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OPERATOR’S MANUAL Walk-Behind Model: SFW36-16BV SFW48-16BV Congratulations on owning a Scag mower! This manual contains the operating instructions and safety information for your Scag mower. Reading this manual can provide you with assistance in maintenance and adjustment procedures to keep your mower performing to maximum efficiency. The specific models that this book covers are listed on the inside cover.
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CONCERN, PRUDENCE, AND PROPER TRAINING OF THE PERSONNEL INvOLvED IN THE OPERATION, TRANSPORT, MAINTENANCE, AND STORAGE OF THE EqUIPMENT. This manual covers the operating instructions and illustrated parts list for: SFW36-16Bv with a serial number of E5600001 to E5699999 SFW48-16Bv...
Table of Contents Table of Contents SECTION 1 - GENERAL INFORMATION ...................1 1.1 INTRODUCTION ............................1 1.2 DIRECTION REFERENCE ...........................1 1.3 SERvICING THE ENGINE AND DRIvE TRAIN COMPONENTS ..............1 1.4 SYMBOLS ..............................2 SECTION 2 - SAFETY INFORMATION ..................3 2.1 INTRODUCTION ............................3 2.2 SIGNAL WORDS ............................3 2.3 BEFORE OPERATION CONSIDERATIONS ....................3 2.4 OPERATION CONSIDERATIONS ........................4...
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Table of Contents SECTION 6 - ADJUSTMENTS ....................19 6.1 DRIvE CONTROL ADJUSTMENTS ......................19 6.2 THROTTLE CONTROL AND CHOkE ADJUSTMENTS ................19 6.3 BELT ADJUSTMENT ..........................19 6.4 BELT ALIGNMENT .............................19 6.5 CUTTER DECk ADJUSTMENTS ......................19 6.6 ELECTRIC CLUTCH ADJUSTMENT ......................20 SECTION 7 - MAINTENANCE ....................22 7.1 MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS ............22...
Section 1 GENERAL INFORMATION INTRODUCTION USE ONLY SCAG APPROvED ATTACHMENTS AND ACCESSORIES. Your mower was built to the highest standards in the Attachments and accessories manufactured by companies industry. However, the prolonged life and maximum other than Scag Power Equipment are not approved for efficiency of your mower depends on you following the use on this machine.
Section 1 SYMBOLS SYMBOL DESCRIPTION SYMBOL DESCRIPTION Choke Transmission Parking Brake Spinning Blade 48071S On/Start Spring Tension on Idler Off/Stop Falling Hazard Thrown Object Hazard Fast Slow Continuously Variable - Linear Cutting Element - Basic Symbol Pinch Point Cutting Element - Engage 481039S Hour meter/Elapsed Operating Hours Cutting Element - Disengage...
Section 2 SAFETY INFORMATION INTRODUCTION DANGER Your mower is only as safe as the operator. Carelessness or operator error may result in serious bodily injury The signal word “DANGER” denotes that an extremely or death. Hazard control and accident prevention are hazardous situation exists on or near the machine that dependent upon the awareness, concern, prudence, and could result in high probability of death or irreparable injury...
Section 2 If the operator(s) or mechanic(s) cannot read English Keep flammable objects (cigarettes, matches, etc.), or Spanish, it is the owner's responsibility to explain open flames and sparks away from the fuel tank and this material to them. Contact your local Authorized fuel container.
Section 2 WARNING DANGER DO NOT use your hand to dislodge the clogged DO NOT run the engine inside a building or discharge chute. Use a stick or other device to a confined area without proper ventilation. remove clogged material after the engine has Exhaust fumes are hazardous and contain stopped running and the blades have stopped carbon monoxide which can cause brain injury...
Section 2 Keep all nuts, bolts and screws tight, to ensure the machine is in safe working condition. Check blade mounting bolts frequently to be sure they are tight. Do not change the engine governor settings or overspeed the engine. See the engine operator's manual for information on engine settings.
General Type ....................Heavy Duty Industrial/Commercial Gasoline Brand ............................... Briggs & Statton Horsepower: (Scag Model SFW36-16BV) ..................16 HP (Spec.#305776929002) (Scag Model SFW48-16BV ..................16 HP (Spec.# 305776929002) Cylinders ............................. 2 with Cast-Iron Sleeves Governor ................Mechanical Type with Variable Speed Control Set At 3600 RPM Idle Speed: Briggs &...
Section 4 OPERATING INSTRUCTIONS Mower Deck Switch (Figure 4-1). Used to engage CAUTION and disengage the mower drive system. Pulling up on the switch will engage the deck drive. Pushing down on the switch will disengage the deck drive. Do not attempt to operate this mower unless you Engine Choke Control (Figure 4-1).
Section 4 INITIAL RUN-IN PROCEDURES Left Steering / Brake Control (Figure 4-1). Used to control the mower's left wheel when traveling forward or reverse. Pull upward to apply brake. FIRST DAY OF USE OR APPROxIMATELY 20 HOURS Right Steering / Brake Control (Figure 4-1). Used to control the mower's right wheel when traveling Check all belts for proper alignment and wear at 2, 4...
Section 4 GROUND TRAvEL AND STEERING REvERSE TRAvEL - IMPORTANT - CAUTION If you are not familiar with the operation of a walk behind mower with a transmission, the steering and ground speed operations should be learned Disengage power to the mower before backing and practiced in an open area, away from buildings, up.
Section 4 ENGAGING THE DECk DRIvE (CUTTER HILLSIDE OPERATION BLADES) WARNING Set the throttle at about 3/4 speed. Do not attempt to engage the deck drive at high speed as this shortens the electric clutch life — use only moderate engine speed when engaging the deck drive.
Section 4 AFTER OPERATION 4.11 MOvING MOWER WITH ENGINE STOPPED Wash the entire mower after each use. Do not use high pressure spray or direct the spray onto To “free-wheel” or move the mower around without the electrical components. engine running, engage the neutral latches, shift the transmission to neutral and move the mower by hand.
Section 4 4.13 ADJUSTING CUTTING HEIGHT CUTTING HEIGHT 1-1/2 The mower deck can be adjusted from a height of 1-1/2 inches to 4-1/2 inches at 1/4-inch intervals. To adjust the 1-3/4 cutting height: 2-1/4 2-1/2 2-3/4 WARNING 3-1/4 3-1/2 3-3/4 DO NOT adjust the cutting height with the mower 4-1/4 blades rotating.
Section 5 TROUBLESHOOTING CUTTING CONDITIONS CONDITION CAUSE CURE STRINGERS - OCCASIONAL Low engine RPM Run engine at full RPM BLADES OF UNCUT GRASS Ground speed too fast Slow speed to adjust for conditions Wet grass Cut grass after it has dried out Dull blades, incorrect sharpening Sharpen blades Deck plugged, grass accumulation...
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Section 5 TROUBLESHOOTING CUTTING CONDITIONS (CONT'D) CONDITION CAUSE CURE U N E v E N C U T O N F L AT Lift worn from blade Replace blade GROUND - WAvY HIGH-LOW APPEARANCE, SCALLOPED Blade upside down Mount with cutting edge toward ground CUT, OR ROUGH CONTOUR Deck plugged, grass accumulation Clean underside of deck...
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Section 5 TROUBLESHOOTING CUTTING CONDITIONS (CONT'D) CONDITION CAUSE CURE SCALPING - BLADES HITTING Low tire pressures Check and adjust pressures DIRT OR CUTTING vERY CLOSE TO THE GROUND Ground speed too fast Slow speed to adjust for conditions May need to reduce ground speed, raise Cutting too low cutting height, change direction of cut, and/or change pitch and level...
Section 6 ADJUSTMENTS DRIvE CONTROL ADJUSTMENTS BELT ADJUSTMENT Adjust the steering control rods so that there is approximately 3/4" clearance from the bottom of the WARNING rod to the bottom of the neutral latch slot when in the drive position. See Figure 6-1. Before removing any guards, shut the engine off Adjust the steering brake rods so that the brakes do not apply until the steering levers are pulled tight to...
Section 6 On the front of the cutter deck locate the cutter deck Check the distance from the top of the cutter deck to the adjustment slots. See Figure 6-2. floor at the rear RH side of the cutter deck directly behind the cutter deck height adjustment bracket.
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Section 6 If the air gap is too narrow, the clutch armature may drag INSERT 0.015 FEELER GAUGE HERE when disengaged, resulting in premature failure. If the air gap is too wide, the clutch may be slow to engage as the magnet must pull the armature in from a greater distance.
Section 7 MAINTENANCE MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS HOURS PROCEDURE COMMENTS BREAk-IN 100 200 500 (FIRST 10) Check all hardware for tightness C h e c k a l l b e l t s f o r p r o p e r See paragraph 7.6 alignment Check engine oil level...
Section 7 ENGINE OIL ENGINE FUEL SYSTEM DANGER ENGINE OIL FILLER To avoid injury from burns, allow the mower to cool before removing the fuel tank cap and refueling. A. FILLING THE FUEL TANk ENGINE OIL Fill the fuel tank at the beginning of each operating day FILTER to within one (1) inch below the filler neck.
Section 7 If fuel is spilled on clothing, change clothing Remove the air cleaner and inspect. immediately and wash affected skin. Clean or replace the air cleaner and foam Replace gas cap and tighten securely. pre-cleaner as recommended by the engine manufacturer.
Section 7 sharpened. Remove the blades for sharpening. See Raise the mower deck to the highest position. Place "Blade Replacement." the lanyard pin in the highest cutting height position to prevent the cutter deck from falling. - NOTE - Secure the cutter blades to prevent them from Keep the blades sharp.
Section 8 ILLUSTRATED PARTS LIST SCAG APPROvED ATTACHMENTS AND ACCESSORIES. Attachments and accessories manufactured by companies other than Scag Power Equipment are not approved for use on this machine. Scag approved attachments and accessories: • Mulch Plate (p/n 920G, 9298) •...
Section 8 SFW ELECTRICAL SCHEMATIC Operator Presence Switch BLACK KEY SWITCH WHITE BLACK BLACK HOURMETER YELLOW Operator BLK W/RED STRIPE Presence BLK W/RED STRIPE Switch MOWER ENGAGE WHITE YELLOW BLUE WHITE TO ENGINE DECK WIRE HARNESS TO HANDLE BAR WIRE HARNESS BLACK CLUTCH BLUE...
LIMITED WARRANTY - SFW Any part of the Scag commercial mower manufactured by Scag Power Equipment and found, in the reasonable judgment of Scag, to be defective in materials or workmanship, will be repaired or replaced by an Authorized Scag Service Dealer without charge for parts and labor during the periods specified below.
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