Wanderlodge Owners Group  
BuyByeBlueBird.com
WOG Gear

Go Back   Wanderlodge Owners Group > Mechanic's Corner > Engine

Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

Site Search:
Reply
 
Thread Tools
  #1  
Old 07-10-2011
Albatross Albatross is offline
Junior Member
 
Join Date: Aug 2009
Location: Strasburg
Posts: 10
Default 8V92 Alternator Belts

My 1990 PT-40 has dual alternators. I have replaced the belts on the "primary" alternator under the bed with no problems. The "secondary" alternator on the rear of the engine under the A/C compressor was recently replaced with the 2 belts being replaced at the same time. Belts used were Gates 7425 (42.5" long 15/32wide). Took short 5 mile trip, both belts broke. It appears that the 7425 belts can't provide the horsepower required for the alternator. What belts should I be using? I can't locate a P/N in the BB Books. Thanks for your help!
__________________
Don Sutherland
1990 PT40 WBWL
Strasburg, VA
Reply With Quote
  #2  
Old 07-10-2011
WestySKPs's Avatar
WestySKPs WestySKPs is offline
Sandwichs de Glace
 
Join Date: Feb 2010
Location: Cincinnati
Posts: 739
Default

Hi Don,

Just checked: Both of our rear alternator belts are Gates 7425 XL's (pic attached). More than 5k miles on them with no problems.

MnM
Attached Thumbnails
Click image for larger version

Name:	Rear Alt Belt.JPG
Views:	261
Size:	300.6 KB
ID:	11207  
__________________
Mike and Mary Sprinkel
Cincinnati, OH
1990 WLWB - "The TARDIS"
2008 Subaru Outback 2.5XT
Reply With Quote
  #3  
Old 07-10-2011
gcyeaw's Avatar
gcyeaw gcyeaw is offline
Gardner
 
Join Date: Dec 2007
Location: Ridgewood
Posts: 8,461
Default

It takes an awful lot to snap even a less than top quality belt. Something else must be wrong for that to happen. The alternator load is very unlikely the culprit.
__________________
Gardner Yeaw
86 PT-36 Golden Memories
83FC35 SB $IXTEEN TON$ SOLD
78 FC 33 Happinest (Sold)
Ridgewood, New Jersey
Reply With Quote
  #4  
Old 07-11-2011
Randy Dupree's Avatar
Randy Dupree Randy Dupree is offline
Forum owner
 
Join Date: Dec 2007
Location: Archer,Fl
Posts: 32,647
Default

I agree,the problem is not the belts,that poor alternator is down there sucking up all the water and dirt and dust.
I would suspect your alternator is having problems,or,the belts were installed wrong.

A few years ago i put a new alternator on a 1990wb (same under the coach alternator),new belts too.
As the coach was driving away i saw a lone belt fall out from under the coach,I stopped the owner and we put 2 more belts on it at my expense.
I never did figure out what I did wrong,but its a bad place to be working and its hard to see what your doing.
__________________
DO NOT SEND PM
email me at randy@randydupree.com only.

Randy Dupree
2000 LXI 43
Bainbridge,Ga.
Archer Fl.
www.buybyebluebird.com

randy@randydupree.com
Reply With Quote
  #5  
Old 07-11-2011
Albatross Albatross is offline
Junior Member
 
Join Date: Aug 2009
Location: Strasburg
Posts: 10
Default 8V92 Alternator Belts

Thanks for all the information. Possibly the belts were from old stock as the breaks were clean. There are no abrasions on the belts and alignment looks good. Alternator is new, not rebuilt and spins freely. Yes Randy I agree! Its a miserable job to replace this alternator done mostly by feel! I'll replace the belts again and pay particular attention to belt tension.
__________________
Don Sutherland
1990 PT40 WBWL
Strasburg, VA
Reply With Quote
  #6  
Old 07-12-2011
iamflagman's Avatar
iamflagman iamflagman is offline
(1943-2018) Forum Co-founder/Administrator
 
Join Date: Dec 2007
Location: Hopkins
Posts: 11,506
Default

Quote:
Originally Posted by Albatross View Post
Thanks for all the information. Possibly the belts were from old stock as the breaks were clean. There are no abrasions on the belts and alignment looks good. Alternator is new, not rebuilt and spins freely. Yes Randy I agree! Its a miserable job to replace this alternator done mostly by feel! I'll replace the belts again and pay particular attention to belt tension.
Don,

To make sure that you get the proper tension on those belts my advice is to purchase a KRIKET V-BELT TENSION TOOL pdf

Wanderlodge Owners Group > Mechanic's Corner > Tool Tips > KRIKET V-BELT TENSION TOOL
__________________

JOHN FINN
FORUM MODERATOR-ADMINISTRATOR
1982 FC35RB
I'm NO EXPERT, but I did stay in the FINN'S INN EXPRESS last night
HOPKINS, SOUTH CAROLINA
VISIT THE FINN'S INN EXPRESS REMODELING ADVENTURE AND TECH. TIPS
I'M SO SLOW ON THE HILLS,THAT I GET TO SMELL THE FLOWERS AS I GO BY.....AND WATCH THEM GROW TOO!! NOT SO MUCH ANYMORE
Visit the WILD HARE RACING website
REMEMBER 9/11
Reply With Quote
  #7  
Old 10-08-2011
matthewmccaskey's Avatar
matthewmccaskey matthewmccaskey is offline
Senior Member
 
Join Date: Sep 2011
Location: Waynesboro
Posts: 192
Default 8v92 Alternator Belts

Does any one have the Gates Belt numbers for the Alternator on the Back of the Engine??? I have been searching the post and found two numbers, 7290 and 7425XL and both of those did not work..

2nd Question, Where would be the best place to purchase the plastic tubing that goes on the Front of the Engine Alternator? its like a dryer vent tube but smaller and goes back towards the Transmission..
__________________
Matthew McCaskey
Waynesboro, MS
1993 PT40 Hummin Bird
Les Collets Rouge
Reply With Quote
Reply

Bookmarks

Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
8V92 Air Conditioning Belts brcn Engine 4 04-05-2016 02:22 PM
tighten alternator belts from the outside of engine bay? DW SD PT & WB (Twin Axle Pusher Unique Issues) 11 09-11-2010 12:42 PM
Front Alternator 8V92 Steve Quandt Electrical 1 10-12-2009 09:36 PM
Changing the belts on the alternator on a 8v92 Detroit iamflagman Engine 0 07-14-2008 02:19 AM

Web Search:

All times are GMT -4. The time now is 03:16 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.