Walker MDD manual

OWNER’S MANUAL Safety , Assembly , Ope rating, and Maintenance I nstructions Model MDD (20.9 HP Diesel) Please Read and Save These Instr uctions Effective Da te: 02-15-0 5 For Safety , Read All Safet y and Op eration P/N 700 0-8 Instruc tions Pr ior to O peratin g Mac hine ™[...]

For eword Thank you. . . for purchasi ng a W alker mower . Every effort has been ma de to provi de you with th e most reliabl e mower on the market, and we are sure y ou will be among our many satis fied cu stom- ers. If for any rea son this produ ct does not perform to your expectation s, please c ontact us at (970) 221-5614 . Every c ustomer is i[...]

T able of Conten ts General Informat ion ________ ______ __ 1 HIGHLIGHTED INFORMATION ________ _____ 1 GLOSSARY __________ __________ ______ __ 1 IDENTIFYING NUMBER LOCATIONS ______ __ 1 ENGINE SERIAL NU MBER LOCATION ______ 2 SERVICING OF E NGINE AND DRIVETRAIN C OMPONENTS _________ _____ 2 Specificati ons ______ __________ ______ __ 3 ENGINE ____[...]

T able of Conten ts Maintenan ce Instr uctions _________ _ 46 MAINTENANCE SCH EDULE CHART ___ ____ 46 IMPORTANT TIPS FOR CARE OF THE KUBOTA ENGINE ____ __________ _ 47 Fuel System ________ __________ ______ _ 47 Starting/Stopping ____ ______ _______ ____ 47 Cooling System ________ _______ ______ _ 47 Air Cleaner System ________ _______ ____ 47 Oil [...]

General Information 1 HIGHLIGHTED INFORMA TION W alker M anufactur ing recom mends that an y ser- vice r equir ing sp ecia l tr aini n g or t ools b e per form ed by an a uthorized W alker Mower Dealer . There a re several genera l pract ices to be a ware of in the area of sa fety . Mos t ac c idents as so ci ate d wit h the oper- atio n or main te[...]

General Information 2 T ract or Serial N umber Locati on Mower Dec k Serial Nu mber Locat ion ENGINE SERIAL NUMBE R LOCA TION Refer to the engi ne manual that ac companie s this manual for the location of the engine ser ial numbe r . For the mower model c overed by this manual, an en- gine ma nual i s avail able cov ering the Kubota D72 2 diesel en[...]

Specifications 3 MODEL MDD E N G I N E Manufac turer/Mo del Kubota D722, 3 Cyl., Diesel (Li quid Cool ed) Displac ement 44.0 cu. in. ( 722 cc) HP (@ 3600 RPM) 20.9 Max. RPM (No L oad) 3800 Gove r ned R PM 3600 Max. T orque [ft-lb (N ·m) @ RPM] 34 (46.1 ) @ 2600 Idle RPM 1000 ± 50 S park Plug T ype N/A S park Plug Gap N/A Crankc ase Capacity 3.1 q[...]

Specifications 4 MODEL MDD TRANSMISSION (continued) Serv ice Br ake Dynam ic Bra kin g t hro ugh H ydro sta tic T ransm issi on Parking Brake Mechanic al Pi n Lock i n Transmission G ear Neutral T ransmissi on Rele ase by M anual D ump V alv e Final D rive Gear Dr ive Ax le T ran smission Flu id Factor y Ser vice Mobil 1 Synth etic M otor Oi l (15W[...]

Specifications 5 MODEL MDD DIMENSIONS (T ractor and Mower)* Lengt h 91 in. ( 231 cm) Width 49 in. ( 124 cm) Heigh t 44 in . (1 12 cm ) Wheel B ase (Tractor) 42-1/4 i n. (107 c m) T read Width (T ractor) 29-3/4 i n. (76 c m) MOW ER D ECK Width of Cut S D/GHS 42 or 48 in. (107 or 122 c m) Cutting He ight 1 to 4 in . (3 to 10 cm) Height Adjustm ent 7 [...]

Specifications 6 MODEL MDD DRIVE BEL TS Engine PT O W alker P /N 7230 Jacksha ft Drive Gates 3VX355 ( P/N 6231) Ground Dr ive W alker P /N 7248 Blower (GHS Model ) Gates 3VX28 0 (P/N 723 4-1) GHS SYSTEM (Optional) Blower 4 x 10 x 1/4 in. (1 0 x 25 x 1 cm) T hree-Blad e Paddle Wheel ( Driven by Mower E ngine ) Blower Brake Band Brake (Works in Co mb[...]

Component Identification 7 Front Vi ew and Right Side View NOTE: Control Ide ntificati on shown in Operating Instructions se ction . Catcher Door Safety L atch Gras s Handli ng S ystem 9.5 Bus hel Catche r Ti l t - U p Latch Coun terweight S p ring and Pr otective Cover Deck S upport P ins and Heigh t Adju stment Hitch Pins Anti- Scuf f Roller T r [...]

Component Identification 8 Lef t H and Drive Whee l Instrum ent Pa nel Bo x (Sho ck Mo unte d) Inst rument P anel Guard Catcher Li ft / Dump H andle Radiator Catcher Door Gas Spring Rem ovab le G ras s Catcher Screen (Not Visible) Catc her Exhau st Deflector Catcher Door Catcher Door Handle Dump Plate Anti-Scu ff Roller Coolant Recove ry T ank Radi[...]

Component Identification 9 Donald son Air C leaner Air C leaner Cover Radiator Guard Radiator GHS Bl ower RH Hydrostatic T r ansmis sion Neutral Safety Switc h Batter y Negative (-) Battery Cable Air Restrict ion I ndica tor Preclean er Tube Jacks haft PT O Gearbox Dipstick Tu r b i n e Preclea ner RH T r ansmis sion Lockout L ever PTO Clut ch Leve[...]

Component Identification 10 Exhaus t Manifol d Oil Fill Cap Alter nator W ater T emperature Gauge S ender The rmos tat Hous ing and The rmostat Radiator Screen (Remov able) Radiator Fa n and Shield Engine Stop Lever Link age (Fue l Shut-O ff V alv e) Throt tle Cont rol Linkage L ever Injectio n Pump Injecto rs Air In t a ke Hose Fuel T ank Cap Fuel[...]

Safety Instructions 11 Pay particu lar atten tion to any infor mation l abele d DANGER, W ARNIN G , CAUTION, IMPORT ANT , and NOTE in this man ual. W h e n y o u s e e t h e S a f e t y A l e r t S y m b o l ( ) , read, unde rst and, and follow the inst ructions. Fail- ure to compl y with safety i nstru ction s may re sult in perso nal in jury . Th[...]

Safety Instructions 12 6. Do not w ear lo ose fittin g clothin g that coul d get caught i n moving parts. Do not operate th is machin e while wearing s horts; always w ear adequate protective clothing, including lon g pants. Wearing safet y glasse s, safety shoes, and a he lmet is adv isable and requ ired by s ome local or dinances and ins urance r[...]

Safety Instructions 13 9. W atch for hole s, rocks, and roots in the terrai n and f or other hidden h azar ds. When mowin g tall gras s, mow h igher t han de sired t o exp ose any hidd en obstacles. Th en, clean the area and mow to the de sired he ight. 10. Avoid sudden st arts or stop s . Befor e backi ng the mac hine up, look to th e rear to b e [...]

Safety Instructions 14 MAINTENANCE 1. T o prevent ac cidental starting of the eng ine when ser vicin g or adjustin g the ma chine , re- move th e key from the ig nition switch and dis - connec t the elect rical plug on the fue l shut-off soleno id. 2. T o reduce fi re haza rds, kee p the engi ne free o f grass, l eaves, e xcessiv e grease , and di [...]

Safety Instructions 15 Adjacent to Blower Discharge C hute through Bod y (5804) SD Deck Di scharge Shield ( 5848) Front Body Ad jacent t o RH Steering Lever (7818) Hydrost at Oil Reservoi r (5810- 2) On Body Adjacent to Clutch Control Le ver (5806) Right Side of Front Body , Below Front Body Latch Release (7820) Rear Cros s Member of Front Body (88[...]

Safety Instructions 16 Instrument Panel (7 823-4) Fender , RH Side (7802) Catcher Door Hinge Ba r , LH and R H Side s (5868) Lef t Side of Operator Se at (7819) Right Side, Below Op erator S eat (7809) T op of Blower Housing (5819) Deck C arrier F rame (8653 ) Jackshaf t Support Adjacent to Dipstick (7827) Gear Ax le (5810-1) Deck Gearbox Co ver (5[...]

Asse mbly Instr uctions 17 SETUP INSTRUCTIONS W alk er Mo wers ar e shi pped p art iall y assem bled. After unc rating t he tra ctor an d mower deck, i nitial setup is requ ired. NOTE: During the proc ess of unpacking , any da m- aged or missing parts sho uld be note d and repor ted to the d eliverin g carri er immed iately (put in wri ting within [...]

Asse mbly Instr uctions 18 B att e r y C h a r g i ng 1. Charge the battery at 15 am ps for 10 minu tes. DO NOT exceed 20 amp s maximu m rec om- mended c harging rate. Char ge until s pecific gravi ty is at least 1.2 50. T otal ch arging tim e should not ex ceed o ne (1) h our . 2. After chargi ng the b attery , adju st the e lectrolyt e level to t[...]

Asse mbly Instr uctions 19 Deck Cast er Wheel In stallation NOTE: If se mi-pneumatic wheels are installe d, make sure the spacer w ashers fit over the spacer tube and are not caught between the fo rk and the end of the t ube. The washers sh ould move freely on the axle sp acer tube. 5. Grease the caster whee l bearings and caster pivot bearings - o[...]

Asse mbly Instr uctions 20 Tilt-Up S pring and Roller Wheel Inst allation on Rear D ischarg e Deck Mower De ck Ins t allation on T r actor Deck Installati on 1. Lightly gr ease each deck sup port arm ( 2) on the tractor . Refer to Mo wer Deck Installation phot o on next page for loc ation o f deck s upport arm. 2. Enga ge the d eck car rier frame t[...]

Asse mbly Instr uctions 21 6. Raise the fr ont mower body (instead of lifting the front of deck) and c lip the cou nterweigh t spri ngs to the rece pta cle on fr ont of bo dy . Lower the front bo dy to tension the springs. (Refer to Deck Counterw eight Spring Instal- lation photo.) Mower Deck I nstallation (P TO Shaft Connection) 7. With the cou nt[...]

Asse mbly Instr uctions 22 Deck Leve ling 1. Posi tion mow er on a smoo th, leve l surfac e. Set the cutti ng height to the highest position - 4 in. (102 mm) - for easy ac cess under the dec k to measur e blade h eight. Refer to ADJUSTING CUTTING HEIGHT in Operating Instructions . NOTE: A blo ck of wood cut 4 in. (102 mm) high is a convenient gauge[...]

Asse mbly Instr uctions 23 PREOPERA TING CHECKLIST Before operating the mower for the first time, and as a routi ne befo re dail y ope rations, it is impo rtant to make s ure the mower is proper ly pre pared and ready for opera tion. The follow ing is a l ist of item s to be che cked. (For a mower with freq uent o peration , some of the se items wi[...]

Asse mbly Instr uctions 24 CHEC K HYDROST A TIC TRAN SMISSION OIL LEVEL Refer to LUBR ICA TIO N for Checki ng Hy dros t ati c T ransmis sion Fluid Level in Maintenance Instruc- tions . CHECK BA TTERY EL ECTROL YTE LEVE L Refer to CHEC KING/SERVICING the Battery in Maintenance Instructions . C HECK FUNCTIONS OF INSTR UMENT P ANEL AND WA RNING HORN T[...]

Operatin g Instruc tions 25 CONTROL I D E N TIFIC A TION, L O C A T I O N , AND FUN C T I O N Op e r a t ing Con t r o ls E ngine T h r o t t le The thrott le control lever (red kno b) is locat ed on the left side of the s eat and is used t o cont rol engi ne speed. Movi ng the lever fo r wa rd towa rd the FA S T positio n inc reases en gine s peed[...]

Operatin g Instr uctions 26 Forward Spe ed Control (FSC) Forwa rd S peed Contro l (FSC ) has two f unctio ns: One is to set forward tr avel speed , and the other is to establis h the NEUTRAL-P ARK posit ion. When the FSC lever is mo ved in to the FORW ARD posi- tion, a fr iction lo ck holds any forwa rd speed setting from 0 to 5 mph (0 to 8 km/h) .[...]

Operatin g Instr uctions 27 T ransmission Lockout Levers The trans missi on lockout levers dise ngage the hy - drostatic transm issons . By lifting the lev er on to p of the tra nsmiss ion and lockin g it into place with th e locko ut cam, the hydr ostatic transmi ssions are re- leased to permi t freewhee ling. B y relea sing the cam and lo wering [...]

Operatin g Instr uctions 28 THROTTLE BLADE CLUTCH (PT O) Pull Up to Engag e PA R K I N G BRAK E LEFT WHEEL STEERING LEVER Reverse Drive Wheel M otion Positi on RIGHT WHEEL STEERING LEVER The For ward S peed Control a lso Establis hes the Neutral-Park Position of the Steering Levers FOR W ARD SP EED CON TRO L LEV ER ( FS C) Full Forward Ground S pee[...]

Operatin g Instr uctions 29 Instrument Panel Instrument Panel This ill ustrati on show s the confi guration of the swit ch es a nd ind ica tor s loca ted on th e instr ument panel. Light S witch (Optiona l) Hourm eter Circuit B reaker - 10 Am p (Headl ights, Saf ety Interl ock Sw itch Sy stem, Fuel S olenoid Ho ld, Power fil ® Motor - GHS Only , ?[...]

30 Operatin g Instr uctions Vo l t m e t e r The voltme ter displ ays battery and chargi ng system voltage. An indic ation of low or high voltage (the red area) i ndicates an electrical s ystem failure. The cause of the failure sh ould be deter mined and cor- rected. W ater T emperature Gauge The wate r temper ature gau ge monitor s engin e cooling[...]

Operatin g Instr uctions 31 Light Switch (For Optional Light s) Opera tes headl ig hts (when ins talle d). Hourmeter The hour meter di splays operating time accumu- lated whi le the ignit ion switc h is in the ON posit ion . The hourme ter prov ides main tenanc e reminders after certain hou rs of op eration. The hour meter screen wi ll start flashi[...]

Operatin g Instr uctions 32 1. Before attempting to start the engine, mak e sure the ope rator is in the sea t, the Forwar d S peed Control i s in NEUTRAL-P ARK posit ion, and t he blade clutc h and parking brak e are DISENGAGED. NOTE: Release p arking brake t o prevent extra load on the st arter if t he transmission ne utral is slightly out of adj[...]

Operatin g Instr uctions 33 ADJUSTING GROU ND SPEED AND STEERING IMPORT ANT : If t he DSD52 or DSD62 Mower deck is installe d on the t ractor , make sure the dolly wheel is retracted BEFORE mo ving. 1. Move the FS C out of NEUTRAL-P ARK positi on to the desi red forward s peed. DO NOT hold fo rwar d on s tee ring le vers. I t is n ot necess ary to [...]

Operatin g Instr uctions 34 Correct Operator Hand Position on the Controls 3. Reve rse direc tion of the m ower by pu lling both lever s backw ard. NOTE: Smoo th action on the steer ing levers will produce smooth mower operation . Remem- ber to keep the engine and grou nd speed slow until learning the control r esponse. 4. T he FS C ma y be adj ust[...]

Operatin g Instr uctions 35 Blade Clutch Enga ged Blade Clutch Disengaged STOPPING THE MACHINE 1. Slow th e eng ine to a fa st idle ; put the throt tle i n the 1/2 th rottle positio n. 2. Pull the s teering le vers to the NE UTRAL position and then move the FSC lever backward to the N EUTRAL-P ARK positio n. 3. Disenga ge the bla de clutc h. IMPO R[...]

Operatin g Instr uctions 36 Cutting he ight is adjusted by positi oning the four re- tainer hit ch pin s in a series of se ven ver tical holes o n the deck support pins. Lift handles have been pro- vided on each end of the deck to assist in raising th e deck w hile p ositioning the hit ch pins . Cuttin g heights r ange from 1 in. (25 mm) [t op hole[...]

Operatin g Instr uctions 37 RECOMMENDA TIONS FOR MOWING IMPORT ANT : Oper ate th e eng ine at full speed when mowin g, to allow the engine to prod uce full horse power and to incr ease efficiency of the engin e coolin g syst em. • Keep the m ower d eck and di scha rge chute clean. • Mow with shar p blades . A dull b lade tear s the grass ( resu[...]

Operatin g Instr uctions 38 RECOMMENDA TIONS FOR TIL T -UP DEC K OPERA TION/TRANSPORT T o a void p otential de ck an d/or trac tor damag e while using t he tilt -up deck , the follo wing r ecommend a- tio ns ar e of fe red: • Do not move the tracto r with the dec k in the til t- up posi tion si nce both th e roller wheels (on the ba ck of t he de[...]

Operatin g Instr uctions 39 GRASS HANDLING SYSTEM (GHS) GHS Model Only PTO and Blade Gear Drive Rear Di scharge Mower Deck Deck Discharge Chute Blower Body Ch ute Assemb ly Powerf il ® Delivery S po ut Dump Handl e Grass Cat ch er Catcher Door Exhaus t Deflector Grass-Pa k ® V a ne Swi tc h Exhaus t Scree n (Removab le) Catcher Door Safety L atch[...]

Operatin g Instr uctions 40 General Information The Gras s Handl ing Sys tem (GHS) c onsists of a rear d ischarge m ower deck connecte d to a 10 in. (25 cm) blo wer and a rea r mounted gr ass catc her with 7.0 bu shel (24 6 liter s) capaci ty or opti onal 9. 5 bushel (335 l iters) capaci ty . The GH S blower oper- ates an y tim e the mower blade c [...]

Operatin g Instr uctions 41 Clogging Checklist In case of clo gging, ther e will be a distinct change in the sound of the blower, i.e., the blower s ound will st op. Also, t he mower deck wil l begin to leave a trail of grass clippi ngs. When this occurs, stop th e engine, d isconne ct the el ectrical p lug on the fuel shut-o ff soleno id, a nd ma [...]

Operatin g Instr uctions 42 • Check th at the openings in the removable air exhaust screen in the grass catcher are no t plugged . If the scree n is clog ged, refer to Cle aning the GHS Exha ust Screen in this section . Remember, anything that restricts ai rflow or material flow along the entire path from the mower deck to the gra ss catcher can [...]

Operatin g Instruc tions 43 G r a s s C a t c h e r S c r e e n R e mo v a l for Cl e a ning Dumping the C a t c h e r For dum pi ng, th e c at ch er e ither tailg ate du mps int o a dispo sal are a or du mps into the opt ional dump bag. T he du mp bag i s a reusabl e nylon fabric bag de si gn ed to c onveniently move gras s clippin gs from the cat[...]

Operatin g Instr uctions 44 3. Hook the bottom of the ba g ove r the rear bumper while li fting on the handl e strap. 4. T ilt the c atcher b ack to du mp int o the bag by lif ting on the catcher lift handle on the lower front cor ner of th e catche r with the one hand while co ntinuing to hold up on the ba g strap with the other hand. Re fer to p [...]

Operatin g Instr uctions 45 Power Dump Component s Fork Power Dump Ram Actu ator Rear Body Panel, R H Lift Channel Cable Guide Gras s Catc her Door Actuat or Arm Catcher Door Gas S pring Catcher Door Cable Rod Guide Cabl e Assem bly Rear B ody Panel, L H Gas S pring Actuato r Mount Assemb ly Dog Leg Assem bly Rubber Bumper[...]

Mainten an ce Instruction s 46 MAINTENANCE SCHED ULE CHART - RECOMMENDED SERVICE INTERV ALS - MODEL MDD Service Item Dail y 25 Hou rs 100 Hours 200 Hou rs Y ear ly Every 2 Y ears Ref. Page Check Engine Crankcase Oil Level x 48 Check Coolant Level in Radiator and Overflow T ank x6 0 Clean Radiator Screen and Cooling Fins* x 57 Check Security of Air [...]

Mainten an ce Instruction s KUBOT A TIP S 47 IMPORT ANT TIPS FOR CARE OF THE KUBOT A ENGINE Fuel System • Fuel must be cl ean - free from water , dirt, and or- ganic m aterial. Fuel co ntamination will grea tly shor t- en th e life of th e fuel injectio n pump and in jectors . • Change fue l filt ers on a r egula r basis and when contaminati on[...]

Mainten an ce Instruction s LUBRICATION 48 LUBRICA TION Proper lub ricati on is an important mainten ance pro- cedur e. It reduc es wear an d make s the ma chin e quie ter and ea sier to operate. Engine Oil Engine Break- In Oil No sp ecial br eak-in oil i s requir ed. The engine is servic ed with 10W-30, Se rvice Clas s SG oi l from th e fact ory .[...]

Mainten a n ce Instru c tions LUBRICATION 49 Oil D r a i n L o c a tion ( v i e w f r om l e f t s i de of t r a c t o r ) 4. Before removi ng the o il filter , clean th e area around the filter to k eep dirt and debris out of the engi ne. Oil Filter Location 5. Remove the old o il filte r and wi pe off the filter mountin g surfac e on th e engine.[...]

Mainten an ce Instruction s LUBRICATION 50 Ident Lubrication No. No. Location T ype Places I dent Lubric ation No. No. Location T ype Pl aces  'HFN&DV WHU:KHHO)RUN3LYRW *UHDVH   %ODGH'ULYH*HDUER[ 2LO    7 HH*HDUER['HFN 2LO    'HFN&DVWHU:KHHO%HDULQJ *UHDVH [...]

Mainten an ce Instruction s LUBRICATION 51 22 3 4 4 13 13 12 12 9 10 11 15 16 14 18 18 20 21 22 19 17 23 24 23 & 32 25 25 26 28 27 30 30 29 31 11 5 7 7 8 8 6 6 6 6 Chassis and Deck Lubrication Points[...]

Mainten an ce Instruction s LUBRICATION 52 Mower Deck Gearbox Lubrication NOTE: These i nstruc tions a pply to al l mower decks wit h gear-dri ven blades. Re fer to DSD52 or DSD62 Mower Deck Lubrication in t his secti on f or the DSD52 or DSD62 deck with belt-dr iven blade s. The mo wer dec k gearb oxes (tee gea rbox and blad e drive gearbo xes) a [...]

Mainten an ce Instruction s LUBRICATION 53 2. Check the oil l evel i n the b elt dri ve gear box every 100 hours (or soo ner if a v isible oil l eak has dev eloped) . With th e deck i n the n ormal operati ng posi ti on, remo ve the lev el plu g in th e side of th e gearcase. A dd SAE E.P . ( Extreme Pressu re) 90W oi l to maint ain the o il level [...]

Mainten an ce Instruction s LUBRICATION 54 Hydrosta tic T ransmission Fluid Checki ng Hyd rostatic T r ansmiss ion Fl uid Le vel Hydrostat ic transm ission fluid l evel s hould be checke d every 25 hours of machine ope ratio n. It is preferabl e to c heck the flu id level w hen fluid is cold . Check fluid l evel as follows: 1. Pa rk th e mo wer on [...]

Mainten an ce Instruction s CLEANING 55 CLEANING Engine Air Cleaner System There ar e two main c ompone nts in the engi ne air cleane r system: a turbine prec leaner and a Donal d- son Radia lseal™ ai r cleaner . Each comp onent is checked, cle aned and maintaine d on a different schedu le based o n the fil tering ac tion req uired . Each c ompon[...]

Mainten an ce Instruction s CLEANING 56 Donalds on Radial seal™ Air Cle aner A remo te moun ted Donald son Rad ialseal ™ air cleane r provide s the a ir filteri ng functio n. Th e paper filter element slid es over a n outl et tube inside the a ir cleane r caniste r with radial sealing action , elim inat- ing the poss ibility of d ust leak s due[...]

Mainten an ce Instruction s CLEANING 57 4. U se a brig ht l igh t insi de t he el eme nt to ins pect for dama ge. Check the e lement very ca r efully for pin holes or other damage that wi ll allo w dirt to le ak throug h the paper media . Replace eleme nt i f nece ssar y . 5. Check th e conditi on and res ilienc e of the rad ial seali ng surface ( [...]

Mainten an ce Instruction s CLEANING 58 NOTE: Directin g pressurized air or water from the fan side o f the rad iator outw ard is recom- mended to dislodge mater ial packed on the out- side of the cooling f ins. DO NOT use cold water on a hot r adiator . Flushin g Radia tor and Ch anging Coolant Chang e engine co olant ev ery year . Drain the cool-[...]

Mainten an ce Instruction s CLEANING 59 4. Lower th e deck to th e normal operatin g posit ion and re- engage th e deck lock lev ers. GHS Blower Normal ly , the GHS blower operates with no mainte- nance o r clea ning. However , when m owing grass that is dirty and da mp (es pecially sp ringtime mow- ing), a dep osit of dir t may accum ulate in side[...]

60 Mainten an ce Instruction s CLEANING/ CHECK ING/SER VICING IMPORT ANT : In case an oi l lea k devel ops on th e input sha ft, the coolin g fan bl owi ng du sty ai r and oil on the tran smissi on w ill quickly p ack the cooli ng fins with oily dirt. If this cond ition occurs, replac e the sea l immedi ately to avoid o verheating and da m- agin g [...]

61 Mainten an ce Instruction s CHECKING/SERVICING Security of Air Filtration Component s NOTE: The follo wing ins pection is only an ex ter- nal i nsp ecti on and shoul d be done with out “dis- turbing” the filtrati on co mponents. On a dail y basi s, visua lly insp ect the ex ternal c ondi- tion of the c omple te air cleaner syste m. The follo[...]

62 Mainten an ce Instruction s CHECKING/SERVICING Sharpe n Mower Blades Check m ower bla de(s) for straightness, s harp- ness, condition of the cutting edge, and balance every 10 hours of ope ration (or more often when mowing ab rasive type g rass or operatin g on sandy soils). Replace blad es if w orn , ben t, c rac ked , or otherwise damaged (ref[...]

63 Mainten an ce Instruction s CHECKING/SERVICING Blade Balanced on Magnetic W all-Mounted Balancer 7. Moun t the blade wi th wing tips p ointing up into the hous ing. Reinstall the blade , washer , lock washer , and nut. Tighte n the nut to 60 f t-lb (81.3 N·m). NOTE: Wh en reins talling blad es on GH S m odels , rememb er , t he bla des turn tow[...]

Mainten an ce Instruction s REPLACING/REP AIRING 64 REPLACING/RE P AIRI NG IMPORT ANT : AL W A YS us e genui ne factor y re- placem ent parts. Substitute parts CAN resu lt in produc t malfunc tion and possible i njury to the oper- ator an d/or other s. Drive Belts There are five (5) individual belts on G HS models or four (4) belts on SD models : ?[...]

Mainten an ce Instruction s REPLACING/REP AIRING 65 Engine PT O Drive Belt (3 G roove Power Band) 1. T o r emove th e engi ne PTO drive belt: a. Remove t he jacksha ft drive bel t from its idler pulle y (b y pus hing do wn on cold start lever) and let the b elt drop down out of the way . NOTE: S tep (a) is not essential to removing the PT O belt, b[...]

Mainten an ce Instruction s REPLACING/REP AIRING 66 Jacksh af t Driv e Bel t 1. T o re move t he jack shaf t dri ve be lt: a. Rela x the belt by rele asing sp ring tens ion from the jac kshaft drive idl er arm usin g the cold st art le ver . Jackshaf t Drive Belt (Engaged) Jacksha f t Drive B elt (Dise ngaged) Cold S tart Lever (R elease d) S pring[...]

Mainten an ce Instruction s REPLACING/REP AIRING 67 GHS Bl ower Driv e Belt 1. Remove th e GHS blower dr ive belt t ension by depres sing the idle r pulley on the tig htener arm. Roll the b elt off the blowe r pulley . The belt should be c lear of the b lower pulley , allowin g free movement of the blower wheel. Blower Pulley Blowe r Driv e Pulle y[...]

Mainten an ce Instruction s REPLACING/REP AIRING 68 Hydrostatic Ground Dr ive Bel t 1. T o r emove th e hydros tatic ground d rive be lt: a. Raise the spring-lo aded belt tig htener arm and idl er pulle y to r elax bel t. b. Slide b elt off p ulleys, then r elease the idler. T ransm issi on Drive Pulley Sp r i n g Idler P ulley Jacksh aft Belt Tigh[...]

Mainten an ce Instruction s REPLACING/REP AIRING 69 Engine Fan Bel t 1. T o r emove th e fan be lt: a. Loosen t he alte rnator mo unting piv ot bol t and t he altern ator brack et tensio ner bolt . b. Pivot the al ternator as s hown to relax and remove belt. Alterna tor Brac ket Crankshaft Pulle y Engin e Fan Belt T ens ioner Bolt Wa t e r P u m p [...]

Mainten an ce Instruction s REPLACING/REP AIRING 70 Fuel Filter Mode l MDD has two (2) f uel filte rs. Repl ace both the in- line fi lter and th e Kub ota filter e lemen t ever y 400 hours of operat ion. Fuel Filter Location IMPORT ANT : Replace fuel filters only in a clean area where th e fuel line and conn ections will not be cont aminated by dus[...]

Mainten an ce Instruction s REPLACING/REP AIRING 71 PT O Shear Pin The PTO drive shaft con nection to the deck ge arbox has a s hear pin to p rovide sho ck load protec tion to the mo wer deck drive. Th is sys tem pr ovides prima- ry shock protection in ca se of blade impact and will norm ally shear bef ore th e in divi dual shear bol ts on the blad[...]

72 Mainten an ce Instruction s REPLACING/REP AIRING/ ADJUSTMENTS Reinstall the b lades fo llowi ng proc edure from Sharpen Mower Blades instr ucti ons in CHECKING/ SERVICING in thi s sectio n. If blades are rep laced, always use W alker original equipment blades to ensur e safety and optimu m performan ce. The quality and p erformanc e of replaceme[...]

Mainten an ce Instruction s ADJUSTMENT S 73 1. Positi on the d ischarge chute s o that it is point- ing straight back. a. T urn t he ig nit ion sw itch ON and move the blade cl utch to t he ENGA GED positio n (engin e not runn ing) . b. Open th e catche r back do or an d monitor the spo ut pos ition (as it o scilla tes) an d move th e blad e clutch[...]

74 8VHRQOJHQXLQH :DONHU UHSODFHPHQWSDUWV 0$,17(1$1&( $1'6(59,&(5(&25'6+((7 BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBB[...]

75 LIMITED W AR RANTY FOR WA L K E R COMMERCIAL RIDER MOWER 1. WHA T THIS W ARRANTY COVERS, AND FOR HOW LONG: W alker Manufacturing company will, at it s option, repair or re place, without charge, any part covered by this warranty which is found to be defective in material and/or workmanship within one (1) y ear* after date of sale to the original[...]

WA L K E R M F G . C O . • 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970 ) 221 -5614 FORM NO. 021505 PRINTED IN USA © 2005 W ALKER MFG . CO Sound - Model MDD Sound T est Sound test co nducted was in a ccordance with 79/1 13/EEC and was performed on 28 January 98 under the conditions listed: General Con dition: Clo udy T e m p e r a t u r[...]