORRECTION 1. Clean/replace air filter. 2. Fill fuel tank. 3. Empty fuel tank and refill tank with fresh, clean gasoline. Water in fuel. 4. Empty fuel tank and refill tank with fresh, clean gasoline. Spark plug wire is disconnected. 5. Connect wire to plug. Bad spark plug. 6. Replace spark plug. Loose blade or broken blade adapter. 7.
ROTARY LAWN MOWER - - MODEL NUMBER 55B21HV (55B21HVA) PRODUCT NUMBER 954 22 32-27 GEAR CASE ASSEMBLY - - PART NUMBER 532 18 36-99 KEY NO. PART NO. DESCRIPTION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 -- 817 54 10-11 532 16 06-72 532 05 70-72 532 18 39-08 532 16 08-18 532 07 78-81 532 16 08-17 532 85 08-48 532 18 41-34 532 16 06-79 532 16 06-73 532 05 70-79 812 00 00-39 532 08 64-47 532 75 03-69 Screw, Tapping #10-24 x .
ROTARY LAWN MOWER - - MODEL NUMBER 55B21HV (55B21HVA) - PRODUCT NUMBER 954 22 32-27 20
ROTARY LAWN MOWER - - MODEL NUMBER 55B21HV (55B21HVA) - PRODUCT NUMBER 954 22 32-27 21 KEY NO. PART NO.
ROTARY LAWN MOWER - - MODEL NUMBER 55B21HV (55B21HVA) - PRODUCT NUMBER 954 22 32-27 22
ROTARY LAWN MOWER - - MODEL NUMBER 55B21HV (55B21HVA) - PRODUCT NUMBER 954 22 32-27 23 KEY NO. PART NO.
The product must exhibit reasonable care, maintenance, operation, storage and general upkeep as written in the maintenance section of the Owner’s/Operator’s manual. Should an operational problem or failure occur, the product should not be used, but delivered as is to an authorized Husqvarna dealer for evaluation. Proof of purchase, as explained in section 6, rests solely with the customer.
