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+--- Thread: CAT 3126 long crank time (/showthread.php?tid=4103)
CAT 3126 long crank time - eggtrucks - 02-05-2019
Have a 99 kW T300 with Cat 3126 used for yard/jockey truck, so it gets started many times a day. It always cranks 3+ sec before it starts. Ive been told this is normal due to injectors needing oil pressure to fire. Is this normal every start even if 15 min apart? Or is there a check valve somewhere that could be bad?
RE: CAT 3126 long crank time - Rawze - 02-05-2019
I would think that it would be far less wear to let it run for the day instead of cranking it 5 or 6 times+. Most engine wear is typically from cranking.
An alternative would be to put a supplement electric oil pump on it? - just a crazy thought.
RE: CAT 3126 long crank time - Unilevers - 02-06-2019
put gear oil in it with the oil change, not kidding it will make a world of difference. About 1/8 of the total 75w90. As those old heui engines age they get lazy on the starting due to the pump/lines leaking slightly etc.
RE: CAT 3126 long crank time - flatbed94kid - 02-06-2019
(02-06-2019 )Unilevers Wrote: put gear oil in it with the oil change, not kidding it will make a world of difference. About 1/8 of the total 75w90. As those old heui engines age they get lazy on the starting due to the pump/lines leaking slightly etc.
Is gear oil still good when in the cold? Could the extra thick oil mixed thicken to much due to cold weather and make engine work harder?
RE: CAT 3126 long crank time - Rig Wrench - 02-06-2019
Went through somethin like this a couple months ago. Was the regilator on the back of the head. Was lettin fuel drain out of the head after it shut off. Worth a shot. 369-6662 was the part number I believe
RE: CAT 3126 long crank time - Rawze - 02-06-2019
(02-06-2019 )flatbed94kid Wrote:(02-06-2019 )Unilevers Wrote: put gear oil in it with the oil change, not kidding it will make a world of difference. About 1/8 of the total 75w90. As those old heui engines age they get lazy on the starting due to the pump/lines leaking slightly etc.
Is gear oil still good when in the cold? Could the extra thick oil mixed thicken to much due to cold weather and make engine work harder?
in extreme cold, a synthetic gear oil would have less issue with thickening. I think some people ovrlook this.