Yes & No. The short NO is it may take a few hours of "working" the tractor, using the PTO, and going down a long hill before you may see the defects.
Some quick tests:
Switch MP into High range, pick any gear and go up an incline, push your clutch in, (don't use any brakes), the unit should STOP . If the tractor starts rolling backwards by itself... the Multi-Power is not working.
Pick a safe hill , go down the hill in 1 or 2, should go steady down, If you "freewheel" (like you push the clutch in and start rolling real fast) the Multi-Power is not working.
As you can see, it can be very dangerous if it's not working properly let alone if you have an "independent" PTO, which most 154-4 had. This means the MP pump ties into the Independent PTO... Guess what... when one acts up... It's a Knee Jerk situation... you all of a sudden lose the PTO.
When all is said and done, with No Multi-power not working, No PTO not working... you've got a big mass of useless cast iron sitting there.
Well did you hear enough? /w3tcompact/icons/smile.gif