Walker MDD (20.9 HP) Bedienungsanleitung

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: 12-01-0 3 For Safety , Read All Safet y and Op eration P/N 700 0-6 Instruc tions Pr ior to O peratin g Mac hine Price $5.00 ™[...]

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 ENGINE Manufac turer/Mo del Kubota D722, 3 Cyl., Die sel (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 qts (2[...]

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 al ve 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 SD/GHS 42 or 48 in. ( 107 or 12 2 cm) 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 3VX335 ( P/N 6231) Ground Dr ive W alker P /N 7248 Blower (GHS Model ) Gates 3VX28 0 (P/N 7234-1) 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 mbi[...]

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 Donalds on Air Clean er Air Clea ner Cover Radi ato r Guar d Radiator GHS Blo wer RH Hydrostatic T ransmi ssion Neutral Safety Switc h Battery Negat ive (-) Battery Cabl e Air Restr iction Indicator (Not Vi sib le) Preclean er Tube Jacks haft PT O Gearbox Dipstick Tu r b i n e Preclea ner RH T ransmission Lockou t Lever 4[...]

Component Identification 10 Exhaus t Manif old Oil F ill Cap Alternat or W ater T emperature Gauge Se nder Thermos tat Housing and Th ermostat Radiator Screen (Remov able) Radiator Fan and Sh ield Engine Stop Lever Link age (Fue l S hut -Of f V alve) Throttle Contr ol Link age Le ver Injecti on Pump Inje ctors Air Intake Hose Fuel T a nk Cap Fuel R[...]

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 Instru ment Pa nel: (7823- 2) 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[...]

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 Battery Ch arging 1. Charge the battery at 15 am p s for 10 minutes . DO NOT exceed 20 amp s ma ximu 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 lectrol yte level t o the bot[...]

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 lns 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 co unt[...]

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 Instr uctions 25 CONTROL IDENTIFICA TION, LOCA TI ON, AND FUNCTION Operating Controls Engine Throttle The thrott le control lever (red kno b) is locat ed on the left side of the s eat and is use d to cont rol e ngine speed. Movi ng the lever fo r wa rd towa rd the FA S T positio n inc reases en gine s peed; moving it b ack- ward toward t[...]

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 . Circuit Br eakers T wo manual reset cir cuit break ers ar e locate d on the instrume nt panel. Each has a butto n that pops o[...]

Operatin g Instr uctions 32 3. Move th e throttl e 1/4 to 1/2 open (towar d FA S T ) and turn t he igni tion swit ch to th e ST ART position to s tart the engine. Rele ase the key to the RUN posit ion as so on as the engine s tarts. IMPORT ANT : If the engine fa ils to sta rt af ter approximately 10 seconds of cranking, t he engine should be checke[...]

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 Instr uctions 43 Grass Catcher Screen Removal for Cleaning Dumping the Catcher For dum pi ng, th e c at ch er e ithe r tailgate du mps int o a dispo sal are a or dumps in to the opt ional dump bag. T he du mp bag i s a reusabl e nylon fabric bag d esi gn ed to c onveniently move gras s clippin gs from the catcher t o a remote disp osal a[...]

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 58 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 an ce Instruction s LUBRICATION 49 Oil Drain Location (view from lef t s ide of tractor) 4. Before removi ng the o il filte r , clea n the are a 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 engin e. 6. Apply a thin coatin[...]

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 1 Deck Caster Wheel Fork Pivot Grease 2 2 Blade Drive Gearbox Oil* 2 3 T ee G earbox, Deck Oil* 1 4 Deck Caster Wheel Bearing Grease 2 5 PTO Shaft Guard Hinge Oil 1 6 Universal Joint Shaft Assembly Grease** 1[...]

Mainten an ce Instruction s LUBRICATION 51 13 22 3 4 4 15 15 16 16 14 14 10 11 12 13 18 19 17 21 21 23 24 25 22 20 27 28 29 28 & 38 26 30 30 31 31 32 34 33 36 37 37 35 33 34 39 40 11 5 6 8 8 9 9 7 7 7 7 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. Ch eck the oil le vel in the belt dri ve gearbox ev- ery 100 hour s (or s ooner i f a v isible oil leak has develo ped). With t he deck i n the n ormal o per- atin g position, remo ve the lev el plug in the side of the gearcase. A dd SA E E.P . ( Extrem e Pres- sure) 9 0W oil t o main ta in the o il le [...]

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 LUBRICATION/CLEANING 55 3. Rein stall the lower dr ain plug, ma king sur e the rubber O -ring on the plug i s in place an d in good condition. 4. Refill th e transmi ssion throu gh the ai r bleed plug hol e unti l it is a s full as possi ble. IMPORT ANT : Avoid fluid contam ination when filling the reservoir . Use clean [...]

Mainten an ce Instruction s CLEANING 56 T urbine Pr ec le ane r The t urbine prec leaner is mounted o n a remote a ir intake tube c onnected to the Donald son air c leaner . A spi nning fa n dr iven b y the i ntake air flow s eparates dust fr om the air , gi ving the initi al stage of air clea n- ing. Dust parti cles are ex haust ed through a singl[...]

Mainten an ce Instruction s CLEANING 57 1. Rele ase the top and bo ttom cover latc hes and remove the air cle aner co ver . W ash th e cove r and V acu ator™ val ve. Check that these co m- pone nts are in good condit ion. The V acuat or™ valv e is s ubj ect to we ar an d d eter ior ati on and shoul d be rep lac ed yearly or when damaged . The l[...]

Mainten an ce Instruction s CLEANING 58 10. Check the air i nt ake hose for cut s, n icks, etc. , and t he hose c lamps for tight ness. 1 1. Res et t he ai r r estr icti on in dica tor (pre ss bu tton on bottom ). Engine Cooling System Radiator Screen a nd Cooling Fins T o prevent the engine from overheating and possi- ble engi ne damage , clean gr[...]

Mainten an ce Instruction s CLEANING 59 Deck Secu red i n TIL T -UP Position 3. Clean gra ss build up undernea th the deck us ing a pres sure was her (a nd scraper if requ ired). NOTE: While some degree of ma terial buildup in the mower deck housing can be tolerated, a point is finally reached where cutting qualit y dete riorates and cloggi ng begi[...]

60 Mainten an ce Instruction s CLEANING/ CHECK ING/SER VICING 3. Rein stall the GHS blo wer driv e bel t by rev ersin g the rem oval pr ocedure . Collapse Blower Be lt Tightener to Remove G HS Blower D rive Belt GHS Exhaust Scr een Refer to Cl eaning th e GHS Exha ust Scr een in Op- erating Instructions . Hydrosta tic T ransmission Cooling Fins Kee[...]

61 Mainten an ce Instruction s CHECKING/SERVICING Check the coolant le vel in the cool ant recove ry tank and maint ain the coolan t level betwee n the FULL and LOW marks on the re covery tank. When the engine is cold, the coolant level shoul d be at or sligh tly abov e the LOW mark on the rec overy tank. If the coolant level is low , remove the r [...]

62 Mainten an ce Instruction s CHECKING/SERVICING Charging th e Batte ry Check the bat tery char ge by measuring the specific gravi ty of el ectroly te; if specif ic gr avity is les s tha n 1.225, t he bat tery wi ll need to b e cha rged as follows : 1. Charge the battery at 15 am p s for 10 minutes . DO NOT exceed 20 a mps maxi mum r ecom- mended [...]

63 Mainten an ce Instruction s CHECKING/SERVICING NOTE: Blades can be sharpened wi th an elec- tric blade sharpener , conv entional electric grind- er , or a hand file. Mower Blade P rofile For Sha rpening 6. Check blade balance by pos itioning the blad e horizont ally on a bla de balancer or use a n ail or shaft throug h the center hole. If eith e[...]

Mainten an ce Instruction s CHECK ING/S ERVICI NG 64 Fuel Lines and Clamps Every yea r , in spect th e fuel supply line f rom t he tank to eng ine for d eterior ation or d amage. Also , inspec t the fuel line cla mps for tight ness. Good preventi ve maint enance ca lls for compl ete replacemen t of fuel lines and clam ps every tw o (2) yea rs. NOTE[...]

65 Mainten an ce Instruction s CHECKING/SERVICING/ REPLACING/REP AIRING Fuel V alve Open (Engine ST ART and RUN Position) If the fue l valve so lenoi d is not oper ating prop erly , the probl em may be isol ated by first checking the operati on of the s oleno id as fol lows: 1. Disco nnect the fuel va lve so lenoid wire plug from the wire harne ss.[...]

Mainten an ce Instruction s REPLACING/REP AIRING 66 Jacks haft Drive Belt Engine PTO Be lt Engine Fan Bel t GHS Bl ower Belt (GHS Mo del Only ) Hydrostatic G round Drive Belt Belt Locations[...]

Mainten an ce Instruction s REPLACING/REP AIRING 67 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 a n ce Instru c tions REPLACING/REP AIRING 68 J a ck s h a f t D r i v e B e l t 1. T o re move t he jack shaf t d rive belt: a. Rela x the belt by rele asing sp ring tens ion from the jac kshaft drive idl er arm using the cold s t art le ve r . Jackshaft Drive Belt (Engaged) J a cks h a f t Dr i ve B elt ( D is e n g a g e d ) Cold S tart [...]

Mainten an ce Instruction s REPLACING/REP AIRING 69 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 70 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 71 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 72 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 73 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[...]

Mainten an ce Instruction s REPLACING/REP AIRING 74 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 replacement blades off[...]

Mainten an ce Instruction s REPLACING/REP AIRING 75 GHS Blower Assembly (and/or Blower Wheel) GHS Bl ower Asse mbly Re mova l 1. Remove the mower deck. Refer to De ck Instal - latio n in Asse mbly Inst ruct ion s and reverse th e proc edu re to r emov e th e de ck. Remove Skid Bar for GHS Blower Removal 2. Remove th e blower faceplate by removing s[...]

76 Mainten an ce Instruction s REPLACING/REP AIRING Blower Whee l Installati on 1. T o i nstall the blow er wheel, r everse th e remov- al procedures. The fron t bearin g is mou nted on the bl ower whee l sha ft, secured by a loc king collar . Drive th e lock ing co llar cloc kwise with a punch, a nd tig hten the se t screw . 2. Press bl ower wh ee[...]

77 Mainten an ce Instruction s REPLACING/REP AIRING/ ADJUSTMENTS 4. Rein stall the sol enoid . A t this poi nt, move th e soleno id linkage by hand and c heck for any binding or dragg ing of th e solenoi d plun ger and linka ge. If the soleno id does n ot mov e freely , adju st the soleno id mounti ng posi tion by ben d- ing the m ount and /or loos[...]

78 Mainten an ce Instruction s ADJUSTMENTS Blade Cl utch (PTO) Clutch D isengage ment/Br ake Ac tion The de clutched or disengaged position of th e blad e clutc h idl er pull ey is adju stable an d is set t o give b elt re leas e without exc essive slack an d to apply the bl ade b rake. T he blade bra ke is activate d by link age to the clutch id l[...]

Mainten an ce Instruction s ADJUSTMENTS 79 Clutch Linkage Adjustment - Disengaged Clutch Linkage Adjustment - Engaged T ran smission Co ntrol IMPORT ANT : The proper adjustmen t of the trans - missi on con tr ol s tops is ess ent ial for efficient oper- ation and life of the tr ansmission . These s tops are proper ly adjus ted at the fac tory and s[...]

Mainten an ce Instruction s ADJUSTMENT S 80 S teering Leve r End Play Ad justm ent - Step 2 1. Position the FSC lever to the most FOR W ARD position. 2. Loosen th e adjustmen t nut on each steering le- ver a ctuator u ntil end play dev elops betwee n the lev er ac tu ator a nd the adj ustme nt n ut ( s lid- ing on tr ansm ission c ontrol r od). 3. [...]

Mainten an ce Instruction s ADJUSTMENT S 81 Stra ight Ground T ravel Adjustment Forward Speed Cont rol Frict io n Lock The F SC fri ction lock is ad juste d to hold the select- ed forw ard speed when the steeri ng levers are moved an d y et th e fr icti on i s no t too hea vy to m a ke moving the control difficult (to o much fr iction ). The pr oce[...]

Mainten an ce Instruction s ADJUSTMENTS 82 IMPORT ANT : The solenoi d linkage should be check ed and adju sted any tim e the solen oid is re- moved and replaced (eithe r rein stalling an e xistin g soleno id or in stalling a n ew rep lacement) . Check a nd adj ust the s olenoid l inkage a s follows : 1. Manu ally pul l the fu el valv e open a nd ch[...]

Mainten an ce Instruction s ELECTRICAL SYSTEM 83 ELECTRIC AL SYST EM For tro ubleshoo ting, refe r to Wirin g Dia gram. IMPORT ANT : Disconne ct both battery c ables be - fore unpl uggin g any wir ing co nnectors or mak ing re- pairs on th e electr ical sy stem. IMPORT ANT : Disconne ct the batt ery cables before unpluggi ng and removin g the ins t[...]

84 Mainten an ce Instruction s ELECTRICAL SYSTEM IGNITION SWITCH CIRCUITS OFF GLOW PLUG ST ART RUN OFF OFF OFF OFF ST ART GLOW PLUG RUN RUN ST ART GLOW PLUG RUN RUN (LOW) RUN (HIGH) GLOW PLUG ST ART ALL OPEN 30 + 19 + AC 30 + 17 + 50 + AC 30 + AC 30 + 87 30 + 87A 30 + 87A 30 + 87A 30 + 87A 30 + 87 30 + 87 30 + 87A 30 + 87A 30 + 87A 30 + 87 OPEN OPE[...]

85 0$,17(1$1&($1'6(59,&(5(&25'6+((7 BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB BBBBB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB[...]

86 Operator ’ s Notes[...]

87 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. 010104 PRINTED IN USA © 2004 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[...]