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Gravely 915150 ZT-50 - page 1
Owner/Operat or Manual Manuel du P ropriét aire/Util isateur ZT ™ 04699200B • 4/14 Printed in USA E10 The use of any gasoline exceeding 10% ethanol (E10) or 10% MTBE will v oid the product warra nty. L’utilisation d’une essence con tenant plus de 10% d’éthanol (E10) ou de 10% de MTBE annulent l a garantie. Models 915146 – ZT 34 (SN 03 ...
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Gravely 915150 ZT-50 - page 2
EN - 2 SAFET Y . . . . . . . . . . . . . . . . . . . . . . . . . . 4 ASSEMBL Y . . . . . . . . . . . . . . . . . . . . . . 1 1 CONTROLS AND FEA TURES . . . . . . . 13 OPERA TION . . . . . . . . . . . . . . . . . . . . . 1 4 MAINTENANCE SCHEDULE . . . . . . . . 20 SERVICE AND ADJUSTMENTS . . . . . 22 STORAGE . . . . . . . . . . . . . . . . . . . . . ...
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Gravely 915150 ZT-50 - page 3
EN - 3 PRODUCT REGISTRA TION The Gravely dealer must regis ter the product at the time of purchase. Registering the product will help the company process warranty claims or contact you with the latest service information. All claims meeting requirements during the limit ed warranty period will be honore d, whether or not t he product registration c ...
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Gravely 915150 ZT-50 - page 4
EN - 4 SAFETY ALERTS The safety alert symbol is used in decals and with this manual. Understand the safety message. It contains important information about personal safety . NOT A TIONS NOTE: General referenc e information for proper operation and maintenance pract ices. IMPORT ANT : S pecific pr ocedures or information required to prevent damage t ...
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Gravely 915150 ZT-50 - page 5
EN - 5 07800401 P 07800403 KEEP HANDS and FEET A WA Y 02988100 2 7 4 6 1 3 5 2 Figure 2 1. DANGER! Discharge Hazard - NEVER oper ate unit without discharge chute in operating position. Thrown objects can cause injury or damage. Do not operate mower unless all guards are in operating position or bagger is attached. 2. DANGER! Discharge Hazard - NEVE ...
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Gravely 915150 ZT-50 - page 6
EN - 6 Keep children and others away from unit while unit is in operation. Keep feet and hands away from all rotating or mov ing par ts. DO NOT step or stand in this area. 3. DANGER! DANGER! Read and understand the operator ’s manual before operating unit. 3.1 Dis memberm ent Haza rd T o av oid dismemberment hazard do not put hands near rotating ...
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Gravely 915150 ZT-50 - page 7
EN - 7 Read owners m anual before servicing or making adjustments to unit. Set parking brake. Remove key and disconnect spark plug before servicing or making adjustments to unit. 3.5 Bys t ander Haz ard DO NOT operate the unit in the presence of bystanders. Do not carry passengers. Look behind when operating the unit i n reverse. 3.6 Loss of T ract ...
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Gravely 915150 ZT-50 - page 8
EN - 8 EMISSION CONTROL SYS TEM This equipment and/or its engine may include exhaust and evaporat ive emissions cont rol system components required to meet U.S. Environmental Protection Agenc y (EP A) and/or California Air Resources Board (CARB) regulations. T am pering with emission controls and components by unauthorized personnel may result in s ...
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Gravely 915150 ZT-50 - page 9
EN - 9 Protect eyes, face and head from objects that may be thrown f rom unit. Wear appropriate hearing protection. Always wear safety goggles or safety glasses with side shields when operating mower . Avoid sharp edges. Sharp edges can cut. Moving parts can cut of f fingers or a hand. AL WA YS keep hands and feet away from all rotating part s duri ...
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Gravely 915150 ZT-50 - page 10
EN - 1 0 Do not use hitch with bagger at tached. Do not use on steep hills or slopes. Do not park on hills when trailer is attached. Do not use with any ground engaging equipment. NEVER allow children or others in or on towed equipment. On slopes, the weight of the towed equi pment may cause loss of traction and loss of control. T ravel slowly and ...
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Gravely 915150 ZT-50 - page 11
EN - 1 1 S top and inspect equipment if you strike an object or if there is an unusual vibr ation. Repair , if nec essary , before restarting. Never make adjustments or repairs wit h the engine running. Mower blades are sharp and can cut you. Wrap the blade(s) or we ar gloves, and use extra caution when servicing them. NEVER weld or straighten m ow ...
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Gravely 915150 ZT-50 - page 12
EN - 1 2 Check T ire Press ure See "SPECIFICA TIONS" on page 34. Level M ower Deck See “LEVELING AN D AD JU STING PI TC H OF MOWER DECK” on page 23. Fill Fuel T ank Fill fuel tank. DO NOT OVERFILL! See "FILLING FUEL T ANK" on page 17. Check Safety Int erlock Sys tem See "Safe ty Interlock Syst em" on page 14. Check ...
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Gravely 915150 ZT-50 - page 13
EN - 1 3 1. Ignition Switch 2. PTO Switch 3. Seat 4. Fuel Level 5. Steering Levers 6. Fuel T ank 7. Mower Lift Pedal 8. Mower Deck 9. Discharge Chute 10. Parking Brake Lever 1 1. Throttle/Choke L ever 12. Sea t Adjustment Lever (915148, 150, 170, 178, 180) 13. Height of Cut Selector Lever 14. Washout Port (915148, 150, 170, 178, 180) CONTROLS AND F ...
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Gravely 915150 ZT-50 - page 14
EN - 1 4 CONTROLS AND FEA TURES See Figure 4 for all controls and f eatures locations. Safety Interloc k System Perform the following tests to ensure the safety interlock system is working p roperly . If the unit doe s not perform as stated contact your Gra vely dealer for repairs. Ignition Sw itch Operate ignition switch with a remov able key . Ig ...
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Gravely 915150 ZT-50 - page 15
EN - 1 5 Throttle/Choke Lever (915146, 168) Choke (1) – Us e to start a cold engine. Push throttle lever past detent for choke to start a cold engine. Pull throttle lever back past detent to close choke for a warm engine. Fast (2) – Increases engine speed. Slow (3) – Decreases engine speed. Park ing B rak e Le ver Engages (2) and disengages ( ...
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Gravely 915150 ZT-50 - page 16
EN - 1 6 Seat Adjustm ent (915148, 150, 170, 178, 180) (Figure 6) Push lever back and slide seat forward or backward to the desired position. Release lever to lock seat in position. Seat Adjustm ent (915146, 168) 1. Tip the seat forward. See “TIPPING SEA T FORW ARD” on page 22. 2. Loosen mounting hardw are and slide seat forward or backward to ...
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Gravely 915150 ZT-50 - page 17
EN - 1 7 NOTE: If water leaks excessively from hose coupling onto top of deck, coupling may not be fully seated onto washout port. T urn off water supply and repeat s teps 4 through 6. Use firm pressure while installing coupling onto washout port. 7. From the operators seat, start the engine and engage the PTO. Allow unit to run as needed - typical ...
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Gravely 915150 ZT-50 - page 18
EN - 1 8 Fuel S t abiliz er Gasoline left in the fuel sy stem for ext ended periods without a stabilizer w ill deteriorate, resulting in gum deposits in the system . These deposits can dam age the carburetor and the fuel hoses, filter and tank. Preven t deposits from forming in t he fuel system during storage by adding a quality fuel stabilizer to ...
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Gravely 915150 ZT-50 - page 19
EN - 1 9 MOVING UNIT MANUALL Y (Figure 8) Pull the bypass lever out and lock it in place, and then release the p arking brake to push the unit by hand. Push the by pass lever in to dr ive the unit normally . NOTE: There are two bypass levers; one on each side of the unit. W ARNING: DO NOT disengage or bypass transmission and coast downhill. Figure ...
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Gravely 915150 ZT-50 - page 20
EN - 2 0 IMPORT ANT : Proper maintenance can prolong the life of unit. The following chart shows the re commended serv ice schedule. Refer to the maintena nce instructions in the Engine Manual for additional information. NOTE: T o have full access to the engine, the seat must be tipped forward "T IPPING SEA T FORW ARD" on p age 22 and the ...
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Gravely 915150 ZT-50 - page 21
EN - 2 1 Each Us e Follow Engine Manual Mainten- ance Schedule Perform scheduled engine maintenance. Refer to Engine Manual for detailed instructions. NOTE: T o drain the oil, remove oil drain cap and attach the oil drain hose, supplied in the lit pack, to the drain plug. Rotate the drain t o the lef t to allow oil to drain. T urn the drain to the ...
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Gravely 915150 ZT-50 - page 22
EN - 2 2 TIPPING SEA T FORW ARD (Figure 9) Move steering levers to neutral pos ition and rotate handles outward. T i p seat forward. MOWER DE CK REMOV AL AND INST ALLA TION Remove (Figure 10) 1. Remove PTO belt from the engine drive pulley . See “REPLACING PTO BEL T” on page 29. 2. Disconnect drag link from the front dec k bracket. 3. Disconnec ...
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Gravely 915150 ZT-50 - page 23
EN - 2 3 LEVELING AND ADJUSTING PITCH OF MOWER DE CK NOTE: Adjust on a level surface, with the tires inflated to the correct air pressure. See “SPECIFICA TIONS” on page 34. Three measure ments are required to lev el and adjust the pitch of the mower deck. 1. The distance from the mower blades to the ground. 2. The forward pitch of the mower bla ...
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Gravely 915150 ZT-50 - page 24
EN - 2 4 Adjusting The Mower Deck T o Adjust Mower Blade Height And Pitch (Figure 14) NOTE: Adjusting the mower deck will adjust the height and pi tch of the mower blades. 1. Adjust the trunnions first and re-take the three measurements required to level and adjust the pitch of the m ower deck. These measurem ents are: a. The distance from the mowe ...
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Gravely 915150 ZT-50 - page 25
EN - 2 5 1. Re move mower b lade from unit. See “REPLACI NG MO WE R BLADE” on page 24. Gravely recommen ds having m ower blades sharpened by a professional. Contact your Gravely dealer . Discard mower blade if (Figure 16 ): • more than 1/2" (1.27 c m of metal is removed. • the air lift erosion area is eroded. • the mower blade is ben ...
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Gravely 915150 ZT-50 - page 26
EN - 2 6 4. R emove nut and bolt securing battery hold down bracket. Save for reinstallati on. NOTE: The bolt securing the battery is mounted through t he underside of the frame. Place hand beneath frame to catch loose bolt. 5. R emove battery f rom unit. Inst all Fa ctory-Inst alled Battery (Figure 17) 1. Tip seat forward. See “T IPPING SEA T FO ...
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Gravely 915150 ZT-50 - page 27
EN - 2 7 Cleaning Battery a nd Battery Cables (Figure 17) 1. Tip seat forward. See “T IPPING SEA T FORW ARD” on p age 22. 2. Disconnect negative (–) cable first, then positive (+) cable. 3. Clean battery cable ends, negative (–) terminal, and positive (+) terminal with a wire brush and rinse with a weak baking soda solution. 4. Connect posi ...
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Gravely 915150 ZT-50 - page 28
EN - 2 8 ADJUSTING STEE RING LEVERS (Figure 21) IMPORT ANT : Adjust each steering lever equally . NOTE: When adjusting steering l evers for the first time it is recommended that you make adjustments in the fol lowing order . 1. Adjust S teerin g Lever Height 1. Remove mounting hardware that attaches the handlebars to the upper control arm. Move han ...
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Gravely 915150 ZT-50 - page 29
EN - 2 9 REPLACING PTO BEL T Remove (Figure 24) 1. Lower m ower deck to the ground. 2. R emove belt covers from mower deck. 3. Ro tate idler arm clockwise until tension is removed from PTO belt. 4. R emove PTO belt from left mower deck pulley . 5. Slowly r elease idler arm until tens ion is removed f rom idler spring. 6. R emove PTO belt from mower ...
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Gravely 915150 ZT-50 - page 30
EN - 3 0 Inst all (Figure 24) NOTE: Do not install PTO belt on left mower deck pulley in step 1. 1. Install PTO belt on engine drive pu lley and mower deck. 2. Ro tate idler arm clockwise until PTO belt can be rout ed around left mower dec k pulley . 3. Slowly releas e idl er arm until idler pulley rests firmly against PTO belt. 4. Install belt cov ...
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Gravely 915150 ZT-50 - page 31
EN - 3 1 IMPORT ANT : NEVER store the engine with fuel in the fuel tank inside of a building with potential sources of ignition. Add Fuel S t abili zer 1. Drain fuel f rom fuel tank. 2. Allow the engine to run until it s tops. Turn engine OFF when it begins surging to avoid engine damage. 3. Add fuel stabilizer to fuel, following the manufacturer ? ...
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Gravely 915150 ZT-50 - page 32
EN - 3 2 TROUBLESHOOTING PROBLEM PROBABLE CAUSE CORRECTION Engine will not crank/start. 1. Safety interlock system is not engaged or is faulty. 1. Check safety interlock system. See “Safety Interlock System” on page 14. 2. Fuel tank is empty. 2. Fill fuel tank. See “FILLING FUEL TANK” on page 17. 3. Discharged battery. 3. Charge battery. Se ...
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Gravely 915150 ZT-50 - page 33
EN - 3 3 Unit moves with engine off and parking brake engaged. 1. The parking brake needs adjustment. 1. Cont act your Gravely dealer. 2. Faulty parking brake. 2. Contact your Gravely dealer. Unit does not travel in a straight line. 1. Incorrect tire pressure. 1. Check tire pr essure. See “SPECIFICA TIONS” on page 34. 2. Steering lev ers need a ...
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Gravely 915150 ZT-50 - page 34
EN - 3 4 SPECIFICA TIONS Model Number 915146 915148 915150 915168 Model ZT 34 ZT 42 ZT 50 ZT 34 CARB Engin e Ty p e Briggs & S tratton Kawasaki Briggs & S tratton Engine Displaceme nt in. 3 (cc) 30.51 (500) 44.3 (726) 30.51 (500) Governed RPM (May be different from maximu m RPM ) 3600 + 0 3600 – 100 Drive Forward Max. – m.p.h (k m/h) 6. ...
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Gravely 915150 ZT-50 - page 35
EN - 3 5 SPECIFICA TIONS Mode l Numb e r 915170 915178 915180 Mode l ZT 42 CARB ZT 42 ZT 50 Engine T ype Kawasaki Kohler Engine Displacement in. 3 (cc) 44.3 (726) 44.2 (725) Governed RPM (May be different from maxi mum R PM) 3600 + 0 3600 – 100 Drive Forward Max. – m.p.h (km/h) 6.0 (9.6) Reverse Max . – m.p.h ( km/h) 3.0 (4.8) T urning Radius ...
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Gravely 915150 ZT-50 - page 36
Consumer 2013 EN - 36 Consumer Mow ing Equip ment Limited W arranty Ariens Comp any (Ar iens ) warra nts to the origina l purchaser t hat A riens, Gr avely a nd Co untax brand lawn a nd gard en consu mer pro ducts purcha sed on or af ter 1 /1/201 3 will be free from defe cts in mate rial and wo rkmans hip for the tim e period noted in the chart be ...
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Gravely 915150 ZT-50 - page 37
Consumer 2013 EN - 37 • T ranspor t the produ ct to and from the plac e of war ranty s ervice at ow ner's ex pense. • H ave the wa rranty serv ice perform ed b y an au thorized Ariens, Grav ely or Co untax se rvice repres entative. To Find an Authorized Service Representative: Exclusions – Items Not Covered by This Warranty • P arts th ...
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Gravely 915150 ZT-50 - page 38
Gravel y 655 Wes t Rya n Street Bril lion, WI 54110 920-756-468 8 Fax 920-7 56-240 7 www.gravely.com www.ariens.com. au ...
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