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Coffee Shop / Re: John Deere GT242 Kawasaki regulator pinout
« on: May 02, 2013, 09:44:14 am »
Sorry, I guess I had the check box marked to hide from public view. Thanks again.
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Scott,
Interesting questions...
Question 1: According to the Peerless 600 Series Parts Lists, your 639 has a left axle housing that's 2-11/16" long and a right housing that's 6-27/32" long. Your 612A has the same left housing but the Parts List doesn't show a Peerless right housing (?). The right housing may have been supplied by the OEM. If you have "all different length" housings, they've been changed at some point.
Axles
Left Side Right Side
Length – Part Number Length – Part Number
8-37/64” (8.578” / 21.8 cm) – 774368 10-15/32” (10.468” / 26.6 cm) – 774286
8-3/4” (8.75” / 22.2 cm) – 774352 14-27/32” (14.843” / 37.7 cm) – 774079
9-15/64” (9.234” / 23.5 cm) – 774221 15-1/4” (15.250” / 38.7 cm) – 774137
9-13/16” (9.812 / 24.9 cm) – 774304 15-21/64” (15.328” / 38.9 cm) – 774241
9-63/64” (9.984” / 25.4 cm) – 774298 16-1/8” (16.125” / 41.0 cm) – 774305
10-9/32” (10.281” / 26.1 cm) – 774138 16-13/16” (16.812” / 42.7 cm) – 774285
10-27/32” (10.843” / 27.5 cm) – 774410 17-1/8” (17.125” / 43.5 cm) – 774411
10-55/64” (10.859” / 27.6 cm) – 774240 17-13/16” (17.812” / 45.2 cm) – 774367
12-3/16” (12.187” / 31.0 cm) – 774078 17-55/64” (17.859” / 45.4 cm) – 774220
12-3/8” (12.375” / 31.4 cm) – 774284 18-39/64” (18.609” / 47.3 cm) – 774299
19-1/16” (19.062” / 48.4 cm) – 774287
The above list shows the 600 Series axles that use the most popular style of axles, the ones that have a straight keyway and a snap ring to hold the wheel on. There are other styles and lengths of axles available for the 600s, a total of 37 lefts and 34 rights. Axle lengths vary from 6-11/16” to 19-1/16” on the left and from 13-1/16” to 19” on the right. Axle-end designs came in keyed, pinned, snap-ringed, internally threaded, “Double-D” flattened (the infamous MTD), or a combination of these.
Your 639 uses left axle #774221 and right axle #774220. Your 612A uses axles not on this list, as the 612A axles use a woodruff key instead of a straight key — your 612A left axle is 7.0” long #774133 and the right axle is 17-11/16” long #774134.
For proper support, you may need to use frame-mounted ag-style bearings inside your wheels to keep the axles from bending. I'm not sure extending the supports would be a good idea. And...if your spacers or wheels are just outside the axle housing, ALWAYS use a thrust washer between any spacer or wheel and the housing to prevent the housing from being gouged.
The answer to Question 2 is "get the gaskets" since the gasket thickness is part of the clearance engineered into the case dimensions to allow for proper internal gear, shaft and bearing clearance. It's okay to use a thin layer of RTV to supplement the gaskets, but never eliminate the gaskets.
Question 3: The easiest way to lock the differential is to replace your 600 axles with MST axles and install an MST Diffy-Lock Gearset Upgrade 5 (locking spider gears), especially since ALL the axles listed above are obsolete. The inner ends on your 600 axles have the "Double-D" flats; the MST axles are fine-splined. Upgrade 5 will replace the original spiders in your 600s.
Question 4 (Thread 2): The 600s use a ball bearing supporting the top of the input shaft, inside the housing (like an 820 transaxle), with a bronze bushing below the ball bearing. The grease zerk is a good-idea modification. Peerless input-shaft bushing and bearing Part Numbers: Bronze - 780061; Ball - 780093 (all except plain 612, including 612A), 780092 (plain 612). Bearings and bushings are still available. Your "steel bushings" are not original. Are these bushings or needle bearings?
Closely inspect all remaining bearings and bushings when prepping a transaxle or transmission. Replace any worn or questionable items.
Final Note: As more of the 600's parts become obsolete due to its age, you might want to plan on replacing your transaxle at some point with an MST 200. It's not only more current and more popular, but its inline-shift pattern also makes it easier to shift and it's available with up to six speeds.