1490 slow starting

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User avatar
ollek
Posts: 4132
Joined: Tue Apr 10, 2012 1:20 pm
Location: South West Finland

Post by ollek » Mon Dec 23, 2013 2:10 pm

A typical battery used in Finland for 90-series tractors has following specs:
125 Ah capacity
700 to 800 cca
One of the most important things to remember is, that the battery has to be fully charged. The charging level can be low if the tractor is used for only short times between the starts. When temperatures are below -20 degrees C, even this size of battery can give problems for starting. We always use block heater for at least 2 hours before starting when temperatures are low as there is no point in starting a freezing cold engine. The cranking speed can be very low in cold climate, but it does not matter, as long as the engine can be started. So follow the following: Use a oil suitable for the temperatures, Use a big enough battery, keep the battery fully charged and maintained, look after the connections between battery and starter motor, use block heater and use thermostart.

User avatar
erkki
Posts: 2032
Joined: Sun Apr 09, 2006 12:02 pm
Location: North Finland

Post by erkki » Mon Dec 23, 2013 6:31 pm

Puuuffff. My tractors have had old batteries and new batteries in cold weather and in warm weather. Its true that 125 Ah is a good choice in any circumstances but the the last battery which I put in July to my 880 is some cheap Made in China 60 Ah only and works perfectly.

This is not purposely comment for experts who emphasize the condition and output of a battery, its just a comment from a guy who starts his DB by small battery without any problem. They do not last many years but an investment of 50 euro is not bad in every three years.

Cranking a 3.6 litre four potter is not that heavy duty. If cranking is lazy, first check the connections and even if the starter is new, if its made in opposite side of glope you cant be sure that it performs as supposed to.

I have seen old starters which have lost their power because of poor contacts of worn out brushes pushing the commutator. They do not have the performance by any battery, just hot wiring.

W.B.R erkki

Guest

Post by Guest » Mon Dec 23, 2013 8:03 pm

If the starter is new, don't forget, there are starter motors and starter motors. Electrical connections, battery, thermostart and everything else seeming ok, question I would ask is, is the starter motor of high enough rating to turn the engine fast enough?

User avatar
michael1490
Posts: 16
Joined: Sun Aug 23, 2009 10:47 pm
Location: ireland

Post by michael1490 » Tue Dec 24, 2013 1:37 pm

I will check all the connections after Christmas. the last few mornings have been very mild plus the tractor is parked in the shed with cattle,( passage way), so I,am waiting for a cold morning with a heavier battery. The new starter spins the crank a lot faster than the old one.
finaly have a Happy Christmas Ho Ho Ho :lol:

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