B6100 3 point slow weak

bbell762

New member

Equipment
b6100
Nov 12, 2016
5
0
0
Lynchburg Virginia
I ve been working on tractor a few days and getting frustrated. The arms are slow and weak. I watched a video of and put air pressure in transmission and the arms started moving faster and picked up a load. Does that mean the pump is bad? If so can I rebuild? Any Help is greatly appreciated.
 

CountryBumkin

New member
Lifetime Member

Equipment
BX2370 w/LA243, Bucket, Grapple, QA Pallet Forks, 60" MMM, rear blade & rake
Sep 27, 2015
568
4
0
Central FL
The hydraulic system's pressure relief valve may be bad. That could cause slow/weak hydraulics. Putting air in the hydraulics may be okay for testing (I have not heard of this), but not a good idea for regular use. You don't want to "aerate" the hydraulics which would cause foaming, poor lubrication and cooling, and bigger problems.

Do you have a place where you can easily connect a Pressure Gauge (like rear hydraulics coupler or a FEL with disconnect couplers)?
 

North Idaho Wolfman

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Staff member
Lifetime Member

Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
29,944
6,123
113
Sandpoint, ID
Putting air into the transmission would only cause oil to possibly be forced into the suction side of the pump, so yes helping the system out a little.

I wouldn't recommend doing it again as it very easy to blow out a bunch of seals and gaskets doing that. :eek:

Rebuilding the pump is not an option, you just replace it.
Need to know what model to give you the right pump P/N.

But you need to check the system out a little more before just throwing a pump into it, as it could be an issue with the control valve (rare), relief valve (not as rare), damage to either the three point piston, cylinder or rings (very common), or yes the pump.

If you follow the low pressure line from the pump and you run into a rectangle block, you can pull the plug out of the side of the block and install a pressure gauge and test the pressure, pressure will be almost nothing until you engage the three point control.
 

Chris123

New member

Equipment
B6100
Sep 4, 2021
2
0
1
Nantwich
Just thought I'd share in case it helps.
I had problems with 3pl slow and weak and after much searching decided to check the hydraulic filter at the bottom of the gearbox.
Totally clogged up so did a oil change and fitted a new filter and now works perfectly and much smoother.