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: STC48V-19KAI with a serial number of E4600001 to E4699999 STC48V-23CV...
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 ....................22 6.1 PARKING BRAKE ADJUSTMENT ......................22 6.2 TRAvEL ADJUSTMENTS ..........................22 6.3 THROTTLE CONTROL AND CHOKE ADJUSTMENTS ................24 6.4 BELT ADJUSTMENT ..........................24 6.5 BELT ALIGNMENT .............................24 6.6 CUTTER DECK ADJUSTMENTS ......................24 6.7 CUSTOM-CUT BAFFLE ADJUSTMENT ....................26 6.8 ELECTRIC CLUTCH ADJUSTMENT ......................27 SECTION 7 - MAINTENANCE...
Attachments and accessories manufactured by companies industry. However, the prolonged life and maximum other than Scag Power Equipment are not approved for use efficiency of your mower depends on you following the on this machine. See Section 8, Paragraph 8-1.
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 DO NOT add fuel to a running or hot engine. Allow or Spanish, it is the owner's responsibility to explain the engine to cool for several minutes before adding this material to them. fuel.
Page 9
Section 2 To prevent tipping or loss of control, start and stop The machine and attachments should be stopped smoothly, avoid unnecessary turns and travel at and inspected for damage after striking a foreign reduced speed. object, and damage should be repaired before restarting and operating the machine.
Section 2 ROLL-OvER PROTECTION SYSTEM Lower the roll bar only when absolutely necessary. To lower the roll bar, loosen the tension knob on both the left hand and right hand bar. See Figure 2-1. WARNING Remove the hairpin cotter pins and remove the two (2) lock pins.
Page 11
Section 2 It is recommended that the seat belt be inspected on a WARNING daily basis for signs of damage. Any seat belt system that shows cuts, fraying, extreme or unusual wear, significant discoloration due to UV exposure, dirt or stiffness, abrasion to the seat belt webbing, or damage to the buckle, latch Reduce speed when turning, operating on slopes, plate, hardware or any other obvious problem should be...
Section 2 MAINTENANCE CONSIDERATIONS & WARNING STORAGE Never make adjustments to the machine with the Hydraulic fluid is under high pressure. Keep engine running unless specifically instructed to do body and hands away from pinholes or nozzles so. If the engine is running, keep hands, feet, and that eject hydraulic fluid under high pressure.
Section 2 SAFETY AND INSTRUCTIONAL DECALS WARNING INSTALL BELT COvER BEFORE OPERATING MACHINE READ OPERATOR'S MANUAL 483402 FORWARD 483407 REvERSE 481568 WARNING Operation of this equipment may create sparks that can start res around dry vegetation. A spark arrestor may be required. 483633 The operator should contact local re agencies for laws...
General Type ....................Heavy Duty Industrial/Commercial Gasoline Brand ..........................Briggs & Statton, Kohler, Kawasaki Horsepower: (Scag Model STC48V-19KAI) ..................19 HP (Spec.#FH580V-AS37R) (Scag Model STC48V-23CV) ..................... 23 HP (Spec.# PS-75607) (Scag Model STC48V-25CV, STC52V-25CV, STC61V-25CV) ........25 HP (Spec# CV730-3112) (Scag Model STC48V-26BS) ..................26 HP (Spec.# 44P7770115E1) (Scag Model STC52V-27CV, STC52V-27CV-SS, STC61V-27CV) ........
Section 3 Tire Pressure: Front Caster............................... 25 PSI Drive .................................. 12 PSI Fuel Tanks ..........Dual 4-Gallon Seamless Polyethylene Tanks with Large Opening and Fuel Cap Seat ....................Padded, Thick Cushion with Extra Spring Support Travel Speed: Forward ................................0-10 MPH Reverse ................................0-5 MPH -NOTE- The machine will travel at 10 mph for transport purposes.
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 Fuse Holders (Figure 4-1). Deck Release Lever (Figure 4-1). Two 20-amp fuses Used to lock the protect the mower’s electrical system. To replace cutter deck in the transport position. Push the foot fuses, pull fuse out of the socket and install a new pedal forward and pull back on the release lever to fuse.
Section 4 STARTING THE ENGINE Learn to feather the steering controls to obtain a smooth operating action. Practice operating the mower until you are CAUTION comfortable with the controls before proceeding to mow. DO NOT USE STARTING FLUIDS. Use of starting FORWARD TRAvEL fluids in the air intake system may be potentially explosive or cause a “runaway”...
Section 4 REvERSE TRAvEL ENGAGING THE DECK DRIvE (CUTTER BLADES) CAUTION 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 HILLSIDE OPERATION AFTER OPERATION Wash the entire mower after each use. Do not WARNING use high pressure spray or direct the spray onto electrical components. - IMPoRtANt - DO NOT operate on steep slopes. To check a slope, attempt to back up it (with the cutter deck down).
Section 4 4.11 MOvING MOWER WITH ENGINE Keep mower and discharge chute clean. STOPPED When mowing wet or tall grass, mow the grass twice. Raise the mower to the highest setting for the first pass and then make a second pass to the desired To “free-wheel”...
Section 4 Insert the lanyard pin into the cutting height index at the desired cutting height. Push forward on the deck lift foot lever, hold in place and pull back on the deck release lever. See Figure 4-6. Slowly release the foot pedal.
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 24
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 25
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 PARKING BRAKE ADJUSTMENT STC2002BA WARNING Do not operate the mower if the parking brake LOOSEN HERE is not operable. Possible severe injury could BRAKE HANDLE result. The parking brake linkage should be adjusted whenever the parking brake lever is placed in the “ENGAGE” position and the parking brake will allow the mower to move.
Page 27
Section 6 NEUTRAL ADJUSTMENT TRACKING ADJUSTMENT Be sure the dump valve levers are in the run position and the steering control levers are in the neutral lock CAUTION position. With an operator in the seat, start the engine and Stop the engine and remove the key from the disengage the parking brake.
Section 6 CUTTER DECK ADJUSTMENTS A. Stop the machine and place the steering control levers in the neutral position. Loosen the lock nuts securing the ball joints at each end of the RH steering Cutter deck level, pitch and height are set at the factory. control rod.
Page 29
Section 6 CUTTER DECK PITCH CUTTER DECK HEIGHT The pitch of the cutter deck should be equal between The cutter deck height adjustment is made to ensure that the front and rear of the cutter deck for proper cutting the cutter deck is cutting at the height indicated on the performance.
Section 6 Check the cutter deck cutting height by placing the B. 4" (factory setting), 4-1/4" or 4-1/2" Position - (See lanyard pin in the 3" position on the cutting height Figure 6-9). For general purpose cutting. This gives the index.
Section 6 ELECTRIC CLUTCH ADJUSTMENT ADJUSTMENT NUTS The electric clutch serves two functions in the operation of the mower. In addition to starting and stopping the power flow to the cutter blades, the clutch also acts as a brake to assist in stopping blade rotation when the PTO is switched off or the operator presence circuit is interrupted.
Section 7 MAINTENANCE MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS HOURS PROCEDURE COMMENTS BREAK-IN 100 200 500 (FIRST 10) Check all hardware for tightness Check hydraulic oil level See paragraph 7.3 C h e c k a l l b e l t s f o r p r o p e r See paragraph 7.8 alignment Check hydraulic hoses for leaks...
Section 7 HYDRAULIC SYSTEM - IMPoRtANt - The hydraulic oil should be changed if you notice the presence of water or a rancid odor to the A. CHECKING HYDRAULIC OIL LEvEL hydraulic oil. The hydraulic oil level should be checked after the first 10 Park the mower on a level surface and stop the hours of operation.
Section 7 C. CHANGING HYDRAULIC OIL FILTER A. CHECKING ENGINE CRANKCASE OIL LEvEL ELEMENT The engine oil level should be checked after every 8 hours of operation or daily as instructed in the Engine Operator’s The hydraulic oil filter should be changed after every 500 Manual furnished with this mower.
Section 7 Use only an approved gasoline container. FUEL FILTER Never remove the gas cap or add fuel with the engine running. Allow the engine to completely cool before fueling. Never fuel the machine indoors or in an enclosed trailer. Never store the machine or fuel container where there is an open flame, spark or pilot light such as on a water heater or other appliances.
Section 7 BATTERY A. CHARGING THE BATTERY Refer to the battery charger’s manual for specific WARNING instructions. Under normal conditions the engine’s alternator will have no problem keeping a charge on the battery. If the battery Lead-acid batteries produce flammable and has been completely discharged for a long period of time, explosive gases.
Section 7 DRIvE BELTS B. BLADE SHARPENING All drive belts are spring-loaded and self-tensioning, - Note - however after the first 2, 4, 8 and 10 hours of operation, If possible, use a file to sharpen the blade. Using the belts should be checked for proper alignment and wear. a wheel grinder may burn the blade.
Section 7 - Note - 7.10 TIRES The front of the machine will have to be raised slightly to remove the blade bolt from the cutter Check the tire pressures after every 8 hours of operation spindle. or daily. Caster Wheels 25 PSI To install the new cutter blade, put the flat washer Drive Wheels...
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: • GC-STC-V, GC-STWC-61V (p/n 9057, p/n 9058) •...
Section 8 SHEET METAL COMPONENTS 18 19 7 8 20 Seat Assy. With Black Arm Rest STC 2008 BSMC...
Page 49
Section 8 SHEET METAL COMPONENTS Ref. Ref. Part No. Description Part No. Description 461918 Main Frame Assembly w/decals 424112 Bracket, Hour Meter 04001-73 Bolt, Hex Head 5/16-18 x 3-3/4” 482622 Seal 482632 Cushion, Back 04001-32 Bolt, Hex Head 3/8-16 x 1-1/4” 04019-04 Nut, Serr.
Section 8 STC FOLDABLE ROLL-OvER PROTECTION SYSTEM Seat Assy. With Black Arm Rest STC 2008 FOLDING ROPS...
Page 51
Section 8 STC FOLDABLE ROLL-OvER PROTECTION SYSTEM Ref. Part No. Description 9512 STC Foldable ROPS Accessory (incl. all items listed) 04001-145 Bolt, Hex Head 1/2-13 x 3-1/2” 04021-19 Nut, Center Lock 1/2-13 483412 Retractable Seat Belt 04040-13 Flatwasher, 1/2-.562 x 1.375 x .109" 481625-03 Thumb Screw, 5/16-18 NC x 3/4”...
Page 59
Section 8 STEERING COMPONENTS Ref. Part No. Description 482340 Grip, Control Lever 461386 Handle Bar (Includes item 1) 04001-32 Bolt, Hex Head 3/8-16 x 1-1/4” 04030-04 Lockwasher, 3/8” 04041-07 Flatwasher, 3/8-.391 x .938 x .105" 04040-15 Flatwasher, 5/16-.375 x .875 x .083" 04060-01 Roll Pin, Spring 5/32 x 3/4”...
Page 61
Section 8 BRAKE COMPONENTS Ref. Part No. Description 04019-06 Nut, Serr. Flange 1/2-13 48807 Spring 04001-08 Bolt, Hex Head 5/16-18 x 3/4” 04001-163 Bolt, Hex Head 1/2-13 x 3-3/4” 04001-52 Bolt, Hex Head 1/2-13 x 2-1/2” 04021-19 Nut, 1/2-13 Center Lock SEE NEXT PAGE FOR WHEEL MOTOR PART NUMBER IDENTIFICATION 04063-25 Key, Woodruff 5/16 x 1”...
Section 8 WHEEL MOTOR PART NUMBER IDENTIFICATION HYDRO-GEAR Part No. Model No.. Serial Number Range 483190 STC48V-19KAI E4600001 to E4601775 STC48V-19KAI-SS E6400001 to E6400045 STC48V-23CV E4700001 to E4700150 STC48V-26BS E4800001 to E4800600 STC52V-25CV E4900001 to E4900778 STC52V-27CV E6200001 to E6200220...
Section 8 REPLACEMENT DECALS AND INFORMATION PLATES MANUFACTURED UNDER ONE OR MORE 48404 OF THE FOLLOWING PATENTS: 4,487,006 4,885,903 4,920,733 4,967,543 4,991,382 4,998,948 5,042,239 5,117,617 5,133,176 5,826,416 5,832,708 5,865,018 6,192,666 6,766,633 6,892,519 6,996,962 7,065,946 7,197,863 PATENTS PENDING Hea vy- Duty FORWARD 483838 REvERSE...
Page 71
Section 8 REPLACEMENT DECALS AND INFORMATION PLATES Ref. Part No. Description 483407 Decal, Danger-Spinning Blades 483406 Decal, Warning-Rotating Blades 483199 Decal, 48V 483200 Decal, 52V 483201 Decal, 61V 483158 Decal, ROPS 483044 Decal, Patents 482100 Decal, Traction Control 481971 Decal, Heavy Duty Commercial 48404 Decal, Metalcraft - Made in USA 483402...
Cutter decks are warranted against cracking for a period of three (3) years. (parts and labor 1st and 2nd year; parts only 3rd year.) The repair or replacement of the cutter deck will be at the option of Scag Power Equipment. We reserve the right to request compo- nents for evaluation.
Page 74
(Piezas y mano de obra) (La garantía de dos años no incluye las conexiones, mangueras, las correas de transmisión). La reparación o el reemplazo de la bomba hidráulica o el motor hidráulico estarán sujetos a discreción de Scag Power Equipment.