Hydraulic Pump Upgrade - More Flow, faster FEL

[GuglioLS]

Here is a hydraulic pump upgrade to a Jinma 354. This particular pump will also bolt right up to a Kama 554 and perhaps many other models and brands of Chinese tractors.

First a little background -
My tractor shipped with a CBN-E310 pump. The FEL is super S.L.O.W, I was very dissatisfied with the speed. With a little investigation, I discovered that a larger pump (CBN-E314) was available. I obtained one and installed it. Performance was improved, but not yet fully to my satisfaction. After a little deeper investigation, I discovered many more different pumps manufactured to fit these tractors.

Here is a link www.hyd.net.cn/catalog/pump/cbk_s_n.htm

Working with Tommy at Affordable tractor sales he was able to find and import a CBN-E320 pump (20 ml/Rev) This is DOUBLE the flow output of the pump that shipped on my tractor. Tommy GAVE me the pump FREE to see if I could make it work, and to document the procedure so that others may upgrade their pumps as well. So a BIG thanks go to Tommy ;D

OK so here we go -

Tommy @ www.affordabletractorsalesco.com had Jerry send me the first pump. I received the correct one, it IS a CBN-E320 pump with a 4 spline shaft ;D

The Face Plate that comes with this pump is not compatible with a Jinma 300 series. HOWEVER all that has to be done is remove the face plate from your existing pump and swap it with the face plate on the CBN-E320. Then get a few longer metric bolts and your all set -

Here is a picture of the name plate showing it is a 320 pump (20 mL/rev)



This shows a comparison of the 3 types of pumps:



Front view of face plates - they can be swapped to fit my Jinma 354.




Larry

[GuglioLS]

Please note that the 4 cylinder Jinma's use a similar pump but with a slotted shaft v.s. the 3 cylinder 354's with a splined shaft. So if your's has the slotted shaft, the slotted shaft pump will need to me imported. It is available. Here are some pics of the same pump but with the slotted shaft:



Larry

[GuglioLS]

Now to swap the face plates -

First was to remove all four nuts and bolts to remove the face plate. Hold the pump with a pipe wrench or bench mounted vise as the nuts are very tight:



Then remove the face plate from your stock pump and put it on the new CBN-E320 pump:




Use the longer bolts that mounted your stock pump to the engine to attach the face plate to the body of the new E320 pump. 2 longer bolts (M10 X 1.5 X 130 mm long) will have to be purchased locally at a well stocked hardware store or bolt shop to mount the longer pump to the engine.



Very soon you will see if this longer pump will actually fit between the starter motor and engine.

Larry

[GuglioLS]

The following is OPTIONAL and only if you desire to eliminate the bolt on flat face o-ring seal on top of the pump and convert it to 1/2" NPT (Pipe Thread). I do not recommend this to everyone, as it involves completely disassembling and machining the pump:

The picture says it all. I will wait to see if the pump fits before I machine it -




Larry

[GuglioLS]

This pic shows how much longer a 320 pump is as compared to a 314 and a 310.



My tractor shipped with a 310 pump (very slow FEL), then I installed a 314 pump - better FEL speed, but still a little slow.

The purpose of all this is to speed up my FEL for both lift and dump, along with boosting performance of all my other hydraulic add-ons and mods.

Here are some pic's when Esther and I visited Tommy at his shop in April of 2006. We were on our way to Grand Cayman Island so we scheduled a 24 hour layover to visit him.






Larry

[GuglioLS]

Since the 320 pump is much longer than a OEM 310 or 314, First was to test fit the 320 pump to make sure it would go past the starter motor.

It just squeaks in there - takes a little patients, and angling but it will fit:



Well, now that I got it in there, I have to take it out now
This is because I need to transfer parts from the old pump to the new pump.




Larry

[GuglioLS]

The new pump was removed to transfer parts from one to the other and some machining.



The pump was taken completely apart so that the discharge port could be drilled out & tapped to 1/2" NPT - This step is OPTIONAL. I have only done this because I wanted a 1/2" port coming out of the pump for my convenience:




Larry

[GuglioLS]

This is what it took to drill and tap the output port of the pump. Again this is an optional step but something I wanted to do.

First was to clamp the pump down then center it under the drill:



Then drill out the output hole to 45/64" so that it could be tapped to 1/2" NPT:



Then Tapped:



The threads came clean and straight:



Then a fitting was screwed in to make sure it fit properly:




Larry

[GuglioLS]

Now it's time to re-assemble the pump. I replaced all OEM bolts.
The Bolts used to go through the body of the pump that hold the front and end plates together are M10 X 1.5 X 110 mm long:




The Bolts that go through the pump and attach it to the motor are M10 X 1.5 X 130 mm long:



Two main reasons for using new bolts is the pump is longer and does not come with bolts to attach it and --
2. The OEM bolt heads are to thick to allow clearance for the pump to fit. This shows the difference in thickness between the OEM bolt heads and some store bought ones:




Larry

[GuglioLS]

Now with all the bolt explanation out of the way. It's time to hard plumb the new pump and transfer the suction line over from the old pump to the new 320 pump.

I use Teflon liquid pipe compound:




From the front:




From the rear:




Found a new o-ring because I lost the other one in the dirt taking it apart



Good thing Harbor freight sells metric o-ring kits.




Larry

[GuglioLS]

Since the 320 pump body is longer, the hard suction line does not line up with it. Not a problem -




Under the back of the tractor there is an adjustable bracket with slots in it. Loosen the bolts to move the suction line so that it lines up with the suction line on the pump:



Now that the bracket has been loosened the suction line can now be aligned with the pump:



The new CBN-E320 pump is now installed and ready for testing:




Larry

[GuglioLS]

The moment of truth has finally arrived!

At 1500 engine RPM it takes 4 seconds to lift the FEL:



Now for all the details:
At 1500 RPM -
The old pump took 7 seconds to do what the new 320 pump can do in 4 seconds. You may think what the heck is the big deal? I want to install larger cylinders on my FEL for more lifting capacity, so this higher flow pump will allow me to do that so it won't take forever and a day to lift the FEL with larger bore cylinders.

For anyone wanting to verify the numbers, the cylinders I have now are 1.75" bore X 22.5" stroke. I calculate 7 gallons per min. with the new pump VS 4 GPM with the OLD pump. (at 1500 engine RPM)

A big thank you goes to Tommy @ Affordable Tractor Sales for finding these pumps, and for sending me one free of charge to install, test and evaluate.

I am impressed with the output flow! Thank you Tommy!

Larry

[Ronmar]

That 320 pump looks like a backhoe pump before you swapped the faceplates off it... Cool mod.

Ron

[baknblack]

gugliols said:

Please note that the 4 cylinder Jinma's use a similar pump but with a slotted shaft v.s. the 3 cylinder 354's with a splined shaft. So if your's has the slotted shaft, the slotted shaft pump will need to me imported. It is available. Here are some pics of the same pump but with the slotted shaft:



Larry

I'd like to have a 316 or a 320 with the slotted shaft for my 354c kama as it uses the same type as the 4 cyl jinma. Right now I've got a 314. It's ok but could use a little more speed.

Do you know if Tommy stocks either pump with the slotted shaft?

[GuglioLS]

Ron,

Yes that's exactly what it looks like, except for the long splined shaft. The BH pumps that bolt on above the PTO shaft have a short single slot shaft, at lease the ones I've seen anyway.

Dwayne -
Give Jerry at Affordable Tractor a call, I think they may stock the BH pump which as described above should fit. If Affordable does not have it, then I bet Chip at Artrac does. Let us know what you find out.

Ronald At Ranch Hand may have them to - I see Ronald Joined this forum, that is a very cool thing.

Larry