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View Full Version : Exmark Lazer Z HP problem


landscaper22
05-01-2010, 09:34 AM
I have a 2003 HP and just made a few repairs to the unit and while I had the unit tore apart, I decided to change both belts, since they needed it anyway. Got everything done and mower cranked just fine. I engaged the blades and the mower cut off. Now it will not crank or even turn over. It almost seems like a safety switch override or something. I checked the connection at the PTO switch and it wasn't loose or anything. Anyone have any suggestions as to what it might be??? This has been a great mower, but I tell ya, it hit 1100 hours and has been nothing but one problem after another. :dizzy: Thanks for any suggestions.

sharpcuts
05-01-2010, 11:40 PM
If I had to guess I'd say the PTO switch decided to quit about right then. Totally coincidence. I've seen things like that more than once. You make a repair, go to use it & it quits. Logic says it has something to do with what you just did. That can lead you in circles for hours (days?). The switch is cheap. I'd start there. I've had enough dealing with the safety system on exmarks to get the feel for them. Here's another tip. See if you can get your dealer to print you a copy of exmark's COLOR safety system diagram. It has a sequential troubleshooting plan for the entire safety system. As far as I know this diagram is available only on the exmark's dealer web. (I used to work for one)

landscaper22
05-02-2010, 04:36 PM
Thanks Sharpcuts. It probably is just a coincidence. I am just so irritated with this mower. I would just let it go, but I have put so much time and money into it over the past few months.
Back before Christmas, I took the deck off and had new baffles welded on it, so it is like new. While it was off, I installed one new spindle assembly because the old one had a lot of play in it, so I was on borrowed time. About the same time I had a problem develop in the electrical system. It would run fine for awhile and suddenly just cut off while you were driving it or as soon as you released the parking brake. I replaced safety switches, took out the old mercury tilt switch, and nothing worked. Finally the dealer looked at it and said they got some strange readings on the relay switches??? So, they replaced the switches and it worked fine for a month. Then last week, I was mowing and the mower just stopped moving. Come to find out, the tension spring on the drive belt system wore through the freaking idler arm!!!! How, I have no idea. So, I get a new part and belts and get everything back together, crank it up, and now this....
Needless to say I am pissed. Not to mention my F-250 has blown a fuse every day this week for the AC blower fan motor, and I go crank my old truck up to do some extra work yesterday, and something is wrong with the carb, and it will not run right....:cry::cry::cry:
Murphy's law has been on my case this week.
But thanks for that info, I will get a new switch tomorrow and try it.

Darryl G
05-02-2010, 06:25 PM
Wow, I've got the same unit with 1k hours on it and other than the mercury seat switch no probs at all. I did have to replace the PTO switch but that's because another piece of equipment hit it and snapped it off.

landscaper22
05-02-2010, 06:33 PM
It's crazy darryl. I have 1192 hours on it, no problems until the last 80-100 hours, other than maybe replacing two pulleys. I mean I try to do as much PM as possible to minimize my down time. Glad you have not had any problems. Hope it stays that way for you.

Cutter1
05-02-2010, 07:27 PM
check the two fuses under the seat. Sounds like one of them is blown.

Darryl G
05-02-2010, 07:31 PM
Well now you have me worried...mine is getting close to those hours. I forgot I did replace the starter too. One of the steering dampeners needs replacement too. I should change the rear whatchamacallits too...the rear deck support thingys but it's still cutting good so it's on the back burner for now. Sorry to hear it's being a pain in the tail for you. Took me a while to diagnose my machine cutting out on me to be the mercury switch. They eliminated them, too much of a shipping/disposal problem.

Cutter1
05-02-2010, 07:50 PM
I have had probably 15 hp's over the years, you name it I have broke it!! And then diagnosed and fixed it. :)

Cboy7
05-02-2010, 10:32 PM
I have found that once you get over those problems and 1500 hours.. it usually runs good for another 1500.

when it rains it pours is very true

landscaper22
05-03-2010, 04:02 PM
Thanks cutter1. It was a fuse.At least that rules out the switch. But it blows the fuse every time I replace it and turn the blades on. So I am back where I started. I guess I will take it to dealer.
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FIXDISS
05-03-2010, 10:36 PM
First disconnect the wire connector from the clutch then turn pto switch on. If fuse still blows then it is not the clutch. Check wiring to clutch to make sure you did get the belt into the wiring harness somehow.Also check for a grounded hot wire from pto switch to clutch.

landscaper22
05-04-2010, 12:55 PM
Thanks fixdiss. I did try disconnecting the clutch yesterday and still blew. I am sure it is some ground or something simple, but I have tried everything I know. I dropped it off at dealer today.I will let u guys know what they say. Thanks again for the suggestions!
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Cutter1
05-06-2010, 09:21 PM
could be a bad switch, I have got the belt caught on the wire of the clutch before also. also, one really drove me nuts last season, ended up having bad wires about two inch from the fuse, could not find that one since it had the plastic over it. changed every safety switch before we finally figured it out.

Big Bad Bob
06-22-2010, 11:08 PM
Thanks fixdiss. I did try disconnecting the clutch yesterday and still blew. I am sure it is some ground or something simple, but I have tried everything I know. I dropped it off at dealer today.I will let u guys know what they say. Thanks again for the suggestions!
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What did they find?

Exmark PR
06-23-2010, 12:48 PM
It sounds like a wire got pinched or a contact somewhere is causing the electrical system to short out to ground. These kinds of problems can be very frustrating to track down. It may be possible the PTO switch decided now was a good time to go bad or perhaps the clutch felt now would be a good time to fail or it could be that while making repairs a wire was accidentally pinched or nicked to create a short. One thing seems certain… somewhere there is a short to ground in the PTO engagement circuit that is causing the fuse to blow. It may require the dealer to locate the short and/or diagnose the problem further. I understand the frustration of tracking down problems on older machines so please feel free to call the Exmark Technical Assistance Center @ 402-223-6375. Have your model and serial number handy and they will be happy to help offer suggestions for tracking the issue and resolving it.

mezammit
07-18-2011, 09:58 PM
So last Thursday my right pump on my lazer hp went out. Picked up a new one put it in but I am still having problems with it. When the wheels are off the ground with no load on the mower they work fine. When I go to drive the mower the one side I replaced is almost to the point to where it barely has any power. I had the mower off the ground, wheel spinning, with the dump valve open for close to an hour. I am not getting any air into the reservoir. Any suggestions would be greatly appreciated.

landscaper22
10-11-2011, 11:07 PM
What did they find?
Sorry it took so long to respond. I don't get on here much now. It turned out to be an exposed wire. I guess when we were working on it, we must have done something to cause it. :) Over 1400 Hrs on that bad boy and going strong! Love my old HP.

landscaper22
10-11-2011, 11:10 PM
So last Thursday my right pump on my lazer hp went out. Picked up a new one put it in but I am still having problems with it. When the wheels are off the ground with no load on the mower they work fine. When I go to drive the mower the one side I replaced is almost to the point to where it barely has any power. I had the mower off the ground, wheel spinning, with the dump valve open for close to an hour. I am not getting any air into the reservoir. Any suggestions would be greatly appreciated.

Did you ever get the problem fixed?

mezammit
10-12-2011, 12:11 AM
Turns out there was still some metal in the wheel motor. So after replacing the pump the first time and putting it back together the metal got back into the system and took out the new pump. So 2 pumps and a wheel motor later everything is running good. I never took apart the wheel motor to really check for metal in it. I just spun it by hand ran a magnet through the lines and flushed it with oil. It was a tough pill to swallow $1200 later. Between the 2 old pumps I managed to get a $40 rebuild kit and build 1 good pump. I definitely learned a lot from the incident.

laman
10-12-2011, 12:18 AM
Turns out there was still some metal in the wheel motor. So after replacing the pump the first time and putting it back together the metal got back into the system and took out the new pump. So 2 pumps and a wheel motor later everything is running good. I never took apart the wheel motor to really check for metal in it. I just spun it by hand ran a magnet through the lines and flushed it with oil. It was a tough pill to swallow $1200 later. Between the 2 old pumps I managed to get a $40 rebuild kit and build 1 good pump. I definitely learned a lot from the incident.

Would you recommend changing pump and motor together?

landscaper22
10-12-2011, 08:12 AM
That sucks, but maybe you will get many more hours on the machine yet. I feel I am on borrowed time with my pumps. Like I was saying over 1400 hrs, so I have a feeling it is time to put some money in it, or let it go. Heck, two of the spindles are still original.