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MMZ Jr.
Hydrostatic Zero-Turn
Riding Mower
MODEL
18HP
48" Stamped Deck
OPERATOR’S AND SERVICE MANUAL
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TABLE OF CONTENTS Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 General Safety Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 A.Danger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 B. Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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FORWARD The 18HP MMZ Jr. Hydrostatic Zero-Turn Commercial Riding Mower provides superb maneu- verability. The machine incorporates many safety features that should be studied by all opera- tors before use. The list of safety precautions should receive particular attention. This manual presents all of the operating and maintenance instructions necessary to keep your mower at peak efficiency. If operated and maintained properly, your mower will give dependable service. CAUTION: Only thoroughly tra
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6. Do not check for hydraulic leaks with any part GENERAL SAFETY of the body. OPERATIONS 7. Do not add fuel to a machine when the engine is running and/or the exhaust system is hot. A. DANGER 8. Keep machine clean and free of debris, grass, 1. Do not operate machine in confined areas leaves, oil, grease, etc. where exhaust gases can accumulate. 9. Place lap bars in neutral/start position, set 2. Do not operate machine without mower chute park brake, disengage P.T.O., turn engine off, defl
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11. When looking for oil leaks, never run your position. Always allow other vehicles to have hand over hydraulic hoses, lines or fittings. the right-of-way. Never tighten or adjust hydraulic hoses, lines 12. If you hit a solid object while mowing, turn off or fittings while the system is under pressure. the blade clutch switch, place the left and right If high-pressure oil penetrates the skin, the oil steering levers in the neutral, opened-out must be removed within a few hours by a doc- pos
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SAFETY DECALS AND LABELS WARNING SHIELD MISSING DO NOT OPERATE Part Number: 00030635 DANGER Part Number: 01003858 ROTATING BLADE Do not put hands or feet under or into mower when engine is running. Part Number: 00030633 Part Number: 01003449 Part Number: 01003859 Part Number: 01003450 Part Number: 01002166 TO REDUCE THE RISK OF INJURY, DO NOT OPERATE MOWER UNLESS DISCHARGE CHUTE COVER OR GRASS CATCHER IS IN ITS PROPER PLACE. DANGER KEEP HANDS and FEET AWAY Part Number: 01003857 Part Number: 0100
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SPECIFICATIONS Engine: 18 HP Briggs and Stratton Vanguard Type: Vertical air cooled Air Cleaner: Dual Element Lube System: Pressurized with oil filter Starter: 12-volt electric Traction Drive: Engine to two variable-speed hydraulic pump/motor BDR units to gearbox on each drive wheel Hydraulic Tank: 10 quart capacity, One quart filter Cutter Deck;Drive: 48", Belt Driven Clutch: Electric Deck Lift: Hand lever w/pin lock for height adjustment Cutting Height: 1-1/2" to 4" No. of Blades 3, belt-driv
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OPERATING INSTRUCTIONS Figure. 1 Figure. 2 Tach and Electric Blade Engine throttle Hour Meter Clutch Switch Choke Lever Ignition Switch ing and raise the cutting deck to the trans- A.General port position. Always allow other vehicles 1. When Mowing: to have the right of way. a. Keep adults, children, and pets away from l. If you hit a solid object while mowing, turn the area to be mowed. off the blade clutch switch, place the steer- b. When operating this mower, in the forward ing levers in
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c. Avoid turning when going downhill, traction B.Controls is at a minimum going downhill. 1. Engine Ignition and Start Switch: (See Fig- d. Do not operate with discharge side of the ure 1.) Located on the instrument housing mower toward streets, buildings, play- below the right side of the operator’s seat. grounds, parking lots, other machines, ani- When the key is inserted and turned clock- mals, and other people. wise, 45 degrees, the ignition circuit is closed. e. Avoid operation or use
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Steering Levers Deck Lift Handle Brake Figure. 4 Fuel Shutoff Valve Figure. 3 mechanism. To service the unit: Remove the 4. Electric Blade Clutch Switch: (See Figure hairpin clip from the locking pin and remove 1.) Located on the right side of the mower the pin from the pedal assembly. Fold the beside the ignition switch. This is an “on/off” pedal up to vertical position so the hole in the push pull switch that controls the electric pedal aligns with the hole in the lever. Rein- blade cl
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the procedures below to set the appropriate C.Initial Adjustments angle to the mowing deck. 1. Check the fluid levels and tires: a. Park the mower on a flat paved surface, engage the parking brake, shut off the Note: These checks should be made daily, engine, remove the key from the ignition before starting the engine. switch, remove connection of the spark a. Fuel: Using a good grade of unleaded, plugs and using the transport lever, lower regular gasoline (for a gasoline engine), fill
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clockwise a few turns. Adjust both front bystanders, damage to the machine, or and rear Deck links as necessary. damage to nearby facilities. Retighten nuts. d. Inspect the machine to make sure: f. Raise the mowing deck to the transport 1. All guards, shields (including mower position using the transport lever. chute deflector) are in their proper place, g. Use the transport lever to lower the mow- are secure, and are functional. ing deck to the cutting position and repeat 2. That there are n
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ning. Sit down and the engine should lap bars and the machine should stop. run. Turn off the PTO by pushing the The more the lap bars are moved toward control switch down. the rear of the machine, the faster the h. To drive in the FORWARD direction: machine will move in the reverse direc- 1. Set the engine speed to 2000 to 2500 tion. Release the lap bars and the rpm (refer to tachometer on right control machine should stop traveling in reverse panel). This must be increased to full (this is
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d. Turn the electric blade clutch switch “Off”. move backward. The farther you move the e. Push the throttle control to a position a levers backward the faster the mower will third of the way between slow and fast. go backward. f. Insert the key in the ignition and start i. To turn, pull the lever back on the side to switch and turn the switch to “On”. which you want to turn. The farther back g. Gasoline Engine: If the engine is cold, you pull the lever, the faster and more push the choke t
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Cotter Pins Cotter Pins Height of Cut Clevis Figure. 6 removing the lift linkage from the deck will a. Set the parking brake. cause it to snap back. b. Clean any debris from the blades. Keep blades sharp and free of build up at all d. Detach the mower drive belt. times. e. Remove six cotter pins (See Fig. 6) (4) c. Sharpen blades evenly at the original 30° from the deck and (2) from the front of the angle to maintain balanced cutting blades. mower. Remove the cotter pins on the left Do n
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Cover Plate Spindle Figure. 8 Hydraulic Tank 1. Adding Hydraulic Oil (use SAE20W 50) a. Place the Mower on a level surface and engage the parking brake. Figure. 7 b. Stop the engine and remove the key from the ignition switch. e. Pull the tensioner pulley away from the belt c. Clean the area around the Hydraulic Oil fill and remove the PTO belt then remove the neck. blade drive belt. d. Remove the hydraulic fill cap and check f. Reverse the process to install the belt. the level. The corre
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drain oil from both left and right axles. c. Store the battery with a full charge. A dis- Replace and retighten nuts. charged battery will freeze (refer to the table below).. Transmission Specific Gravity Freezing Temp (°F) 1.265 -71 1.250 -62 1.200 -16 1.150 5 Figure. 9 1.100 16 j. Coat new filter seal with oil before installa- tion. Install new hydraulic oil filter filled with new oil. d. Recharge battery when ever the specific k. Add proper amount of hydraulic oil to res- gravity value is
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other electrical components. This is a stan- steering lever up to the operating position dard plug-in type automotive fuse rated at 7.5 and try to start the engine. The engine amp. should not start. If it does, the left steering 7. Safety Switches: There are five safety lever switch must be repositioned or per- switches in the electrical circuit which control haps replaced. Open the left steering lever the engine. They are (1) the blade clutch to the neutral position and swing the right swi
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the wiring harness and the connections to the other side of the caster yoke. Then tighten the locknut on the end of the axle the seat switch, the blade clutch switch and assembly. the electric blade clutch. Then check out the seat switch, the blade clutch switch and Lower the mower off the jack and continue finally the electric blade clutch. mowing. The wheel with the leaking tire should be taken to the maintenance area, the D.Tires tire inflated to 20 psi and the wheel placed in a large buck
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damaged hoses. Make certain there are no Note: If you wish to move the mower by kinks or twists in any hose. pushing, you must release the dynamic brak- ing. Locate the levers at the rear of the mower. 2. Hydraulic Oil Tank and Filter: Pull both levers out and lock in position. After pushing the mower to the desired location, Note: Change the hydraulic oil and the oil return both levers to the operating position filter after the first 50 hours of operation and (See photo below). every 500
