Tag Archives: Tractor

Replacing the Drive Belt On A 1998 Simplicity Broadmor 16HP Tractor

This fall we had a ton of leaves to mulch as usual. This means every week I mow our acre and a half for about two hours at a time. Long ago, I replaced the OEM Simplicity blades with Oregon Gator blades in the tractor’s 44″ mowing deck to help with this. At any rate, I pushed on the parking brake and all of a sudden heard a weird rattling sound so I turned the tractor off expecting to see a branch stuck underneath – no such luck. I started feeling and looking around and the drive belt felt loose and the idler assembly was as far as it could go. I looked closer and could see the cracks in the 21 year old original drive belt. Argh …. it needed a new drive belt and I really didn’t have the time but what are you going to do?

Finding the Belt

Simplicity did me a favor by having a decal under the hood that identified the drive belt part number along with a few other belts:

The top one is the drive belt – the 1717932 part number.

The correct drive belt part number for the tractor is the 1717932. If you look that part number up, it is an 84″ belt with a 4L profile. “4L” means that the top of the V=belt is a 1/2″ wide and from top to bottom, it is 5/16″ tall. The “L” means the belt is for light industrial or lawn & garden use.

Now, one could argue the original belt lasted 21 years so just get the same thing – either an original Simplicity part of a good 4L-84 belt. I tend to like safety margins and when something is a bear to do, I really just want to do it once and not worry about it again for a long time if ever. I have no idea how long the tractor will last – I’m replacing parts like the ignition switch and starter and even more recently torquing the motor mount screws back down. More concerning is that it smokes just a tad after it starts (wearing valve stem seals I bet) and has a slow oil drip (seals). At some point it will die on me but I do hope it is a long way down the road plus a friend pointed out I like tinkering and it gives me something to do – as if I ever have free time anways.

At any rate, let’s get back to the drive belt. All belts deteriorate over time. The question becomes how fast will they break down? There are many factors including the rubbers and fibers used plus the strain placed on the belt. 21 years was really a good run but I wanted to up my game and move to a 4LK belt – the “K” means that that Kevlar fiber is used vs. polyester or whatever.

Ordering The Belt

Once I knew the Simplicity part number, it was easy to do the searching and I found a Kevlar belt on Amazon that I ordered. Amazon’s delivery speed is astounding now – I have Prime, ordered in on 11/21 and receiver it on 11/22! I like Amazon because I can see the ratings and the delivery speed is fantastic.

I did take a bit of a gamble on the D&D PowerDrive belt – it had one good review and one complaint that it was the wrong size. D&D belts get mixed reviews but seem to be more positive than negative so we’ll see. I’ll post updates about how well it lasts because it definitely will be installed correctly.

If you are wondering why I didn’t get a Gates or a Dayton – I tried to go with an easy purchase experience. Hopefully it sorts out in the long run and time will tell.

How to Install the Belt

The installation went pretty well with two notable exceptions that I will cover shortly. I did some digging on the web and found a PDF of what to do that I then converted into a screenshot for you:

My two biggest headaches were unplugging the PTO clutch snd the moving the damn cotter pin on the brake rod. For the PTO clutch electric fitting, slide a blade up under the locking tab and then keep working around the block with a small screw driver to try and loosen it up. I suspect that fitting hadn’t been disconnected since the factor and it did not want to come loose. Be careful to pull the fitting apart by focusing your efforts on the plug and the housing – if you pull on the wires, they may pull out. Eventually it did come apart and when I reassembled it, I applied silicone di-electric grease to both seal the connections and ease disassembly in the future.

The hardest step was removing the cotter pin (C) that secures the brake rod (A) onto the brake lever (B) in Figure 42 above. It is an absolute pain in the ass to get to and I had to work blind because I could only get one hand back in there. How they made it a pain was that the closed end of th pin was facing towards the inner rear meaning I could not hook it and pull. What I did was to take and hook the flared ends and pulled them relatively straight. I then shoved one jaw of a pair of needlenose pliers into the eye of the pin. To remove the pin, I then rotated the pliers and wound/curled the pin around the jaws until it was out of the hole. Sheeesh. When I reassembled it later, I put the eye facing the front of the tractor so I can grab and pull it way easier. By the way, I did not use a Dremel to cut out the pin because the plastic reservoir for the transmission oil was too close for comfort.

Before you remove the old belt, pay careful attention to the belt and how it passes around the brake assembly, through the idler assembly and around the arm. The illustration above is pretty good but the devil is in the details and the belt must not rub on anything when reassembled. My tip would be to take a ton of digital photos to refer to. In the old days you had to sketch stuff and the photos are way easier.

Here’s the original bet relative to the brake assembly.
Idler view one
Idler view 2
Clearing the steering arm
The electric PTO clutch
The original belt was in tough shape
The new belt was just a tad bit shorter when I stretched them out side by side with my hands. I learned years ago to confirm the belt as best you can before you install it. I double checked the part number on the bag before I even began just to cut my risk. It sucks to have stuff apart or be in a real awkward position and then find out you have the wrong part.

In Conclusion

Kudos to Simplicity for a good illustration and guide. Re-assembly went smoothly and I then mowed/mulched leaves for two hours including some really thick areas so it passed the first trial by fire. Looking up under the tractor, the belt looks solid – no fraying or cracks. We’ll see how it holds up over time and I’ll report back but so far, so good. I hope this helps you out.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Getting the Simplicity Broadmor 16 Hydro Lawn Tractor Ready for the Season – Air and Oil Filters via Amazon

Given we live in a rural area, it can be a challenge trying to find the right air and oil filter for our Simplicity Broadmor 16 Hydro tractor.  It has a Kohler engine and the air and oil filters are readily available on Amazon.   It makes life way easier to just order them.  Sometimes I’ll get a deal on several and have one for the following year.

So, just to make things easy for you, here are links if you need to order them:

I only change the oil filter once a year.  If there’s a real good deal, I might buy a two pack.   You can search and double check prices.

For the air filter, I definitely use the model with the pre-cleaner.  The foam pre-cleaner catches a ton of dust.  Each year I have to clean and re-oil the pre-cleaner several times due to all the dust.

I change these each season plus I grease the oil fittings.   When we got the tractor I asked the mechanic who delivered it what would be the one thing he’d recommend to get long life from the tractor.  Of course he pointed out the oil and air filters but then he added to make sure to keep the tractor greased using the Zerk fittings and I have ever since.

I hope this helps you out some as well.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Fixed a Starting Problem on my Simplicity Broadmor 16 Hydro Tractor

We bought this Simplicity Broadmor 16HP lawn tractor back around 1999-ish and it has served us well.  In the years since, I’ve had to replace a few parts and figure things out as the dealer went out of business.  Luckily, finding parts is pretty straight forward given the WWW and Amazon.

At some point last summer, the tractor began to develop intermittent problems with starting when it was hot.  It didn’t happen all the time and was a bear to try and find – sometimes you’d turn the starter switch and nothing would happen.  Well, I just assumed it was the solenoid given similar problems with cars over the years.  I did some digging and bought both a solenoid and starter off of Amazon.  In the Simplicity, and many tractors for that matter, they are two separate parts mounted away from each other.  The solenoid is up under the dash held in place by two screws and the starter is held in place by two screws and a collar.

I ordered a Caltric Starter for the Kohler CV16 engine and it mounted up just fine.

I ordered a Stens 435-099 starter solenoid and it went in just fine as well.

Well, I thought I was set but the problem got worse.  In a ways, that was a good thing.  Because when the problem happens readily, you can sort out what is wrong.

This spring, when we got the tractor out, every time it would get hot it would not re-start.  I put my multimeter on the starter power cable and it was dead.  I did not hear any clicking from the solenoid either.  If I wiggled the switch then it might start but not always so the switch made me suspicious.  If I used jumper cables and went right to the starter, it would start and run no problem with the key one.  Okay, time to replace the switch.

I did some digging and the replacement switch was a Briggs and Stratton 1686734SM unit.  I got that on order from Amazon and waited for it to show up.

Now there is just a bit of a twist here that I want to share with folks to save you some time.  It turns out the tractor was built using an all plastic switch (groan) part number 1718305 that requires you to change the wiring in the connector.

Note the letters next to the male spades – this is how you confirm it is the 1718305 switch – the layout of the pins:

It just so happens that to use the replacement 1686734SM unit, you need to diagonally swap the four lower wires – upper left to lower right and upper right to lower left.  They recommend you label the wires before you do the swap – I just jotted down the color codes.

The following photo is from the instruction sheet that came with the switch — it’s actually well done and helped me figure this out:

Figure 2 shows the identifying marks for the plastic 1718305 switch and exactly matched what I had.

Figure 3 shows the pin out of the original connector

Figure 4 shows the new lay out.

In case you lose track of the wires for whatever reason, here are the color codes that are in my Broadmor by labeled connector pin:

  • A.  Red / White (meaning primarily red with a white stripe)
  • B.  Red — this is from the battery so make sure your battery is disconnected
  • G.  Black
  • L. Red/Black
  • M.  Purple/White
  • S. Blue/White

First, disconnect the negative cable from the battery or you risk some fireworks when you change the red/hot wire.

To change the wires around, I moved them a pair at a time – just the lower four are changing — I ran a small blade screw driver in and loosened the female spade fitting inside the connector and pulled it back out gently with a pair of needle nose pliers.  I then swapped the location and pushed each connector into the new location.

To seal the connections, I applied a layer of silicone grease on the female connector openings so that when the male spades pushed in, they would be coated with the grease.  I have a jar of Mission Automotive brand Silicone grease that I use all the time.

I then confirmed the layout one last time, sat on the tractor, made sure the engine was clear and started it.  Everything worked on the first try – a good sign.

The switch fit nicely inside the OEM hole.  It comes with extra parts for mounting and I just did what Simplicity did – I installed the switch, used the supplied hex nut to secure it on the front and pressed on the switch cover.  I then tested again just to be safe.

By the way, here are photos of the back of the installed switch:

I then mowed part of the lawn for 10-15 minutes and when the tractor was good and hot, I turned it off and back on several times.  I then let the tractor idle for about 10-15 minutes and again could turn it off and on with no problem.

I think the problem is solved as the tractor is still working just fine.  I wanted to post this in case you needed to know what to get from Amazon or see the wire colors and hope it helps you out.

7/20/19 Update:  I did the above in June 2018 and the tractor is still running just fine.  All of the above have held up without any problems.

5/23/20 Update:  Still holding up just fine.  I’ve mowed the yard two times this year.  No problems.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.