Yard Machines 370 Series Operator's Manual
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Yard Machines 370 Series Operator's Manual

Yard Machines 370 Series Operator's Manual

Yard machines rotary mower operators manual
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Operators Manual

Model Series
370 thru 389
Rotary Mowers
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
Warning:
This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department, P.O. Box 368022 Cleveland, Ohio 44136-9722.
MTD PRODUCTS INC. P.O. BOX 368022 CLEVELAND, OHIO 44136-9722
PRINTED IN U.S.A.
FORM NO. 770-0420A
10/97

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Summary of Contents for Yard Machines 370 Series

  • Page 1: Operators Manual

    Operators Manual Model Series 370 thru 389 Rotary Mowers IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest- covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any).

  • Page 2: Section 1: Important Safe Operation Practices

    SECTION 1: IMPORTANT SAFE OPERATION PRACTICES WARNING: THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS WHICH, IF NOT FOLLOWED, COULD ENDANGER THE PERSONAL SAFETY AND/OR PROPERTY OF YOURSELF AND OTHERS. READ AND FOLLOW ALL INSTRUCTIONS IN THIS MANUAL BEFORE ATTEMPTING TO OPERATE YOUR LAWN MOWER. FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.

  • Page 3: Slope Operation

    • Do not engage the self-propelled mechanism on units so equipped while starting engine. • The blade control handle is a safety device. Never attempt to bypass its operation. Doing so makes the safety device inoperative and may result in personal injury through contact with the rotating blade.
  • Page 4 • To reduce fire hazard, keep mower free of grass, leaves, or other debris build-up. Clean up oil or fuel spillage. Allow mower to cool at least 5 minutes before storing. • Before cleaning, repairing, or inspecting, make certain the blade and all moving parts have stopped.

  • Page 5: Slope Gauge

    SLOPE GAUGE...

  • Page 6: Section 1: Finding Your Model Number

    SECTION 1: FINDING YOUR MODEL NUMBER This Operator’s Manual is an important part of your new walk behind. It will help you assemble, prepare and maintain your walk behind. Please read and understand what it says. Before you start to prepare your walk behind for its first use, please locate the model plate and copy the information from it in this Operator’s Manual.

  • Page 7: Section 3: Unpacking Instructions

    SECTION 3: UNPACKING INSTRUCTIONS REMOVE UNIT FROM CARTON • See Figure 2. • Remove staples, break glue on top flaps, or cut tape at carton end and peel along top flap to open carton. • Remove loose parts if included with unit (i.e., owner’s manual, etc.). •...

  • Page 8: Section 4: Set-Up Instructions

    SECTION 4: SET-UP INSTRUCTIONS This guide covers models 370 - 379 single speed self propelled mowers and 380 - 389 six speed self propelled mowers. However, there are some areas where only one model is covered. Use only the information that is appropriate for your model.
  • Page 9 Step 3. Tighten wing nuts. HERE Step 5. Pinch lower handle against mounting bracket with pliers. Step 6. Move hairpin clip from outer to inner hole on handle mounting bracket. PINCH HERE Step 8. Loosen the wing nut holding the rope guide to the upper handle. Step 9.

  • Page 10: Section 5: Controls

    SECTION 5: CONTROLS Recoil Starter All Models BLADE CONTROL HANDLE The blade control handle is located on the upper handle of the mower. See Figure 4. The blade control handle must be depressed in order to start and operate the unit. Release the blade control handle to stop the engine and blade.

  • Page 11: Section 6: Operation

    NOTE: Only move the shift lever when the engine is running. Changing the shift lever setting with the engine off can cause damage to the mower. CUTTING HEIGHT ADJUSTMENT LEVER The cutting height adjustment lever is located above the left rear wheel. To adjust the cutting height, pull the lever out and away from the mower and then move it forward or back for a new cutting height.
  • Page 12 EACH TIME BEFORE YOU START YOUR MOWER • Attach spark plug wire to spark plug. Make certain the metal cap on the end of the spark plug wire is fastened securely over the metal tip on the spark plug. • Check for proper drive clutch operation using the NEUTRAL ADJUSTMENT TEST. NEUTRAL ADJUSTMENT TEST To perform the NEUTRAL ADJUSTMENT TEST answer the following questions.
  • Page 13 BAGGING GRASS CLIPPINGS This mower can bag grass clippings. Follow steps 1 and 2 to ready the mower for bagging. Step 1. Remove mulching plug, if installed. LIFT EMPTYING A FULL BAG OF GRASS Once the grass bag is full it will need to be emptied, follow steps 3 and 4 to empty the grass bag. Step 3.

  • Page 14: Section 7: Adjustments

    SIDE DISCHARGING GRASS CLIPPINGS (Optional) Side Discharge Top and Left View. This side up SECTION 7: ADJUSTMENTS WARNING: Do not at any time make any adjustment to lawn mower without first stopping engine and disconnecting spark plug wire. HANDLE HEIGHT ADJUSTMENT Lower Handle Your mower is shipped with the handle in the higher height position.

  • Page 15: Throttle Control Adjustment

    To resolve the above problems, rotate the adjustment wheel with your fingers. Clockwise to tighten the cable and counter-clockwise to loosen the cable. See Figure 8. Models 370 - 379 Note: For some people the drive clutch handle may not be in a comfortable position. You can adjust the handle out by tightening the adjustment wheel.

  • Page 16: Section 8: Lubrication

    SECTION 8: LUBRICATION WARNING: Always stop engine and disconnect spark plug wire before cleaning, lubricating or doing any kind of work on the lawn mower. Wheels Blade Control: Lubricate the pivot points on the blade control handle and the brake cable at least once a season with light oil.
  • Page 17 DECK The underside of the mower deck should be cleaned after each use to prevent a buildup of grass clippings, leaves, dirt or other matter. If this debris is allowed to accumulate, it will invite rust and corrosion, and may prevent proper mulching, discharge or bagging.
  • Page 18 SHIFT LEVER CABLE ADJUSTMENT (Models 380 - 389 Only) Periodic adjustment of the six speed shift cable may be required due to normal wear on the cable. Adjustment is needed if all six speeds do not work. The adjustable cable bracket is located on the left side of the mower, beside the engine. Follow steps 1 through 7 to adjust the shift lever.
  • Page 19 DRIVE BELT REMOVAL AND REPLACEMENT (Model 370 Series) If you need to replace a worn or broken drive belt, follow steps 1 through 22. Step 1. Disconnect the spark plug and ground it. Step 2. Drain the fuel tank. Step 3.
  • Page 20 Step 14. Replace large baffle. Step 15. Replace small baffle and three hex head screws holding it in place. Step 16. Replace blade adapter and blade. See the Blade Removal, Sharpening and Replacement Section for proper assembly. Small Baffle Blade Hex Head Screw Step 17.
  • Page 21 DRIVE BELT REMOVAL AND REPLACEMENT (Model 380 Series) If you need to replace a worn or broken drive belt, follow steps 1 through 30. Step 1. Disconnect the spark plug and ground it. Step 2. Drain the fuel tank. Step 3. Remove rear hub caps and wheels.
  • Page 22 Step 13. Squeeze the belt together and push belt forward. Press the control arm inward towards the deck and remove the six speed cable from the slot. Six-Speed Belt Cable Slot Control Step 14. Place the new belt over the transmission pulley.
  • Page 23 Step 21. Pinch belt together so that it is not in the pulley groove, and the lower pulley can be pushed towards the engine. Lower Pulley Half Step 24. Replace large baffle. Step 25. Replace small baffle and three hex head screws holding it in place.

  • Page 24: Section 10: Off-Season Storage

    SECTION 10: OFF-SEASON STORAGE The following steps should be taken to prepare lawn mower for storage. • Clean and lubricate mower thoroughly as described in the lubrication instructions. • Refer to engine manual for correct engine storage instructions. • Coat mower’s cutting blade with chassis grease to prevent rusting. •...
  • Page 25 Models 370 thru 389 Front Axle Assembly & Height Adjuster REF. PART NO. DESCRIPTION 611-0060 Axle Ass’y, Frt. 710-1348 AB Pan Scr. 1/4-14 x .50 Lg. 714-0104 Cotter Pin .072 x 1.12 Lg. 732-0820 Ext. Spring 747-0920 Adj. Rod 736-0105 Spr. Washer 738-0102 Shl.
  • Page 26 Models 370 thru 379 †† WHEEL ASSEMBLY CHART Tread Size Type Part No. 8” x 1.75” Bar Tread 634-0020 8” x 1.75” “T” Tread 734-1268 8” x 2” “S” Wave 734-1790 (Yellow Rim) 8” x 2” “S” Wave 734-1821 8” x 2”...
  • Page 27 Models 370 thru 379 REF. PART NO. 747-0824 Control Handle Ass’y (Std.) 647-0004 Control Handle Ass’y (Deluxe) 731-1639 Baffle 710-0605 Oval C-Sunk Mach.-Scr. 736-0501 Spr.Wash.66” I.D. 720-0279 Handle Knob 1/4-20 Thd. 646-0875 Throttle Body 712-0324 Hex L-Nut 1/4-20 749-0439B Upper Handle...
  • Page 28 Model 380 thru 389...
  • Page 29 Model 380 thru 389 REF. PART NO. 747-0824 Control Handle Ass’y (Std) 647-0004 Control Handle Ass’y (Deluxe) 731-1639 Baffle 710-0605 Oval C-Sunk Mach.-Scr. 736-0501 Spr.Wash..66” I.D. 720-0279 Handle Knob 1/4-20 Thd. 646-0875 Throttle Body 712-0324 Hex L-Nut 1/4-20 749-0439B Upper Handle 746-0876 Throttle Lever 746-0843...
  • Page 30 REF. PART NO. 732-0627 Shift Lever Spring 16864 6 Sp. Rack Cable Bracket 712-0414 Weld Top L. 1/4-20 16855 Pawl Plate 748-0381 Pawl R.H. 748-0188B Pawl L.H. (Not Shown) 738-0137A Shldr Scr. .340 x .285 10622B Spring, Rachet † Hub Cap 731-1685 Mulch Plug 731-1461...

  • Page 31: Shroud Chart

    Part No. Color Part No. 751B281439 Dark Red 731-1395A 751B281440 Black 731-1396A 751B281443 Bright Red 731-1397A Hardware: Hardware: 710-1256 (Screw) 710-1256 (Screw) Part No. Color Part No. 731-1402A Yellow 7510143208 731-1694 Black 731-1695 Silver 731-1934 Charcoal Hardware: Hardware: 710-1258 (Screw) 7510042823 (Screw) Part No.
  • Page 32 MANUFACTURER’S LIMITED WARRANTY FOR: For TWO YEARS from the date of retail purchase within the United States of America, its possessions and territories, MTD PRODUCTS INC will, at its option, repair or replace, for the original purchaser, free of charge, any part or parts found to be defective in material or workmanship.

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