How to test hydraulic pressure on rear 3ph with no loader

[Russell King]

The tractor itself “probably“ has BSPP straight threads in most ports in the transmission case. I don’t know what would be used on the power steering system. The loader and valves are a guess on where they were built. You can generally figure out the ports by measuring the thread diameter but you will be a lot more confident in what you need if you use a hydraulic thread identification kit like this.

TRAUSCH DYNAMICS THREAD MEASURING KIT. KIT INCLUDES: (1) FRACTIONAL THREAD PITCH GAUGE, (1) METRIC THREAD PITCH GAUGE, (1) INSIDE/OUTSIDE DUAL MEASUREMENT CALIPER (INCHES & MILLIMETERS), (1) ANGLE SEAT GAUGE THAT INCLUDES 37 DEGREE, 45 DEGREE, 24 DEGREE AND 30 DEGREE, (1) 27-PAGE FLUID PORTS AND CONNECTORS IDENTIFICATION GUIDE, AND (1) CARRYING CASE FOR EASY AND CONVENIENT STORAGE. | Trausch Dynamics

1706410 - THREAD IDENTIFICATION KIT - TRAUSCH DYNAMICS THREAD MEASURING KIT. KIT INCLUDES: (1) FRACTIONAL THREAD PITCH GAUGE, (1) METRIC THREAD PITCH GAUGE, (1) INSIDE/OUTSIDE DUAL MEASUREMENT CALIPER (INCHES & MILLIMETERS), (1) ANGLE SEAT GAUGE T...

www.hydraulicstore.com

It is not important to get this particular kit but anything similar would help.

There are also hydraulic pressure test kits that may have adapters and gauges that you need in one kit.

Good Luck.

 

[TheOldHokie]

The tractor itself “probably“ has BSPP straight threads in most ports in the transmission case. I don’t know what would be used on the power steering system. The loader and valves are a guess on where they were built. You can generally figure out the ports by measuring the thread diameter but you will be a lot more confident in what you need if you use a hydraulic thread identification kit like this.

TRAUSCH DYNAMICS THREAD MEASURING KIT. KIT INCLUDES: (1) FRACTIONAL THREAD PITCH GAUGE, (1) METRIC THREAD PITCH GAUGE, (1) INSIDE/OUTSIDE DUAL MEASUREMENT CALIPER (INCHES & MILLIMETERS), (1) ANGLE SEAT GAUGE THAT INCLUDES 37 DEGREE, 45 DEGREE, 24 DEGREE AND 30 DEGREE, (1) 27-PAGE FLUID PORTS AND CONNECTORS IDENTIFICATION GUIDE, AND (1) CARRYING CASE FOR EASY AND CONVENIENT STORAGE. | Trausch Dynamics

1706410 - THREAD IDENTIFICATION KIT - TRAUSCH DYNAMICS THREAD MEASURING KIT. KIT INCLUDES: (1) FRACTIONAL THREAD PITCH GAUGE, (1) METRIC THREAD PITCH GAUGE, (1) INSIDE/OUTSIDE DUAL MEASUREMENT CALIPER (INCHES & MILLIMETERS), (1) ANGLE SEAT GAUGE T...

www.hydraulicstore.com

It is not important to get this particular kit but anything similar would help.

There are also hydraulic pre test kits that may have adapters and gauges that you need in one kit.

Good Luck.

Since we are guessing my bet is the PS tube is metric and the tube nut and cutting ring is a DIN 24 degree flareless tube fitting. Thread size M12, M14, or M16. x 1.5 The port itself may well be BSPP.

Dan

 

[haanzel]

Finally got a fitting that works, it was BSPP to a 1/4" NPT. Thanks for that.

I hooked it up, RPMS in the PTO range, raised the lever and nothing. The gauge didn't move. The rear 3PH did rise but it's weak which is what I am trying to solve. Why would it raise but nothing shown on the gauge? The gauge is brand new FWIW.

 

[TheOldHokie]

Finally got a fitting that works, it was BSPP to a 1/4" NPT. Thanks for that.

I hooked it up, RPMS in the PTO range, raised the lever and nothing. The gauge didn't move. The rear 3PH did rise but it's weak which is what I am trying to solve. Why would it raise but nothing shown on the gauge? The gauge is brand new FWIW.

Where was the gauge connected?
What is the max range of the gauge?

If you are connecting to the PS circuit you are measuring PS pressure which will not change with 3pt operation. Does the PS work?

Dan

 

[haanzel]

I connected it to the port next to the lowering speed adjusting knob. This one

How to test hydraulic pressure on rear 3ph with no loader

I don't have a loader so where would I hook up a hydraulic gauge to test the pressure on a L2600? Is it the PB hose? Most have a FEL so that makes the connection easy.

www.orangetractortalks.com

 

[TheOldHokie]

I connected it to the port next to the lowering speed adjusting knob. This one

How to test hydraulic pressure on rear 3ph with no loader

I don't have a loader so where would I hook up a hydraulic gauge to test the pressure on a L2600? Is it the PB hose? Most have a FEL so that makes the connection easy.

www.orangetractortalks.com

I don't know where that port goes. Assuming it's the lift cylinder its telling you the cylinder pressure is too low to register on your gauge. What's the max range of your gauge and what load did you have on the lift arms?

Dan

 

[haanzel]

Oops, forgot to add that detail. It's a 5K PSI gauge. Specifically this one https://www.amazon.com/gp/product/B0BCHPCDKD/

I thought that is the port you said to use. Was this incorrect?

 

[TheOldHokie]

Oops, forgot to add that detail. It's a 5K PSI gauge. Specifically this one https://www.amazon.com/gp/product/B0BCHPCDKD/

I thought that is the port you said to use. Was this incorrect?

Again, how much weight on the 3pt? If it's unloaded it may raise at a 100 PSI which will barely tickle that gauge. Put a load on it.

I don't know what I may have said about that port but if the lift is weak we already know cylinder pressure is low. The question is why.

I know I said to check PS pressure. If that's good you know the pump is not the problem and you are getting flow to the priority flow divider.

Dan

 

[haanzel]

It was empty, I will put a load on it and report back. Thanks