1948 B, power lift, and 3 point hitch

T-Nason · Apr 26, 2021

Recently purchased a 1948 John Deere B. It came with a 3point hitch attached to the power lift rock shaft. I havent tried it out yet but have been told it can only go all the way up or all the way down. Could I use a box blade or a 3pt sickle mower on this? Any tips on operating such a system?

DeltaSteve · Apr 26, 2021

I have a 44 'A' with probably the same system. Yes you can use a box blade or mower or any 3 point implement.Only thing it has no 'draft' control. You have to manually control the hieght or depth with the handle.If you need to limit depth,you need to use a chain to control the depth.Just play with it some.Lift it some,try letting it down gradually. You will figure it out.BTW,the clutch has to be engaged before the three point will work.It's not 'live' like newer tractors are.

T-Nason · Apr 26, 2021

I dont have a handle to control it. I have a single pedal under the seat.

Pete in MD · Apr 26, 2021

Is your lift controlled by a pedal or pedals in front of the battery box or a lever to the side of the battery box? If the later, you have a Power-Trol which gives you position control of the hitch and implement.

T-Nason · Apr 26, 2021

I have a single pedal under the seat

Pete in MD · Apr 26, 2021

After I posted I saw your answer to DeltaSteve.

Changing your power lift valve to a Power-Trol is a simple and easy job.

T-Nason · Apr 26, 2021

Would I have to remove the entire power lift system? Any details on the flip? I was under the impression the power lift was a mechanical system

DeltaSteve · Apr 26, 2021

My A has the pedal under the right heel. there is a through shaft to the left connected to a factory cast handle. Nason,play with the padal a bit. See how it reacts when you step on it.When I move the handle to the rear,it raises. I can stop it when I return the handle to the center. Same with lowering. Move it too the front to to lower.Place the lever at the center to hold position.

T-Nason · Apr 26, 2021

I have a single pedal in the middle. I only have 2 handles one for the clutch and the other for the PTO

Pete in MD · Apr 26, 2021

The power lift and power-trol are both control valves that are mounted on the big rock shaft housing. You don't disturb the rock shaft housing when you change from one to the other.

Both valves are a combination hydraulic/mechanical device.

Go to jdparts.com and look at the free parts catalog PC-330. The rock shaft, power lift, and power-trol are on pages 102-110.

T-Nason · Apr 26, 2021

Where could I find a power trol valve?

Pete in MD · Apr 26, 2021

Model A, B, 50 and 60 all used the same powr-trol valve. This should make it easier for you to find one for your '48 B.

Here's one on eBay, there are others as well. This one has a plus in that it has quick connects already installed. Be careful, some sellers have a power lift but mistakenly call it a powr-trol.

Tractor salvage yards are another source.
Model 50 Power Trol

DeltaRed · Apr 26, 2021

The PTO has to be engaged for the lift to work.

T-Nason · Apr 26, 2021

So I would just unbolt my current valve on the tractor and bolt this one on? I could leave the pedestal with the seat and rockers alone?

Pete in MD · Apr 26, 2021

Yes, to both questions.

T-Nason · Apr 26, 2021

Thanks for the help!

1948 B, power lift, and 3 point hitch

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