Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 02-05-2012, 16:16   #1
Registered User
 
Dynamo1181's Avatar

Join Date: Jun 2010
Location: Bahamas - Maine
Boat: '88 Passport 41' Magic Moments
Posts: 197
Perkins 4-108 Oil Pressure Sender Specs

Can someone give me the specs for the 4108 oil sender? I replaced the bad unit with an 80 psi Teleflex model and now get a full scale reading. I suspect I can put a 40 resistor in line and get the reading to the 50psi range but would like to know what the perkins part specs might be. I did purchse a generic sender from Napa but the unit didnt last long under diesel vibration. Any help appreciated to include a supplier of the OEM unit.
Thx
A
__________________

__________________
.............< Alan >..............
><((((> .`.><((((>
........AD4HE & KD4LGZ........
Dynamo1181 is offline   Reply With Quote
Old 02-05-2012, 17:05   #2
Registered User
 
cburger's Avatar

Join Date: May 2006
Location: Nyack, NY
Boat: Westsail 32
Posts: 1,547
Images: 1
Re: Perkins 4-108 Oil Pressure Sender Specs

I will try and get the model number for you this weekend.
__________________

__________________
"All men are created equal, some are just more equal than others"
cburger is offline   Reply With Quote
Old 02-05-2012, 21:30   #3
Eternal Member
 
Chief Engineer's Avatar

Join Date: Aug 2006
Location: North of Baltimore
Boat: Ericson 27 & 18' Herrmann Catboat
Posts: 3,798
Re: Perkins 4-108 Oil Pressure Sender Specs

What make of gauge do you have?
__________________
Chief Engineer is offline   Reply With Quote
Old 02-05-2012, 22:03   #4
Registered User

Join Date: Nov 2011
Location: Montegut LA.
Boat: Now we need to get her to Louisiana !! she's ours
Posts: 3,421
Re: Perkins 4-108 Oil Pressure Sender Specs

Remote mount a standard 80lb oil pressure gauge, and use a flexable high pressure hose to the oil passage used for the gauge sender. easy and cheaper then a stock gauge ! Just a thought.
__________________
Bob and Connie
bobconnie is offline   Reply With Quote
Old 03-05-2012, 06:33   #5
Registered User
 
Dynamo1181's Avatar

Join Date: Jun 2010
Location: Bahamas - Maine
Boat: '88 Passport 41' Magic Moments
Posts: 197
Re: Perkins 4-108 Oil Pressure Sender Specs

I am running the standard Perkins panel which is Teliflex. The Teleflex sender that I put in is spec'ed at 33-240 Ohms. I know via manual gauge that the pressure should be at 40+-. The new set up reads full scale 80psi at start-up. I am guess that the Perkins sender should be somewhere in the park od 70-280 ohms. If I could get someone to measure the resistence between the stud and ground at off to confirm what, I can add the resistence. But I would like to know the std resistence range of the perkins part and if that stock sender is a 120psi for my 80 psi gauge.
thx
A
PS: Thx CB...How is the shaft seal holding on the injection pump?
__________________
.............< Alan >..............
><((((> .`.><((((>
........AD4HE & KD4LGZ........
Dynamo1181 is offline   Reply With Quote
Old 01-07-2014, 16:45   #6
Registered User

Join Date: Sep 2013
Posts: 12
Re: Perkins 4-108 Oil Pressure Sender Specs

I have a similar but different problem. I have a 100 psi gauge on my 4.107. The gauge started reading 25psi so I replaced the sender with a Sierra Marine 100psi sender. Same problem. Both senders measure 260 ohms out of circuit. I have not yet fired the engine up to see whether the new sender changes with an increase in oil pressure.

Ray Russell
40V163
Enshalla
__________________
v40163 is offline   Reply With Quote
Old 25-07-2014, 15:25   #7
Registered User

Join Date: Sep 2013
Posts: 12
Re: Perkins 4-108 Oil Pressure Sender Specs

I can tell you that the original oil pressure sender and the replacement (a Sierra Marine part) both measure 260 ohms when not installed on the engine.

I purchased a Home Depot 0-100psi mechanical gauge (from the well pump department) and an 1/8NPT nipple and coupler, and temporarily installed that to make absolutely certain that the problem was not with the engine itself. When I started the engine the gauge gyrated wildly around 50psi as a result of it not being fluid damped. But that was okay. It told me what I needed to know.

So I reinstalled my new sender and fired the engine up again. The gauge reads 75psi (remember the gauge reads 25psi when the engine is off and the ignition is on). So it has to be something with the gauge itself.

Next worry...

Ray Russell
Valiant 40 #163
Enshalla
__________________

__________________
v40163 is offline   Reply With Quote
Reply

Tags
perkins

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 06:37.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.