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- Owner's Manual
Walker Rider Lawnmowers MB Owner's Manual
Summary of MB
Page 1
™ owner’s manual safety, assembly, operating, and maintenance instructions and illustrated parts manual model mb (18 hp) please read and save these instructions effective date: 09-01-06 for safety, read all safety and operation p/n 4000-3 instructions prior to operating machine.
Page 2: Foreword
Foreword thank you. . .For purchasing a walker mower. Every effort has been made to provide you with the most reliable mower on the market, and we are sure you will be among our many satisfied custom- ers. If for any reason this product does not perform to your expectations, please contact us at (97...
Page 3: Table Of Contents
Table of contents 1 owner’s manual general information ________________ 3 highlighted information _____________ 3 glossary ____________________________ 3 identifying number locations________ 3 engine serial number location ______ 4 servicing of engine and drivetrain components ______________ 4 speci...
Page 4: Table Of Contents
Table of contents 2 replacing/repairing ________________ 46 drive belts __________________________ 46 engine/pto belt ____________________ 47 ground drive belt ___________________ 48 fuel filter ___________________________ 49 blade overload shear bolts ____________ 49 pto shear pin _________________...
Page 5: General Information
General information 3 highlighted information walker manufacturing recommends that any ser- vice requiring special training or tools be performed by an authorized walker mower dealer. There are several general practices to be aware of in the area of safety. Most accidents associated with the oper- a...
Page 6: General Information
General information 4 tractor serial number location mower deck serial number location engine serial number location the briggs & stratton engine model, type, and code numbers are located on the left hand of the engine shroud. For the mower model covered by this man- ual, contact a briggs & stratton...
Page 7: Specifications
Specifications 5 model mb engine manufacturer/model briggs & stratton vanguard, 2 cyl. Ohv (air-cooled) displacement 34.7 cu. In. (570 cc) hp (@ 3600 rpm) 18.0 max. Rpm (no load) 3600 ± 100 governed rpm 3600 ± 100 max. Torque [ft-lb (n ⋅ m) @ rpm] 29.5 (40.5) @ 2400 idle rpm 1750 spark plug type cha...
Page 8: Specifications
Specifications 6 model mb transmission (continued) neutral transmission release by manual dump valve final drive direct drive axle from transaxle transmission fluid factory service 20w50 multi-viscosity motor oil (minimum sl grade oil) transmission fluid capacity 79 fl oz (2336 ml) transmission cool...
Page 9: Specifications
Specifications 7 model mb dimensions (continued) 48 in. (122 cm) sd model (with deflector) 53-3/4 in. (137 cm) 56 in. (142 cm) sd model (with deflector) 61-3/4 in. (157 cm) height 39 in. (99 cm) wheel base (tractor) 38-1/2 in. (98 cm) tread width (tractor) 29-3/4 in. (76 cm) mower deck width of cut ...
Page 10: Component Identification
Component identification 8 front view and right side view note: control identification shown in operating instructions section. Deck discharge shield deck lift handle (cutting height adjustment) deck caster wheels tilt-up latch deck support arm deck support pin and height adjustment hitch pins tilt-...
Page 11: Component Identification
Component identification 9 rear view and left side view oil dipstick left hand drive wheel cylinder head cooling fins oil fill muffler tailwheel fork and wheel fuel filter fuel pickup line tailpipe fuel tank and cap.
Page 12: Component Identification
Component identification 10 top view (body raised) fuel tank parking brake positive (+) battery cable oil dipstick rh transmission control arm lh transmission control arm oil fill lh tail weight fuel pump rh tail weight fuel filter negative (-) battery cable air cleaner cover air cleaner cover latch...
Page 13: Safety Instructions
Safety instructions 11 pay particular attention to any information labeled danger, warning, caution, important, and note in this manual. When you see the safety alert symbol ( ), read, understand, and follow the instructions. Fail- ure to comply with safety instructions may result in personal injury...
Page 14: Safety Instructions
Safety instructions 12 6. Do not wear loose fitting clothing that could get caught in moving parts. Do not operate this machine while wearing shorts; always wear adequate protective clothing, including long pants. Wearing safety glasses, safety shoes, and a helmet is advisable and required by some l...
Page 15: Safety Instructions
Safety instructions 13 9. Watch for holes, rocks, and roots in the terrain and for other hidden hazards. When mowing tall grass, mow higher than desired to expose any hidden obstacles. Then, clean the area and mow to the desired height. 10. Avoid sudden starts or stops. Before backing the machine up...
Page 16: Safety Instructions
Safety instructions 14 5. If the engine must be running to perform a main- tenance adjustment, keep hands, feet, and clothing away from moving parts. Do not wear jewelry or loose clothing. 6. Always use the proper engine service manual when working on the engine. Unauthorized maintenance operations ...
Page 17: Safety Instructions
Safety instructions 15 safety, control, and instruction decals safety, control, and instruction decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The decal part number is listed bel...
Page 18: Safety Instructions
Safety instructions 16 safety, control, and instruction decals safety, control, and instruction decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The decal part number is listed bel...
Page 19: Assembly Instructions
Assembly instructions 17 setup instructions walker mowers are shipped partially assembled to our distribution network, and are typically assembled by the selling dealer. For any additional assembly besides the following, contact your walker dealer. Battery service the battery is a completely sealed,...
Page 20: Assembly Instructions
Assembly instructions 18 pto shaft guard installation position the shaft guard as shown and mount with two 1/4-20 x 1/2 in. Bolts. Pto shaft guard installation tilt-up roller wheel installation note: a 2-1/2" diameter tilt-up roller wheel (p/n 9772) is required for decks installed on the model mb tr...
Page 21: Assembly Instructions
Assembly instructions 19 deck counterweight spring installation 5. Raise mower body (instead of lifting the front of deck) and clip the counterweight springs to the receptacle on front of body. Lower the body to tension the springs. (refer to deck counter- weight spring installation photo.) 6. With ...
Page 22: Assembly Instructions
Assembly instructions 20 deck leveling 1. Position mower on a smooth, level surface. Set the cutting height to the highest position - 4 in. (102 mm) - for easy access under the deck to measure blade height. Refer to adjusting cutting height in operating instructions . Note: a block of wood cut 4 in....
Page 23: Assembly Instructions
Assembly instructions 21 preoperating checklist before operating the mower for the first time, and as a routine before daily operations, it is important to make sure the mower is properly prepared and ready for operation. The following is a list of items to be checked. (for a mower with frequent ope...
Page 24: Assembly Instructions
Assembly instructions 22 important: do not permit dirt or other foreign matter to enter the fuel tank. Wipe dirt from around the filler cap before removing. Use a clean fuel stor- age container and funnel. Important: do not mix oil with gasoline. Always use fresh, automotive grade unleaded gas- olin...
Page 25: Assembly Instructions
Assembly instructions 23 deck secured in tilt-up position check mower blade condition, sharp- ness, and security of mounting the blade mounting nut should be tightened to 60 ft- lb (81.3 n ⋅ m). If blade sharpening is required, refer to checking/servicing for sharpen mower blades in maintenance inst...
Page 26: Operating Instructions
Operating instructions 24 control identification, location, and function ignition switch the ignition switch is located on the right front of the body and is used to start and stop the engine. The switch has three positions: “o” is the off position, run is the position the key returns to after start...
Page 27: Operating Instructions
Operating instructions 25 engine choke the choke control lever (black knob) is located on the left side of the seat. To start a cold engine, move the choke control forward to the on position. After engine starts, move choke control toward the off position, keeping enough choke to allow the engine to...
Page 28: Operating Instructions
Operating instructions 26 parking brake the parking brake functions by locking a detent arm into the transaxle outer control gear teeth. Moving the lever forward engages the parking brake; moving the lever backward releases the brake. Important: stop the tractor completely before engaging the parkin...
Page 29: Operating Instructions
Operating instructions 27 throttle blade clutch (pto) parking brake left wheel steering lever forward position (no control change) right wheel steering lever forward speed control lever (fsc) full forward ground speed position intermediate ground speed position neutral-park position idle position on...
Page 30: Operating Instructions
Operating instructions 28 starting the engine 1. Before attempting to start the engine, make sure the operator is in the seat, the forward speed control is in neutral-park position, and the blade clutch and parking brake are disengaged. Note: release parking brake to prevent extra load on the starte...
Page 31: Operating Instructions
Operating instructions 29 1. Move the fsc out of neutral-park position to the desired forward speed. Do not hold for- ward on steering levers. It is not necessary to hold the fsc lever in position since a friction lock maintains the selected lever position (and forward travel speed). Note: this is e...
Page 32: Operating Instructions
Operating instructions 30 3. Reverse direction of the mower by pulling both levers backward. Note: smooth action on the steering levers will produce smooth mower operation. Remem- ber to keep the engine and ground speed slow until learning the control response. 4. The fsc may be adjusted forward for...
Page 33: Operating Instructions
Operating instructions 31 stopping the machine 1. Slow the engine to idle; put the throttle in the idle position. 2. Pull the steering levers to the neutral-park position and then move the fsc lever backward to the neutral-park position. 3. Disengage the blade clutch. Important: do not disengage the...
Page 34: Operating Instructions
Operating instructions 32 transaxle lockouts important: do not tow this mower with the transmission lockout engaged. Towing can produce excessive internal pressure and damage the transaxle. To move the mower with the engine not running (dead battery, maintenance, etc.), the transaxles are unlocked (...
Page 35: Operating Instructions
Operating instructions 33 • make sure the mower is leveled properly for a smooth cut. Refer to deck leveling in assembly instructions . • use an alternating stripe mowing pattern for best appearance and vary the direction of the stripe each time the grass is mowed to avoid wear patterns in the grass...
Page 36: Maintenance Instructions
Maintenance instructions 34 maintenance schedule chart - recommended service intervals - model mb service item daily 25 hours 50 hours 100 hours 250 hours yearly ref. Page check engine crankcase oil level x 36 check/clean engine air cooling system* x 41 clean grass buildup under deck x 42 service mo...
Page 37: Maintenance Instructions
Maintenance instructions briggs & stratton tips 35 important tips for care of the briggs & stratton engine fuel system • fuel must be clean - free from water, dirt, and or- ganic material. • clean the fuel filter on a regular basis and when contamination is suspected or found in the fuel. Starting •...
Page 38: Maintenance Instructions
Maintenance instructions lubrication 36 lubrication proper lubrication is an important maintenance pro- cedure. It reduces wear and makes the machine quieter and easier to operate. Engine oil engine break-in oil no special break-in oil is required. The engine is ser- viced with 10w-30, service class...
Page 39: Maintenance Instructions
Maintenance instructions lubrication 37 3. Remove the dipstick and oil drain plug, and drain oil into a suitable container. Be sure to allow ample time for complete drainage. 4. Before removing the oil filter, clean the area around the filter to keep dirt and debris out of the engine. 5. Remove the ...
Page 40: Maintenance Instructions
Maintenance instructions lubrication 38 ident lubrication no. No. Location type places ident lubrication no. No. Location type places 'hfn&dvwhu:khho)run3lyrw *uhdvh 'hfn&dvwhu:khho%hdulqj *uhdvh 7hh*hduer['hfn 2lo %odgh'ulyh*hduer[ 2lo 8qlyhuvdo-rlqw6kdiw$vvhpeo\ *uhdvh 'hfn6xssruw$up6rfnhw *uhdvh ...
Page 41: Maintenance Instructions
Maintenance instructions lubrication 39 3 4 5 7 7 8 11 9 13 16 17 18 6 1 2 4 7 6 7 11 12 22 & 23 20 & 24 21 20 19 15 1 2 10 12 14 22 chassis and deck lubrication points.
Page 42: Maintenance Instructions
Maintenance instructions lubrication 40 mower deck gearbox lubrication the mower deck gearboxes (tee gearbox and blade drive gearboxes) are connected as a unitized assembly, and oil flows freely between them. The gearboxes are permanently lubricated (oil filled) and sealed requiring no scheduled lub...
Page 43: Maintenance Instructions
41 maintenance instructions lubrication/cleaning transaxle oil filter location 3. Reinstall drain plugs. 4. Place 6” (15 cm) block under the left hand drive wheel. 5. Fill the transaxles with 20w-50 (api service class sl or higher) oil through the reservoir. Fill up to the opening. 6. Remove the blo...
Page 44: Maintenance Instructions
Maintenance instructions cleaning 42 clean cooling fins and fan air cleaner system the engine is equipped with a paper air cleaner ele- ment with an oiled foam pre-cleaner which surrounds the paper element. Clean and re-oil the foam pre-cleaner every 25 hours; more often in dusty/dirty conditions. I...
Page 45: Maintenance Instructions
43 maintenance instructions cleaning/ checking/servicing 1. Raise the deck lock lever handle on each side of the carrier frame and pull out to release carrier frame for tilting action. 2. Using the carrier frame lift handle, raise deck to the tilt-up position and insert the deck hook into the tilt-u...
Page 46: Maintenance Instructions
44 maintenance instructions checking/servicing security of air cleaner system note: the following inspection is only an external inspection and should be done without “disturb- ing” the filtration components. On a daily basis, visually inspect the external condi- tion of the air cleaner cover. Check...
Page 47: Maintenance Instructions
45 maintenance instructions checking/servicing 3. Check the blades for straightness by marking the blade tip position inside the deck housing, and then rotating the opposite end of the blade to the same position and comparing. If the dif- ference in blade tip track is more than 1/8 in. (3 mm), the b...
Page 48: Maintenance Instructions
46 maintenance instructions checking/servicing/ replacing/repairing spark plugs every 100 hours, remove the spark plugs, inspect, clean, and reset the gap (or replace with a new plug). Clean spark plug with a wire brush. If the electrodes are burned short or pitted, replace the plug (refer to specif...
Page 49: Maintenance Instructions
Maintenance instructions replacing/repairing 47 engine/pto belt 1. To remove the engine/pto belt: a. Loosen and remove idler tension bolt and jam nut. B. Relax belt by depressing idler arm. C. Roll the belt off the pulley and remove the belt. Idler arm engine/pto belts idler tension bolt jam nut pto...
Page 50: Maintenance Instructions
Maintenance instructions replacing/repairing 48 ground drive belt 1. To remove the ground drive belt: a. Raise the spring-loaded idler to relax belt. B. Slide belt off pulleys, then release the idler. Raise idler pulley to relax belt lh transaxle ground drive belt tension spring rh transaxle drive p...
Page 51: Maintenance Instructions
49 maintenance instructions replacing/repairing fuel filter model mb is equipped with an in-line fuel filter. Visually inspect the filter periodically, and replace the filter yearly. Fuel filter location important: replace the fuel filter only in a clean area where the fuel line and connections will...
Page 52: Maintenance Instructions
50 maintenance instructions replacing/repairing 2. Rotate u-joint on shaft to align the shear pin hole with the hole (and shear pin fragment) in the shaft. Use a punch to drive the remaining portion of the old shear pin out. 3. Install new shear pin and secure with cotter pin. Pto shear pin importan...
Page 53: Maintenance Instructions
51 maintenance instructions adjustments adjustments transmission control important: the proper adjustment of the transax- le control stops is essential for efficient operation and life of the transaxle. These stops are properly adjusted at the factory and should only require read- justment if the tr...
Page 54: Maintenance Instructions
52 maintenance instructions adjustments neutral position adjustment - step 3 1. With the forward speed control (fsc) in neu- tral, the lever should be straight up. Adjust by loosening the jam nuts on the fsc rod and turn the rod to attain the straight up position. Tighten the jam nuts. Fsc position ...
Page 55: Maintenance Instructions
53 maintenance instructions adjustments 6. One at a time adjust the left and right control rods to find the center of the neutral window. Shorten the rods until the drive tire turns forward then lengthen it until the drive tire turns in reverse (approximately 1 turn). Position the rods 1/2 way betwe...
Page 56: Maintenance Instructions
54 maintenance instructions adjustments neutral switch adjustment - step 6 1. Place the fsc in neutral position. Loosen the bottom lock nut and adjust switch body up with top nut until the switch contacts open. Turn the nut an additional 1 turn. Tighten lower nut. Fsc switch location forward speed c...
Page 57: Maintenance Instructions
55 maintenance instructions adjustments/ electrical system pto belt tension pto belt tension can be adjusted by lengthening or shortening the position of the adjustment bolt on the idler adjuster (above idler pulley). Optimum adjust- ment will result in a 1/2 (1.27 cm) deflection of the belt. Pto be...
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Page 75
73 limited warranty for walker model mb rider mower 1. What this warranty covers, and for how long: walker manufacturing company will, at its option, repair or replace, without charge, any part covered by this warranty which is found to be defective in material and/or workmanship within one (1) year...
Page 76: 0.6G
Walker mfg. Co. • 5925 e. Harmony road, fort collins, co 80528 • (970) 221-5614 form no. 090106 printed in usa www.Walkermowers.Com © 2007 walker mfg. Co sound - model mb sound test sound test conducted was in accordance with 2000/14/ec and was performed on 31 may 05 under the conditions listed: gen...