Lawnmower Graunching Sound when wheeling on hard surface

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#311937 28-Feb-2024 20:41

https://streamable.com/06kgng

I assume this is a bearing?

Sorry I am kind dumb (and slightly lazy about this stuff). Hyundai aren't great with after sales service, so I thought I'd just try and fix it myself if possible.

I assume I need to take the wheel off so I can see what stuff might need replacing?

CRC annoyingly didn't help.

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#3201063 28-Feb-2024 21:38

Doesn't sound like a bearing. Something rubbing?

Take the catcher off and see if anything is trapped under the mower.

Lift each side to get the wheels on that side clear of the ground and turn each wheel to see it you get that noise.

Is it a self propelled mower? If so perhaps something in the drive mechanism.

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#3201065 28-Feb-2024 21:44

Technofreak:

Doesn't sound like a bearing. Something rubbing?

Take the catcher off and see if anything is trapped under the mower.

Lift each side to get the wheels on that side clear of the ground and turn each wheel to see it you get that noise.

Is it a self propelled mower? If so perhaps something in the drive mechanism.

Thanks. It's self propelled. I don't get the same sound if I put the unit on it's right or left two wheels, and I don't get it on grass. It's literally only on concrete.

Will try and manually roll the wheels. It's EXTREMELY heavy for a mower that size, so it's quite hard to do, esp if I don't want fuel leaking everywhere.

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#3201067 28-Feb-2024 21:46

Unrelated but whilst anyone is seeing this thread, does anyone have a cheap source for a manual oil extractor? The oil is probably due a change after 3 years. There are video guides showing tipping the thing on it's side to get the oil out, but that usually causes fuel to come out too.

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#3201235 29-Feb-2024 07:12

I'm guessing it's got the ability to mow at different heights? Assuming that lifts the entire deck, set it to its highest cut length, slide a couple of bits of wood under the deck (they'll need to be close to being a snug fit), and then set it to its lowest cut height. The deck will sit on the wood, the wheels will lift up off the ground.

The noise really sounds like a vibration to me, not something rubbing, but I'm on sub-average phone speakers. Does it do it when you push down on the handle and lift the front wheels off the ground? Rear wheels off? Does it appear when you push it slowly along the concrete, or change depending on how fast you push it? What about when you get it to self-drive on the concrete?

Re the oil - if there is no drain bung at all (which seems rather strange, normally there is something near the bottom of the casting, often inhex or square) then I would mow the lawns until it ran out of fuel. Tip it on its side with an empty fuel tank.

Otherwise you could look for an "oil suction gun". They're not too expensive from Blackwoods or Supercheap.

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#3201237 29-Feb-2024 07:28

Plenty of cheap “oil extractor pump” listings on TM but this method does rely on fitting the suction tube into the sump via the dipstick tube or oil cap.

I use one of these to change the JetSki oil.

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#3201239 29-Feb-2024 07:34

That sounds like the self drive to me and not scraping concrete. Does it do this pulling backwards? Does the self drive engage and disengage properly?

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#3201243 29-Feb-2024 07:54

I think it's related to the self drive. One possible reason it's only happening on concrete is there's not enough friction on the grass to cause the wheels to keep rotating and they slide instead.

It sounds like something scraping past a toothed surface. Like a stick flicking against the ribs of a wheel or a gear not engaging properly with another gear.

Try engaging and disengaging the self drive. Does the engagement lever move the full travel? If the self drive control is a cable like is used for the throttle perhaps it has gone out of adjustment and not fully disengaging.

Re the oil change. As suggested do it with the fuel tank nearly empty. I do our mower by taking off the oil filler cap and tipping the mower on its side since the drain plug is located in such a position relative to the chassis that it is impossible to use.

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#3201273 29-Feb-2024 09:14

Technofreak:

It sounds like something scraping past a toothed surface. Like a stick flicking against the ribs of a wheel or a gear not engaging properly with another gear.

It's on exposed aggregate concrete so that's kind of like a toothed surface. What's the height setting? Lift it up a notch or two.

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#3201313 29-Feb-2024 10:13

Bung:

Technofreak:

It sounds like something scraping past a toothed surface. Like a stick flicking against the ribs of a wheel or a gear not engaging properly with another gear.

It's on exposed aggregate concrete so that's kind of like a toothed surface. What's the height setting? Lift it up a notch or two.

I take it you're suggesting something is scraping on the concrete. That may be the case but the noise comes and goes in a regular fashion as the mower moves. That suggests to me that the noise is related to the rotation of the wheels.

Something wrapped around the rear axle?

Looking a videos of this model of lawnmower the wheels move fore and aft as well as up and down when the height is adjusted. Perhaps just by moving the height adjuster through its full range a few times might dislodge or fix the problem.

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#3201531 29-Feb-2024 12:12

One or more wheels may be slightly out of round so the body could be rising and falling. Easy enough to lift it so the edge is well clear of ground and retest. Sometimes the edge of the blade is close to the bottom of the skirt. If it's hit something a blade tip could be scraping on lowest setting.

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#3201966 1-Mar-2024 12:20

The problem doesn't happen if it's on 2 wheels of any configuration in my testing. It's not the body scraping on the ground, it has PLENTY of clearance.

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#3204077 7-Mar-2024 12:26

Did you find the problem ?

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#3204082 7-Mar-2024 12:52

I Contacted TradeTested who gave me a RMA number and told me to take it to a Hyundai repair Lawn Mower Shop and said they would cover it so long as it wasn't a user fault.

Unfortunately, said mower shop have approx a 2 week wait from when you drop the mower off, and no they can't let us know when they are closer to our number so we don't need to be without it for a fortnight when our grass is growing like crazy.

Looks to be drive train related though.

Other than the delay in their response, TT were good to deal with. No fuss.

Will report back once the thing is fixed and issue diagnosis is available.