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(DIR) Return to: Restorations
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#Post#: 55924--------------------------------------------------
Restoration of a mid 1960's Jensen 50 (PART C...final installmen
t)
By: IndianaRog Date: March 10, 2023, 8:20 am
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This last installment of my restoration is dedicated to good
steam friend Bruce of St. Paul Steam (SPS). Bruce kindly
machined a handful of parts to replace worn or missing bits on
this engine.
Serious "clunking" as this engine operated on air (or
steam)...led Bruce and I to pinpoint several worn parts that
contributed to noisy operation.
First culprit was a very worn eccentric on the engine's axle
that controlled operation of the slide valve AND water pump.
Left example was the original showing significant wear. Right
is Bruce's replacement which fit and worked perfectly (and
quietly).
[attach=1]
Second culprit was a sloppy, worn crank screw which a prior
owner tried to reduce slop by using a short piece of silicone
tubing stretched over the brass bit...it did not work well at
all.
[attach=2]
Here is the machined solution by Bruce, a properly sized brass
sleeve with threaded inside. The screw threads into this and
then attaches the connecting rod to the crank arm making for a
perfect, no slop fit!!
[attach=3]
On receipt of this engine, I noticed the stay rod (which passes
end to end thru boiler), was loose on the face end with
portholes. It would wiggle but acorn nut that should have
tightened it up was frozen in place to the stay rod. Only
solution was to remove the stay rod completely by cutting off
the face end's threaded stud. With significant manipulation, the
old stay rod was removed. I made careful measurements, emailed
same to Bruce and he machined a new, heavier rod and a couple of
innovative threaded end studs that made it possible to fit it
back inside an existing boiler.
[attach=4]
Here is the new, more robust stay rod with new end fittings...it
went into the boiler beautifully and with a couple of teflon
gaskets on the ends and the original acorn nuts...it sealed
perfectly
[attach=5]
The hits just kept coming....Just prior to getting the boiler
re-nickeled, I noticed one of the bushings into which the
immersion rods screw was loose...so loose it would have never
kept steam pressure...not noticeable under air pressure, BUT
under steam it would have leaked badly.
[attach=6]
I'm pretty good at soldering, but this was a very critical
repair requiring a high temp torch and high temp solder...again,
Bruce rose to the occasion. This next photo shows the two new
555 watt immersion rods screwed into the newly soldered bushings
then all re-nickeled. The resoldered spots don't show,
concealed by the chimney stud, though I quite like how they
look...robustly soldered in for sure.
[attach=7]
I was getting concerned I would wear out my favorite machinist
with one repair after another...but Bruce noticed my oiler cup
on top of the cylinder, had a crude steel grub screw for a cap.
[attach=8]
Voila, I have a new brass threaded cap hand knurled and nickel
plated no less.
[attach=9]
I like to put a name tag on a finished project and wanted to
acknowledge Bruce's contribution...a sincere thank you sir!
Also a shout out to Gil and Charlie who helped fine tune this
engine on a recent steam up at Bruce's workshop.
[attach=10]
The finished project
[attach=11]
And a short video to prove it actually runs and runs great:
(HTM) https://youtu.be/D0Z6SSWQU-M
#Post#: 55928--------------------------------------------------
Re: Restoration of a mid 1960's Jensen 50 (PART C...final instal
lment)
By: D E Jones Date: March 10, 2023, 11:27 am
---------------------------------------------------------
That thing is really beautiful, and runs good too. Someone in
the past really did run it hard, but spared the oil it seems.
Since I have always liked to maintain and lubricate things, I
cannot imagine having such a premium machine, or any machine for
that matter and neglect taking care of it.
D. E. Jones
#Post#: 55932--------------------------------------------------
Re: Restoration of a mid 1960's Jensen 50 (PART C...final instal
lment)
By: txlabman Date: March 10, 2023, 1:43 pm
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Awesome Teamwork Rog!
It really is a finely restored J50.
#Post#: 55933--------------------------------------------------
Re: Restoration of a mid 1960's Jensen 50 (PART C...final instal
lment)
By: txlabman Date: March 10, 2023, 1:43 pm
---------------------------------------------------------
And thank you for an awesome three part restoration thread. ;D
#Post#: 55934--------------------------------------------------
Re: Restoration of a mid 1960's Jensen 50 (PART C...final instal
lment)
By: Stoker Date: March 10, 2023, 2:37 pm
---------------------------------------------------------
This series has been a real "inside" look at the restoration of
a Jensen 50 .... always a very worthy topic.
Thanks for sharing all of this with us Rog, and thanks also to
you Bruce, for making it all this much easier for Rog to do what
had to be done to bring this magnificent beast back from the
brink!
#Post#: 55953--------------------------------------------------
Re: Restoration of a mid 1960's Jensen 50 (PART C...final instal
lment)
By: St Paul Steam Date: March 10, 2023, 11:02 pm
---------------------------------------------------------
A very nice tutorial of a quality restoration of a worthy
candidate. Rog Was an early mentor to me in this hobby, being
very patient with me and always helpful, the fact that I could
help out a friend with a few machined bits and bobs was a
privilege for me. One thing I haven't seen mentioned was the
delivery system we had put in place where I would bring the
parts to work and hand it to a driver that runs Martinsville
area to hand deliver to Rog at whatever stop the driver happened
to be going to (Rog would meet him), my boss was ok with this as
it didnt take the driver away from his duties and it got many
parts delivered and picked up the same day which reduced
shipping times by days per occurrence (& for free) it worked
flawlessly.
Well done on a fine restoration Rog, now time to enjoy your work
for years to come. Cheers 😊
#Post#: 55955--------------------------------------------------
Re: Restoration of a mid 1960's Jensen 50 (PART C...final instal
lment)
By: classixs Date: March 11, 2023, 1:32 am
---------------------------------------------------------
Amazing job as always Roger!
Well done to all involved, and thank you for sharing.
#Post#: 55957--------------------------------------------------
Re: Restoration of a mid 1960's Jensen 50 (PART C...final instal
lment)
By: IndianaRog Date: March 11, 2023, 6:39 am
---------------------------------------------------------
Thanks all for the kind words... I may becoming a one trick pony
restoring only Jensen 50's/51's...but it is a labor of love, so
I will keep up with it.
cheers,
Rog
#Post#: 56285--------------------------------------------------
Re: Restoration of a mid 1960's Jensen 50 (PART C...final instal
lment)
By: Woe is me Date: March 28, 2023, 12:19 pm
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Beautiful job Roger and friends. You sure brought it up to the
level it deserves.
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