Rubber 8J Lovejoy coupling always cracking on steam-brite hornet truck mount | TruckMount Forums #1 Carpet Cleaning Forums

Rubber 8J Lovejoy coupling always cracking on steam-brite hornet truck mount

XtremeSteamNJ

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Jun 17, 2019
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Mike Gerace
Hi all,

I have an older steam-brite hornet truck mount (approximately 8-9 years old). The machine still kicks butt and works great! The biggest issue I have with it is the rubber 8J lovejoy coupling that connects the engine and blower shafts. I seem to have to replace it 2-3 times a year (sometimes more). Now I know that the alignment is crucial in order to have the least vibration/wobble on the coupling itself to prevent it from cracking or breaking. The bigger issue is that the motors do not self align (left to right) so I have been using a square to make sure they align perfectly and then tighten the bolts on the blower motor housing onto the frame. I would like to know if there are alternatives to those rubber couplings. Do they make a stronger/self aligning assembly that last a lot longer? Any ideas would be greatly appreciated!

Thank you in advance,
Mike
 

Kevin Dumas

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Aug 31, 2008
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Kevin Dumas
Try one of the 2 piece sleeves with the holding ring before you change anything out.
I think they take way more torque that the 1 piece sleeves.

And to prolong coupler life:
ALWAYS bring your machine up to operating rpm BEFORE hooking up the vacuum line.
ALWAYS remove your vacuum line BEFORE throttling down your engine.
 

XtremeSteamNJ

New Member
Jun 17, 2019
6
0
1
Real Name
Mike Gerace
Try one of the 2 piece sleeves with the holding ring before you change anything out.
I think they take way more torque that the 1 piece sleeves.

And to prolong coupler life:
ALWAYS bring your machine up to operating rpm BEFORE hooking up the vacuum line.
ALWAYS remove your vacuum line BEFORE throttling down your engine.
Hi Kevin. Thanks! Where would I get a 2 piece sleeve and would it still be an 8J size?

Thanks,
Mike
 

Jim Davisson

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Aug 23, 2016
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I would recommend pulling off both metal flanges or loosing them and sliding the back and checking the vertical alignment of the 2 shafts with a straight edge. Horizontal misalignment chews at the teeth points, cracking has me leaning towards vertical misalignment.