Posted by jimb2 on November 08, 2014 at 05:54:16 from (99.241.118.87):
In Reply to: IH 674 ? 2 reservoirs posted by John Zitkus on November 07, 2014 at 07:47:51:
Hi John, There is no syncro on Lo/Hi but 1 to 4 should be syncro. We had a 674 without T/A and Dad upgraded to 684 with T/A.
Does your 674 have a T/A?
Take off the inspection plate under the clutch housing and inspect the pressure plate and PTO shaft splines. Since you have the hydraulic pump out, reach in and see if you can turn the PTO shaft which drives the hydraulic pump. You should not be able to turn the PTO shaft at the hydraulic pump drive gear. It is unusual that the hydraulic pump would quite all of a sudden unless the drive gear key shears or the PTO drive splines strip. Usually hydraulic pumps gradually become weaker over time and you have to rev engine to max to lift anything with the loader. Other possibilities are blown O-rings or other problems in MCV.
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