[AT] Injection pump rebuild

[Cecil R Bearden]

Most of the time they charge more if we have worked on it......!!

Over the years I have spent a small fortune on injection pump rebuilds 
with pump shops.   Dad & I also passed on buying some equipment that we 
could have made some good monay on because the price of hte pump & 
injector rebuild would have shot any profit.   45 years ago, I made my 
own injector tester with a hand hydraulic pump and a calibrated gauge.  
I have sued it several times since.  I sure wish I could have done this 
when I worked at the tractor shop while going to college.  We would have 
made a small fortune.  The boss would have been dragging in tractors 
from all over.....

Cecil in OKla


On 7/27/2014 7:01 PM, jtchall at nc.rr.com wrote:
> Glad to hear a success story! Never had the need to go into one. Same story
> here, must be a super clean environment with all sorts of testing equipment,
> ordinary folks shouldn't open them up. Ever looked through a service manual
> for an older model tractor? A lot of them tell you everything you need to
> know. It just looks like there may be some specialized tools required and
> the need may arise for testing equipment. If the situation should ever
> arise, I may try it myself one day. Wonder if the repair shops charge more
> for pumps that are already taken apart?
>
> John Hall
>
>
> -----Original Message-----
> From: Cecil R Bearden
> Sent: Sunday, July 27, 2014 6:31 PM
> To: Antique tractor email discussion group
> Subject: Re: [AT] Injection pump rebuild
>
>
>> My JD 2270 swather was built in early to mid 70's.    I bought itabout
>> 3 months ago locally and spent a lot of time and about $1000 of parts
>> to get it back into shape.  When I bought it the PO said that the inj.
>> pump would plug with some little pieces of rubber at times and he
>> would just clean it out.  It would plug in the check valve in the top
>> cover of the Roosa Master pump.   I did not remember what this symptom
>> was at the time, but a week or so later, it came to me.  The Governor
>> drive ring in the pump  is made of 2 pieces with a rubber gasket like
>> piece that fits over some rivets on each piece to drive the governor.
>> Low Sulfur diesel and the new additives in fuel now tends to eat on
>> the rubber.  A new one made of polyethylene or ?? is the replacement.
>> I found a forum discussion about injection pumps on the tractor by net
>> forum ( I think) and got a email address for US Diesel who supplies
>> the parts.  There is a replacement governor ring that is solid, so I
>> ordered it.  A swather runs at a constant speed, so it would not need
>> a cushion between those plates.  I also ordered the seal kit and a bit
>> to remove the timing screw that is special to JD.  I put the parts up
>> and bought 2 repair manuals on the pump. one from IHC and the other
>> from ALLis.  2 days ago I started in the field and the swather cut
>> great, and traveled about 7 mph cutting 3-4 ft tall Johnson Grass,
>> clover and prairie grass mixed.  Great!!  Got to the end of a 3/8 mile
>> run and turned around to go back.  After about 250 ft, it began to run
>> down like it was out of fuel.  I worked with it for about an hour in
>> 105 deg heat.  It would run for about 45 seconds then just run down
>> until it died.  I opened up the pump and tied the shut off solenoid
>> with a wire to determine if that was the problem.  Same thing.  I made
>> a call to a diesel shop where I know the owner, and he said the
>> governor ring was shot.  He also said if I would take off the fitting
>> in the tip cover and let some fuel spill I could get it back home.  I
>> did, and got it home.
> I dug out my parts and searched for the manuals.  I could not find
> them.  I found a site on the internet where I could download the JD
> repair manual for the pump for $9 for the next 24hrs.  I got it and
> pulled the pump off and started working on the rebuild.  A lot of the
> parts included in the seal kit were just like a carb kit, you don't use
> all of them.  This morning I installed the pump and with a little work
> on getting the air bled, it worked great!   If I had wanted to go back
> together with the original type of governor ring, I would have only
> needed the seal kit.  $14 + shipping and the $12 bit to take out the
> timing screw.   As it turned out, I spent $85 on parts, and 5 hours on
> the overhaul, and it Works!!    Injection pumps have been such a mystery
> around here, there were never any books available and no parts.  It was
> always $500 to get one thru a shop no matter what the problem was.  I
> have a White 2-105 that has had the pump worked on 3 times because the
> top cover will leak after about 3 years.  $450 each time.  The same $14
> seal kit fits that pump........    Pump shops make those of us with the
> old equipment pay for their new test stands for the new stuff.........
> I had checked with the local pump shop here, and to rebuild this pump
> would have cost a minimum of $450 + parts.
>
> Just had to share this small victory.   I have wanted to be able to
> repair my inj pumps for years, finally it happened.
>
> Cecil in oKla
>
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