MMZ Jr.
Hydrostatic Zero-Turn
Riding Mower
OPERATOR’S AND SERVICE MANUAL
MODEL
18HP
48" Stamped Deck
Page 1: ...MMZ Jr Hydrostatic Zero Turn Riding Mower OPERATOR S AND SERVICE MANUAL MODEL 18HP 48 Stamped Deck...
Page 2: ...nance and Service 14 A Mower Deck 14 B Hydraulic Oil 16 C Electrical System 17 D Tires 19 E Brakes 19 F Hydraulic System 20 G Storage 21 Maintenance Schedule 22 Performance Adjustments 24 A High Speed...
Page 3: ...r will give dependable service CAUTION Only thoroughly trained persons should operate and maintain this mower This machine can cause serious injury to anyone who mis uses it and does not understand it...
Page 4: ...alled 6 Do not check for hydraulic leaks with any part of the body 7 Do not add fuel to a machine when the engine is running and or the exhaust system is hot 8 Keep machine clean and free of debris gr...
Page 5: ...holes sprinkler heads and other hidden hazards 7 Avoid driving too close to trees creeks ditches sand traps and other obstacles 8 Before backing up check behind you and watch where you re going 9 Alwa...
Page 6: ...DANGER Part Number 00030633 Part Number 01003859 Part Number 01003858 Part Number 01003449 KEEP HANDS and FEET AWAY DANGER TO R E DU CE TH E R IS K O F I NJU RY D O N OT OP E R ATE M OW E R U N L E S...
Page 7: ...3 belt driven power take off from engine Controls Engine ignition and start switch throttle choke left and right steering levers electric blade clutch switch parking brake mower deck lift Parking Bra...
Page 8: ...raise the cutting deck to the trans port position Always allow other vehicles to have the right of way l If you hit a solid object while mowing turn off the blade clutch switch place the steer ing le...
Page 9: ...wed B Controls 1 Engine Ignition and Start Switch See Fig ure 1 Located on the instrument housing below the right side of the operator s seat When the key is inserted and turned clock wise 45 degrees...
Page 10: ...move the hand lever outward and slowly reduce foot pedal effort to lower the mechanism To service the unit Remove the hairpin clip from the locking pin and remove the pin from the pedal assembly Fold...
Page 11: ...hese are detected d Replace the deck cover 4 Adjust the Mowing Deck The cutting height is set anywhere in the range of 1 1 2 to 4 You may need to adjust the mowing deck to achieve the proper angle for...
Page 12: ...to nearby facilities d Inspect the machine to make sure 1 All guards shields including mower chute deflector are in their proper place are secure and are functional 2 That there are no spilled or lea...
Page 13: ...lowly move both lap bars toward the rear of the machine until the machine begins to move rearward Release the lap bars and the machine should stop The more the lap bars are moved toward the rear of th...
Page 14: ...forward and the mower will slowly move forward The farther you move the levers forward the faster the mower will go forward h To back up move both steering levers slightly backward and the mower will...
Page 15: ...he cutting surface of the blade with a rag to avoid injury a Set the parking brake b Clean any debris from the blades Keep blades sharp and free of build up at all times c Sharpen blades evenly at the...
Page 16: ...Stop the engine and remove the key from the ignition switch c Clean the area around the Hydraulic Oil fill neck d Remove the hydraulic fill cap and check the level The correct level is up to the low...
Page 17: ...ap Replace control panel b Clean the battery before storing A dirty battery will lose its charge over time c Store the battery with a full charge A dis charged battery will freeze refer to the table b...
Page 18: ...ut in the neutral posi tion the parking brake engaged and the blade clutch switch off swing the left steering lever up to the operating position and try to start the engine The engine should not start...
Page 19: ...p free Slip the axle assembly through one side of the caster yoke through a spacer sleeve a spare wheel the other spacer sleeve and finally through the other side of the caster yoke Then tighten the l...
Page 20: ...pan under the drain plug on the bottom of the hydraulic oil tank Remove the drain plug drain the tank then replace the plug Place the drain pan under the filter and remove the filter by unscrewing in...
Page 21: ...mal position and place the steering lever on the side you adjusted up to the operating position If you feel a slight push forward or a slight pull backward from the neu tral position you must adjust t...
Page 22: ...and the hydro drive belt g Check the blades Make sure they are sharp and that the blade securing cap screws are tight h Check the cutting height 2 When ready to start the engine a Check the five safe...
Page 23: ...and Down Pivots Seat Hinge Steering Lever Linkage Rod End Bearings Lever Return Assembly Rod End Bearings Pump Control Lever Pivots Brake Lever Pivot Clevis Pin Brake Lever Control Rod Pivot Brake Co...
Page 24: ...con trol panel see Fig 1 on page 8 of the manual This display defaults to Tachometer mode when engine is running 4 Move the throttle lever to the high speed posi tion and note the RPM reading on the...
Page 25: ...back should stay in contact with the seat back 2 Lap bars should not contact operator s legs c In the full reverse position 1 Lap bars should not contact the opera tor s legs or torso 2 Set the seat...
Page 26: ...o raise the deck and loosening the nut to lower the deck The right front blade tip height is fixed so you must adjust the left front tip to match it 7 Measure the blade to ground height at the right r...
Page 27: ...27 WIRING DIAGRAM...
Page 28: ...tning e damage caused by unauthorized attachments or modification or f any other abuse or misuse of the equipment 3 EXCLUSIVE WARRANTY THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARR...
