Loader slow until using 3 pt lift

kuducastle

New member

Equipment
L3600, KX121-3
Jul 13, 2026
3
0
1
Raleigh
Older L3600 with Bush Hog 2346QT loader, runs great but recently the loader operates very slowly unless I lift the 3 pt hitch or use very high throttle. Loader has often been used at its limit lifting heavy logs. I suspect some sort of stuck relief valve??. Both lifting cylinders have been replaced, no hydraulic leaks. With 3 pt lifting, loader seems to have normal lift capacity. Where do I start?
 

Fedup

Active member
Apr 6, 2016
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Winchester
What valve operates the loader? Is a part of the Bush Hog package? Does it have six lines on it or seven? Is it directly connected into tractor hydraulics or supplied from another valve?

That might offer a starting point.
 

TheOldHokie

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Equipment
L3901/LA525, G2160/RCK60, G2460/RCK60
Apr 6, 2021
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windyridgefarm.us
Older L3600 with Bush Hog 2346QT loader, runs great but recently the loader operates very slowly unless I lift the 3 pt hitch or use very high throttle. Loader has often been used at its limit lifting heavy logs. I suspect some sort of stuck relief valve??. Both lifting cylinders have been replaced, no hydraulic leaks. With 3 pt lifting, loader seems to have normal lift capacity. Where do I start?
Is the loader slow, weak, or both?
Does the bucket curl and dump normally?
Is this a Bush Hog loader valve or Kubota valve?
 

kuducastle

New member

Equipment
L3600, KX121-3
Jul 13, 2026
3
0
1
Raleigh
What valve operates the loader? Is a part of the Bush Hog package? Does it have six lines on it or seven? Is it directly connected into tractor hydraulics or supplied from another valve?

That might offer a starting point.
Bush hog valve controller, 6 lines, connected directly to engine.
 

kuducastle

New member

Equipment
L3600, KX121-3
Jul 13, 2026
3
0
1
Raleigh
Is the loader slow, weak, or both?
Does the bucket curl and dump normally?
Is this a Bush Hog loader valve or Kubota valve?
By itself, very slow and yes weak. When I pull up on the 3 pt, normal speed and strength. Bucket curls and dumps same speed as loader arms.
 

TheOldHokie

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Lifetime Member

Equipment
L3901/LA525, G2160/RCK60, G2460/RCK60
Apr 6, 2021
12,522
7,144
113
Myersville, MD
windyridgefarm.us
By itself, very slow and yes weak. When I pull up on the 3 pt, normal speed and strength. Bucket curls and dumps same speed as loader arms.
Something is blocking the down stream circuit.

Need more detail on this story.

Has the loader been working OK prior to this?
Where is the 3pt lever when its slow?
Does loader speed slow down when 3pt lift gets to top?
Is bucket slow when lift is slow?

Dan
 
Last edited:

North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
35,875
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Sandpoint, ID
Does the loader keep working when the three point lever is up position or does it only work when your moving the lever?
 
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