Injection pump replacement

[Paddy]

As noted on another thread, I have ordered a new injection pump for my KAMA 454 with a 395 T FD engine. I looked at Circle G tractor parts on line instruction. looks to simple!
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Once you have removed your old fuel injection pump, here's how to install your new pump and set the timing:

1) Rotate the engine until the #1 piston rises to its highest point. (Paddy => I plan to remove the valve cover and rotate engine until both valves are closed. Is this correct? I have compression release so it should turn over easy. Do most engines rotate CCW from view from the front looking back?)

2) Connect the new pump to all fuel lines, except for the top hard lines that connect to each injector. Do not connect the pump yet. (Paddy => what supports the heavy pump? Or do you bolt it on without gear?)

3) Press the primer pump to build pressure, open the bleeder valve to release air, then close the bleeder valve. Repeat until fuel comes out of the bleeder valve. (Paddy => I have replaced the mechanical primer pump with an electric primer pump. I suppose I can use a longer fuel line from E-pump and prime it)

4) Slowly rotate the fuel injection pump shaft. Stop rotating as soon as fuel rises to the top of the #1 hardline port. (Paddy => will the pump rotate easy? Or do yo use plyers? What direct does the pump rotate viewed from the seat? In a video I saw the Pump gear rotated CW from point of view, front looking back)

5) Install the pump onto the fuel injection pump gear and bolt pump to the timing gearcase.

6) This procedure should get your tractor running, but some fine-tuning may be required to achieve optimum performance. (Paddy => how do you fine tune? Does the pump have slots where it mounts?)

 

[thepumpguysc]

WOW… that’s bad.!!!

 

[Bob Rooks]

 

[Bob Rooks]

As noted on another thread, I have ordered a new injection pump for my KAMA 454 with a 395 T FD engine. I looked at Circle G tractor parts on line instruction. looks to simple!
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Once you have removed your old fuel injection pump, here's how to install your new pump and set the timing:

1) Rotate the engine until the #1 piston rises to its highest point. (Paddy => I plan to remove the valve cover and rotate engine until both valves are closed. Is this correct? I have compression release so it should turn over easy. Do most engines rotate CCW from view from the front looking back?)

All internal combustion engines rotate counter-clockwise as viewed looking at the flywheel. This is standard SAE rotation. SAE opposite rotation engines are found in marine applications.

2) Connect the new pump to all fuel lines, except for the top hard lines that connect to each injector. Do not connect the pump yet. (Paddy => what supports the heavy pump? Or do you bolt it on without gear?)

Gear is installed after the pump is mounted (I wouldn't connect any lines until the pump is mounted).

3) Press the primer pump to build pressure, open the bleeder valve to release air, then close the bleeder valve. Repeat until fuel comes out of the bleeder valve. (Paddy => I have replaced the mechanical primer pump with an electric primer pump. I suppose I can use a longer fuel line from E-pump and prime it)

Yes.

4) Slowly rotate the fuel injection pump shaft. Stop rotating as soon as fuel rises to the top of the #1 hardline port. (Paddy => will the pump rotate easy? Or do yo use plyers?

You can use a socket on the pump shaft nut to turn it.

What direct does the pump rotate viewed from the seat? In a video I saw the Pump gear rotated CW from point of view, front looking back)

The pump rotates in the same direction as the engine (just tighten the nut).

5) Install the pump onto the fuel injection pump gear and bolt pump to the timing gearcase.

This is confusing!

6) This procedure should get your tractor running, but some fine-tuning may be required to achieve optimum performance. (Paddy => how do you fine tune? Does the pump have slots where it mounts?)

The pump mounting flange is slotted, and you may have slots in the drive gear.

Good luck.

 

[Paddy]

Thanks guys!

If the TDC can be found by the #1 cylinder valves both being closed, then I won't need to remove radiator. Also, if I start the process at TDC, the only timing marks will be the pump drive gear.

 

[Bob Rooks]

Check the flywheel for timing marks.
I assume you've seen this already....

how do you change a fuel injection pump on a jinma tractor - Google Search

 

[thepumpguysc]

Both valve being closed is not TDC..
Bob has a great idea..check the flywheel..

 

[Paddy]

my flywheel inspection port is covered by the front end loader frame. Its a big deal to remove it. I recall reading TDC is when both valves are closed and rockers are loose. Then can I look at the timing marks on the gears to get exact?

 

[Bob Rooks]

Yes. You'll have to pull the front cover anyway.

 

[Paddy]

I watched the video again I think I better under stand. He saw the fuel pump inject plunger for cyl #1 rise. Then he rotated the front crank pully to be in line with TDC.

My injector pump does not have an inspection cover like his. So I will pull the fuel lines on the old pump and rotate engine until fuel start to rises. Then rotate crank pully to line up with TDC.