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post #1 of 6 Old 05-07-2019, 12:00 AM Thread Starter
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LT-155 mower won't back up

I'm working on my neighbor's LT-155. He owns a high-end horse arena and training farm. The mower is used to cut down pasture and gets worked pretty hard. The mow deck is cranked up to just below where it locks in the up position.

I also own an LT-155, but it's hard to use it as a baseline when I'm not sure what to look for. Need help from the collective to diagnose the issue.

When I try to back up with WOT it makes a 'weird' noise and won't back up a slight incline. It barely moves backward on level ground, but has fairly good go in forward. I've got the mow deck off and don't know how to check the belt tautness or tensioner function when it's not moving.

The belt doesn't appear really worn. It's not glazed, but have no idea how to test if it's slipping.
The rear hydrostatic appears to have some weeping as it's stained on one side. Not sure where it's coming from, but appears to be from the top coming down.
The fan is in tact with no broken fins.

How do I isolate whether it's the belt or rear drive? Is there some test for either case?

Stephen

80 JD-400: backhoe - Front loader - 54" blade - 42" rototiller
89 JD-318: 54" blade - 42" mow deck - 30" rototiller
99 LT-166: V-twin - 42" Freedom mulch deck
00 LT-155: 42" Freedom mulch deck (now a cart tug)
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post #2 of 6 Old 05-07-2019, 08:18 AM
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Re: LT-155 mower won't back up

Why would be belt slip in reverse and not forward ?

I think that one of the idlers might have a slotted mounting hole allowing you to alter the belt tension.

I think you have an internal problem with the trans.

Why is someone with lots of money wasting time on a worn out, inadequate mower ?
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post #3 of 6 Old 05-07-2019, 09:59 AM
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Re: LT-155 mower won't back up

Quote:
Originally Posted by rayjay View Post
Why is someone with lots of money wasting time on a worn out, inadequate mower ?
My first thought as well.



Andreas


2003 John Deere x595
54c deck / 54 Quick Hitch blade / hydraulic MCS / CTC loader / Warn XT30 winch / joystick conversion / QHDL / rear hydraulics
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post #4 of 6 Old 05-07-2019, 12:40 PM Thread Starter
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Re: LT-155 mower won't back up

HA! How do you think they GOT lots of money!
They would rather not use a new mower in the pasture if an old one gets the job done - and I agree. They want a beater in the fields and have a nice mower for the landscaped grass areas - which makes a lot of sense. It's not so much the money as the job it's doing. They buy used for the pastures. They don't want to throw it away if it's a simple problem. If the rear trans is kaput - they're not going to waste money on it.

I've had other belt driven machines where the drive doesn't work as well in reverse. It's the way the pulleys are set up for directional input. They're not as efficient going backwards. I just wanted to know if someone has dealt with this issue and can shortcut the diagnosis.

I'll look at the tensioners this morning and see if they can make it a bit tighter. If the condition persists - it's the trans.

Stephen

80 JD-400: backhoe - Front loader - 54" blade - 42" rototiller
89 JD-318: 54" blade - 42" mow deck - 30" rototiller
99 LT-166: V-twin - 42" Freedom mulch deck
00 LT-155: 42" Freedom mulch deck (now a cart tug)
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post #5 of 6 Old 05-15-2019, 02:02 PM Thread Starter
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Re: LT-155 mower won't back up

OK - I cracked the code on why it wouldn't go in reverse. Stacked tolerance..... Each linkage point had worn enough that when combined the reverse pedal wouldn't travel the distance to engage reverse. There's no real 'adjustment' to them so instead of reworking 3 or 4 pivots - I cut the pedal arm and welded an extension to it. Now it sits a bit higher and has the travel to go in reverse. It will be many more years to wear enough to not work again.

Stephen

80 JD-400: backhoe - Front loader - 54" blade - 42" rototiller
89 JD-318: 54" blade - 42" mow deck - 30" rototiller
99 LT-166: V-twin - 42" Freedom mulch deck
00 LT-155: 42" Freedom mulch deck (now a cart tug)
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post #6 of 6 Old 05-15-2019, 03:30 PM
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Re: LT-155 mower won't back up

I have an L110 with a similar problem. I was able to massage the fenderdeck so the reverse pedal has more travel. I also added some rubber hose around a tube at a worn spot to cause the reverse pedal to sit up higher.
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