SCAC SFW36-16BV Operator's Manual

Walk-behind
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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. Before operating your machine,
please read all the information enclosed.
© 2008
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.
OPERATOR'S
MANUAL
SFW
Walk-Behind
Model:
SFW36-16BV
SFW48-16BV
PART NO. 03253
PRINTED 12/2008
PRINTED IN USA

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Summary of Contents for SCAC SFW36-16BV

  • Page 1 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.
  • Page 2 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...
  • Page 3: Table Of Contents

    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...
  • Page 4 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...
  • Page 5: General Information

    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.
  • Page 6: Symbols

    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...
  • Page 7: Safety Information

    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...
  • Page 8: Operation Considerations

    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.
  • Page 9: Maintenance Considerations & Storage

    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...
  • Page 10: Using A Spark Arrestor

    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.
  • Page 11: Safety And Instructional Decals

    Section 2 SAFETY AND INSTRUCTIONAL DECALS WARNING WARNING INSTALL BELT COvER BEFORE DO NOT OPERATE WITHOUT DISCHARGE CHUTE, MULCHING OPERATING MACHINE kIT, OR ENTIRE GRASS CATCHER INSTALLED READ OPERATOR'S MANUAL 483405 483402 483405 WARNING SPINNING BLADES ROTATING BLADES AND BELTS kEEP CLEAR * keep hands, feet &...
  • Page 12: Specifications

    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 &...
  • Page 13: Weights And Dimensions

    Section 3 Spindle Pulleys ..............................Split Steel Cutter Deck Belts ..............B-section with Kevlar Cord. Self-Adjusting, Self-Tightening Electric Clutch Type ....................Ogura Heavy Duty PTO Clutch Brake WEIGHTS AND DIMENSIONS Length..........................74" ........74" Tracking Width ........................35" ........35" Overall Width w/chute down ....................48" .........60.5" Overall Width w/chute up ....................36.5"...
  • Page 14: Operating Instructions

    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).
  • Page 15: Safety Interlock System

    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...
  • Page 16: Ground Travel And Steering

    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.
  • Page 17: Engaging The Deck Drive (Cutter Blades)

    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.
  • Page 18: After Operation

    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.
  • Page 19: Adjusting Cutting Height

    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.
  • Page 20: Troubleshooting Cutting Conditions

    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...
  • Page 21 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...
  • Page 22 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...
  • Page 23: Adjustments

    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...
  • Page 24: Electric Clutch Adjustment

    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.
  • Page 25 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.
  • Page 26: Maintenance

    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...
  • Page 27: Lubrication

    Section 7 MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS (CONT'D) HOURS PROCEDURE COMMENTS BREAk-IN (FIRST 10) Check hardware for tightness Change engine oil filter See paragraph 7.3 Replace engine fuel filter See paragraph 7.3 Adjust electric PTO clutch See paragraph 6.6 LUBRICATION GREASE FITTING LUBRICATION CHART NO.
  • Page 28: Engine Oil

    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.
  • Page 29: Engine Air Cleaner

    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.
  • Page 30: Tires

    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.
  • Page 31: Illustrated Parts List

    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) •...
  • Page 32: 36" Cutter Deck

    Section 8 36" CUTTER DECk...
  • Page 33 Section 8 36" CUTTER DECk Ref. Part No. Description 462150 Cutter Deck Weldment w/Decals 04112-06 Nut, 3/4-16 Spiral Lock 04063-01 Key, 1/4 x 1/4 x 1-1/4" 04021-09 Nut, Elastic Stop 3/8-16 04043-04 Flatwasher, 3/8-.391 x .938 x .105 HD 424615 Bracket, Belt Guide 424367 Dust Shield...
  • Page 34: 48" Cutter Deck

    Section 8 48" CUTTER DECk 22 5...
  • Page 35 Section 8 48" CUTTER DECk Ref. Part No. Description 462149 Cutter Deck Weldment w/Decals 04112-06 Nut, 3/4-16 Spiral Lock 04063-01 Key, 1/4 x 1/4 x 1-1/4" 04021-09 Nut, Elastic Stop 3/8-16 04043-04 Flatwasher, 3/8-.391 x .938 x .105 HD 424615 Bracket, Belt Guide 424367 Dust Shield...
  • Page 36: Cutter Deck Controls

    Section 8 CUTTER DECk CONTROLS...
  • Page 37 Section 8 CUTTER DECk CONTROLS Ref. Part No. Description 462183 Belt Cover, SFW w/Decals 462181 Frame Weldment w/Decals 04009-13 Bolt, Shoulder 1/2 x 1-1/2" 425023 Pusharm 43041 Spacer 04009-10 Bolt, Shoulder 1/2 x 2-3/4" 04019-04 Nut, Serrated Flange 3/8-16 04021-09 Nut, Elastic Stop 3/8-16 04043-04 Flatwasher, 3/8-.391 x .938 x .105 HD...
  • Page 38: Handle Assembly

    Section 8 HANDLE ASSEMBLY 9 10 SFW 2009 HA...
  • Page 39 Section 8 HANDLE ASSEMBLY Ref. Ref. Part No. Description Part No. Description 462187 Handle Weldment w/Decals 48210 Brake Band Assembly 452039 Operator Presence Handle, LH 42254 Link, Brake 452040 Operator Presence Handle, RH 04024-01 Nut, Push-On 483941 Spring, Operator Presence 44177 Rod, Brake 04001-13...
  • Page 40: Engine Deck

    Section 8 ENGINE DECk SFW2009ED...
  • Page 41 Section 8 ENGINE DECk Ref. Part No. Description 483796 Engine, 16HP Briggs & Stratton 483822 Transmission, 4-Speed 04017-16 Bolt, Serrated Flange 5/16-18 x 3/4" 48231 Switch, Neutral Interlock 48122-01 Fiber Washer, Thin 48122-02 Fiber Washer, Thick 48114-05 Grease Fitting, Straight 1/4-28 481581 Coupler, Jackshaft 481582...
  • Page 42: Electrical System And Throttle Control

    Section 8 ELECTRICAL SYSTEM AND THROTTLE CONTROL...
  • Page 43 Section 8 ELECTRICAL SYSTEM AND THROTTLE CONTROL Ref. No. Part No. Description 483957 Switch, PTO 10 Amp 48609 Keyswitch 462069 Key Chain w/Keys 483609 Key w/Shroud 48717 Switch 483904 Throttle Cable 04010-01 Screw, #10-32 x 1/2" 04019-01 Nut, #10-32 48028-05 Cable Tie 483872 Wire Harness, Handle Bar...
  • Page 44: Replacement Decals And Information Plates

    Section 8 REPLACEMENT DECALS AND INFORMATION PLATES WARNING WARNING INSTALL BELT COvER BEFORE OPERATING MACHINE DO NOT OPERATE WITHOUT DISCHARGE CHUTE, MULCHING READ OPERATOR'S MANUAL kIT, OR ENTIRE GRASS CATCHER INSTALLED 483402 483405 WARNING SPINNING BLADES ROTATING BLADES AND BELTS kEEP CLEAR * keep hands, feet &...
  • Page 45 Section 8 REPLACEMENT DECALS AND INFORMATION PLATES Ref. Part No. Description 483402 Decal, Belt Cover 483405 Decal, Discharge Chute 483505 Decal, Spinning Blades 483406 Decal, Warning-Rotating Blades 483404 Decal, Sulky Attachment 483407 Decal, Danger-Spinning Blades 483894 Decal, Cutting Height LH 483895 Decal, Cutting Height RH 48404...
  • Page 46: Sfw Electrical Schematic

    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...
  • Page 47: Limited Warranty - Sfw

    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.
  • Page 48 © 2008 Scag Power Equipment Division of Metalcraft of Mayville, Inc.

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Sfw48-16bv

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