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Old 06-13-2013, 05:19 PM
Floridalandcare Floridalandcare is offline
LawnSite Senior Member
Join Date: Aug 2002
Location: Tampa
Posts: 312
72inch Lazer Z Hydro Pump and Belts getting real hot .

Got a Lz31dg724 Serial 291303..
The mower is old with 2500hrs ,The problem is it keeps wearing the hydro-pump belts out . I put a new one on today and cut maybe 2 acres and it shreaded it ,went through 2 more belts with the same results . The first belt was an Exmark belt the last 2 were from Discount Auto. Also i should note that the pump pulleys spin freely by hand and the idler is all lined up. Every time the belt shreads the pumps are extremely hot . I believe it has a hydro oil cooler that runs through the radiator but not sure. Right now Im draining the hydro oil and filter and gonna see if that helps ... anyone have any other ideas

P.S With a new belt on it -it runs great no abnormal noises or smell but after about 20 minutes I can feel it slip alittle then dead in the water.
United States Marine Corps 1833mos . The only easy day was yesterday..Semperfi .
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Old 06-13-2013, 07:27 PM
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piston slapper piston slapper is offline
LawnSite Platinum Member
Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,236
A few things to check....
Make sure you have the right belt....5 rib pulleys or 8 rib pulleys...
Make sure the pulley grooves are clean and the high points of the grooves are not sharp as a razor..
Make sure the idler arm isn't sticking..causing a loose belt ...and superheating the pump pulleys...
If You Have All The Answers...Except The One You Need...You're Not Trying Hard Enough...
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Old 06-14-2013, 12:03 AM
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Stonewellmark Stonewellmark is offline
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Join Date: Feb 2009
Location: Hudson Valley, N.Y.
Posts: 48
Check the tensioner pulley bearing, is it spinning freely and quietly?
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Old 06-14-2013, 04:59 PM
Exmark PR Exmark PR is offline
Join Date: May 2009
Location: Beatrice, Nebraska
Posts: 238
Try checking the belt for proper tension by checking idler arm bearings, springs, and spring anchors. It sounds like the belt is slipping, getting hot, and breaking. You also qualify for a free ROPS. Please call our Customer Service team 800.667.5296 and they can set this up for you.
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