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Author Topic: Oil Pressure  (Read 1532 times)

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ultrafxr

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Re: Oil Pressure
« Reply #45 on: March 19, 2017, 12:41:31 PM »

IF Harley offers a kit to make the Boom system work like previous models and give actual pressure readings, the kit will have to include a new sending unit.  There are two different types of parts involved, one is just a simple switch that turns the light off once a preset pressure is reached, while the other is more expensive and combines the switch function with actual pressure readings.  If the current M8 engine oil pressure switch is anything like the earlier ones, the preset pressure is so low that basically any pressure at all will turn off the light (I seem to remember checking one a few years back that turned off at approximately 2 psi for instance, I've heard of others that turned off at 1 psi).  Idiot lights are good for telling you about a failure that needs immediate reaction, but not much else.

2016 and previous model years:
P/N 74438-99A  Oil Pressure Sender   $35.47
2017 M8 models:
P/N 71400112  Oil Pressure Switch   $12.63

Jerry
Good info.  So I guess the 'OK' indication of oil pressure on the BB screen just means ' it's not low enough to trigger the low oil pressure warning light.'  So to the moco in the words of the old Ernest Tubb hit song - 'thanks, thanks a lot.'
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muddypaws

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Re: Oil Pressure
« Reply #46 on: March 21, 2017, 05:22:36 PM »

Today the dealer sent me an oil pressure switch and the problem is fixed. Not sure how the oil pump could be bad and then the switch unless the mechanic damaged it taking it out to check pressure.
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Bill

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Re: Oil Pressure
« Reply #47 on: March 21, 2017, 09:09:12 PM »

Glad things worked out.  :bananarock:
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smkymtnboy

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Re: Oil Pressure
« Reply #48 on: March 21, 2017, 09:25:13 PM »

wow! sounds like the dealership took the long way around. but,they did get you fixed up. give em credit for that! good luck from here on. :2vrolijk_21:
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muddypaws

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Re: Oil Pressure
« Reply #49 on: Yesterday at 07:26:01 AM »

I do think the initial problem was the sending unit but they did check the pump and said is was producing low pressure thne it should So I guess I'm glad I got the new updated pump.
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Bill

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Re: Oil Pressure
« Reply #50 on: Yesterday at 11:17:12 AM »

It's nice when a lack of dealer competence works in your favor.  Likely had nothing other than a bad sending unit all along.  Got an upgraded oil pump because of it.   Nice  ;D .
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muddypaws

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Re: Oil Pressure
« Reply #51 on: Yesterday at 11:21:01 AM »

Does anyone know if the new oil pump has a new part number?
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Bill

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Re: Oil Pressure
« Reply #52 on: Yesterday at 12:00:57 PM »

Does anyone know if the new oil pump has a new part number?

The old part numbering system was obvious, with the letters added to the end of the original part number to signify an updated part.  An example would be part number 54373-99C, meaning it was the third update to the original 54373-99.  As best I can tell the new part number system doesn't have an obvious indicator.

The part number in the online parts catalog for the oil pump for your bike is 62400124.  What part number does your copy of the work order show they used?

Jerry
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muddypaws

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Re: Oil Pressure
« Reply #53 on: Yesterday at 12:04:26 PM »

I'll look when I get home and post.
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Bill

muddypaws

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Re: Oil Pressure
« Reply #54 on: Yesterday at 02:19:40 PM »

I called two other dealers and was told there is an updated oil pump. I could not get out of either one if it's a pump redesign or was it just a vendor screw up during pump production.
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Bill

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Re: Oil Pressure
« Reply #55 on: Today at 10:31:45 AM »

I called two other dealers and was told there is an updated oil pump. I could not get out of either one if it's a pump redesign or was it just a vendor screw up during pump production.

The statement "updated oil pump" implies a new part number.  A vendor manufacturing issue would not require a new part number, just a more capable vendor.  An engineering design change would require a new part number....
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muddypaws

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Re: Oil Pressure
« Reply #56 on: Today at 10:34:46 AM »

It's the same part number but several dealers told me it's a replacement. All I really care is that it works.....
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Bill

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Re: Oil Pressure
« Reply #57 on: Today at 11:30:52 AM »

The statement "updated oil pump" implies a new part number.  A vendor manufacturing issue would not require a new part number, just a more capable vendor.  An engineering design change would require a new part number....

No change for even a manufacturing correction is still both lazy and a concern though.  With that there is no way to distinguish good "new" inventory from the old original parts.  Never seen that done when it wasn't a CYA move from someone not wanting the attention.
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