SCAG STT-35BVAC - Manuals

III R Table of Contents BDP-16A HYDRAULIC PUMP ASSEMBLY ..................................................................................................... 72 BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN(29DFI & 35BVAC)) ................................. 74 BELECTRICAL SYSTEM (KOHLER &...

1 R Section 1 INTRODUCTION 1.1 Your mower was built to the highest standards in the industr y. However, the prolonged life and maximum efficiency of your mower depends on you following the operating, maintenance and adjustment instructions in this manual. If additional information or service is need...

2 R Section 1 SYMBOLS 1.4 SYMBOL DESCRIPTION SYMBOL DESCRIPTION Choke Transmission Parking Brake 48071S Spinning Blade On/Start Spring Tension on Idler Off/Stop Oil Falling Hazard Thrown Object Hazard Fast Slow Continuously Variable - Linear Cutting Element - Basic Symbol 481039S Pinch Point Cutting...

3 R Section 2 INTRODUCTION 2.1 Your mower is only as safe as the operator. Carelessness or operator error may result in serious bodily injur y or death. Hazard control and accident prevention are dependent upon the awareness, concern, prudence, and proper training of the personnel involved in the op...

4 R Section 2 DO NOT allow children to ride or play on the 3. machine, it is not a toy. Clear the area to be mowed of objects that could be 4. picked up and thrown by the cutter blades. DO NOT carry passengers. 5. DO NOT operate the machine under the influence of 6. alcohol or drugs. If the operator...

6 R Section 2 Lower the roll bar only when absolutely necessary. To lower the roll bar, remove the hairpin cotter pins 1. and remove the two (2) lock pins. See Figure 2-2. Lower the roll bar to the down position. 2. To raise the roll bar, lift the bar to the upright 3. position. Install the two (2) ...

7 R Section 2 WARNING Failure to properly inspect and maintain the seat belt can cause serious injury or loss of life. Check the full length of the seat belt webbing for 1. cuts, wear, fraying, dirt and stiffness. See Figure 2-3. Check the seat belt webbing in areas exposed to 2. ultra violet rays f...

8 R Section 2 MAINTENANCE CONSIDERATIONS & 2.6 STORAGE Never make adjustments to the machine with the 1. engine running unless specifically instructed to do so. If the engine is running, keep hands, feet, and clothing away from moving parts. Disengage drives, lower implement, set parking 2. brak...

9 R Section 2 SAFETY AND INSTRUCTIONAL DECALS 2.9 WARNING INSTALL BELT COVER BEFORE OPERATING MACHINE READ OPERATOR'S MANUAL 483402 390S0150i 481568 FORWARD REVERSE F R 483397 483406 483407 483402 484320 483407 483633 483425 483300 WARNING WARNING Operation of this equipmentmay create sparks that ca...

10 R Section 3 SPECIFICATIONS ENGINE 3.1 General Type ................................................................................................Heavy Duty Industrial/Commercial GasolineModel: Scag Model STT52V-27CH, STT61V-27CH .....................................................................

11 R Section 3 POWER HEAD 3.3 Drive System ............... Hydraulic Drive with Two Variable Displacement Pumps and Two Cast-Iron High Torque MotorsHydrostatic Pumps ..................................................................... Two Hydro-Gear™ 16 cc/rev. Pumps with Dump ValvesDrive Wheel Mot...

12 R Section 3 HYDRAULIC SYSTEM 3.5 Hydraulic Oil Filter ........................................................................................................ 10 Micron Spin-on Element TypeHydraulic Reservoir ...........................................................................................

13 R Section 4 CAUTION Do not attempt to operate this mower unless you have read this manual. Learn the location and purpose of all controls and instruments before you operate this mower. CONTROLS AND INSTRUMENT 4.1 IDENTIFICATION Before operating the mower, familiarize yourself with all mower and e...

14 R Section 4 Hourmeter (Figure 4-1). 6. Indicates the number of hours the engine has been operated. It only operates when the engine is running. Has preset maintenance reminders for engine and hydraulic system oil changes. Will start flashing scheduled maintenance 2 hours before preset time and co...

15 R Section 4 INITIAL RUN-IN PROCEDURES 4.3 FIRST DAY OF USE OR APPROxIMATELY 20 HOURS Check all belts for proper alignment and wear at 2, 4 1. and 8 hours. Change the engine oil and oil filter after the first 20 2. hours of operation. (See Section 7.4.) Check hydraulic oil level in reservoir. (See...

16 R Section 4 - IMPORTANT - Do not travel forward over a curb. The mower will hang up on the curb. Raise the deck and travel backwards over the curb at a 45 degree angle. (See Section 4.1, items 13 - 15, on page 14 for cutter deck raising descriptions.) REvERSE TRAvEL CAUTION Disengage power to the...

17 R Section 4 HILLSIDE OPERATION 4.7 WARNING DO NOT operate on steep slopes. To check a slope, attempt to back up it (with the cutter deck down). If the machine can back up the slope without the wheels slipping, reduce speed and use extreme caution. Under no circumstances should the machine be oper...

18 R Section 4 MOvING MOWER WITH ENGINE 4.11 STOPPED To “free-wheel” or move the mower around without the engine running, rotate the dump valve levers counter-clockwise. See Figure 4-4. Disengage the parking brake and move the mower by hand. When the machine is in the desired position, engage the pa...

19 R Section 4 Insert the lanyard pin into the cutting height index at 3. 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. A deck height decal is located on the cutting height i...

20 R Section 4 TOWING (OPTIONAL HITCH 4.16 ACCESSORY) NEVER allow children or others in or on towed 1. equipment. Tow only with a machine that has a hitch designed 2. for towing. Do not attach towed equipment except at the hitch point. Follow manufacturer's recommendations for weight 3. limit for to...

21 R Section 5 CONDITION CAUSE CURE STRINGERS - OCCASIONAL BLADES OF UNCUT GRASS Width of Deck SGB020 Low engine RPM Run engine at full RPM 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 plugg...

24 R Section 6 PARKING BRAKE ADJUSTMENT 6.1 WARNING Do not operate the mower if the parking brake is not operable. Possible severe injury could 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 th...

25 R Section 6 TRAvEL ADJUSTMENTS 6.2 Neutral or tracking adjustments will need to be made if: A. The steering control levers are in the neutral position and the machine creeps forward or backward. See Neutral Adjustment on page 25 (next procedure). B. The steering control levers are in the full for...

26 R Section 6 Actuate the steering control levers forward and 6. reverse several times and return them to the neutral position. Check that the drive wheels remained in neutral and 7. readjust if necessary. Check that the steering control levers hit the stop 8. before the pumps reach full stroke. Ad...

27 R Section 6 BELT ALIGNMENT 6.5 Belt alignment is important for proper performance of your Scag mower. If you experience frequent belt wear or breakage, see your authorized Scag service center for belt adjustment. CUTTER DECK ADJUSTMENTS 6.6 Cutter deck level, pitch and height are set at the facto...

28 R Section 6 - NOTe - To prevent the cutter deck from teetering, all four (4) cutter deck hanging chains must have tension on them. If all four chains do not have tension on them and the deck teeters, you must readjust the cutter deck as outlined in the procedures above. All measurements should be...

30 R Section 6 ELECTRIC CLUTCH ADJUSTMENT 6.8 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 ope...

31 R Section 7 MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS 7.1 HOURS PROCEDURE COMMENTS BREAK-IN (FIRST 10) 8 20 40 100 200 500 X Check all hardware for tightness X Check hydraulic oil level See paragraph 7.3 X C h e c k a l l b e l t s f o r p r o p e r alignment See paragraph 7.8 X Check coo...

32 R Section 7 MAINTENANCE CHART - RECOMMENDED SERvICE INTERvALS (CONT'D) HOURS PROCEDURE COMMENTS BREAK-IN (FIRST 10) 8 40 100 200 500 X Apply grease to fittings See paragraph 7.2 X Check hardware for tightness X Change engine oil filter See paragraph 7.4 X Check hydraulic oil level See paragraph 7...

33 R Section 7 GREASE FITTING LUBRICATION LUBRICANT / INTERVAL LITHIUM MP WHITE GREASE 2125( 40 HOURS / WEEKLY ) CHASSIS GREASE( 100 HOURS / BI-MONTHLY ) CHASSIS GREASE( 200 HOURS / MONTHLY ) 4 1 6 3 5 7 2 CHASSIS GREASE( 500 HOURS / YEARLY ) 390S0145-1 1 8 4 3 9 5 9 2 Lubrication Fitting Points Fig...

34 R Section 7 - IMPORTANT - The hydraulic oil should be changed if you notice the presence of water or a rancid odor to the hydraulic oil. Park the mower on a level surface and stop the 1. engine. Place a suitable container under the hydraulic oil 2. filter. Remove the fill cap from the reservoir a...

35 R Section 7 STT99CEC ENGINE OIL FILTER DRAINPLUG Drain Plug and Oil Filter Location Figure 7-5. C. CHANGING ENGINE OIL FILTER After the first 20 hours of operation, replace the engine oil filter. Thereafter, replace the oil filter after every 200 hours of operation or every month, whichever occur...

36 R Section 7 E F 1/4 1/2 3/4 . . . . . FUEL LEVEL FILLER NECK INSERT C.A.R.B. / ePA Phase 3 Fuel Level Figure 7-6. To avo i d p e r s o n a l i n j u r y o r p r o p e r t y d a m a g e, u s e extreme care in handling gasoline. Gasoline is extremely flammable and the vapors are explosive. Extingui...

37 R Section 7 - NOTe - In extremely dusty conditions it may be necessary to check the element once or twice daily to prevent engine damage. Unhook the clamps securing the air cleaner cover to 1. the air filter canister. Remove the air cleaner cover and set aside. Remove the air cleaner and inspect....

38 R Section 7 WARNING BATTERIES PRODUCE ExPLOSIvE GASES. Charge the battery in a well ventilated space so gases produced while charging can dissipate. Charging rates between 3 and 50 amperes are satisfactory if excessive gassing or spewing of electrolyte does not occur or the battery does not feel ...

39 R Section 7 SGB033 Angle Blade Back Do Not Cut In X Must NOT Exceed 1/3 Blade Width x 30 Blade Sharpening Figure 7-8. Check the balance of the blade. If the blades are out 2. of balance, vibration and premature wear can occur. See your authorized Scag dealer for blade balancing or special tools, ...

40 R Section 7 CUTTER DECK GEARBOx 7.11 A. CHECKING LUBRICANT LEvEL CAUTION The cutter deck gearbox can reach high operating temperatures. Allow the cutter deck gearbox to cool before servicing. The fluid level in the cutter deck gearbox should be checked after every 100 hours of operation or bi-wee...

41 R Section 7 Replace the radiator cap. Push down on the cap and 3. turn clockwise until it stops. - NOTe - The cooling system should be flushed and the coolant replaced every 500 hours of operation or annually. See your Scag dealer for proper coolant replacement. B. CLEANING THE RADIATOR DEBRIS SC...

43 R Section 8 SCAG APPROvED ATTACHMENTS AND ACCESSORIES 8.1 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-STT (p/n 9059, 9060, 9039) • GC-STT-CS (p/n 9063, 9064, 9041) • M...

45 R Section 8 52v CUTTER DECK Ref. No. Part No. Description Ref. No. Part No. Description 123456789101112 131415161718192021222324252627282930313233343536373839404142434445 46185904003-4004019-04481625-0148163204003-2642247804017-2704043-0604021-0546184504001-1104001-1204021-2204020-0945124004001-4...

54 R Section 8 Ref. No. Part No. Description 12345 67 8910 11 1213 929204001-17804040-11483594482950482945482946482940482943482948482942482952482944482948482941 04001-12483440 Suspension Seat Assembly w/seat beltBolt, Hex Head 7/16-20 x 1”Flatwasher, 7/16-.500 x 1.25 x .083Retractable Seat Belt Armr...

LIMITED WARRANTY - COMMERCIAL EqUIPMENT 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 an...

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