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HYDRO 70" TRIPLEX
OWNER'S MANUAL
Includes Assembly, Maintenance &
Parts Lists
For Serial Numbers 1586 & Up
NATIONAL MOWER CO. 700 Raymond Ave., P.O. Box 14299, St. Paul, Minnesota 55114-0299, U.S.A.
Phone (651) 646-4079 Fax (651) 646-2887
HYD70OM-8/99
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DECLARATION OF CONFORMITY according to Directive 89/392/EEC We NATIONAL MOWER COMPANY .............................................................................................................................................................. (Name of supplier) 700 Raymond Avenue, St. Paul, Minnesota 55114 U.S.A. .............................................................................................................................................................. (Full address of the man
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® NATIONAL HYDRO 70" TRIPLEX IMPORTANT National Mower Safe Operation Practices For Riding Mowers 1. Know control functions and how to stop quickly. READ THE OWNERS MANUAL. 2. Do not allow children to operate the mower. Do not allow adults to operate the mower without proper instruction. 3. Do not carry passengers. Keep children and pets at a safe distance from an operating mower. 4. Clear the work place of objects which might be picked up by the blades and thrown. 5. To start engine, o
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TABLE OF CONTENTS Declaration Of Conformity ............................................................................. 2 Safe Operating Practices .............................................................................. 3 Introduction ................................................................................................... 5 Receipt of Shipment ...................................................................................... 5 Specifications ...............................
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® NATIONAL HYDRO 70" TRIPLEX Lubrication ........................................................................................... 20 Painting ................................................................................................ 20 Belt Replacement ........................................................................... 20, 21 Coupling Alignment .............................................................................. 21 Storage .............................................
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3SPECIFICATIONS 3.1ENGINE SPECIFICATIONS 3.5MOWER SPECIFICATIONS TYPE: Twin Cylinder, Air Cooled NUMBER AND SIZE: 3 25" Reels ENGINE MODEL: Briggs & Stratton Vanguard REEL DIAMETER: 7" (17.8 cm) HORSEPOWER: 11.9 kw (16 hp) BEARINGS: Timken Tapered Roller COOLING: Ducted air flow BLADES: Six Alloy Steel Blades HEIGHT OF CUT: Adjustable: 1/2 to 2" (1.3 cm to 5.08 cm) 3.2TRANSMISSION OVERALL CUTTING WIDTH: 70" (177.8 cm) HEIGHT ADJUSTMENT: Roller Screw Adjustment TRACTION DRIVE: Direct cou
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® NATIONAL HYDRO 70" TRIPLEX 3.9NOISE EMISSION & VIBRATION 3.8DISPOSAL NUMBERS Sound: Operator Position, 88 dBA Petrol, Lead Free: ....................... 54104 Sound Power Level (LwA), 106 dBA Engine oil: ................................... 54112 Vibration*: Max. Vibration, 57.7 m/s2 RMS Fiberglass parts: ......................... 57103 Location, Left Hand Tires: ........................................... 57502 Operating Condition: Engine rpm-3200, Unit stationary Gear oil: ..............
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TRANSFERS, Continued 07408 07409 07407 3.11TRANSFER DESCRIPTION 07406 Do not exceed 25 degree slope. Located on main chassis. 07403 Parking brake on/off. Located on main chassis. 07372 Manufactures identification and specifications. Located on main chassis. 07257 Mowers up/reels off. Located on main chassis. 07256 Mowers down/reels on. Located on main chassis. 07405 Sound level at operators position. Located on main chassis. 07404 Sound power level. Located on main chasis.
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® NATIONAL HYDRO 70" TRIPLEX 4ASSEMBLY INSTRUCTIONS 4.1ASSEMBLY The Hydro 70 is shipped in two separate crates, one for the tractor and one for the cutting units. 4.2TRACTOR ASSEMBLY 1. Disassemble crating for the tractor carefully to prevent damage to components. SEAT SUPPORT 2. Remove the tape holding the keys in the steering shaft. Position the handlebar assembly over the shaft and key securing it with set screws provided it the handle bar. 3. For removal of handle bar see Section 8.12.
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ASSEMBLY OF REAR CUTTING UNIT, Con't. 4. Remove the two top fasteners holding the pivot 9. Remove the tie wrap attaching the cutting unit belts bracket to the cutting unit and loosen the bottom to the tractor. Position the cutting unit in front of the fastener so the bracket is free to rotate. tractor with the pulleys to the inside. Remove the two top fasteners holding the pivot bracket to the cutting. Place the belt on the cutting unit pulley. Assemble the 5. Align and assemble the spring
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® NATIONAL HYDRO 70" TRIPLEX 5GENERAL INFORMATION 5.1ENGINE Your vehicle is powered by twin cylinder, 4 b. Key should be removed when tractor is not cycle Briggs & Stratton Vanguard engine which uses in use to prevent unauthorized operation. unleaded gasoline, 85 octane minimum. DO NOT MIX OIL WITH GASOLINE! Engine speed is controlled by means of a throttle lever mounted on the left side of c. Refer to section 4.2 in the Hydro 70 console panel. Operators Manual for complete starting info
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5.8CHOKE When starting a cold engine, pull the choke The valve is located under the left shield on the control out to close the choke plate and allow a richer front side of the vehicle. With the engine OFF, turn fuel mixture to enter the engine. After the engine starts, knob to open valve and permit free-wheeling. Free- push the choke control about half way in to keep the wheeling valve must be closed during normal operation partially closed. Push the choke control all the way in to or tract
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® NATIONAL HYDRO 70" TRIPLEX 6OPERATION See Section 4.0 in the National Mower Hydro 70 Operators Manual for unit operation. 7ADJUSTMENTS 7.1ADJUSTMENTS TRACTION PEDAL TRACTION PEDAL Read each instruction completely and SAFETY SWITCHES make sure you understand it before making any adjustment. Follow all the safety precautions. THREADED ROD & ROD END PUMP CONTROL To avoid possible serious bodily injury, before making any adjustments or performing maintenance, place all tractor controls in Neu
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REEL CONTROL CLUTCH After loosening adjusting nuts on each side of the reel assembly, place a gauge plate under the ADJUSTMENT, Continued bedknife and roller measuring the distance between bedknife cutting edge and the rollers. Adjust front and If clutch idler is restricted from its proper rear rollers equally and insure that the bottom of the function, (engaging and disengaging reel belt drive), bedknife is parallel with the ground. After height of cut follow these steps. Refer to figure on t
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® NATIONAL HYDRO 70" TRIPLEX 7.8 BACKLAPPING PROCEDURE 7.6 REEL TO BEDKNIFE ADJUSTMENT Back lapping is a very important step in The reel is adjusted to a fixed position bedknife. maintaining sharp reel blades on the rear and wing This makes a more rugged and stable frame retaining mowers. adjustment longer. Many types of compounds are available for lapping. However, we recommend a good pre- mixed To adjust the reel to bedknife contact, turn the water soluble compound such as Pinhigh.
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BACKLAPPING PROCEDURE, Continued 5. Stop the reel and examine both bed knife and reel blades to see that the cutting edges are uniformly sharp. If not, gradually tighten hex adjuster and repeat Step 4 on previous page until the proper sharpness results. 6. Rinse off the compound thoroughly with water to remove all abrasive. Check for sharpness and readjust the bed knife if necessary. 7. Check reel adjustment on each mower and adjust if necessary, so that they will cut paper cleanly across the f
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® NATIONAL HYDRO 70" TRIPLEX 8MAINTENANCE 8.2ASSEMBLY & DISASSEMBLY Use the illustrations in the Parts Section as reference for the disassembly and assembly of components. Always maintain relative position of parts when To avoid possible serious bodily injury, disassembling. Clean and lubricate individual parts and before performing any adjustments, components as required. maintenance, or lubrication, place all controls in Neutral, lower the mowers to the ground, engage parking brake, turn
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8.4CHARGING A BATTERY 8.6FUEL FILTER 1. Remove the battery from the tractor before charging. Before servicing the fuel filter, thoroughly clean outside of filter housing and fuel hoses, dirt must not be 2. Be sure charger is Off. allowed to enter into fuel or fuel system. Refer to the engine manual for specific instructions. 3. Connect charger leads to battery. Connect the positive (+) connector from the charger to the positive battery terminal. Connect the negative () 8.7ENGINE connector
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® NATIONAL HYDRO 70" TRIPLEX 8.10HYDRAULIC OIL 8. 9HYDRAULIC HOSES 1. Hydraulic hose and tube lines should be inspected 1. The reservoir should be checked daily for proper every week to check for cuts, loose connections, level in the sight glass gauge on rear of the oil tank. kinks and wear. Oil level should be seen in the sight glass. 2. Park the tractor on a flat or level surface. Fully lower all cutting units. To avoid serious bodily injury, always lower mowers to the ground, place all 3.
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MAINTENANCE, Continued 8.13JUMPER CABLES Before attempting to jump the battery, check the condition of the battery, check the water level and 8.11HYDRAULIC OIL FILTER refer to the battery manufacturers instructions. 1. Stop the engine on vehicle with good battery. To prevent damage to the hydraulic system, the hydraulic oil filter should be changed after the first 25 2. Connect one jumper cable to positive terminal on hours of operation and every 250 hours thereafter. good battery. Connect
