cog belt vs. smooth belt HJ61 landcruiser

Submitted: Tuesday, May 31, 2005 at 20:05

ThreadID: 23464 Views:3843 Replies:7 FollowUps:1

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figtree

We are leaving for Kimberley next week and are buying spare parts for grey import HJ61. My mechanic sold me a kit containing water hoses and 3 belts, saying they will definitely fit my vehicle.... when I came home, I realized there were 1 long smooth belt (Dayco 13A1400) and two cog belts (Dayco 15A1105 and 15A0890) included. Now, looking under the bonnet, there are only smooth belts in the truck: Mitsubishi MPMF-6540, REMF-8420 and REMF-8340. It doesn't look like cogs on these belts are worn away...

I am confused: I would not have expected the cog belts would work well on smooth pulleys-do they? Did I get the right kit?

Thank you,

Joseph

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Reply By: Member - Phil G (SA) - Tuesday, May 31, 2005 at 20:39

Tuesday, May 31, 2005 at 20:39

No problems with the cog belts.

But I had problems with getting aftermarket belts to fit the HJ61 properly. Just fit them to the vehicle (do the same with the hoses) and keep the old ones as spares. Then you'll know you have spares that fit, and you're highly unlikely to need them.

AnswerID: 113796

Reply By: Rosco - Bris. - Tuesday, May 31, 2005 at 21:32

Tuesday, May 31, 2005 at 21:32

Joseph

Not sure about your vehicle, but I was always under the impression Vee belts worked on the principle of side wall friction rather than on the bottom of the belt.

In that event, as long as they are the correct length, I would expect you'll not have problems.

Cheers and enjoy the trip

AnswerID: 113810

Reply By: Kiwi Ray - Tuesday, May 31, 2005 at 21:47

Tuesday, May 31, 2005 at 21:47

Hi Joseph
My experience is that they do not slip as readilly when wet other than that I do not have a problem with cog belts
ray

AnswerID: 113816

Reply By: figtree - Tuesday, May 31, 2005 at 21:55

Tuesday, May 31, 2005 at 21:55

thank you for the replies. In the meantime, I came asscross a web-site that says the cogs are there to promote the cooling of the belt and improve flexibility. I wasn't aware of this design earlier-all my previous cars had smooth v-belts. ANd, yes, the power is transfered through the sides of the belts.

Joseph

AnswerID: 113818

Follow Up By: Steve West - Wednesday, Jun 01, 2005 at 00:13

Wednesday, Jun 01, 2005 at 00:13

Hi Figtree , I think you may find that the cogged type belts will only be of advantage on small pullies as the missing coggs if you wish allow the belt to go around a tighter circumference.The standard V belt would probably last longer on normal pullies as the layers of webbing etc are from inside to out side where as with the cogged belts only have a thin back bone. I think you will find most belts on vehicles only run around, at a guess somewhere around about one third of the pully 90 degrees which dose not require a flexible belt as in some engineering applications or where the belt only runs from one pully to another completeing a full 180 degrees on small pullies.
Hope you all can understand what I'm trying to explain if you do can you explain it back to me so i can understand to thanks
Steve West.

FollowupID: 369909

Reply By: Member - Davoe (Widgiemooltha) - Tuesday, May 31, 2005 at 22:06

Tuesday, May 31, 2005 at 22:06

FIT THEM BEFORE YOU GO !! I recently got belts for my camper and none of them fitted, Their were changes made to configurations and being a grey import you really should fit them and keep the old ones for spares

AnswerID: 113821

Reply By: Footloose - Wednesday, Jun 01, 2005 at 09:28

Wednesday, Jun 01, 2005 at 09:28

Agree strongly with other posters. Fit the new ones before you go, and make sure they're right.
Years ago I had a specialist fit new belts to my HJ60. By the time I was in the Kimberly the new belts were useless, wrong length, and no air con at 100K/h. I could drive at 80 with air con but at 100 the engine was getting rather warm. (You dont get anywhere at 80k up there) Had another belt fitted at Headland, great service, and it cost me LESS than my "specialist" at home.
Buyer beware.

AnswerID: 113867