Briggs & Stratton MB (18 HP) manuel d'utilisation

™ OWNER’S MANUAL Safety , Assembly , Ope rating, and Maintenance I nstructions and ILLUSTRA TED P AR TS MANUAL Model MB (18 HP) Please Read and Save These Instr uctions Effective Da te: 12-15-0 5 For Safety , Read All Safet y and Op eration P/N 400 0-2 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 1 Owner ’ s Manual General Informat ion ________ ______ __ 3 HIGHLIGHTED INFORMATION ________ ___ __ 3 GLOSSARY __________ ___ ___ ____ ___ ___ __ 3 IDENTIFYING NUMBER LOCATIONS ______ __ 3 ENGINE SERIAL NU MBER LOCATION ______ 4 SERVICING OF E NGINE AND DRIVETRAIN C OMPONENTS _________ ___ __ 4 Specificat ions ___________ ___[...]

T able of Conten ts 2 ADJUSTMEN TS _______ ______ __________ _ 51 Transmission Control ___ _______ _______ 51 Stee ri ng Lev er Po siti on Ad jus tmen t _____ 5 1 Steerin g Handles Adjustm ent ___ ______ _ 51 Neutral P osit ion Adjus tment _______ ____ 5 2 Full For ward Speed Ad justme nt _______ _ 53 Straigh t Trac king Adj ustme nt _________ _ 53[...]

General Information 3 HIGHLIGHTED INFORMA TION W alker M anufactur ing recom mends that an y ser- vice r equir ing specia l tr aini ng or t ool s be pe rfo rmed by an a uthorized W alker Mower Dealer . There ar e 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 tena[...]

General Information 4 T ract or Serial N umber Locati on Mower Dec k Serial Nu mber Locat ion ENGINE SERIAL NUMBE R LOCA TION The Brigg s & S tratton engine mo del, type, and code numb ers are l ocated on the left hand of the eng ine shro ud. F or t he mo wer mode l co vere d by t hi s man - ual, contact a Briggs & S tratton ser vicin g dea[...]

Specifications 5 MODEL MB ENGINE Manufac turer/Mo del Briggs & S tratton V angu ard, 2 Cyl . OHV ( Air-Coole d) Displac ement 34.7 cu. in. ( 570 cc) HP (@ 3600 RPM) 18.0 Max. RPM (No L oad) 3600 ± 100 Gover ned R PM 3600 ± 10 0 Max. T orque [ft-lb (N ⋅ m ) @ RPM] 29.5 (40 .5) @ 240 0 Idle RPM 1750 S park Plug T yp e Champion RC14YC S park P[...]

Specifications 6 MODEL MB TRANSMISSION (continued) T ran smission Flu id Factor y Servic e 20W50 Multi -Vi scosi ty Moto r Oil (Min imum SL Grade Oil ) T ransmiss ion Flui d Capacity 79 fl oz (2336 ml ) T ransmiss ion Cool ing Cooling Fan M ounted on Drive Pu lley Ground T ravel Speed Forw ard m .p. h. (km/ h) Revers e m.p.h. (km/h) 0-8 (0-1 3) Inf[...]

Specifications 7 MODEL MB DIMENSIONS (continued) Height 39 in . (99 cm ) Wheel B ase (Tractor) 38-1/2 i n. (98 c m) T read Width (Tractor) 29-3/4 i n. (76 c m) MOW ER D ECK Width of Cut 36-, 42-, 4 8-, or 5 6-in. (91, 1 07, 122 or 142 c m) Cutting He ight 1 to 4 in . (3 to 10 cm) Height Adjustm ent 7 Posi tions - 1/2 in. (1 cm) Inc rement Hi tch Pi[...]

Component Identification 8 Front Vi ew and Right Side View NOT E: Control Ide ntificat ion shown in Operating Inst ruct ions secti on. Forward S peed Control (FSC) Fricti on Adjust ment Deck Di scharg e Shield Deck Lift Handle (Cuttin g Heigh t Adju stment ) Deck Caster W heels T ilt-Up Latch Deck S upport Ar m Deck Supp ort Arm Deck Suppor t Pin a[...]

Component Identification 9 Rear View and Lef t Side View Oil Dip stick PTO B e l t Protect ive Co ver Left Hand Drive Wh eel Electric Clutch Fuel Filter Cylinde r Head Coo l in g Fi ns Oil F ill Muffler Ta i l w h e e l F o r k and Whee l T ailpi pe Left Hand T ransaxl e[...]

Component Identification 10 T op View (Body Raised) Fuel T a nk Parkin g Br ake Muf fle r Heat Sh ield Posi tive (+ ) Battery Ca ble S t eerin g Leve rs Dampening S prings Oil Dip stick RH T ransmission Control Arm LH T ransmissi on Control Arm Oil F ill LH T ai l Weight Fuel Pump LH T ransa xle Lockout R od RH T r ansaxle Expansio n R e s e r v o [...]

Safety Instructions 11 Pay particu lar atten tion to any infor mation l abele d DANGER, W ARNING , CAUTION, IMPORT ANT , and NOTE in this man ual. Wh e n y ou s ee t he S a fe ty A ler t S y m bo l ( ), read, unde rst and, and follow the instr uctions. Fail- ure to compl y with safety inst ruction s may result in perso nal in jury . The ser iousne [...]

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 ha zards. When mowin g tall gras s, mow h igher t han de sired t o exp ose any hidd en obstacles . Then, cle an the area an d mow to the desire d height. 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 5. If the en gine must b e running to perform a main- tenance adjus tment, keep ha nds, f eet, an d clothi ng away from mo ving parts. Do not we ar jewelry or loose clothing. 6. Alwa ys use t he prope r engine service manual when working on t he engine. Unauthor ized mainten ance op erations or modific ation s to the engin e [...]

Safety Instructions 15 SAFETY , CONTROL, A ND INSTRUCTION DECALS Safet y , Control , and Instr ucti on D ecals are inst al le d on the ma chine ; if any ar e missi ng, ille gibl e, or damag ed, a repl acemen t shoul d be order ed and ins t alled before puttin g the mach ine in to opera tion. Th e Decal Pa rt Numb er is list ed bel ow and in t he Pa[...]

Safety Instructions 16 SAFETY , CONTROL, A ND INSTRUCTION DECALS Safet y , Control , and Instr ucti on D ecals are inst al le d on the ma chine ; if any ar e missi ng, ille gibl e, or damag ed, a repl acemen t shoul d be order ed and ins t alled before puttin g the mach ine in to opera tion. Th e Decal Pa rt Numb er is list ed bel ow and in t he Pa[...]

Asse mbly Instr uctions 17 SETUP INSTRUCTIONS W alker Mowe rs are shippe d partially a s semble d to our di stributio n networ k, and ar e typ ically as semble d by the se lling dealer . For any add itional as semb ly beside s the f ollowing, contact y our Walker dealer . Battery S ervice The ba ttery i s a comp letel y seale d, non servicea ble ba[...]

Asse mbly Instr uctions 18 PTO Shaft Guard Insta llation Position the s haft guard as show n and mount wit h two 1/4 -20 x 1/ 2 in. bolts. PTO Shaft Guard Installation Til t-U p Roll er Wh eel I nst all ati on NOTE: A 2-1/2" diameter tilt-u p roller wh eel (P/N 9 772) is requir ed for d ecks in stalled on the Model M B tra ctor . Mount th e tw[...]

Asse mbly Instr uctions 19 Deck Counterweig ht Spring I nst allation 5. Raise mower b ody (i nstead of lifting the front of deck) a nd clip t he coun terwei ght sp rings t o the receptacle on fron t of body . Lower the body to tension t he springs . (Refer to Deck C ounter- weight Spr ing Inst allation photo.) 6. With the cou nterweight spri ngs co[...]

Asse mbly Instr uctions 20 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 heig ht. Refer to ADJUS TING CUTTING HEIGHT in Operating Instructions . NOTE: A blo ck of wood cut 4 in. (102 mm) high is a convenient gaug[...]

Asse mbly Instr uctions 21 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 pr operly prepared an d re ady for oper ation. The followi ng is a list of ite ms to be checked. (For a mower w ith freque nt operat ion, some of th ese it ems wi[...]

Asse mbly Instr uctions 22 IMPORT ANT : DO NOT permit dir t or oth er f orei gn matter to enter the fuel tank. W ipe dirt fr om aroun d the fill er cap befo re removin g. Use a clean fu el stor- age con tainer an d funnel. IMPORT ANT : DO N OT mix oil with gasoline . Always use fresh , automotiv e grade un leaded gas - oline. DO NOT use pr emiu m, [...]

Asse mbly Instr uctions 23 Deck Secured in Tilt-Up Po sition C HECK MO WER BLADE CON DITION, SHARP- NESS, AND SECUR ITY OF MOUN TING The bl ade mount ing nu t sho uld be t ightene d to 6 0 ft- lb (81.3 N ⋅ m). If blade s harpeni ng is r equired , refer to CH ECKING/SERVICING for Sharpen Mower Blades in Maintenance Instructions . A DJUST MOWER CUT[...]

Operatin g Instr uctions 24 CONTROL IDENTIFICA TION, LOCA TI ON, AND FUNCTION Ignition Switch The ign ition swit ch is loc ated on the right front of th e body a nd is us ed to start an d s to p th e e ngi ne. T h e switch has three positions: “ O” is the OFF posit ion, RUN is t he positi on the key retur ns to after starting, and “S” is th[...]

Operatin g Instr uctions 25 Engine Choke The ch oke c ontrol le ver ( black k nob) is locat ed on the left si de of th e seat. T o start a cold engine, m ove the cho ke co ntrol for ward to the ON position . After engine starts, move c hoke co ntrol toward th e OFF positi on, keepin g enoug h choke to a llow th e engine to run smoot hly as it warm [...]

Operatin g Instr uctions 26 Parking Brake The p arki ng br ake fu nctio ns by lockin g a det ent ar m into the t ransaxle outer c ontrol gear tee th. Moving the lev er FORW A RD engages the par kin g br ake; moving the le ver B ACKW ARD releases the brak e. IMPORT ANT : S top the trac tor comp letely before engagin g the parkin g brake. The parking[...]

Operatin g Instr uctions 27 THROTTLE BLADE CLUTCH (PT O) PA R K I N G BRAKE LEFT WHEEL STEE RING LE VER Forw ard P os iti on (No Contro l Change) RIGHT WHEEL STEERING LEVER FORW ARD SPEED CONTROL LEVER (FSC) Full F orward Ground S peed Positi on Inte rm edi ate Ground S peed Posit ion Neutral-Park Positio n Idle Posit ion ON Positi on OFF Position [...]

Operatin g Instr uctions 28 ST ARTING THE ENGINE 1. Before attempting to s tart 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 [...]

Operatin g Instr uctions 29 1. Move the FSC out of NEUTRAL-P ARK pos itio n to the d esired forward speed . DO NOT ho ld for- ward on s tee ring leve rs. It is n ot ne ces sary to hold th e FSC l ever i n positi on sinc e a fri ction lock ma int ains t he se lected l ever p ositio n (and forwar d travel s peed). NOTE: This is exa ctly the same proc[...]

Operatin g Instr uctions 30 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 ed f orwar d for fast er ground s pee d a nd b[...]

Operatin g Instr uctions 31 STOPPING THE MACHINE 1. Slow the engin e to i dle; put th e thro ttle in th e IDLE po sition. 2. Pull the steering lev ers to the NEUTRAL-P ARK position and the n move t he FSC lever b ackward to the NE UTRAL-P ARK p osition. 3. Disenga ge the bla de clutc h. IMPORT ANT : DO NOT disengage the bl ade clutch with high engi[...]

Operatin g Instr uctions 32 TRANSAXLE LOCKOUTS IMPORT ANT : DO NOT T OW this mowe r with the transm ission lock out engage d. T owing ca n prod uce exces sive inter nal pres sure and d amage th e tran saxle. T o mo ve the m ower with the engine NOT runnin g (dead b attery , ma intenan ce, etc. ), the trans axles a re unlo cked (relea sed). 1. Raise[...]

Operatin g Instr uctions 33 • Make s ure the m ower is leveled prope rly for a smooth cut. Refer to Deck Leveling in Assem bly Instructions . • Use an al ternating stripe mowing p attern for best ap pearance and v ary the direction of the s tripe each tim e the gras s is mowe d to avoid wear patterns in the gr ass. • Avoid damage to the grass[...]

Mainten an ce Instruction s 34 MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERV ALS - MODEL MB Service It em Daily 25 Hours 50 Hours 100 Hours 250 Hours Y early Ref. Page Check Engine C rankcase Oil Level x3 6 Check/Clean Engine Air Cooling System* x4 1 Clean Grass Buildup Under Deck x4 2 Service Mower Blades x4 4 Check Security of Air Clean[...]

Mainten an ce Instruction s BRIGGS & STRA TT ON TIP S 35 IMPORT ANT TIPS FOR CARE OF THE BRIGGS & STRA TTON ENGINE Fuel System • Fuel must be cl ean - free from water , dirt, and or- ganic m ateri al. • Clean the fu el filter on a regular basi s and when contaminati on is s uspected or found in the f uel. Star t in g • S tart engine w[...]

Mainten an ce Instruction s LUBRICA TION 36 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 specia l break-in oil is required. T he engine is ser- viced wi th 10W-30, S ervice Class S G oil from th e fact ory .[...]

Mainten an ce Instruction s LUBRICA TION 37 3. Remove the di pstick and oil d rain plu g, and drai n oil i nto a suitable containe r . Be sure to allo w ample ti me for c omplete dr ainage. 4. Before removi ng the o il filte r , clea n the are a around the filter to keep di rt and deb ris out of th e engine. 5. Remove the old o il filte r and wi pe[...]

Mainten an ce Instruction s LUBRICATION 38 Ident Lubrication No. No. Location T ype Places Ident Lubrication No. No. Location T ype Places  'HFN&DVWHU:KHHO)RUN3LYRW *UHDVH   'HFN&DVWHU:KHHO%HDULQJ *UHDVH   7 HH*HDUER['HFN 2LO    %ODGH'ULYH*HDUER[ 2LO   [...]

Mainten an ce Instruction s LUBRICATION 39 3 4 5 7 7 8 9 10 13 16 17 18 6 1 2 4 7 6 7 9 12 18 & 23 21 & 24 22 20 19 15 1 2 11 12 14 21 20 Chassis and Deck Lubrication Points[...]

Mainten an ce Instruction s LUBRICA TION 40 Mower Deck Gearbox Lubrication The mo wer dec k gearb oxes (tee gea rbox and blad e drive gearboxe s) are c onnected as a unitize d assem bly , and oil flows freely betwe en them. The gearbo xes ar e permanentl y lubric ated (oil fil led) and sealed requiri ng no schedu led lubri cation. Howe ver , the g [...]

41 Mainten an ce Instruction s LUBRICA TION/CLEANING T ran saxle O il Filter L ocation 3. Rein stall drain plugs. 4. Place 6” (15 cm) block under the left hand driv e wheel. 5. Remove th e oil rese rvoir ho se attached to th e elbow on top of the tr ansaxl es and remove the elbows to acc ess the oil fill openin gs. 6. Fill the t ransax les with 2[...]

Mainten an ce Instruction s CLEANING 42 Clean Cooling Fins and Fan Air Cleaner System The eng ine is equipped with a paper air clea ner el e- ment with an oiled foam pr e-cleaner whi ch surroun ds the paper element. Clean and re-oil th e foam pre -clean er ever y 25 hours ; more often i n dusty/d irty co nditio ns. Clean the paper elemen t every 10[...]

43 Mainten an ce Instruction s CLEANING/ CHECKING/SERVICING 1. Raise the deck l ock lever handle on each s ide o f the carr ier frame and pull out to rel ease c arrier frame fo r tiltin g action. 2. Using the carrier frame lift handl e, raise dec k to the TIL T-UP positi on and insert the deck hook into the tilt-up l atch on th e tracto r body . De[...]

44 Mainten an ce Instruction s CHECKING/SERVICING Securit y of Air Clea ner Sys tem NOTE: The f ollowing insp ection is only an ex ter nal inspection an d shou ld be don e witho ut “disturb- ing” the filtr ation co mponen ts. On a dail y basi s, visua lly insp ect the ex ternal c ondi- tion of th e air c leaner cov er . Check f or dam age. Ma k[...]

45 Mainten an ce Instruction s CHECKING/SERVICING 4. If the bl ade c utting edg e is dull or nicked, it should be sharp ened. Re move blad es for sharp ening by grasping the e nd of the blad e using a rag or a thick, padded g love, while l oos- ening a nd rem oving th e nut, loc k washer , and flat was her that m ounts the blad e. 5. Grin d cutt in[...]

46 Mainten an ce Instruction s CHECK ING/S ERVICING/ REPLACING/REP AIRING Sp ark Plug s Every 100 hour s, remo ve the spark p lugs , insp ect, clean, and res et the g ap (o r replac e with a new plug). Clean spark plug wi th a wire br ush. If th e electrod es are bu rned short o r pitted, repla ce the plu g (ref er to Specifications for the proper [...]

Mainten an ce Instruction s REPLACING/REP AIRING 47 Engine /PT O Belt 1. T o rem ove th e engine/PTO belt: a. Remove bel t guard from under neath muf- fler . Refer to Re move Belt Guard p hoto. b. Rela x the b elt by dep ress ing the s pring- loaded i dler arm. c. Roll the bel t of f the pulley an d remove the bel t. Remove Belt Guard Remove Bo lts[...]

Mainten an ce Instruction s REPLACING/REP AIRING 48 Groun d Drive Be lt 1. T o r emove th e gro und driv e belt : a. Raise th e sprin g-loade d idle r to rel ax belt. b. Slide b elt off pulleys, then r elease the idler. Raise Id ler Pul ley to Relax Belt LH T ransaxl e Ground Drive Belt Te n s i o n Sp r i n g RH T ransaxle Drive P ulley Idler P ul[...]

49 Mainten an ce Instruction s REPLACING/REP AIRING Fuel Filter Model MB is eq uipped wit h an in-l ine fuel filter . Visually inspec t the fi lter pe riod ically , a nd re place the filte r yearly . Fuel Filter Location IMPORT ANT : Replace the f uel filt er on ly in a clea n area wher e th e fu el l ine an d co nne ctio ns wi ll no t be contamina[...]

50 Mainten an ce Instruction s REPLACING/REP AIRING 2. Rotate U-jo int on shaft to a lign the shea r pin h ole with the h ole (and shear p in fragme nt) in th e shaft. Use a pun ch to dr ive the re maining p ortio n of the old shea r pin out . 3. Install n ew shear pi n and secur e with co tter pin. PT O Shear Pin IMPORT ANT : Use only W alker P/N [...]

51 Mainten an ce Instruction s ADJUSTMENTS ADJUSTMEN TS T ransmission C ontrol IMPORT ANT : The proper adjustme nt of the tran sax- le con tro l sto p s is esse ntial for ef ficient oper ati on and lif e of the transax le. These s top s are pr operly adju sted a t the f actory and shou ld onl y requ ire rea d- justme nt if the tr ansaxl e or rela t[...]

52 Mainten an ce Instruction s ADJUSTMENTS Steering Lever Ad justment Neutral Positi on Adjus tment - Step 3 1. With t he F orward S peed Contr ol (FSC) in neu- tral, the le ver shou ld be straig ht up. Adju st by loosen ing the jam nuts on the FS C Rod and tur n the rod to attain the strai ght up po sition. Tighten the jam nuts. FSC Position Steer[...]

53 Mainten an ce Instruction s ADJUSTMENTS 3. Bl oc k the tr act or up so t he dr iv e ti res a re o f f t he grou nd. 4. With th e FSC in neu tr al, start the eng ine . (O p- erate fi rst at idle and then nor mal opera ting speed) and chec k for mo vemen t of drive wheels. NOTE: If the engine will n ot start, c heck an d ad- just the ne utral sa f[...]

54 Mainten an ce Instruction s ADJUSTMENTS 5. If th e forwar d trav el is straigh t through out th e speed r ange, exc ept at max imum spee d - plac e the FSC i n full for ward, tu rn the set s crew in the T ransmission C ontrol A rm, of the faster side , in until i t contacts the hy dro stud . (T urning the set screw in slows the wheel .) T urn th[...]

55 Mainten an ce Instruction s ADJUSTMENTS/ ELECTRICAL SYSTEM Tilt-Up Deck Adjustable Stop When t he car rier fram e hin ge join t is pr ope rly ad- justed, the d eck lo ck levers should move in and ou t of the e ngaged and di senga ged positi ons freely . All four hitch pins used for h eight adju stment should si t flush o n the washe rs abov e th[...]

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ITEM PA RT DESCRIP TION NO. NO. NO. REQ’D ITEM PART DESC RIPTIO N NO. NO. NO. REQ’D 8VHRQOJHQXLQH :DONHU  UHSODFHPHQWSDUWV (I IHFWLYH'DWH 64 +<'5267 $ 7,&*5281''5,9($66(0%/,(6 *URXQG'ULYH$VVHPEOLHV   5HVHUYRLU&DS [...]

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ITEM PA RT DESCRIP TION NO. NO. NO. REQ’D ITEM PART DESC RIPTIO N NO. NO. NO. REQ’D 8VHRQOJHQXLQH :DONHU  UHSODFHPHQWSDUWV (I IHFWLYH'DWH 70 635($'7 $,/:+((/$;/(.,7 .LW  6SUHDG$[OH.LW  ,QFOXGHV,WHPV IDVWHQHUV?[...]

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8VHRQOJHQXLQH :DONHU  UHSODFHPHQWSDUWV (IIHFWLYH'DWH 72 :,5,1* 6&+(0$ 7,& HOUR METER B A M S1 S2 G 15 AMP CIRCUIT BREAKER BA TTER Y W ALKER MODEL MB Beginning S/N 2005-76681 S1 = ST ART CIRCUIT S2 = ST ART/ACCESSOR Y CIRCUIT M = MAGNETO GROUND CIRCUIT B = BA TTER Y CIRCUIT A = ACCE[...]

73 LIMITED W AR RANTY FOR W ALKER MODEL MB 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 o ne (1) year af ter date of sale to the original ret [...]

W ALKER MFG . CO. • 592 5 E. HARMONY ROAD, FORT COLLINS, C O 80528 • (970) 22 1-5614 FORM NO. 121505 PRINTED IN USA www .walkermo wers.com © 2006 W ALKER MFG . CO Sound - Model MB Sound T est Sound test conducted was in accordance with 2000/14/EC and was performed on 31 May 05 under the conditions listed: General Co ndition: Clear T e mperatur[...]