867 looses power

[857lover 291]

so i have my 867and i noticed that when driving up a little hill or pull something with it that’s heavy the wheels stop spinning and the belt just gets smoked and when letting out the clutch in high 3rd it slowly build up to speed  but i took the belt shroud off and it works perfectly fine with it off any ideas ?

[squonk 41,104]

This sounds like the exact same problem you had a couple of months ago. Are the pulleys the stock ones ?

[857lover 291]

10 minutes ago, squonk said:

This sounds like the exact same problem you had a couple of months ago. Are the pulleys the stock ones ?

well the tractor is a 857 but i stuffed the six speed in there but the engine pulley is  2.5 inches and the transmission pulley is 4 inches

 

[857lover 291]

17 minutes ago, squonk said:

This sounds like the exact same problem you had a couple of months ago. Are the pulleys the stock ones ?

also i appreciate you and @Snoopy11 constant support as i have a couple tractors and they are always giving me troubles and i don’t want to give up on them but yes this is the same tractor that was before the engine went on it now the engine is good but i’m still having this belt issue 

[squonk 41,104]

15 minutes ago, 857lover said:

well the tractor is a 857 but i stuffed the six speed in there but the engine pulley is  2.5 inches and the transmission pulley is 4 inches

 

But are they the stock width? I seem to remember you had a pulley for a 5/8" belt on the engine and were running a 1/2" belt.You never told us if changing the pulley to the proper width cured it. How bout some pictures of your current kerfuffle? This sounds like the same tractor you were working on before.

Edited August 9, 2022 by squonk

[squonk 41,104]

11 minutes ago, 857lover said:

also i appreciate you and @Snoopy11 constant support as i have a couple tractors and they are always giving me troubles and i don’t want to give up on them but yes this is the same tractor that was before the engine went on it now the engine is good but i’m still having this belt issue 

Did you ever change that engine pulley?

[857lover 291]

1 minute ago, squonk said:

But are they the stock width? I seem to remember you had a pulley for a 5/8" belt on the engine and were running a 1/2" belt.You never told us if changing the pulley to the proper width cured it. How bout some pictures of your current kerfuffle?

yes i’m running a half inch pulley on the engine now and i believe the transmission pulley is a 1/2 aswell the belt is 1/2 but i belive it has somthing to do with the guard as it runs fine without it on

[857lover 291]

6 minutes ago, squonk said:

Did you ever change that engine pulley?

yes i dif

[squonk 41,104]

Let's have a close up of both pulleys with the belt on

[857lover 291]

4 minutes ago, squonk said:

Let's have a close up of both pulleys with the belt on

 

[Pullstart 62,852]

And both pulleys have keyways installed?

[Monstrosity 1,128]

Slack in the idlers? Maybe not routed correctly does the cover have the belt tabs on it? Clutch adjustment needs more tension?  (I don't have a geared tractor I have hydrostatic atm) 

Edited August 9, 2022 by Monstrosity

[squonk 41,104]

Non stock engine and engine pulley. Belt sitting deep in that pulley and bottoming out. Not enough oomph  ( mechanical advantage ) from the engine end to move the tractor up hills. Case closed .

[953 nut 55,223]

11 hours ago, 857lover said:

i took the belt shroud off and it works perfectly fine with it off

          Could be the arm on the idler pulley is catching in the belt guard not allowing it to make its full swing.

[squonk 41,104]

7 minutes ago, 953 nut said:

          Could be the arm on the idler pulley is catching in the belt guard not allowing it to make its full swing.

Probably the way the guard is mounted on the non-stock engine. It's amazing how a story evolves from an 857 with an issue to one where it had modifications. Never get the whole story right off the get go. Belt has line up issues as well.

Edited August 9, 2022 by squonk

[857lover 291]

36 minutes ago, squonk said:

Probably the way the guard is mounted on the non-stock engine. It's amazing how a story evolves from an 857 with an issue to one where it had modifications. Never get the whole story right off the get go. Belt has line up issues as well.

yeah but i’ve been having this issue since it had a k181 stock kholer on it with a stock pullru

[squonk 41,104]

These are the pics you provided. Pulley wasn't stock.

 

 

[857lover 291]

1 hour ago, squonk said:

Probably the way the guard is mounted on the non-stock engine. It's amazing how a story evolves from an 857 with an issue to one where it had modifications. Never get the whole story right off the get go. Belt has line up issues as well.

 

[Pullstart 62,852]

Try rotating the tab on your clutch idler forward so it grabs the belt when pressed but clears when it’s back.  It looks to me like the engine is too far back too, so the belt guard isn’t as effective as a clutch.  What is the measurement from the frame vertical to the engine crankshaft?

[857lover 291]

7 minutes ago, Pullstart said:

Try rotating the tab on your clutch idler forward so it grabs the belt when pressed but clears when it’s back.  It looks to me like the engine is too far back too, so the belt guard isn’t as effective as a clutch.  What is the measurement from the frame vertical to the engine crankshaft?

if i’m measuring from the spot i think your referring too 17 inches 

[857lover 291]

9 minutes ago, Pullstart said:

Try rotating the tab on your clutch idler forward so it grabs the belt when pressed but clears when it’s back.  It looks to me like the engine is too far back too, so the belt guard isn’t as effective as a clutch.  What is the measurement from the frame vertical to the engine crankshaft?

the tab is welded on 

[Pullstart 62,852]

2 minutes ago, 857lover said:

if i’m measuring from the spot i think your referring too 17 inches 

ok.  Measure this way (purple).  When mounting the new engine, for everything to work the best, the replacement crank needs to be in the same position height wise and length wise… then find a belt to fit.  It looks like your belt is too long, allowing the idler to stop before it creates tension.

 

 

[857lover 291]

3 minutes ago, Pullstart said:

ok.  Measure this way (purple).  When mounting the new engine, for everything to work the best, the replacement crank needs to be in the same position height wise and length wise… then find a belt to fit.  It looks like your belt is too long, allowing the idler to stop before it creates tension.

 

 

it’s 6 inches 

[Pullstart 62,852]

Also, using a square, measure from a known location (hole in the frame, mounting point of the sheet metal, etc.) to the crank in a horizontal direction.  These two measurements should be exact as possible to the original engine.

 

 

[Pullstart 62,852]

Take a picture of where you measure from on the orange measurement and I’ll compare to a stock 857.