Jonsered JNA16H42B Owner's Manual
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Jonsered JNA16H42B Owner's Manual

Jonsered JNA16H42B Owner's Manual

15.5 hp 42 inch lawn tractor
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MODEL NO. LT16A (JNA16H42B)
15.5 HP 42 Inch
Lawn Tractor
532 17 99-38 3.8.02 JH
PRINTED IN U.S.A.

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Summary of Contents for Jonsered JNA16H42B

  • Page 1 MODEL NO. LT16A (JNA16H42B) 15.5 HP 42 Inch Lawn Tractor 532 17 99-38 3.8.02 JH PRINTED IN U.S.A.

  • Page 2: Safety Rules

    SAFETY RULES SAFE OPERATION PRACTICES FOR RIDE-ON MOWERS IMPORTANT: THIS CUTTING MACHINE IS CAPABLE OF AMPUTATING HANDS AND FEET AND THROWING OBJECTS. FAILURE TO OBSERVE THE FOLLOWING SAFETY INSTRUCTIONS COULD RESULT IN SERIOUS INJURY OR DEATH. I. GENERAL OPERATION • Avoid starting or stopping on a slope.
  • Page 3 SAFETY RULES Safe Operation Practices for Ride-On Mowers Look for this symbol to point out im- portant safety precautions. It means • Be sure the area is clear of other people before mowing. CAUTION!!! BECOME ALERT!!! YOUR Stop machine if anyone enters the area. SAFETY IS INVOLVED.

  • Page 4: Table Of Contents

    PRODUCT SPECIFICATIONS CONGRATULATIONS on your purchase of a new tractor. It has been designed, engineered and manufactured to give GASOLINE CAPACITY 3.5 GALLONS you the best possible dependability and performance. AND TYPE: UNLEADED REGULAR Should you experience any problem you cannot easily OIL TYPE (API-SF-SJ): SAE 30 (above 32°F) remedy, please contact your nearest authorized service...
  • Page 5 UNASSEMBLED PARTS Steering Wheel Seat Steering (1) Washer Wheel 17/32 x 1-3/16 x 12 Gauge Adapter (1) Bolt Steering Boot Steering Wheel Insert (1) Oil Drain Tube (1) Locknut For Future Use 1/4-28 Steering Extension Shaft (2) Keys Slope Sheet (1) Locknut (1) Large Flat 1/2-20...

  • Page 6: Assembly

    ASSEMBLY Your new tractor has been assembled at the factory with exception of those parts left unassembled for shipping purposes. To ensure safe and proper operation of your tractor all parts and hardware you assemble must be tightened securely. Use the correct tools as necessary to insure proper tightness.
  • Page 7 ASSEMBLY INSTALL SEAT (See Fig. 3) TO ROLL TRACTOR OFF SKID (See Operation section, for location and function of controls) Adjust seat before tightening adjustment knob. • Remove adjustment knob and flat washer securing seat • Press lift lever plunger and raise attachment lift lever to to cardboard packing and set aside for assembly of seat its highest position.
  • Page 8 ASSEMBLY CHECK TIRE PRESSURE CHECKLIST The tires on your tractor were overinflated at the factory for BEFORE YOU OPERATE AND ENJOY YOUR NEW TRAC- shipping purposes. Correct tire pressure is important for TOR, WE WISH TO ASSURE THAT YOU RECEIVE THE best cutting performance.

  • Page 9: Operation

    OPERATION These symbols may appear on your tractor or in literature supplied with the product. Learn and understand their meaning. BATTERY CAUTION OR REVERSE FORWARD FAST SLOW WARNING LIGHTS ON OVER TEMP ENGINE ON ENGINE OFF OIL PRESSURE LIGHT PARKING BRAKE UNLOCKED MOWER LIFT FUEL...
  • Page 10 OPERATION KNOW YOUR TRACTOR READ THIS OWNER'S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR TRACTOR Compare the illustrations with your tractor to familiarize yourself with the locations of various controls and adjustments. Save this manual for future reference. IGNITION LIGHT ATTACHMENT SWITCH SWITCH...
  • Page 11 OPERATION The operation of any tractor can result in foreign objects thrown into the eyes, which can result in severe eye damage. Always wear safety glasses or eye shields while operating your tractor or performing any adjustments or repairs. We recommend a wide vision safety mask over spectacles or standard safety glasses.
  • Page 12 OPERATION TO ADJUST GAUGE WHEELS (See Fig. 6) TO OPERATE ON HILLS Gauge wheels are properly adjusted when they are slightly CAUTION: Do not drive up or down hills off the ground when mower is at the desired cutting height in with slopes greater than 15°...
  • Page 13 OPERATION BEFORE STARTING THE ENGINE TO START ENGINE (See Fig. 4) When starting the engine for the first time or if the engine has CHECK ENGINE OIL LEVEL run out of fuel, it will take extra cranking time to move fuel •...
  • Page 14 OPERATION MOWING TIPS PURGE TRANSMISSION • Mower should be properly leveled for best mowing CAUTION: Never engage or disengage performance. See “TO LEVEL MOWER HOUSING” in freewheel lever while the engine is run- the Service and Adjustments section of this manual. ning.

  • Page 15: Customer Responsibilities

    CUSTOMER RESPONSIBILITIES MAINTENANCE SCHEDULE FILL IN DATES AS YOU COMPLETE REGULAR SERVICE SERVICE DATES Check Brake Operation Check Tire Pressure Check Operator Presence and Interlock Systems Check for Loose Fasteners Sharpen/Replace Mower Blades Lubrication Chart Check Battery Level Clean Battery and Terminals Check Transaxle Cooling Check V-Belts Check Engine Oil Level...
  • Page 16 CUSTOMER RESPONSIBILITIES TRACTOR MANDREL TRAILING ASSEMBLY EDGE UP CENTER Always observe safety rules when performing any mainte- HOLE nance. BRAKE OPERATION LOCK WASHER If tractor requires more than six (6) feet stopping distance at high speed in highest gear, then brake must be adjusted. BLADE BOLT STAR (See “TO ADJUST BRAKE”...
  • Page 17 CUSTOMER RESPONSIBILITIES • Remove terminal guard. TO CHANGE ENGINE OIL (See Figs. 12 & 13) • Disconnect BLACK battery cable first then RED battery Determine temperature range expected before oil change. cable and remove battery from tractor. All oil must meet API service classification SF-SJ. •...
  • Page 18 CUSTOMER RESPONSIBILITIES IN-LINE FUEL FILTER (See Fig. 14) ENGINE COOLING FINS The fuel filter should be replaced once each season. If fuel Remove any dust, dirt or oil from engine cooling fins to filter becomes clogged, obstructing fuel flow to carburetor, prevent engine damage from overheating.

  • Page 19: Service And Adjustments

    SERVICE AND ADJUSTMENTS WARNING: TO AVOID SERIOUS INJURY, BEFORE PERFORMING ANY SERVICE OR ADJUSTMENTS: • Depress clutch/brake pedal fully and set parking brake. • Place motion control lever in neutral (N) position. • Place attachment clutch in “DISENGAGED” position. • Turn ignition key to “STOP”...
  • Page 20 SERVICE AND ADJUSTMENTS SIDE-TO-SIDE ADJUSTMENT (See Figs. 16 and 17) • Raise mower to its highest position. MANDREL • At the midpoint of both sides of mower, measure height from bottom edge of mower to ground. Distance “A” on both sides of mower should be the same or within 1/4" of each other.
  • Page 21 SERVICE AND ADJUSTMENTS TO ADJUST BRAKE (See Fig. 21) • Slide belt into the center span keeper. • Pull belt toward front of tractor and roll belt around Your tractor is equipped with an adjustable brake system electric clutch and onto engine pulley. which is mounted on the side of the transaxle.
  • Page 22 SERVICE AND ADJUSTMENTS TO START ENGINE WITH A WEAK BATTERY MOTION CONTROL NEUTRAL (See Fig. 25) LEVER LOCK GATE WARNING: Lead-acid batteries generate explosive gases. Keep sparks, flame and smoking materials away from bat- teries. Always wear eye protection when around batteries.
  • Page 23 SERVICE AND ADJUSTMENTS TO REMOVE HOOD AND GRILL ASSEMBLY • Reinstall terminal guard. • First connect RED battery cable to positive (+) battery (See Fig. 27) terminal with hex bolt and keps nut as shown. Tighten • Raise hood. securely. •...

  • Page 24: Storage

    STORAGE ENGINE Immediately prepare your tractor for storage at the end of the season or if the tractor will not be used for 30 days or more. FUEL SYSTEM IMPORTANT: IT IS IMPORTANT TO PREVENT GUM CAUTION: Never store the tractor with DEPOSITS FROM FORMING IN ESSENTIAL FUEL SYSTEM gasoline in the tank inside a building PARTS SUCH AS CARBURETOR, FUEL FILTER, FUEL...

  • Page 25: Troubleshooting

    TROUBLESHOOTING POINTS PROBLEM CAUSE CORRECTION Will not start Out of fuel. Fill fuel tank. Engine not “CHOKED” properly. See “TO START ENGINE” in Operation section. Engine flooded. Wait several minutes before attempting to start. Bad spark plug. Replace spark plug. Dirty air filter.
  • Page 26 TROUBLESHOOTING POINTS PROBLEM CAUSE CORRECTION Engine continues to run Faulty operator-safety presence control system. Check wiring, switches and connections. If not when operator leaves corrected, contact an authorized service center/ seat with attachment department. clutch engaged Poor cut - uneven Worn, bent or loose blade.
  • Page 27 TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 SCHEMATIC BLACK BATTERY SOLENOID FUSE STARTER AMMETER (OPTIONAL) WHITE BLACK WHITE WHITE BLACK ELECTRIC CLUTCH CLUTCH / BRAKE (PEDAL UP) IGNITION BLACK SWITCH BLACK SEAT SWITCH (NOT OCCUPIED) PTO (DISENGAGED)

  • Page 28: Repair Parts - Tractor

    REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 ELECTRICAL...
  • Page 29 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 ELECTRICAL PART DESCRIPTION 532 16 34-65 Battery 12 Volt 28 AMP 874 76 04-12 Bolt Hex Hd 1/4-20unc X 3/4 532 12 48-86 Battery Tray 532 14 52-11 Bolt Btr Frt...
  • Page 30 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 CHASSIS AND ENCLOSURES...
  • Page 31 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 CHASSIS AND ENCLOSURES PART DESCRIPTION 532 17 46-19 Chassis stamping 532 17 65-54 Drawbar, 12 Ga. 817 06 06-12 Screw 3/8-16x3/4 532 15 52-72 Bumper Hood/Dash 532 17 22-94 Dash Slkscr...
  • Page 32 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 DRIVE 19 24...
  • Page 33 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 DRIVE KEY PART KEY PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION - - - - - - - - Transaxle Hydro Gr. 314-0510 810 04 07-00 Washer Lock Hvy HLCL Spr 7/16 (Order parts from transaxle mfg.)
  • Page 34 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 STEERING ASSEMBLY...
  • Page 35 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 STEERING ASSEMBLY PART DESCRIPTION 532 17 20-92 Wheel Steering 532 17 23-93 Axle Stamped 532 16 98-40 Spindle Asm Cast LH 532 16 98-39 Spindle Asm Cast RH 532 12 49-31 Bearing Race Thrust Harden 532 12 17-48 Washer 25/32 X 1-5/8 X 16 Ga.
  • Page 36 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 SEAT ASSEMBLY PART PART DESCRIPTION DESCRIPTION 532 14 01-18 Seat 532 12 12-48 Bushing Snap Blk Nyl 50 Id 532 14 05-51 Bracket Pivot Seat 8 720...
  • Page 37 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 DECALS PART PART DESCRIPTION DESCRIPTION 532 15 70-32 Decal Oper. Step Thru E/F 532 15 71-40 Decal Fender Danger 532 14 50-05 Decal Battery 532 17 91-28 Decal Deck "B" 42...
  • Page 38 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 ENGINE OPTIONAL EQUIPMENT Spark Arrester PART PART DESCRIPTION DESCRIPTION 532 17 05-51 Control Th/ch Flag Dom. 532 12 34-87 Clamp Hose Black 817 72 04-08 Screw Hex Thd Cut 1/4-20x5/8 T...
  • Page 39 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 MOWER LIFT 17 18 PART PART DESCRIPTION DESCRIPTION 532 15 94-60 Wire Asm Inner W/plunger 819 13 10-16 Washer 13/32 X 5/8 X 16 Ga 532 15 94-71 Shaft Asm Lift RH w/Inf 532 12 48-74 Spring 2-1/8"...
  • Page 40 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 MOWER DECK 132 91...
  • Page 41 REPAIR PARTS TRACTOR - MODEL NO. LT16A (JNA16H42B), PRODUCT NO. 954 13 00-70 MOWER DECK PART PART DESCRIPTION DESCRIPTION 532 15 50-46 Arm, Idler 532 16 58-92 Mower Deck Assembly, 42” 532 16 57-23 Spacer, Retainer 872 14 05-06 Bolt...
  • Page 42 SERVICE NOTES...
  • Page 43 SUGGESTED GUIDE FOR SIGHTING SLOPES FOR SAFE OPERATION ONLY RIDE UP AND DOWN HILL, NOT ACROSS HILL 15 DEGREES MAX. WARNING: To avoid serious injury, operate your tractor up and down the face of slopes, never across the face. Do not mow slopes greater than 15 degrees.

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