HPOP Disassembly? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 13 (permalink) Old 12-21-2009, 04:47 PM Thread Starter
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HPOP Disassembly?

Anyone have a procedure for disassembly of a HPOP? I have a used one that I want to experiment with. I don't intend to start competing with the aftermarket vendors, just curious about a few things.

Early '99 F250, 4X4, SuperCab, "PowerStroke", Auto,
PMT1 PCM, DP 80 tow
ISSPRO gauges
BDS front leveling kit
4" straight piped
Sinister pre-pump mod w/filter
Dick Cepek DC1 w/ Nitto Terra Grappler 325/65R18,

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post #2 of 13 (permalink) Old 12-21-2009, 07:09 PM
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Re: HPOP Disassembly?

check the library forum under 7.3 , there is an oem ford guide on hpops should have some diagrams etc..never had mine apart but the snap ring on the back will be a good start.

used ones are full of some pretty nasy oil so be ready with old towels etc

Early 99 f350 4x4 crew cab, auto. pmt2 pcm
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post #3 of 13 (permalink) Old 12-21-2009, 07:41 PM Thread Starter
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Re: HPOP Disassembly?

I got the snap ring and back over off. The factory & all the service manuals say that it is not field serviceable but if sombody put it together, it can be taken apart.
I just didn't want to trash it in the process. I have anything I need to fabricate special tools but I thought that if someone else had done it already then it might save me some time.
Found THIS ARTICLE but not much in the way of procedure or detailed info. I guess the people who do it are kinda tight-lipped about it.

Early '99 F250, 4X4, SuperCab, "PowerStroke", Auto,
PMT1 PCM, DP 80 tow
ISSPRO gauges
BDS front leveling kit
4" straight piped
Sinister pre-pump mod w/filter
Dick Cepek DC1 w/ Nitto Terra Grappler 325/65R18,

Annoy A Liberal....... Work Hard and Be Happy!
Please dont call me white or Caucasian. It offends me.
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post #4 of 13 (permalink) Old 12-21-2009, 11:44 PM
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Re: HPOP Disassembly?

If you read the article it notes that the pump parts are pressed in and you have to make fixtures and tools to disassemble it.

Probably the easiest and fastest way to take it apart would be to stick it in a band saw and cut it in half.

Dave

'08 F250 6.4/Torqshift Spartan 310EL, Flo-Pro 4", White_monster air intake, RCD 4-link, RS9000's 584/1330
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post #5 of 13 (permalink) Old 12-22-2009, 01:23 AM Thread Starter
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Re: HPOP Disassembly?

Quote:
Originally Posted by smokyred View Post
If you read the article it notes that the pump parts are pressed in and you have to make fixtures and tools to disassemble it.

Probably the easiest and fastest way to take it apart would be to stick it in a band saw and cut it in half.

Dave
Dave, dam boy! Why didun I think uh that!
Really did think of that but this is a good one. I think it's a 17 so I might
swap it for my 15 and sacrifice it....??? Or......
I would be happy to saw yours in half.....?????......NO?......Oh well......thanks for the idea.
Whit

Early '99 F250, 4X4, SuperCab, "PowerStroke", Auto,
PMT1 PCM, DP 80 tow
ISSPRO gauges
BDS front leveling kit
4" straight piped
Sinister pre-pump mod w/filter
Dick Cepek DC1 w/ Nitto Terra Grappler 325/65R18,

Annoy A Liberal....... Work Hard and Be Happy!
Please dont call me white or Caucasian. It offends me.
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post #6 of 13 (permalink) Old 12-22-2009, 01:43 AM
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Re: HPOP Disassembly?

I tried once, couldn't get the damn thing apart. It is pressed together and without some sort of jig there is no way to do it without destroying it.
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post #7 of 13 (permalink) Old 12-22-2009, 01:55 AM
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Re: HPOP Disassembly?

Quote:
Originally Posted by whitjo View Post
Dave, dam boy! Why didun I think uh that!
Really did think of that but this is a good one. I think it's a 17 so I might
swap it for my 15 and sacrifice it....??? Or......
I would be happy to saw yours in half.....?????......NO?......Oh well......thanks for the idea.
Whit
Since you have the back cover its easy to tell. 15* has a bearing, 17* has a bushing

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post #8 of 13 (permalink) Old 12-22-2009, 02:44 AM
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Re: HPOP Disassembly?

As I am sure you know their are a lot of thing people are tight lipped about. I have taken a few apart in the past to swap swashplates in the 94.5-95 trucks and I had taken pics of disassembly and assembly. Unfortunately they were on my Dell laptop that crapped out on me a few months ago.

The swashplate is pressed in. It has been almost a year since I have done one so it is hard to remember exactly but here the basics.

First step is pull the shaft, front seal and rear plate and drop a bolt in with a couple washers on it that are big enough they will not slide threw the barrel. I actualy had to grind the washers to fit just right. Then I put a washer and nut on the end coming out of the swashplate and tighten it down to compress the barrel and plungers to the swashplate.

Then you use the head of the bolt to push the whole assembly out the back side of the pump. If you do not have a press to do this with you can drive it all out with a hammer and a punch. Driving it out will usually gauld the edge of the the center of the barrel where the shaft comes threw but it will not hurt anything so don't worry about it.

Then when you put it all back together you just do everything in reverse and the bolt will hold the plunger, barrel and swash plate all together for easy assembly. Just be sure you clock the swashplate properly.
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post #9 of 13 (permalink) Old 12-22-2009, 09:33 AM
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Re: HPOP Disassembly?

Quote:
Originally Posted by whitjo View Post
Dave, dam boy! Why didun I think uh that!
Really did think of that but this is a good one. I think it's a 17 so I might
swap it for my 15 and sacrifice it....??? Or......
I would be happy to saw yours in half.....?????......NO?......Oh well......thanks for the idea.
Whit
You laugh, a friend of mine and I have thought about doing it, we just need a cheap pump. It would be a little messy though!

Dave

'08 F250 6.4/Torqshift Spartan 310EL, Flo-Pro 4", White_monster air intake, RCD 4-link, RS9000's 584/1330
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post #10 of 13 (permalink) Old 12-22-2009, 12:07 PM Thread Starter
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Re: HPOP Disassembly?

Quote:
Originally Posted by smokyred View Post
You laugh, a friend of mine and I have thought about doing it, we just need a cheap pump. It would be a little messy though!

Dave
Dave, just kidding!
If I had a junk one I had thought about just milling a slot
thru the housing to get a look inside. I bought this 17 pump to swap out for my the 15 on my early 99 so I really didn't want to trash it.
Somewhere along the line one may have to die in order to go thru the learning process.

Early '99 F250, 4X4, SuperCab, "PowerStroke", Auto,
PMT1 PCM, DP 80 tow
ISSPRO gauges
BDS front leveling kit
4" straight piped
Sinister pre-pump mod w/filter
Dick Cepek DC1 w/ Nitto Terra Grappler 325/65R18,

Annoy A Liberal....... Work Hard and Be Happy!
Please dont call me white or Caucasian. It offends me.
whitjo is offline  
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