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1  For Sale / Trannys / Axles / Wheels / Pair of Carlisle Super Lug 20x10.00-8 Pulling Tires on rims on: May 14, 2015, 11:47:38 AM
  Selling this pair of almost-new Carlisle Super Lug 20x10.00-8 pulling tires on used rims with 3/4"-bore, 3-1/2"-long offset-hub wheels.  These are 4PR tires with tubes installed; they have a couple hours run time but still have the mold nubs on them.  Tires are in excellent condition; wheels are in very good condition, not bent or damaged.  Will take $95.00 + shipping for the pair (MSRP is $157 per tire new).  Prefer email correspondence -- email address in my Profile.

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
2  General / Coffee Shop / Return phone call not connecting to Scott Barlan (?) in NJ on: May 11, 2015, 09:23:31 PM

   Last Friday morning (5/8/2015 at 10:25 Eastern Time), I received a call on my shop answering machine from a Scott Barlan (not sure on the last name -- message was kind of garbled) asking about parts for an 820-017 transaxle.  He left his return phone number as .  From the Area Code, he's in New Jersey.

   During the school year, my shop is closed on Fridays, but I've tried numerous times since Friday evening to reach him, and I keep getting the recording, "I'm sorry, but the person you called has a voice mailbox that has not been set up yet."

   Does anyone know Scott?  Could you please let him know I've been trying to reach him?  I'd like to help him out.

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
3  General / Coffee Shop / Vari-drives on: March 06, 2015, 02:09:58 PM

   USLMRA rules for Drivelines specifically exclude vari-drives (mistakenly misspelled "veri-drives") for the Junior Prepared (JP) and IMOW (I) Classes.  However, the IMOW Class states, "1) TYPE: Must be a full-size lawn tractor, front engine, with steering column behind motor, stamped steel frame and manufactured as such..." 

   So...what are JP- and I-Class racers to do who have one of the later-model Husqvarnas, Sears/Craftsmans, or Poulan mowers that come with the General Transmissions' polymer-case vari-drive transaxles?  If they replace the transaxle with a gear-drive, non-vari-drive gearbox, the mower will no longer be "manufactured as such."

   The Prepared Classes only state "Driveline may be modified from the engine pulley to the rear wheels, but must utilize a shiftable
lawnmower transmission or transaxle." 
Since the General Transmission transaxle can be shifted, this is apparently okay in these Classes.

   I'm not sure how these new vari-drive transaxles will withstand the rigors of racing, but since experimentation and trial-and-error is the basis for most of what we do, and since most racers start out in the "less-expensive" classes, racers need to be allowed to experiment with them.

   Time to modify the rules...?

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
4  For Sale / Trannys / Axles / Wheels / New Transaxles, Gearsets, Wheels, Hubs and Related Drivetrain Parts on: February 11, 2015, 10:00:39 AM

   If you are looking for new drivetrain-related components, logon to
http://roms-peerless-transaxle-supply.ecrater.com/ and enter what you are looking for in the Search box.  I specialize in 820 transaxles and high-speed Gearset Upgrades, but I also have available other discount-priced transaxles, wheels, hubs, etc.

   If you need to contact me, please use my email address (it's in my Heymow Profile), as I check my emails much more often than I do my Heymow Messages. Thanks!

Respectfully; Rodney Rom, Peerless Gear Master Technician; Rom's Reworks; Butler, MO
5  General / Coffee Shop / 'Tis the Season... on: December 17, 2014, 09:39:51 AM

  A Blessed Christmas to All!  [color=orange]Or, if you are of the Hebrew persuasion, a Happy Hanukkah![/color]  And a Healthy, Safe, Prosperous and Victorious New Year!

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
6  Mower Building / Setup Help / Driveline / Dedicated 820 Peerless Racing Transaxle on: November 18, 2014, 02:52:12 PM
Heymow Transaxlers,

   Now that Peerless has the dedicated 700-139 racing transmission, I was wondering if they would be interested in offering a dedicated 820 racing transaxle, so I sent them an email with my thoughts:

   1. Reviving the obsolete 820-017 would be the best place to start.

   2. Like the 700-139 transmission, offer it "as-is" with no warranty, no lube, no brake, no Reverse (spacers instead), and since most racers prefer to supply their own axle, no axle.

   3. Instead of the late-model 820-017 ratios:
1st - 2.33:1 (15T:35T)
2nd - 1.50:1 (20T:30T)
3rd - 1.17:1 (23T:27T)
4th - 1.00:1 (25T:25T)
5th - 0.61:1 (31T:19T),
1st - 2.33:1 (15T:35T)
2nd - 2.13:1 (16T:34T)
     or 1.78:1 (18T:32T)
3rd - 1.50:1 (20T:30T)
4th - 1.17:1 (23T:27T)
5th - 1.00:1 (25T:25T)
to make it more of a "close-ratio" transaxle.

   4. Use the standard 772159 'A'-Input Cover, with the 770106 Case from the 017, so there are provisions for the shift shaft to come out the top and bottom.

   5. Include both the standard 778375 short Shift Shaft for racers who want to use the transaxle pulley-top, and the 778359 Shift Shaft from the 017 for those who want it bottom-pulley, allowing the shift linkage to remain on top.  Also include the 017 Welch plug to plug whichever shift-shaft hole is not being used.

   6. Use the standard 776274 Input Shaft (full 3/4"-diameter for strength), and have the racer who is using the transaxle pulley-down field-drill the side of the Woodruff key for additional pulley retention, to supplement the snap ring.

   I would guess that we would be looking at somewhere in the $400-$500 range on cost, but I asked them about this, as well.

   Please Reply with your thoughts and feedback so I can attempt to give them some possible volume figures, as potential sales volume will dictate whether they decide to produce it.

   As part of the email, I also asked if Peerless has ever done any dynamometer testing on transmission-vs-transaxle horsepower loss.  Some racers are of the opinion that using a 700 transmission with sprockets and chain to the drive axle uses less horsepower than a transaxle with its internal final-drive gears to the drive axle.  I question this train of thought, since the 820 final-drive gears ride on shafts supported by friction-reducing needle bearings, making the horsepower loss fairly equal to the chain being flung around the sprockets.  I will post whatever scientific engineering data they reply with.

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO

7  For Sale / Trannys / Axles / Wheels / Used 639A Peerless Transmission on: November 04, 2014, 11:52:52 AM
   Free to a good home (pick up; no shipping):
One (1) used Peerless 639A transaxle.  Three-speed plus reverse.  Removed from a Dynamark Model 5188-1300, vintage 1983-'84.  Seems to shift OK (includes shift lever and mount collar); pulley spins freely and smoothly; left axle turns; right axle appears frozen; wheels-&-flat-tires appear rusted to the axles.  Includes frame-mounting brackets.  Cleaned up boneyard last week and didn't have the heart to scrap it. Too big to package and ship, unless you want to arrange packaging and shipping.  Pictures available with email address.

   I will hang on to this for a reasonable amount of time.  If no interest, I will scrap it.

Rodney Rom
Rom's Reworks
4276 NE State Route H
Butler, MO 64730
8  General / Coffee Shop / New "Fits All" Engine Help Category? on: October 27, 2014, 04:04:27 PM

   What about starting a new heading in the Engine Help section entitled "Fits All Engines"?  I notice that there are regular posts to the Coffee Shop section that actually have to do with engine help for any engine. This would be a quicker way to find engine help that is not brand-specific.

  Your thoughts?

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
9  Mower Building / Setup Help / Driveline / Murray Transaxles? on: October 23, 2014, 10:23:41 AM

   I am trying to compile a list of the transaxles Murray used in their late-model riders -- mid-engine, rear-engine, standard, or wide-body -- anything from 1997 to now.  When you look one up in the Murray Parts Lists, all they show is "Transaxle, Peerless (or Dana / Spicer) -- For Replacement Parts, see the Central Service Distributor in your area."  So...whenever any of you come across a Murray rider with its original transaxle, please note the Model Number of both the Murray and the transaxle, then let me know.  All input greatly appreciated!

   If you're unsure of the date of the mower, most late-model Murrays used Briggs & Stratton engines, so look at the first two digits of the engine Code Number -- that tells the year-of-manufacture of the engine, and that is usually also the year of the mower.

   You can Reply here, PM me, or if you want to call me directly or email me, my Contact information is in my Profile.  And yes, I am interested in hydrostats as well as gear-drive transaxles.  If I can compile a reasonably complete list, I will Post it here.

   Thanks!  Wink

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
10  General / Coffee Shop / Returning answering-machine phone call messages on: September 25, 2014, 07:32:05 PM

   Do any of you know a David Cass in Coco Plains, Tennessee?  I'm not even sure on the name and spelling, but if you do know someone close to that name and location, please have him get back to me.

   This afternoon, I received a phone call on my shop answering machine, since I was outside the shop at the time the call came in.  When I checked the messages, "David" wanted to know if I still had the differential locker gears for the Peerless 820 transaxle.  I do, and I pride myself on taking care of my customers, as most of you already know, but at the end of the message, "David" said, "You can call me back on this number."  The only problem is -- he didn't tell me what number, and since I don't have CallerID, I don't have any way of getting back to him.

   When leaving an answering-machine message -- to anyone -- make sure to leave your call-back number.  It's a matter of simple phone courtesy.  And if you have to leave a message, speak clearly and distinctly, especially if you are on a cell phone (my phone is a hard-wire landline), as nothing is more frustrating than having to listen to the same message numerous times to try to decode the scratchy and static-filled message in search of a name and number.


Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
11  Mower Building / Setup Help / Driveline / Peerless 820 Transaxle: Torque vs Gearset Upgrade Computation on: April 13, 2014, 12:29:16 PM

   I have been asked about whether changing to one of my Final-Drive Gearset Upgrades will increase or decrease torque with an 820 transaxle.  Well, let's see...  For purposes of computation, this Post will use a 20hp engine driving the transaxle with a 1:1 pulley setup (the engine pulley and transaxle input pulley are the same size) at the engine’s top governed no-load speed of 3600 RPM.  For simplicity, we will also use the 1:1 (25T:25T) gear-selector ratio, which is normally 3rd or 4th gear in most 5- and 6-speed 820s.

   The stock input ratio is 2.54:1.  The stock final-drive ratio is 8.02:1.  With the 1:1 gear-selector ratio, this gives a 20.37:1 reduction ratio, meaning that at 3600 Input RPM, the axles are turning 20.37 times slower, or 177 RPM.
   Gearset Upgrade 1 changes the 8.02:1 stock final-drive ratio to 5.61:1, meaning that the axles are turning at 253 RPM.
   Gearset Upgrade 2 changes the 8.02:1 stock final-drive ratio to 3.44:1, meaning that the axles are turning at 412 RPM.

   To convert these RPM figures to Torque, we will need to use the standard scientific formula Torque = (HP x 5252) ÷ RPM.

   With the stock final drive, this gives us 20 x 5252, or 105040, ÷ 177, which equals 593 units of axle torque.
   With Gearset Upgrade 1, we have 105040 (the same 20hp and 5252 formula constant, multiplied) ÷ 253.  This gives us 415 units of axle torque, a 30% decrease, or 70% of stock axle torque. 
   With Gearset Upgrade 2, 105040 ÷ 412 gives us 255 units of axle torque, a 57% decrease, or 43% of the stock axle torque.

   So, even though the Gearset Upgrades give us increased axle speeds, we have less torque available.

   If you know your engine horsepower and RPM, you can use your pulley sizes and the above formula to compute torque for any of your gear ratios.

   And, for those fortunate enough to be running the "017 Kit" with a 2.31:1 Final Drive Ratio, your axle is turning at 613 RPM, with a corresponding torque value of 171 units, 29% of stock torque (a 71% decrease).

   I hope this helps.

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
12  Mower Building / Setup Help / Driveline / Peerless 700 Transmission Mount-Bolt Pattern on: March 07, 2014, 08:21:36 PM

   The mount-bolt pattern drawing for the Peerless 700 transmission. This view is the bottom of the transmission.

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
13  General / Coffee Shop / Lightweight engine template for engineering your drive system on: February 24, 2014, 11:53:01 AM

   Once you have your engine built and fit to your chassis, and you need to do the trial-and-error dimensioning and fitting of your drive system, wouldn't it be much easier if you didn't have to muscle around that heavy engine?  Well...now, you don't have to.  This engine-pan-and-crankshaft template that costs next to nothing allows you to save back muscles and sweat while getting your drive system lined out.

   I made this template from an old derelict 28-cube B&S crankshaft and oil pan.  
   After cleaning the oil pan and crankshaft, I took the crankshaft and cut the bottom part of the counterweight off, just above the flange that holds the cam gear in place (Photo 1).  
   After squaring and smoothing the cut, I took an old piece of flat stock I had lying around, in this case, a piece of 1/4" aluminum plate (for further weight reduction) that was 1-3/8" wide and 10" long.  I laid this above two diagonal pan-bolt holes, punch-marked the hole positions, then drilled-and-tapped the holes 5/16"-18 to match the threads of the original oil pan bolts, since two of them would be used to hold the plate over the crankshaft stub.
   I then got four nuts to use as jam nuts, and assembled everything as you see in Photos 2, 3 and 4, leaving just enough air gap (0.010"-0.020") to allow the PTO part of the crankshaft to turn freely (Photo 5).  A couple drops of oil on the pan-bearing journal will keep this "tool" lubricated for a long time.

   Since the pan-to-chassis mounting pattern is standard for almost all engines over 8hp, this template can be used no matter which engine you are installing in your chassis.  Just bolt it to the chassis, install your pulley, and have at it!

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
14  Mower Building / Setup Help / Driveline / Using transaxles as transmissions on: January 31, 2014, 01:41:07 PM
   I recently had a customer inquire about taking a transmission, removing one-side axle shaft, locking the differential, then putting a sprocket on the remaining axle to drive the rear axle.  I had never had anyone ask that question before.

   In researching an answer for him, I determined that if someone wanting to do this would lock the non-sprocket axle, leave the differential functioning, and put a sprocket on the remaining axle, the sprocket axle would turn twice its normal speed, thereby increasing the output speed of the transaxle.  Since the MSTs, 930s, 800/801s and other transaxles do not have higher-speed gearsets available for them, this would be an interesting way to increase output-shaft speed.  Since there wouldn't be wheels mounted to the axles, shorter axles could be used.  And since the sprocket would be driving the rear axle at the side, just inside the wheel, a single brake disc could be mounted in the center of the axle.

   I realize that there would be a slight weight disadvantage to this setup, but it does open up possibilities.  Your thoughts?  Rule compliance?  Rube Goldberg?

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
15  Mower Building / Setup Help / Garden Tractor Pulling / Scale model tractor-pulling clip on: January 11, 2014, 09:07:16 PM

   Check out https://www.youtube.com/watch?v=ACkmg3Y64_s .  The pulling segment of this unbelieveable scale-model layout is brief but well worth watching.

Respectfully; Rodney Rom; Rom's Reworks; Butler, MO
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