sheave

denny3223 · 03-08-2011, 01:20 PM

i have yamaha gas cart, i think a 1996. Its making noise around the clutch sheave. I can squeeze the inner and outer sheave together. Machine still runs. what could be the problem? thanks. DONT KNOW MUCH ABOUT CARTS

Mike Mac · 03-09-2011, 12:24 AM

Start by taking the front (primary) clutch cover off, to inspect the weights. Look to see if one or more might be out of place or broken and need to be replaced. If they all look OK, pump 1 pump of grease into the zirk fitting on the edge of the primary clutch and pump 1 pump of grease into the secondary clutch sheave (inside sheave, between the tranny and the sheave).

If this works, then you need to search "cleaning primary clutch" using the search feature.

Much discussion on this subject here.

sho305 · 03-09-2011, 08:05 PM

Good idea. It could be dry and dirty, or there could be some broken parts in there.

smallblock450sl · 03-09-2011, 08:17 PM

Are you asking about the primary clutch(engine clutch) or the secondary clutch (transaxle clutch)? If you have a 1996 it should be a G16 and the primary would have a cover cap with 3 10mm head bolts that hold it on. They are a 3 weight and roller clutch and the most problems are flat spots on the rollers, causing it to "stick" in the "closed position". The secondary has a floating/moving flange that the "bushing" can wear out if not greased. If you can take a picture or video and let us know. We all want to help if we can. Good luck.

denny3223 · 03-09-2011, 09:22 PM

it is a g16a. After reading info in this forum, i believe it sounds like the weights in the primary clutch. Do they sale kits, and advice on how to change them. Thanx alot. Big help.

Mike Mac · 03-09-2011, 09:47 PM

Denny, yes they do, but take Smallblocks lead on this. He's the Guru, and will know whats wrong before you do!

denny3223 · 03-09-2011, 10:06 PM

thanx, ill wait so i get t right. Wondering if i should replace anything else when im in there.

Mike Mac · 03-09-2011, 10:46 PM

If the weights look good and move smoothly when you slide the clutch in and out by hand, I would next look at weather the sliding sheave has to much play, meaning the bushing in the center of the sheave is worn out.

I've never seen a bad one, so I don't really know what or how they act.

Somewhere, not to many pages back, there are some video's of properly articulating clutches. Just scan the pages or use the search feature at top of the page.

PS, it is important that both clutches get a pump or 2 of grease, that lubricates the shafts that the sheaves slide on. When they are dry they wear out and make noise.

denny3223 · 03-11-2011, 10:16 AM

I removed the primary clutch cover and inspected the internal parts. Nothing looks broke or out of place and is very clean. I placed the cart in neutral and started the cart. Very noisy. I removed the belt and started the cart. Noise went away, so therefore my hypothesis is that the bushing in the rear (secondary clutch) must be bad. I am a newbee, but is this a logical guess?

sho305 · 03-11-2011, 11:19 AM

You mean mine?

YouTube - Yamaha golf cart G9 clutches

Noise is often the primary, but maybe not. In the rear it can also be a trans issue. You should be able to see the secondary (on trans) wobble if the bushing is out or move the sheave by hand. The inner sheave has the bushing the outer sheave should be solid on the shaft. Make sure the nut is not loose on it.

03-08-2011, 01:20 PM	#1
denny3223 Not Yet Wild Join Date: Mar 2011 Posts: 6	sheave i have yamaha gas cart, i think a 1996. Its making noise around the clutch sheave. I can squeeze the inner and outer sheave together. Machine still runs. what could be the problem? thanks. DONT KNOW MUCH ABOUT CARTS
denny3223 Not Yet Wild Join Date: Mar 2011 Posts: 6

03-09-2011, 12:24 AM	#2
Mike Mac G8 Specialist Join Date: Jun 2009 Location: Phoenix Posts: 7,799	Re: sheave Start by taking the front (primary) clutch cover off, to inspect the weights. Look to see if one or more might be out of place or broken and need to be replaced. If they all look OK, pump 1 pump of grease into the zirk fitting on the edge of the primary clutch and pump 1 pump of grease into the secondary clutch sheave (inside sheave, between the tranny and the sheave). If this works, then you need to search "cleaning primary clutch" using the search feature. Much discussion on this subject here.

03-09-2011, 08:05 PM	#3
sho305 Vegas modded 420 Join Date: Jun 2009 Location: West MI Posts: 15,445	Re: sheave Good idea. It could be dry and dirty, or there could be some broken parts in there.

03-09-2011, 08:17 PM	#4
smallblock450sl Sometime's............ Join Date: Oct 2007 Location: Tacoma Washington Posts: 11,875	Re: sheave Are you asking about the primary clutch(engine clutch) or the secondary clutch (transaxle clutch)? If you have a 1996 it should be a G16 and the primary would have a cover cap with 3 10mm head bolts that hold it on. They are a 3 weight and roller clutch and the most problems are flat spots on the rollers, causing it to "stick" in the "closed position". The secondary has a floating/moving flange that the "bushing" can wear out if not greased. If you can take a picture or video and let us know. We all want to help if we can. Good luck.

03-09-2011, 09:22 PM	#5
denny3223 Not Yet Wild Join Date: Mar 2011 Posts: 6	Re: sheave it is a g16a. After reading info in this forum, i believe it sounds like the weights in the primary clutch. Do they sale kits, and advice on how to change them. Thanx alot. Big help.
denny3223 Not Yet Wild Join Date: Mar 2011 Posts: 6

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03-09-2011, 09:47 PM	#6
Mike Mac G8 Specialist Join Date: Jun 2009 Location: Phoenix Posts: 7,799	Re: sheave Denny, yes they do, but take Smallblocks lead on this. He's the Guru, and will know whats wrong before you do!

03-09-2011, 10:06 PM	#7
denny3223 Not Yet Wild Join Date: Mar 2011 Posts: 6	Re: sheave thanx, ill wait so i get t right. Wondering if i should replace anything else when im in there.
denny3223 Not Yet Wild Join Date: Mar 2011 Posts: 6

03-09-2011, 10:46 PM	#8
Mike Mac G8 Specialist Join Date: Jun 2009 Location: Phoenix Posts: 7,799	Re: sheave If the weights look good and move smoothly when you slide the clutch in and out by hand, I would next look at weather the sliding sheave has to much play, meaning the bushing in the center of the sheave is worn out. I've never seen a bad one, so I don't really know what or how they act. Somewhere, not to many pages back, there are some video's of properly articulating clutches. Just scan the pages or use the search feature at top of the page. PS, it is important that both clutches get a pump or 2 of grease, that lubricates the shafts that the sheaves slide on. When they are dry they wear out and make noise.

03-11-2011, 10:16 AM	#9
denny3223 Not Yet Wild Join Date: Mar 2011 Posts: 6	Re: sheave I removed the primary clutch cover and inspected the internal parts. Nothing looks broke or out of place and is very clean. I placed the cart in neutral and started the cart. Very noisy. I removed the belt and started the cart. Noise went away, so therefore my hypothesis is that the bushing in the rear (secondary clutch) must be bad. I am a newbee, but is this a logical guess?
denny3223 Not Yet Wild Join Date: Mar 2011 Posts: 6

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