Making Brush Attachment for Husqvarna walkbehind mower - Page 2 - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
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post #16 of 22 Old 03-14-2019, 05:09 AM Thread Starter
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Re: Making Brush Attachment for Husqvarna walkbehind mower

Went back to CasterLand yesterday, to get the front tires matched (should have taken both tires in the day before). One was 4.10x3.50-5, and the other was 11x4.00-5 (visually different tire diameters), and they didn't have 4.10-x3.50-5 (this tire looked better, so I would have preferred to keep it), so I had it changed to a new 11x4.00x5 4ply slick, and then comparing the new tire with the used 11x4.00-5, the used one was visibly larger and rounded from age and wear, so I had it changed to a new tire as well.

They didn't have longer wheel spacers in stock, so I made new spacers for the front wheels from some tubing I had. I cannot believe how bad the old bearings and spacer were.
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New boots installed:
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Today, I fabbed up some 7" extensions for the handlebars. Still have to extend the hydro control rods to match, and also lengthen the wiring harness.
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post #17 of 22 Old 03-15-2019, 01:33 AM Thread Starter
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Re: Making Brush Attachment for Husqvarna walkbehind mower

Bought a waterproof rocker switch and then fabbed up a mount for it, so I can toggle it without having to lock the controls. I was going to wiring it in place of the existing push/pull switch, but it's got the logic for killing the engine if the pto is enabled and the operator presence switches are open, so instead, I'll keep the existing button and just wire my toggle switch inline, so all the safety features are retained.

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post #18 of 22 Old 03-17-2019, 03:03 AM Thread Starter
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Re: Making Brush Attachment for Husqvarna walkbehind mower

Lengthened the wiring harness, and spliced in the new rocker switch inline with the existing pto button, bolted/wrapped everything down, and tested the switch out and it works fine.

Also lengthened the 2 hydro control rods just under 8" so they will work with the newly raised handlebars. I butt-welded them, then put some short pieces of tubing over the welded portions for additional support, as the way Husqvarna has configured their system, these rods are always under compression, so they want to bend:
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post #19 of 22 Old 03-18-2019, 03:52 AM Thread Starter
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Re: Making Brush Attachment for Husqvarna walkbehind mower

Made some new "swivels" for the control rods, as the old ones were ovalled. And when I rebuild the hydro controllers, I'll fix the arms on them that these go into, as they are ovalled as well.

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Installed the control rods, and then worked on removing the height-adjustment lever, as it's stuck (evidently, the P.O. never noticed the grease nipple).
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post #20 of 22 Old 03-19-2019, 03:02 AM Thread Starter
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Re: Making Brush Attachment for Husqvarna walkbehind mower

Today I got the deck height-adjustment lever off, it's been stuck since I bought it. I had to make a prying tool to help get it off, as it was really stuck on the bushings it's supposed to rotate in. I had to pry off a flat bushing, then break off the flange off a flanged bushing, before being able to pound it out of tube it rides in. Then I had to cut off one of the bushings from the inside shaft (the one with that I busted the flange off), but was able to salvage the other bushing by alternating between brake cleaning fluid and penetrating oil to get it off. Now, I need to replace the inside shaft attached to the lever, as when I pounded on the end of it, it got mushroomed a bit (easy to fix with an angle grinder), but the groove for the retaining clip also got mashed together.

I also removed the engine from the frame, in order to fix the crankshaft seal.
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post #21 of 22 Old 03-20-2019, 03:11 AM Thread Starter
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Re: Making Brush Attachment for Husqvarna walkbehind mower

Finished up getting the mower deck height lever working again. Made a new pivot pin for it, welded it in place, replaced the grease nipple, and modified a bushing I bought yesterday to have the right ID (it was 3/4", and it needed to be 7/8").
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The lever now easily and smoothly goes through the full range, whereas previously, I needed to use a hammer to move it.

I also started on making a fitting for the engine oil drain, so I can attach a hose to it so oil changes will be a little cleaner (vs removing a plug and just letting it run all over the frame, which seems to be Husqvarna's idea for an oil change)... This is thread attempt #2, as #1 was dimensionally correct, but was left-hand thread...doh.
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post #22 of 22 Old 03-21-2019, 03:57 AM Thread Starter
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Re: Making Brush Attachment for Husqvarna walkbehind mower

Almost finished up making my oil drain plug (20mm coarse thread into the block, with a O-ring seal, to a 3/4" barb, for a short hose with another barbed port, with a cap that is removed to drain the oil from the engine. It's a ridiculously large size for the engine (a Kawasaki FH541V), I think I'll need a 1" wrench and maybe a 1.25" wrench to get the cap off.

Top item is the original plug for the engine, middle is my custom-made part, bottom is the output "port" that gets capped.

Still have to use my grinder to put some flat parts on the round section of it, so it can be tightened with a wrench.
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I also pressure-washed the Husqvarna frame and engine, now it's going to the side while I wait for some parts for it. In the meantime, I'll reshingle the garage roof and change my other large walk-behind mower to a blower powered by a deck pulley instead of the current one which is powered by a separate gas engine (as part of a grass catching system I added to it a couple of years ago). It'll cut down on the mowers weight, and the engine doesn't seem happy with the rebuild I did on it last year.
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