Briggs & Stratton MB (18 HP) - Manuals

General Information 3 HIGHLIGHTED INFORMATION Walker Manufacturing recommends that any ser-vice requiring special training or tools be performedby an authorized Walker Mower Dealer. There areseveral general practices to be aware of in the areaof safety. Most accidents associated with the oper-ation ...

General Information 4 Tractor Serial Number Location Mower Deck Serial Number Location ENGINE SERIAL NUMBER LOCATION The Briggs & Stratton engine model, type, and codenumbers are located on the left hand of the engineshroud. For the mower model covered by this man-ual, contact a Briggs & Str...

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...

Component Identification 8 Front View and Right Side View NOTE: Control Identification shown in Operating Instructions section. Forward Speed Control (FSC) Friction Adjustment Deck Discharge Shield Deck Lift Handle (Cutting Height Adjustment) Deck Caster Wheels Tilt-Up Latch Deck Support Arm Deck Su...

Component Identification 9 Rear View and Left Side View Oil Dipstick PTO Belt Protective Cover Left Hand Drive Wheel Electric Clutch Fuel Filter Cylinder Head Cooling Fins Oil Fill Muffler Tailwheel Fork and Wheel Tailpipe Left Hand Transaxle

Safety Instructions 11 Pay particular attention to any information labeledDANGER, 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 inpersonal injury. The...

Safety Instructions 12 6. Do not wear loose fitting clothing that could get caught in moving parts. Do not operate thismachine while wearing shorts; always wearadequate protective clothing, including longpants. Wearing safety glasses, safety shoes,and a helmet is advisable and required by somelocal ...

Safety Instructions 13 9. Watch for holes, rocks, and roots in the terrain and for other hidden hazards. When mowingtall grass, mow higher than desired to exposeany hidden obstacles. Then, clean the area andmow to the desired height. 10. Avoid sudden starts or stops. Before backing the machine up, l...

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...

Assembly Instructions 17 SETUP INSTRUCTIONS Walker Mowers are shipped partially assembled toour distribution network, and are typically assembledby the selling dealer. For any additional assemblybesides the following, contact your Walker dealer. Battery Service The battery is a completely sealed, no...

Assembly Instructions 18 PTO Shaft Guard Installation Position the shaft guard as shown and mount withtwo 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 theModel MB t...

Assembly Instructions 19 Deck Counterweight Spring Installation 5. Raise mower body (instead of lifting the front of deck) and clip the counterweight springs to thereceptacle on front of body. Lower the body totension the springs. (Refer to Deck Counter-weight Spring Installation photo.) 6. With the...

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 tomeasure blade height. Refer to ADJUSTINGCUTTING HEIGHT in Operating Instructions . NOTE: A block of wood cut 4 in. (1...

Assembly Instructions 21 PREOPERATING CHECKLIST Before operating the mower for the first time, and asa routine before daily operations, it is important tomake sure the mower is properly prepared and readyfor operation. The following is a list of items to bechecked. (For a mower with frequent operati...

Assembly Instructions 22 IMPORTANT: DO NOT permit dirt or other foreignmatter to enter the fuel tank. Wipe dirt from aroundthe 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-oline. DO...

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 MowerBlades in Maintenance Instru...

Operating Instructions 24 CONTROL IDENTIFICATION, LOCATION, AND FUNCTION Ignition Switch The ignition switch is located on the right front of thebody and is used to start and stop the engine. Theswitch has three positions: “O” is the OFF position,RUN is the position the key returns to after starting...

Operating Instructions 25 Engine Choke The choke control lever (black knob) is located onthe left side of the seat. To start a cold engine, movethe choke control forward to the ON position. Afterengine starts, move choke control toward the OFFposition, keeping enough choke to allow the engineto run ...

Operating Instructions 26 Parking Brake The parking brake functions by locking a detent arminto the transaxle outer control gear teeth. Movingthe lever FORWARD engages the parking brake;moving the lever BACKWARD releases the brake. IMPORTANT: Stop the tractor completely beforeengaging the parking br...

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...

Operating Instructions 28 STARTING THE ENGINE 1. Before attempting to start the engine, makesure the operator is in the seat, the ForwardSpeed Control is in NEUTRAL-PARK position,and the blade clutch and parking brake areDISENGAGED. NOTE: Release parking brake to prevent extraload on the starter if ...

Operating Instructions 30 3. Reverse direction of the mower by pulling bothlevers backward. NOTE: Smooth action on the steering leverswill produce smooth mower operation. Remem-ber to keep the engine and ground speed slowuntil learning the control response. 4. The FSC may be adjusted forward for fas...

Operating Instructions 31 STOPPING THE MACHINE 1. Slow the engine to idle; put the throttle in theIDLE position. 2. Pull the steering levers to the NEUTRAL-PARKposition and then move the FSC lever backwardto the NEUTRAL-PARK position. 3. Disengage the blade clutch. IMPORTANT: DO NOT disengage the bl...

Operating Instructions 32 TRANSAXLE LOCKOUTS IMPORTANT: DO NOT TOW this mower with thetransmission lockout engaged. Towing can produceexcessive internal pressure and damage thetransaxle. To move the mower with the engine NOT running(dead battery, maintenance, etc.), the transaxles areunlocked (relea...

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 stripeeach time the grass is mowed to avoid wear patternsin the grass. ...

Maintenance Instructions BRIGGS & STRATTON TIPS 35 IMPORTANT TIPS FOR CARE OF THEBRIGGS & 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. Sta...

Maintenance Instructions LUBRICATION 36 LUBRICATION Proper lubrication is an important maintenance pro-cedure. It reduces wear and makes the machinequieter 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 SG...

Maintenance Instructions LUBRICATION 37 3. Remove the dipstick and oil drain plug, and drainoil into a suitable container. Be sure to allowample time for complete drainage. 4. Before removing the oil filter, clean the areaaround the filter to keep dirt and debris out of theengine. 5. Remove the old ...

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...

Maintenance Instructions LUBRICATION 39 3 4 5 7 7 8 9 10 13 16 17 18 6 1 2 4 7 67 9 12 18 & 23 21 & 24 22 20 19 15 1 2 11 12 14 21 20 Chassis and Deck Lubrication Points

41 Maintenance Instructions LUBRICATION/CLEANING Transaxle Oil Filter Location 3. Reinstall drain plugs. 4. Place 6” (15 cm) block under the left hand drivewheel. 5. Remove the oil reservoir hose attached to theelbow on top of the transaxles and remove theelbows to access the oil fill openings. 6. F...

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 whichsurrounds the paper element. Clean and re-oil thefoam pre-cleaner every 25 hours; more often industy/dirty conditions. Clean...

43 Maintenance Instructions CLEANING/ CHECKING/SERVICING 1. Raise the deck lock lever handle on each side ofthe carrier frame and pull out to release carrierframe for tilting action. 2. Using the carrier frame lift handle, raise deck tothe TILT-UP position and insert the deck hookinto the tilt-up la...

44 Maintenance Instructions CHECKING/SERVICING Security of Air Cleaner System NOTE: The following inspection is only an externalinspection 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 fo...

45 Maintenance Instructions CHECKING/SERVICING 4. If the blade cutting edge is dull or nicked, itshould be sharpened. Remove blades forsharpening by grasping the end of the bladeusing a rag or a thick, padded glove, while loos-ening and removing the nut, lock washer, andflat washer that mounts the b...

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 newplug). Clean spark plug with a wire brush. If theelectrodes are burned short or pitted, replace theplug (refer to Specificat...

Maintenance Instructions REPLACING/REPAIRING 47 Engine/PTO Belt 1. To remove the engine/PTO belt: a. Remove belt guard from underneath muf-fler. Refer to Remove Belt Guard photo. b. Relax the belt by depressing the spring-loaded idler arm. c. Roll the belt off the pulley and remove thebelt. Remove B...

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 theidler. Raise Idler Pulley to Relax Belt LH Transaxle Ground Drive Belt Tension Spring RH Transaxle Drive Pu...

49 Maintenance Instructions REPLACING/REPAIRING Fuel Filter Model MB is equipped with an in-line fuel filter.Visually inspect the filter periodically, and replacethe filter yearly. Fuel Filter Location IMPORTANT: Replace the fuel filter only in a cleanarea where the fuel line and connections will no...

50 Maintenance Instructions REPLACING/REPAIRING 2. Rotate U-joint on shaft to align the shear pin holewith the hole (and shear pin fragment) in theshaft. Use a punch to drive the remaining portionof the old shear pin out. 3. Install new shear pin and secure with cotter pin. PTO Shear Pin IMPORTANT: ...

51 Maintenance Instructions ADJUSTMENTS ADJUSTMENTS Transmission Control IMPORTANT: The proper adjustment of the transax-le control stops is essential for efficient operationand life of the transaxle. These stops are properlyadjusted at the factory and should only require read-justment if the transa...

52 Maintenance Instructions ADJUSTMENTS Steering Lever Adjustment Neutral Position Adjustment - Step 3 1. With the Forward Speed Control (FSC) in neu-tral, the lever should be straight up. Adjust byloosening the jam nuts on the FSC Rod and turnthe rod to attain the straight up position. Tightenthe j...

53 Maintenance Instructions ADJUSTMENTS 3. Block the tractor up so the drive tires are off theground. 4. With the FSC in neutral, start the engine. (Op-erate first at idle and then normal operatingspeed) and check for movement of drivewheels. NOTE: If the engine will not start, check and ad-just the...

54 Maintenance Instructions ADJUSTMENTS 5. If the forward travel is straight throughout thespeed range, except at maximum speed - placethe FSC in full forward, turn the set screw in theTransmission Control Arm, of the faster side, inuntil it contacts the hydro stud. (Turning the setscrew in slows th...

55 Maintenance Instructions ADJUSTMENTS/ ELECTRICAL SYSTEM Tilt-Up Deck Adjustable Stop When the carrier frame hinge joint is properly ad-justed, the deck lock levers should move in and outof the engaged and disengaged positions freely. Allfour hitch pins used for height adjustment should sitflush o...

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WALKER MFG. CO. • 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970) 221-5614 FORM NO. 121505 PRINTED IN USA www.walkermowers.com © 2006 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...