[9500my89]

Our 7720 started making noise on the cyl. drive at idle speed. When you go full throttle it goes away. The electric hdr. drive clutch also wants to creep alittle when itis shut off. Can't find any bad bearings or anything that would cause this. Yesterday late the v.s. belt for the cyl. drive broke. I'm wondering if it was bad causing the vib. or it broke because of some other problem. Any suggestions ?? Thanks,Paul

 

[gmsmith]

Look closer at the drive. Sounds like a bearing. Did you feel a vibration in it?

 

[gmsmith]

Was the belt in good shapre before it broke? A bad belt with a light load "idle" will make some noise.

 

[9500my89]

Hey we put the new v.s. belt on yesterday and she is smooth as silk I had checked that belt the day before and it looked ok. I think maybe it was broken cords inside the belt ; kind of like a tire with broken belts??

 

[davedan]

OEM belt or other? I had a problem with goodyear combine belts breaking alot years back on a massey, never again, now always gates or OEM

 

[9500my89]

OEM belt from JD. The replacement belt we put on is from A&I not sure who makes theirs.

 

[silverdollar]

ontgreen

Make sure to grease the gear case of the lower sheave on that v.s. drive belt . There is a proper pocedure that is not well covered in the owners manual. Don't just put grease in the outer zerk. If the cams inside wear or the spring becomes weak, you will start to tear up that same belt quicker than you'll like.

 

[9500my89]

Thanks SD we will be sure to keep that lubed.