I.P diaphragm swop on a 2H

[2HH55F]

Have just replaced diaphragm which according to P.O hadnt been changed since new, now on 258K. Got some advise from Ted at Diesel Australia in Brisbane, these guys are super helpful, even pulled a pump off the shelf to show me what to do. Their advise was to chuck the split pin and washer, as its impossible for the diaphragm to slip off the rail pin. Was a little shocked to have oil run out when removing cover, obviously 20 + years of oil vapour through the rocker cover breather ??? The cover was 3/4 full of oil It would be good to know if there is a more sinister reason for this
The swop was really straight forward, hopped in and took it for a run, what a difference, it is already a sweet motor and is now so much more responsive I would strongly recommend looking at this on your next service, its the best $45 I have spent in ages.

 

[rchalmers3]

Why didgah replace it?

Was it blowing smoke or something?

Rick

 

[lostmarbles]

Have just replaced diaphragm which according to P.O hadnt been changed since new, now on 258K. Got some advise from Ted at Diesel Australia in Brisbane, these guys are super helpful, even pulled a pump off the shelf to show me what to do. Their advise was to chuck the split pin and washer, as its impossible for the diaphragm to slip off the rail pin. Was a little shocked to have oil run out when removing cover, obviously 20 + years of oil vapour through the rocker cover breather ??? The cover was 3/4 full of oil It would be good to know if there is a more sinister reason for this
The swop was really straight forward, hopped in and took it for a run, what a difference, it is already a sweet motor and is now so much more responsive I would strongly recommend looking at this on your next service, its the best $45 I have spent in ages.

Good work!
Some engine oil always gets through the seals and there is actually a plug there to allow you to periodically drain it.

See this link:
https://forum.ih8mud.com/diesel-tech-24-volts-systems/193714-1st-oil-drain-30-years.html


(Engine oil shouldn't be allowed to reach the leather diaphragm because it will damage it.)


There is also another plug to allow you to add a few drips of Neatsfoot oil (a leather-compatible oil) to the diaphragm from time to time in order to keep it soft/flexible.

Here's a photo:



And here's another useful link:

https://forum.ih8mud.com/diesel-tech-24-volts-systems/182948-3b-diaphragm-replacement.html

By the way ---- Leaving the split pin and washer off is not something I would do (even if it doesn't make any difference to the operation of the actuator).

Was it blowing smoke or something?

Rick

I hope you're not implying that he shouldn't have replaced it simply based on "maintenance schedule" requirements Rick.

I seem to remember the figure of "60,000 km" as being the normal replacement interval. I can't find it in my workshop manual right now but my owner's manual allocates the diaphragm an "R" for every 10,000km where "R" can apparently mean either "replace", "change" or "lubricate". (Talk about useless instructions! ----- And it give the same "R" for "injection pump oil" when that is actually fed from the engine and changed whenever you change your engine oil!!! I remember that that instruction cause me a lot of confusion when I first bought my BJ40 almost 30 years ago.)

 

[rchalmers3]

I hope you're not implying that he shouldn't have replaced it simply based on "maintenance schedule" requirements Rick.

I have no witty reply or any other form of deflection to offer.

Wait, here's one: "Oh, you mean Preventive Maintenance!!! I thought the acronym meant to do it in the evening!!! "

I was simply unawares. Clueless. Thank you both for the enlightment!!!

I'll bet the diaphram on my truck could use a little "evening work" as well!

Rick

 

[2HH55F]

No particular reason, just wasnt running consistently, could have blamed the local Diesel supply, some times went really well, sometimes felt sluggish. I was wandering around MUD and saw this easy logical bit of maintenance and the rest is history.

 

[2HH55F]

Thanks lost Marbles, I hope some other guys benefit from the info., appreciate your knowledge.
Cheers