Gebruiksaanwijzing /service van het product 09167SL van de fabrikant Toro
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Rot ary Mower Basics PART NO. 09167SL.
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Rotary Mowers 1 Toro University Technical Training Table of Contents Historical Ba ckground ...................................................................................................... 2 Theory of O peratio n ................................
2 Rotary Mowers Toro University Technical Training Historical Background The first practical concept of a rotary type mower goes back to the 1930's. The concept evolved from the need for a grass maintenance tool that could cut long grass acceptably without the cost and sophistication of a reel mower.
Rotary Mowers 3 Toro University Technical Training Improvements in engines and drive systems have resulted in the very effective commercial type rotary mowers that are presently available.
4 Rotary Mowers Toro University Technical Training Theory of Operation Dec k h ous ing Blade Blade mou nting and d ri v e s y s tem There are three basic structural members to a rotary cutting unit.
Rotary Mowers 5 Toro University Technical Training Power transfer from the engine to the blades is typically done by way of belts and transfer shafts. Belt drives typically transfer a high percentage of the available horsepower to the blade and generally produce much less noise than hydraulic drive systems.
6 Rotary Mowers Toro University Technical Training Cutting Action Cutting action A rotary mower cuts grass by impacting the blade cutting edge against the grass blades at a very high velocity. This cutting action requires that the blade cutting edge is sharp and rotating at an adequate speed.
Rotary Mowers 7 Toro University Technical Training Rotar y mower clip To understand rotary cutting theory you must understand the concept of clip. Clip can be defined as the forward distance traveled by the cutting unit during one revolution of the blade.
8 Rotary Mowers Toro University Technical Training Equipment Application Rotary mowing equipment is designed for a specific application. The misapplication of rotary mowing equipment can only result in abuse, poor qualities of cut and costly downtime.
Rotary Mowers 9 Toro University Technical Training Capabilitie s and limitation s Capabilities and limitations Rotary mowers will not give the manicured cut appearance of a reel mower, but will give an acceptable appearance in more varied and adverse conditions.
10 Rotary Mowers Toro University Technical Training The Importance of the Operator and Equipment Manager The large investment in specialized cutting equipment cannot be jeopardized by unqualified operators.
Rotary Mowers 11 Toro University Technical Training Productive Equipment Operation Experience has shown that a high percentage of the problems that develop on turf equipment do not require an overhaul or disassembly type correction.
12 Rotary Mowers Toro University Technical Training Wheel tra ction and hill cli m bing Wheel traction Tire pressure in the traction wheels is critical for maximum traction capability. Over-inflated tire pressure can cause spinning and tearing out of the turf in adverse conditions.
Rotary Mowers 13 Toro University Technical Training Mow ing pat te rns Mowing patterns It is normally beneficial to cut a given area in a pattern that will allow the grass to re discharged onto the previously cut grass area. If this is not done, the horsepower requirement increases due to the blade having to cut the discharged grass again.
14 Rotary Mowers Toro University Technical Training Transporting mowing equipment Transporting mowing equipment Transporting mowing equipment requires discipline and knowledge to reduce downtime and increase equipment life. Operating the equipment in an abusive manner while transporting can only reduce its mowing efficiency.
Rotary Mowers 15 Toro University Technical Training Cutting Unit Adjustments Heig ht of c ut and att itude Height of cut adjustment and attitude The height of cut is usually set by the placement of spacers on the castor wheel shafts or with the height of the rollers on contour type cutting units.
16 Rotary Mowers Toro University Technical Training Inspection Maintenance and Repairs Cutting e ff iciency and ai r flow The efficiency of a rotary cutting unit is directly related to the air flow within the deck. Inspect and clean out periodically to mainta in air flow The underside of the cutting deck should be examined periodically.
Rotary Mowers 17 Toro University Technical Training Spind le as sem b ly Housing Shaft Spacer and Seal Surfa ce Pulley Seals Mat che d Bea rin g Set The deck spindles usually run at approximately 2000 to 2500 RPM. They feature tapered roller bearing for impact resistance and durability.
18 Rotary Mowers Toro University Technical Training Inspecti ng drive b elts and p ulleys • Oil or grea se contam inati on •D e b r i s i n p u l l e y s • Da maged or ru s ted pull eys • P rope r install atio n and te nsioni ng Periodically inspect drive belts and pulleys.
Rotary Mowers 19 Toro University Technical Training Belt no ise Belt Chir p • Chirp occurs on all types o f belts. • Caused by momentary slippage. • Dust can be a contribut ing f actor. • Never apply belt dress ing. • Chirps or squeaks w i ll not harm belts.
20 Rotary Mowers Toro University Technical Training Rotary Blade Inspection and Sharpening Inspect the b lad es To assure a quality of cut. The cutting edge of the blade must be kept in a sharp condition. A dull blade will produce a ragged cut and will require an excessive amount of engine horsepower to rotate the blade.
Rotary Mowers 21 Toro University Technical Training The most common causes for rotary mowers not giving a good quality of cut are due to dull cutting edges and/or bent blades. Caution: Check cutter blade daily or before mower is used or stored and whenever mower is serviced.
22 Rotary Mowers Toro University Technical Training OEM Blades • S pecificall y desig ned f or the int end ed d eck. • Me ets all of the re quir ed tests . – Hardness – Obj ect expulsion • Me ets th e mo wing an d qu alit y dem an ds. • Li fe e x pec tanc y.
Rotary Mowers 23 Toro University Technical Training Check blade balanc e After the blade has been sharpened the balance must be checked. This can best be accomplished using a commercial balancer. An unbalanced blade causes vibration damaging to adjoining parts.
24 Rotary Mowers Toro University Technical Training.
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