Perkins 4.154 Crank Pulley removal - Page 2 - SailNet Community
Reply
 
LinkBack Thread Tools
post #11 of 15 Old 01-25-2012
Senior Cruiser
 
sea_hunter's Avatar
 
Join Date: Jul 2000
Posts: 512
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 15
 
Quote:
Originally Posted by SloopJonB View Post
Indeed I don't (it IS a brute though). I've never seen a serpentine system without a powerful spring loaded tensioner - the one on my wife's minivan requires a breaker bar to unload the tension. How is tension maintained on the belt on the system you describe?
Yes automotive serpentine belts require a loaded tensioner, the ones used on marine engines employing large case alternators do not. The belt goes around ALL the drive pulleys, but underneath the idler pulley. The tension is loaded with the alternator adjusting arm. The main reason it's done this way is that marine diesel engines don't operate at variable and higher engine RPMs (therefore no backlash that causes the belt to "jump") like automotive engines. Hope that helps.
sea_hunter is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 15 Old 01-25-2012
Senior Moment Member
 
SloopJonB's Avatar
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 11,361
Thanks: 59
Thanked 67 Times in 64 Posts
Rep Power: 5
 
Quote:
Originally Posted by sea_hunter View Post
Yes automotive serpentine belts require a loaded tensioner, the ones used on marine engines employing large case alternators do not. The belt goes around ALL the drive pulleys, but underneath the idler pulley. The tension is loaded with the alternator adjusting arm. The main reason it's done this way is that marine diesel engines don't operate at variable and higher engine RPMs (therefore no backlash that causes the belt to "jump") like automotive engines. Hope that helps.
Thanks - good to know.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
SloopJonB is offline  
Quote Quick Reply Share with Facebook
post #13 of 15 Old 01-28-2012 Thread Starter
Junior Member
 
Join Date: Jan 2012
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
I have been stuck in this project because I decided to proactively replace the water pump since I had the front of the engine mostly apart.

Perkins had TWO versions of the 4.154. One they made and one that Mazda made under license. My engine number is A07_J13352U. The J means Japan and that means Mazda.

A good engine was made by Mazda I was told. But it is NOT the usual North American version with North American Accessories. The manual posted earlier in this link has the INCORRECT water pump part number listed as U5NW0053 (hand written) corrected to U5MW0053 (still not correct for a Japan engine). The good part number is 136315100A (Mazda) I have seen this NA version manual, with the hand written pump number, posted all over the web

I removed the entire water pump casting and took my manuals (also North American) to the Perkins dealer. One of them spotted the J in the engine number and said, "you have the Mazda version!"

A day later I had the perfect drop in pump unit !!
(learned more about Perkins than I wanted to, but now I know I have the Japanese version.)

Now on the the alternator project...
TYLERWCOM is offline  
Quote Quick Reply Share with Facebook
post #14 of 15 Old 01-28-2012
Senior Cruiser
 
sea_hunter's Avatar
 
Join Date: Jul 2000
Posts: 512
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 15
 
Yeah, that's an oddball for sure. I know the license built Perkins 4.154, it was imported into Canada in the Mazda B trucks and the Ford Ranger in the mid 80's. It's pretty much the same engine but with Mazda specific externals. What heat exchanger does it use? Just for future reference, ALL the Perkins part number beginning with USN or USM, are invalid. Since Cat bought Perkins, all part numbers have numerical references.
sea_hunter is offline  
Quote Quick Reply Share with Facebook
post #15 of 15 Old 01-28-2012
Senior Member
 
Join Date: Feb 2008
Location: N. VA
Posts: 656
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 8
 
Send a message via Yahoo to dacap06
I'm sorry to have misled you with the manuals. It wasn't intentional. Looks like we have ALL learned something!

T. P. Donnelly
S/V Tranquility Base
1984 Islander 30 Bahama
Pasadena, MD
dacap06 is offline  
Quote Quick Reply Share with Facebook
Reply

Tags
alternator , belt , perkins , pulley

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Pulley wheel ambianceack Gear & Maintenance 8 03-22-2010 05:18 PM
Perkins 4-154 crank pulley alignment Stillraining Gear & Maintenance 26 09-11-2008 07:08 AM
Yanmar PTO v-pulley gramcko Gear & Maintenance 3 01-16-2008 01:18 PM
It's a Sheave, not a Pulley sailaway21 Gear & Maintenance 35 12-13-2007 12:52 PM
Perkins 107 starter removal bsfree Gear & Maintenance 4 07-07-2007 05:04 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome