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  1. #1
    Member
    Join Date
    Feb 2007
    Posts
    28
    Location
    Central North Carolina
    Tractor
    Mahindra 6500 2wd

    Default Bobcat 743B won't start

    All, It was cold yesterday when I attempted to start my 743b ('92, 3000 hours). When I first tried it, it turned over and even started and ran rough for about 5 secs before stopping. But then the battery got weak and wouldn't turn it over. I then tried jumping it from my truck ... it turned over some (although very slowly) but never ran. I disconnected the jumper cables and used a battery charger in "start-boost" mode. Now, nothing happens. I measure the voltage on the battery and was getting 12-13 volts. I noticed then that when I would turn the started key to the left (to warm the glowplugs)I could hear a faint click like a relay kicking in and then another faint click like the relay letting go. And when I turned the key to the right when I normally hear a distinct click, nothing happened (completely silent) ... needless to say, the engine never turned over. Isn't there a relay (or two) in the starter circuitry ... could that have gone bad ? If anyone can help, I would appreciate it (my cows are getting hungry). Thanks, Roger

  2. #2
    Gold Member
    Join Date
    Dec 2006
    Posts
    251
    Location
    Western Ontario
    Tractor
    Bobcat 553, 773, S185, Nh LS 160

    Default Re: Bobcat 743B won't start

    Quote Originally Posted by bludev View Post
    I then tried jumping it from my truck ... it turned over some (although very slowly) but never ran. I disconnected the jumper cables and used a battery charger in "start-boost" mode. Now, nothing happens. I measure the voltage on the battery and was getting 12-13 volts. I noticed then that when I would turn the started key to the left (to warm the glowplugs)I could hear a faint click like a relay kicking in and then another faint click like the relay letting go. And when I turned the key to the right when I normally hear a distinct click, nothing happened (completely silent) ... needless to say, the engine never turned over. Isn't there a relay (or two) in the starter circuitry ... could that have gone bad ? If anyone can help, I would appreciate it (my cows are getting hungry). Thanks, Roger
    Did you check voltage while glow plugs were on or while cranking. My guess is your voltake through thejumber cables and battery charger is too low
    while cranking.
    The only relay I'm aware of on a743 is the starter solinoid.
    Ken
    Dealer for Erskine ATI Wallenstein Baumalight Tracks Plus Dexter Axels & Wix.

    NH LS 160, Tn75da, Bobcat 773 S185 Longlist of Attachments
    www.skidsteerforum.com
    Location http://www.tagzania.com/item/21497
    NW Ontario

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