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Bob77A

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About Bob77A

  • Rank
    Newbie
  • Birthday 05/09/1959

Contact Methods

  • Yahoo
    rch77a@yahoo.com

Wheel Horse Information

  • tractors
    1975 C-160 Automatic
    1976 B-60 8 speed, missing engine
    1974 C-120, for parts
    79370 Tiller
    86-42ST07 Snow Thrower
    06-42BC01 Snow/Dozer Blade
  • favoritemodel
    C160 Automatic

Profile Information

  • Location
    Springfield MA
  • Occupation
    Misplaced Mechanic From Another Time...
  • Interests
    Too many to list here.

Recent Profile Visitors

556 profile views
  1. The Repco FG 4175 15 amp voltage rectifier/regulator failed on my C160 Automatic after 41 years of service. It was overcharging at about 22 volts and the amp gauge was fluctuating over 15 amps. I found the terminals burned and the plastic connector melted. The alternator output on the K341 tested good. I did some research online and found what I believe was a equivalent replacement rectifier/regulator at DB Electrical. SKU: AKH6001 for $27.74 (including shipping). http://www.dbelectrical.com/p-11574-rectifierregulator-john-deere-kohler-engines-15amp.aspx?CAWELAID=130000240000002380&CAGPSPN=pla&gclid=CKm0n5j3m8YCFcURHwodPKEAtQ& The website said to call to verify the application. I called and spoke with a DB Electrical representative and they confirmed it was a replacement for the Repco FG 4175 15 amp rectifier/regulator. The only difference is that the spade terminals on the replacement are 0.187” instead of the 0.250” on the original. The length, width and mounting holes are the same. The height is ½” shorter, but with the new modern internal electronics the heat sink size is more than adequate. The price certainly was reasonable, so I ordered one. The new unit arrivedt he next day. Since my connector shell was already damaged , I crimped 3 single 0.187” insulated terminals on wire ends. The terminal location is identical and are clearly marked on the new unit. The replacement unit also has the provision for a ground wire. I highly recommend grounding the new unit with a wire to the battery ground point on the tractor. I use a single point star grounding scheme on all my electronic and power equipment. The AKH6001 rectifier/regulator charges and regulates at 14.3 volts (full speed and idle) with the lights on. The amp gauge is steady and decreases smoothly as the battery charges. I have run it now for over 6 hours for snow removal of the last two storms here in Springfield MA. It is keeping the 22 series battery properly charged. Note: Since I ordered my rectifier/regulator 2 weeks ago, there has been a price increase to $28.30 (includes shipping) on this unit. Still a great price for this unit.
  2. Blade tip. speed increase

    Hi: I am new today to this forum, but in the interest of safety I must respond. The United States of America Standards Institute, sponsored by the Outdoor Power Equipment Institute recommends for safety the maximum blade tip speed of 19,000 Ft./Min. Which means the tip travels 19,000 feet in 1 minute. Which is going 3.6 miles in 1 minute or about 215 mph in a car. Blade tip speed is caculated by the blade length and the rpm of the spindle it is mounted to. The spindle rpm for a 16" blade length/diameter would be 4,542 rpm to achieve 19,000 ft/min tip cutting speed. , The same spindle with a 24" blade length/diameter would be 3,023 rpm to achieve the same 19,000 ft/min cutting speed. The larger the blade length, the less spindle rpm needed to accomplish 19,000 ft/min. There are charts online that show what rpm is acceptable for different blade lengths (saves on doing the math). Blades fatigue while spinning and after cutting for awhile begin to stress crack. If you hit something hard, it accelerates the fatique. You can figure out what force the blade hits the grass (I am not going to do the math here) and if all is working properly the blade see's the grass as a solid object. You then get a clean cut. Speeding the blade tip speed up, can cause the grass to pull and tear especially after the blade dulls a bit> The lift wings on the blade are designed to lift the lawn at a specified rpm. Speeding up the blade actually causes the blade to lift less (I have seen this also with leaf blowers where people speed up the engine thinking it will blow more, it doesn't, it blows less). The wings also wear out faster at higher speeds. The biggest concern is that a blade will shatter and become a projectile at higher speeds. I have seen blades go right through most mower decks when they explode. I have repaired many decks after this happens. I can only imagine a blade fragment flying across the lawn into something or worse someone. If in doubt, contact the blade manufacturer for the correct blade tip speed they recommend for that blade. I don't want to see anyone get hurt or worse... My 2 cents worth. Bob H C-160 Automatic A hard working horse
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