Snapper series 6 Briggs model 191707 type 251501 Having trouble removing drive pulley .

[Snapper series 6 1987]

Trying to remove the drive pulley and wondering if the pulley has to be unscrewed or just removed by heat and tapping. There are threads visible inside the bottom of the pulley but nothing I can find says it has to be unscrewed. There is no bolt from the bottom. Possibly it fell off but it's an old machine so not sure. Thank you for any information. Penumbra75@aol.com is my email.

 

[ILENGINE]

The disc should unscrew from the shaft collar. The shaft collar is held on by if I remember correctly 2 set screws, and then should slide off if not stuck to the shaft.

 

[Snapper series 6 1987]

The two set screws came out so easily I thought I had it made. Been trying all the usual sprays (ATF, WD 40 etc) heated it up and tried driving the shaft while the motor was suspended with 2x4's under the pulley. Initially I figured there had been a retaining bolt from underneath but none show up on the diagrams or videos. I'll see if it will unscrew and then heat it up with MAP or acetylene if I can find someone with a torch. All the shops around here (Mandeville , LA) are gone and the dealers only want to sell me one of those $4000 zero turns that must weigh 500 lbs or more. Thank you for the tip. When I saw those threads starting to chip off inside the collar I figured I better ask to see if anyone has dealt with this specific drive pulley. I'm an old disabled jarhead and I really need to get this "ole reliable" going again. Thank you again for helping. Let's see if it works!!!

 

[slomo]

Guessing she is rusted onto the crankshaft. Two set screws are all I know about securing it on the crank. I couldn't get mine off either.

There is an adjustment needs to be made. The depth of the steel drive disk TO the rubber ring, driven disk. If yours doesn't pull a hill then you need more contact here.

Several ways to remove it. Candle wax and a propane torch. MAP gas is no longer made. It was only 50 degrees F hotter anyway. Everyone swore by MAP gas LOL. Basically the same burn temp as propane. Air hammer if you can get on it. Soak it in PB Blaster for a couple weeks no joke. Spray it down daily.

 

[Snapper series 6 1987]

Thank you for the tips. If the pulley is not screwed onto the shaft that makes things easier. I've been soaking it and every now and then giving it a whack with a socket on the end. I've tried the candle wax but I think I put the flame too near the crankshaft so it was also hot.

Also very helpful to know about the MAP gas. A torch with one tank is $70 , I've got several propane tips so I can save the $70 for a mere 50 degrees hotter. It's actually moved a little , what stopped me was seeing those metal shards inside the opening. I've got the engine hanging upside down with the weight on the pully via 2 2x4's.

The main reason I put up the post this morning was to ask about weather the pulley was screwed onto the crankshaft. I have compressed air so I can hammer it as well. Thank you again.

 

[hlw49]

Snapper had a special puller to remove the drive disc off the engine. Use to have one but can't find it now

 

[Its Me]

Snapper, I still have the puller, and it screws into the Disk and a solid thread bolt contacts the crankshaft and pushes the adaptor off, I can send a pic, what you do is unscrew the disk, that will only leave the color, remove the set screws, LPS in the holes and get a wheel puller two jar put you a blot in the end and pull if off, course you probably know to set it in neutral.​

 

[Snapper series 6 1987]

I sure wish I had known about this forum before I started. I have a Briggs and Stratton Service and repair manual (copyright 1992) I got 20 years ago and it's been a great resource. Chapter 13 has all the special tools down to shop towels , washers and nuts. No mention anywhere of this puller that only after reading your message did I know one for this specific engine existed. Glad I stopped pounding on the shaft since It was starting to chip away threads. I think I stopped in time. If you can please put up a picture of the puller/bolt that would be very helpful. Bolt size and tread info would be fantastic. Not one video , article , podcast or manual mentions this puller for the series 6 mower. I watch all the tarydactyl , donnie boy, chickacanic videos and no one mentions a puller for possibly this one crankshaft pulley. None of the others says anything about those threads or a bolt to get it off with. I'm going to dig in my parts barrel and see if I have anything that matches that thread. I do have a lot of taps and dies and might have one that matches this.
* the only bolt puller I can find in this chapter 13 is on page 13-4 part number# 19238. I'll copy that page and put the picture up on here.

I have the Snapper parts manual #06082 with a drawing of the pulley on page 24 but no mention of a puller or how to remove it.

 

[slomo]

Once you get the pulley off the crankshaft, please glob the snot out of the end of the crank with anti-seize goo. Next guy will thank you upon removal.

Same goes for those rear hubs on those machines. Anti-sneeze the crap out of those axle hub pieces.

 

[Snapper series 6 1987]

Once you get the pulley off the crankshaft, please glob the snot out of the end of the crank with anti-seize goo. Next guy will thank you upon removal.

Same goes for those rear hubs on those machines. Anti-sneeze the crap out of those axle hub pieces.

Will do if ever I can get this thing to let go. It's like a Lousiana tick...just burrows in deeper. The information in both Briggs and Snapper manuals and parts diagrams offer no ideas on how to remove it. Tons of pages about carbs though.