1st oil drain in 30 years!

[aussie75series]

I oil my IP every second oil change.The oil is saddle leather dressing oil,to stop the diaphram from drying out.The oil I use is called Neatsfoot oil.I have been doing this for 25yrs but now I have to race to the shed and llok for a drain plug I never new existed.

 

[Estancio]

Oiled my IP diaphram for the first time a few weeks ago when this thread came up.
Opened it up, slid it out, massaged the oil into the leather with my fingers, reinstalled it. Used synthetic engine oil. The leather was still in excellent condition considering 24 years of use.

 

[lostmarbles]

I oil my IP every second oil change.The oil is saddle leather dressing oil,to stop the diaphram from drying out.The oil I use is called Neatsfoot oil.I have been doing this for 25yrs but now I have to race to the shed and llok for a drain plug I never new existed.

Note that the drain is for the OTHER side of the diaphragm so it won't be capable of draining any excess Neatfoot oil.

Oiled my IP diaphram for the first time a few weeks ago when this thread came up.
Opened it up, slid it out, massaged the oil into the leather with my fingers, reinstalled it. Used synthetic engine oil. The leather was still in excellent condition considering 24 years of use.

Hmmm. I wonder how synthetic engine oil affects leather

Not something I would try Estancio.

 

[aussie75series]

You only use 2/3 drops of neatsford oil.

 

[keving]

The drain plug on my 85 has a factory tube running from it down to underneath the pump to where it would drain. Doesn't look like it has ever been used so I'd better open er up and see what comes out.

 

[Garry]

I just went out and unwound the bung on my diaphram housing and all I got was a small dribble of old black oil, not even enough to form a drip. Not bad for probably close to 27 years

 

[hedydd]

just to clear a few misapprehensions up.

In-line stand-alone injector pumps work by pistons being actuated by a small camshaft. Older ones have a level plug in the side, which is what some of you consider to be a drain plug, and a drain plug underneath the unit. The level plug should be removed periodically and the excess drained because diesel fuel can slowly leak past the piston seals causing the level to rise. For this reason the oil should be changed for fresh engine oil every few years.

Newer pumps of this type might have a constant feed and return of engine oil from the crankcase to keep the pump sump topped up. This type might still have a level and drain plug but will be maintenance free. Check out for a small oil feed and return pipes from the engine block to the pump.

 

[hedydd]

The drain plug on my 85 has a factory tube running from it down to underneath the pump to where it would drain. Doesn't look like it has ever been used so I'd better open er up and see what comes out.

That is to drain any excess caused by diesel contamination.
These things were commonly fitted to trucks and tractors up to the early 1990's. Usually Simms or CAV Minimec or Bosch on non-oriental kit.

 

[lostmarbles]

just to clear a few misapprehensions up.

In-line stand-alone injector pumps work by pistons being actuated by a small camshaft. Older ones have a level plug in the side, which is what some of you consider to be a drain plug, and a drain plug underneath the unit. The level plug should be removed periodically and the excess drained because diesel fuel can slowly leak past the piston seals causing the level to rise. For this reason the oil should be changed for fresh engine oil every few years.

Newer pumps of this type might have a constant feed and return of engine oil from the crankcase to keep the pump sump topped up. This type might still have a level and drain plug but will be maintenance free. Check out for a small oil feed and return pipes from the engine block to the pump.

That is to drain any excess caused by diesel contamination.
These things were commonly fitted to trucks and tractors up to the early 1990's. Usually Simms or CAV Minimec or Bosch on non-oriental kit.

Hi hedydd

The "neatsfoot oil drip-application plug" and "engine oil drain plug" (that we refer to here) are on the "pneumatic governer" rather than being on the main body of the IP that houses the cams and pistons.

So what you say here isn't relevant.



PS.
My Owners Manual lists "changing the oil in the IP" as part of my maintenance procedures but it doesn't actually apply to my 1979 BJ40 because my IP shares the same oil as my engine (pressure-fed from the engine's oil pump).

And it has always been of interest to me to find out how old a B-series or H-series engine needs to be before it has an IP like you describe (where its oil needs to be changed separately from the engine's oil). I've never seen anyone post an image of such an old Toyota IP pump here on ih8mud. Perhaps pre-1976?

 

[hedydd]

I was really answering the first few posts on this topic and see that what I have said is repeating some good advice and pictures in the posts around #30 and before. Just getting my coat..............

 

[eric2381]

I just did mine after reading this thread. A bit came out. Black as night.

Thanks for the heads up.

 

[rideglobally]

what about a 12ht

does 12ht have this drain plug? if it does i need to drain mine. thanks for posting this.

 

[Sprey]

does 12ht have this drain plug? if it does i need to drain mine. thanks for posting this.

x2 i had a slight look but im not sure so hoping some1 can provide an answer

 

[lostmarbles]

Bump

(I know nothing about 12HT engines. But somebody must have the answer. ...... For all I know, a 12HT may not even run an in-line pump.)

 

[Henry James the 47th]

The 12H-T runs an inline pump

 

[Alberta FJ]

My 1983 Datsun with a SD25 engine had this pump lubrication listed every oil change when I looked farther in to this it was requried to pull the plug and add 4ml of cod liver oil to pump diaphram. I assumed the 3b was the same I was looking as a friend and I were discussing this as he has afew 3b cruisers and I am preping to put one in my fj40.

 

[drfang]

Hi Vinny

Inline injection pumps like these are lubricated by the engine's pressurised lubrication system ..... So in that respect - the answer is "Yes".

But where they have a pneumatic governor, some oil leaks through the "rack seal" over time and accumulates on the pump-side of the leather diaphragm. And since engine oil damages leather, Toyota installed a drain plug there to enable this leaked-oil to be periodically drained.

Actually your question makes me recall a dilemna I had when I bought my cruiser back in 1981. .... The owners manual mistakenly lists "changing the IP oil" as part of periodic maintenance (and I am a stickler for proper maintenance). I recall going to the trouble of asking local Toyota mechanics how to accomplish this task ... But of course they just smiled and offered no help because assisting someone who does his own repairs/maintenance is/was "against their best interests". It actually took me quite some time to conclude that this item in the maintenance schedule was nonsense .

I've recently replaced the engine on my 1982 Daihatsu F55.
The replacement engine was running in the original vehicle but definitely hunting in idle. The result is of course the same is happening in the transplant. Now the truck I took this motor out of had been sitting without use for over ten years and my guess is that the leather diaphragm that governs the idle speed has dried out. I'm thinking of flooding the chamber this diaphragm sits in with neatsfoot oil rather than just dropping in 2 or 3 drops as the manual suggests in an effort to soften up a dry diaphragm. I can't see why this could be detrimental to the rest of the injector pump as ther is theoretically no direct communication from this chamber into the body of the pump itself. I'd welcome any comments on my theory and my intended method of fixing the high idling revs. The engine I transplanted was reconditioned about 1998 for which I have receipts etc. and the truck was used very little after that before being laid up.

 

[lostmarbles]

does 12ht have this drain plug? if it does i need to drain mine. thanks for posting this.

x2 i had a slight look but im not sure so hoping some1 can provide an answer

We are all always learning new stuff all the time.

Based on my current level of knowledge (which is higher than the level when I last posted in this thread) ... I'd say the 12HT engine is WITHOUT a leather diaphragm ..... just the same as the automatic-transmission vertsion of the 2H engine doesn't have a diaphragm.

Perhaps the 12HT is used only with automatic gearboxes on production models? Because my understanding is that all automatic gearboxes need mechanical governors instead of pneumatic ones.

My 1983 Datsun with a SD25 engine had this pump lubrication listed every oil change when I looked farther in to this it was requried to pull the plug and add 4ml of cod liver oil to pump diaphram. I assumed the 3b was the same I was looking as a friend and I were discussing this as he has afew 3b cruisers and I am preping to put one in my fj40.

Cod Liver Oil is not the same as Neatsfoot Oil and would be entirely wrong as far as I know.

I've recently replaced the engine on my 1982 Daihatsu F55.
The replacement engine was running in the original vehicle but definitely hunting in idle. The result is of course the same is happening in the transplant. Now the truck I took this motor out of had been sitting without use for over ten years and my guess is that the leather diaphragm that governs the idle speed has dried out. I'm thinking of flooding the chamber this diaphragm sits in with neatsfoot oil rather than just dropping in 2 or 3 drops as the manual suggests in an effort to soften up a dry diaphragm. I can't see why this could be detrimental to the rest of the injector pump as ther is theoretically no direct communication from this chamber into the body of the pump itself. I'd welcome any comments on my theory and my intended method of fixing the high idling revs. The engine I transplanted was reconditioned about 1998 for which I have receipts etc. and the truck was used very little after that before being laid up.

I don't think it's a good idea.

Neatsfoot Oil tends to dry into a glue-like substance if it is left exposed to the atmosphere in a pool somewhere.

 

[ticoman]

I had a B engine for 8 year and had to replace the diaphram twice in that timeopening up that housing,I never found any excess oil.It is quite common for that diaphram to give out any excess oil would drain when you opened the housing. There are lots of threads on that diaphram.

 

[magnus_heydoc]

This thread is interesting.
I pulled off my transfer pump and about 250 or more ml of oil came out. If this oil caused the lower third of the diaphragm to be sitting in oil instead of air it would be less movement via engine vacuum to influence the spring. You'd then have less fueling. So it seems if you have an old rig you might pull the transfer pump and drain 25+ years of accumulated oil. I've yet to put it back together but I expect a power increase.
aaron