Summary of Contents for Scag Power Equipment STR Operator's
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OPERATOR'S MANUAL TURF RUNNER MODEL STR FROM SERIAL NUMBER 60001 TO 69999 PART 03028...
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WARNING FAILURE TO FOLLOW SAFE OPERATING PRACTICES MAY RESULT IN SERIOUS INJURY. * Keep all shields in place, especially the grass discharge chute. * Before performing any maintenance or service, stop the machine and remove the spark plug wire and ignition key. * If a mechanism becomes clogged, stop the engine before cleaning.
TABLE OF CONTENTS SUBJECT PAGE Section 1 - General Information Introduction ..........................1 Directional Reference ......................1 Servicing the Engine and Drive Train Components ............... 1 Section 2 - Safety Information Introduction ..........................2 Signal Words .......................... 2 Before Operation Considerations ................... 2 Operation Considerations .......................
All information is based upon product information available operating, maintenance and adjustment instructions in this at time of approval for printing. Scag Power Equipment manual. reserves the right to make changes at any time without notice and without incurring any obligation.
Section 2 SAFETY INFORMATION 2.1 INTRODUCTION Your mower is only as safe as the operator. Carelessness or The signal word “DANGER” denotes that an extremely operator error may result in serious bodily injury or death. Hazard control and accident prevention are dependent upon hazardous situation exists on or near the machine that could result in high probability of death or irreparable injury if the awareness, concern, prudence, and proper training of...
Section 2 6. Operator hearing protection is recommended, 13. DO NOT operate without a chute deflector installed; particularly for continuous operation of the mower. keep the deflector in lowest possible position. Wear suitable hearing protection. Prolonged exposure to loud noise can cause hearing impairment or loss. 14.
Section 2 7. Be alert for holes, rocks, and roots in the terrain and 2.5 MAINTENANCE CONSIDERATIONS other hidden hazards. Keep away from any dropoff. Beware of overhead obstructions (low limbs, etc.), 1. Never make adjustments to the machine with the engine underground obstacles (sprinklers, pipes, tree roots, running unless specifically instructed to do so.
Section 3 SPECIFICATIONS 3.1 ENGINE General Type ................Heavy Duty Industrial/Commercial Gasoline Brand ..................Kohler Model ..................Command Horsepower ................20 HP at 3600 RPM (Scag Model STR48-20CH) 22 HP at 3600 RPM (Scag Model STR48-22CH) Type ................... 4 Cycle Gasoline, Twin Cylinder, Horizontal Shaft Displacement ................
Section 4 OPERATING INSTRUCTIONS 1. Ignition Switch (Figure 4-1). The ignition switch is CAUTION: used to start the engine and has three positions; OFF, ON, and START. Do not attempt to operate this mower unless you have read this manual. Learn the location and 2.
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Section 4 5. Ammeter (Figure 4-1). Indicates the condition of Dump Valve Handle the charging system. When the engine is running the needle should be at the positive end of the meter. If the needle is on the negative end of the meter, this indicates a discharge condition and the machine should be taken in for service.
Section 4 4.2 SAFETY INTERLOCK SYSTEM 4.4 STARTING THE ENGINE The mower is equipped with a safety interlock system CAUTION: that prevents the engine from starting unless the deck drive is disengaged and the speed control is in neutral. DO NOT USE STARTING FLUIDS. Use of starting The interlock system shuts off the engine if the operator fluids in the air intake system may be potentially leaves the seat with the speed control not in the neutral...
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Section 4 -IMPORTANT- Forward Travel Start practice with a slow engine speed and slow forward travel. -NOTE- Use one hand on both steering levers as shown in Do not push the steering control levers forward Figure 4-5 to minimize overcontrol. when traveling forward.
Section 4 Reverse Travel 4.6 ENGAGING THE DECK DRIVE (CUTTER BLADES) CAUTION: 1. Set the throttle at about 3/4 speed. Do not attempt to engage the deck drive at high speed as this shortens Before backing up, observe the rear for persons the electric clutch life —...
Section 4 4.7 HILLSIDE OPERATION WARNING: To minimize the possibility of overturning, the least dangerous method of operating on hills and terraces is to travel vertically up and down the slope, not horizontally along the slope. Avoid any unnecessary turns and travel at reduced speed. 1.
Section 4 4. Fill the fuel tank with fresh, clean fuel at the end of Grass Catching Operation every day of operation. CAUTION: 5. Check the tire pressure. Inflate tires if necessary. Never leave grass clippings in the hopper after mowing.
Section 4 B. Raise the tailgate until the u-bolt on top of the Release the latch holding the tailgate and then hopper engages with the latch on the tailgate lower the tailgate. Be careful when lowering the (Figure 4-11). tailgate. It is spring loaded and will close with some force.
Section 4 2. If the blower intake becomes clogged, there could be 4.12 MOVING MOWER WITH ENGINE a distinct change in the sound of the blower and/or STOPPED the mower deck will begin to leave a trail of glass clippings. The clogging will generally develop in the To “free-wheel”...
Section 4 4.14 ADJUSTING CUTTING HEIGHT 4.15 TILTING THE CUTTER DECK The mower deck can be adjusted from a height of 1-inch WARNING: to 4-1/2 inches at 1/2-inch intervals. To adjust the cutting height: Do not tilt the mower deck with the mower blades rotating.
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Section 4 Pull Back on Collar Drive Shaft Spindle Figure 4-15 Disconnecting the Drive Shaft 2. Tilt the deck and secure in place with the two prop rods (Figure 4-16). Seat Raised Figure 4-17 Removing The Deck 6. Pull the deck from the tractor as shown in Figure 4-17. B.
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Section 4 2. Install the cutter deck onto the push arm shafts just far enough to hold the deck in place. Align the WARNING: cutter deck discharge chute with the blower intake chute (Figure 4-19) and push the cutter deck all the If the driveshaft is not securely fastened to the way onto the push arm shafts, inserting the discharge spindle shaft it will come off the shaft and spin...
Section 5 TROUBLESHOOTING CUTTING CONDITIONS CAUSE CURE CONDITION 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 (CONT'D) CAUSE CURE CONDITION Uneven Cut on Flat Lift worn from blade Replace blade Ground - Wavy High-Low Blade upside down Mount with cutting edge toward Appearance, ground Scalloped Cut, or Rough Contour Deck plugged, grass accumulation Clean underside of deck Too much blade angle (deck pitch) Adjust pitch and level...
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Section 5 TROUBLESHOOTING (CONT'D) CAUSE CURE CONDITION Scalping - Blades Low tire pressures Check and adjust pressures Hitting Dirt or Ground speed too fast Cutting Very Close to Slow speed to adjust for conditions the Ground Cutting too low May need to reduce ground speed, raise cutting height, change direction of cut, and/or change pitch and level Rough terrain...
Section 6 ADJUSTMENTS Parking Remove Cotter Pin Here Brake Brake Rod 6.1 PARKING BRAKE ADJUSTMENT Lever WARNING: Swivel Joint Do not operate the mower if the parking brake is Hold Brake Lever In This Direction not operable. Possible severe injury could result.
Section 6 6.2 TRAVEL ADJUSTMENTS Jam Nut Adjusting Rod Neutral or tracking adjustments will need to be made if: Spring Cotter Pin A. The speed control lever is in neutral and the Hold Axle Lever machine creeps forward or backward. (Neutral In This Direction Adjustment) B.
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Section 6 3. If the adjustments are okay and you need to adjust the neutral linkages, proceed with the Neutral Bracket Against Neutral Interlock Switch Pressure Switch Adjustment procedures. If the speed control requires adjustment, adjust as follows: A. Loosen both jam nuts (A & B, Figure 6-6) on the adjusting rod (C).
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Section 6 Handles Aligned Flat Turnbuckle Left Handle Right Handle Speed Control Lever 4.5" L.H. Speed Control Lever Figure 6-6 Neutral and Tracking Adjustments 5. Tighten the jam nuts (D & E) to hold the setting in B. To get both wheels to come out of neutral at the place.
Section 6 Tracking Adjustment -IMPORTANT- Before proceeding with this adjustment, be sure that the tire pressure in the three tires is correct, that the caster wheels turn freely, and that the two transmission drive belts are adjusted for the correct tension.
Section 6 6.3 THROTTLE CONTROL AND CHOKE ADJUSTMENTS These adjustments must be performed by your Scag dealer to ensure proper and efficient running of the engine. Should either need adjustment, contact your authorized Scag service center. 6.4 ENGINE BELT ADJUSTMENT WARNING: Adjusting Nut Before removing any guards, shut the...
Section 7 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS (CONT'D) HOURS Break-In 40 100 200 500 Procedure Comments (First 10) Apply grease to fittings See paragraph 7.2 Check hardware for tightness Change engine oil filter See paragraph 7.4 Check hydraulic oil level See paragraph 7.3 Replace engine fuel filter See paragraph 7.5...
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Section 7 + Compatible Greases: Mobilix #2 found at Mobil Service Stations Ronex MP found at Exxon Service Stations Super Lube MEP #2 & Super Stay-M #2 found at Conoco Stations Shell Alvania #2 found at Shell Service Stations Lidok EP #2 found at industrial shops RIGHTSIDE UNDERSEAT LEFTSIDE...
Section 7 7.3 HYDRAULIC SYSTEM B. Changing Hydraulic Oil The hydraulic oil should be changed after every 500 A. Checking Hydraulic Oil Level hours or annually, whichever occurs first. The oil should also be changed if the color of the fluid has The hydraulic oil level should be checked after the first become black or milky.
Section 7 B. Changing Engine Crankcase Oil After the first 5 hours of operation, change the engine crankcase oil and replace the oil filter. Thereafter, Hydraulic Oil Filter change the engine crankcase oil after every 100 hours of operation or bi-weekly, whichever occurs first. Refer to the Engine Operator’s Manual furnished with this mower for instructions.
Section 7 7.5 ENGINE FUEL SYSTEM 7.6 ENGINE AIR CLEANER A. Filling the Fuel Tank A. Cleaning and/or Replacing Air Cleaner Element Fill the fuel tank at the end of each operating day to within 1 inch below the filler neck. Do not overfill. Use For any air cleaner, the operating environment dictates clean, fresh unleaded gasoline with a minimum octane the air cleaner service periods.
Section 7 7.7 BATTERY WARNING: A. Checking Electrolyte Level and Cleaning Electric storage battery fluid contains sulfuric Battery acid which is POISON and can cause SEVERE CHEMICAL BURNS. Avoid contact of fluid After every 40 hours of operation or weekly, whichever with eyes, skin, or clothing.
Section 7 -IMPORTANT- Do not overfill the battery. Electrolyte will WARNING: overflow through the vent tube onto parts of BATTERIES PRODUCE EXPLOSIVE GASES. the machine, resulting in severe corrosion. Charge the battery in a well ventilated space so gases produced while charging can 3.
Section 7 7.9 CUTTER BLADES 3. Check the blades for straightness by marking the tip position of the blade on the inside of the deck. Then rotate the opposite tip of the blade to the same A. Blade Inspection position. Compare the difference in the blade tip track.
Section 7 Blade Adapter B. Blade Sharpening Blade Adapter -NOTE- If possible, use a file to sharpen the blade. Using a wheel grinder may burn the blade. -NOTE- DO NOT sharpen the blades beyond 1/3 of the width of the blade. Attaching Hardware Attaching Hardware Bolt, Lockwasher and...
Section 7 7.11 HOPPER 1. Underneath the gearbox is a drain plug. This drain plug is accessible through a hole in the gearbox mounting plate and can be reached from the left side The hopper screen should be cleaned after every 8 hours of the mower.
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Section 7 The fluid level in the cutter deck gearboxes (Figure 7-12) 2. Raise the cutter deck and secure in place with the two should be checked after every 100 hours of operation or prop rods. bi-weekly, whichever occurs first. 3.
Section 7 12. Clean and remove the check plug dipstick from the 7.14 BODY, DECK, HOPPER AND center gearbox and fill the gearbox with Mobil UPHOLSTERY SHC630 lubricant until it is full, as indicated on the dipstick. Install the check plug dipstick and tighten CAUTION: securely, then back the dipstick out so that the slot is parallel with the front of the gearbox.
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Section 8 REPLACEMENT DECALS AND INFORMATION PLATES DANGER WARNING HEAVY DUTY ROTATING BLADES AND BELTS COMMERCIAL SPINNING BLADE KEEP HANDS, FEET & CLOTHING CLEAR KEEP ALL GUARDS IN PLACE SHUT OFF ENGINE & DISENGAGE BLADE KEEP CLEAR 48072 CLUTCH BEFORE SERVICING CLEAR AREA OF DEBRIS BEFORE MOWING CONTACT CAN INJURE USE CAUTION IN DIRECTING DISCHARGE...
Section 8 ELECTRICAL SCHEMATIC RELAY ENGINE GROUND ADAPTER BLUE SOLENOID STARTER AQUA WIPER MOTOR BLUE ENGINE BLUE HOPPER SWITCH SEAT SWITCH NEUTRAL SWITCH INSTRUMENT PANEL BLUE HOUR METER BLUE CUTTER ELECTRIC DECK CLUTCH SWITCH SWITCH AMMETER RELAY BATTERY FORWARD STR017...
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Scag, are either incompatible with the Scag mower or adversely affect its operation, performance or durability. Scag Power Equipment reserves the right to change or improve the design of any mower without assuming any obligation to modify any mower previously manufactured.
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