Author Topic: Resurrection of a Deutz MAH 914, 1952? Lets see!  (Read 593 times)

sirpedrosa

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Resurrection of a Deutz MAH 914, 1952? a few more
« Reply #15 on: August 05, 2022, 06:31:45 PM »
1 - Intake valve spring, collets and spring carrier;
2 - Head is almost empty.  ;D ;D
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Wating for the Zündfix to fire up.

ajaffa1

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Re: Resurrection of a Deutz MAH 914, 1952? Lets see!
« Reply #16 on: August 05, 2022, 11:47:38 PM »
Nice work VP, everything looks to be in good condition and just needs cleaning. Looks like one of the pushrods is bent, probably from badly adjusted tappet clearance. Be careful when straightening it, some push rods are solid others are steel tubes with toughened inserts in each end, very easy to crush the tubular variety when straightening!
Keep up the good work and great photos.

Bob

sirpedrosa

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Resurrection of a Deutz MAH 914, 1952? First a word to Bob
« Reply #17 on: August 06, 2022, 12:45:39 AM »
Bob, Gentles

Clean and derust! Ill save as much as I can. Same history I said about the 12/2.

Think that bent pushrod was made by someone that tries to turn it over - full turn - after intake valve were stuck. This ones are steel tubes and thin!

And yes, Im back from downstairs (nothing like the evening to give me focus). And yes here we go with more good pics.

Cheers
VP
« Last Edit: August 06, 2022, 08:39:07 AM by sirpedrosa »
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Wating for the Zündfix to fire up.

sirpedrosa

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Resurrection of a Deutz MAH 914, 1952? Once upon a time a valve stuck.
« Reply #18 on: August 06, 2022, 01:07:03 AM »
Gentles

Here we go... again!

Remember that hydraulic press I made? Oh yes, gave it a dust clean tonight. Take a good look.

The first bang gave me a chill in the spine, thinking about what had brake. If the press or the valve. After all was just the valve going down.

Pics by order:

1 - Begin with 3 12mm nuts to catch momentum, just in case...
2 - After 2 bangs needed to take a nut out;
3 - After a few squeaks and some drops of wd40, and rests only one nut;
4 - And the brass nugget made it flat to the guide;
5 - A good travel down!
6 - Now a brass nut to go down with stem;
« Last Edit: August 06, 2022, 05:44:29 PM by sirpedrosa »
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Wating for the Zündfix to fire up.

sirpedrosa

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Resurrection of a Deutz MAH 914, 1952? Once upon a time a valve stuck.
« Reply #19 on: August 06, 2022, 01:12:16 AM »
A few more...

1 - Now a 8mm bolt after brass nut, and it came off.
2 - Not as bad as anticipated;
3 - Head is getting better.

PS: ANYONE CAN TELL ME IF I PRESS DOWN THE PRE CHAMBER IT PUSHES ALSO THE INJECTOR OUT?
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Wating for the Zündfix to fire up.

ajaffa1

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Re: Resurrection of a Deutz MAH 914, 1952? Lets see!
« Reply #20 on: August 06, 2022, 09:41:16 AM »
Hi VP, I have no idea how that pre-combustion chamber is held in place. It might well be that you could use it to press out the injector but there is a chance that it has a thread on it and is screwed in place. Feel free to give it a sharp tap with a copper faced hammer and see what happens. I would not be putting it in the press.
I would be refitting the valves and putting the cylinder head back on. Put about 10mm of oil in the cylinder and rock the engine into compression, hopefully the hydraulic pressure will blow the stuck injector out of it`s housing.

Bob

cobbadog

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Re: Resurrection of a Deutz MAH 914, 1952? Lets see!
« Reply #21 on: August 06, 2022, 11:56:03 AM »
It can only be a guess to say yes push down on the pre-combustion chamber to push the injector out but I would also want to make an adaptor o fit under the injector so that a small amount of lift could be applied as some pressure on the pre-combustion chamber. Again I woul make an adaptor that would fit nicely around the chamber but not touch the raised section.
Lots of pre-soaking and maybe some or a lot of heat to assist in it's removal.
Coopernook - the centre of our Universe.

sirpedrosa

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Resurrection of a Deutz MAH 914, 1952? Nice tips always wellcome!
« Reply #22 on: August 06, 2022, 01:20:21 PM »
Bob, Cobba, Gentles

Thanks for your tips, always related to the topic.

As far as my research got, I think prechamber is hold in by injector nozzle cap nut, with copper washers among there.

Let see some pics about (Still need shop manual);

1 - The injector body (pic from net, off course, mine is worst);
2 - The fuse holder and nut;
3 - The prechamber on place;

Now lets see: In this case fire holes are opposite fuse hole, therefore...the right pre chamber will be...

4 - this one... is it? As you can see there is a hole to the fuse in front of fire holes;
5 - Its the same prechamber, but it has another fuse hole behind fire holes (and missed the dowel to align fuse hole);
6 - Diferent view of prechamber.
« Last Edit: August 06, 2022, 05:46:57 PM by sirpedrosa »
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Wating for the Zündfix to fire up.

sirpedrosa

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Resurrection of a Deutz MAH 914, 1952? Prechamber...
« Reply #23 on: August 06, 2022, 01:25:13 PM »
Now we can compare another model to see difference.

I can see is the outer diameter (thinner than mine) and length of pre chamber.

Thoughts are welcome.

Cheers
VP
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Wating for the Zündfix to fire up.

ajaffa1

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Re: Resurrection of a Deutz MAH 914, 1952? Lets see!
« Reply #24 on: August 07, 2022, 12:21:00 AM »
I`m with Cobbadog, lots of soaking, maybe a little heat. Only apply pressure to the outside edges of the chamber (have a look in your box of sockets, one of them might be the perfect size).
Go easy with the press, good luck.

Bob

sirpedrosa

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Resurrection of a Deutz MAH 914, 1952? More stripping!
« Reply #25 on: August 08, 2022, 01:57:23 AM »
Bob, Gentles

Thanks, again for your tips.

Let the head under pressure at press with that right socket, but nothing moved along the day.

Made a ride with #1 (see other thread) and at evening give a visit to the german iron. Governor linkage came off, and fuel pump too!

All to much rusted! Lets see how things will get after clean.

A few pics to joy.

Cheers
VP
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Wating for the Zündfix to fire up.

cobbadog

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Re: Resurrection of a Deutz MAH 914, 1952? Lets see!
« Reply #26 on: August 08, 2022, 11:48:19 AM »

if your injector is the same style as in reply 23 then pressing it out from that side appears to be the way to go. Keep soaking and a small amount of pressure and maybe introduce some heat. Even heating and spraying with WD40 to get it to draw in deep and quicker. If still no joy then more heat is how I would aproach it
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sirpedrosa

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Resurrection of a Deutz MAH 914, 1952? Prechamber pushing injector
« Reply #27 on: August 08, 2022, 02:52:14 PM »
Cobba, Gentles

The injector is that you can see at reply 22 (mine more rusted, as you can see at 18).

I found there is a notch at injector hole - under feed thread - thats goes all way down (did you notice that prechamber notch?) to set both prechamber and injector.

Its well soaked witd ATFCetone, and the metric 23 socket is the right measure to put under the press.

Wilst that am amusing with other bits.

Cheers
VP
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Wating for the Zündfix to fire up.

ajaffa1

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Re: Resurrection of a Deutz MAH 914, 1952? Lets see!
« Reply #28 on: August 09, 2022, 08:59:08 AM »
Hi VP, if all else fails you can dismantle the fuel injector where it is, remove the inlet nipple, then unscrew the injector body from the stuck injector nozzle. Remove the internal working parts inside the injector nozzle and place in a jam jar full of diesel.
I don`t know what thread there would be in the injector nozzle but it is probably BSP, NPT or Metric fine, if you can find a piece of suitably threaded rod you can probably pull it out from above using a large washer and nut.

Bob

sirpedrosa

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Resurrection of a Deutz MAH 914, 1952? disaster striked
« Reply #29 on: August 10, 2022, 10:08:47 PM »
Gentles

Mechanic job without the book is a good recipe to disaster.

Neither taking all care could avoid it (for my point of knowledge).

The injection pump was going too well on stripping... just, but just last thing was the plunger and plunger guide to come off.

The plunger was very stuck, and put it under the press... and puted force inside the hole instead at the hedge. IT BROKE!

Some pics from my very sad day!

Cheers
VP

PS: Damn stupidity!

« Last Edit: August 10, 2022, 10:48:41 PM by sirpedrosa »
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!
Deutz MAH 914, 1952 - Wating for the Zündfix to fire up.