EasternOT 3 #1 Posted August 8, 2024 Hello guys, I recently picked up this 48” deck and need to order some parts including a new drive pulley for one of the outer spindles. I can’t figure out the model number for this deck but I know it’s not a 78360/78361 due to It having the older design of the trailing wheels and how they’re mounted. Does anyone have an idea on the model It could be? Also I noticed that there seems to be two different part numbers for the outer drive pulleys depending on the year of the 48” deck. One part number is 106074 & the other is 110146. Do these pulleys interchange with each other? The 106074 is twice the price hence why I’m asking. Thanks! Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,450 #2 Posted August 8, 2024 Here is a complete list of the decks Mower DNA 48" side discharge 1966-1967 model RL-486 replaced by 1968 model 5-1481 1969 model 5-1482 1970 model 5-1483 1971 model 5-1200 1972 model 5-1201 1973 model 5-1202 1973-1974 model 5-1210 1975 model 5-1211 1976 model 65-48MS01 1976 model 65-48MS02 1977 model 75-48MS01 - These all used blades with 5/8" x 3/4" double-D center hole unless the spindles have been upgraded. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Note - 3/4" or .750" is 19.05mm 1977 model 75-48MS02 - Uses 6203 bearings with 3/4" ID - (First deck to use blades with 3/4" center hole) - Originally had a nylon-insert nut holding spindle pulley on. 1978 model 85-48MS01 - Uses 6203 bearings with 3/4" ID - Originally had a nylon-insert nut holding spindle pulley on. 1979 model 95-48MS00 - Uses 6203 bearings with 3/4" ID - Originally had a nylon-insert nut holding spindle pulley on. 1979 model 95-48MS01 - Uses 6203 bearings with 3/4" ID - Originally had a nylon-insert nut holding spindle pulley on. 1980 model 05-48MS01 - Uses 6203 bearings with 3/4" ID - Originally had a nylon-insert nut holding spindle pulley on. 1981-1983 model 05-48MS02 - Uses 6203 bearings with 3/4" ID - Originally had a nylon-insert nut holding spindle pulley on. 1984 model 05-48MS03 - Uses 6203 bearings with 3/4" ID - Originally had a nylon-insert nut holding spindle pulley on. Note - 17mm is .669" 1985 model 05-48MS04 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1986-1988 model 05-48MS05 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1987-1988 model 05-48SC01 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1989 model 15-48SC01 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1990 model 15-48SC02 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1991-1992 model 15-48SC03 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1993-1997 model 78360 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1998-2007 and 2009-12 model 78361 - Uses 6203 bearings with 17mm ID - (These all use blades with 3/4" center hole) - Originally had a standard nut and lockwasher holding spindle pulley on. 1 Share this post Link to post Share on other sites
EasternOT 3 #3 Posted August 8, 2024 56 minutes ago, gwest_ca said: Note - 17mm is .669" 1985 model 05-48MS04 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1986-1988 model 05-48MS05 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1987-1988 model 05-48SC01 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1989 model 15-48SC01 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1990 model 15-48SC02 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1991-1992 model 15-48SC03 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1993-1997 model 78360 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. 1998-2007 and 2009-12 model 78361 - Uses 6203 bearings with 17mm ID - (These all use blades with 3/4" center hole) - Originally had a standard nut and lockwasher holding spindle pulley on. Just to clarify, if my spindle measures 17mm OD then it’s likely 1985+. Do you know which year they changed from having the rear trailing wheels on the same rod to them having separate brackets for each wheel. Was It when model 78360 started? Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,450 #5 Posted August 8, 2024 I do not know. Would have to compare parts lists which can be done here https://www.partstree.com/search/?msclkid=e5baf37065dc11af43e5a9808bdc6a14 Often the online 48" parts lists share one with a 42" deck so keep that in mind. If we have an original parts list they are accurate. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,450 #6 Posted August 8, 2024 Note - 17mm is .669" 1985 model 05-48MS04 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. Single rear shaft for 2 rollers 1986-1988 model 05-48MS05 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. Single rear shaft for 2 rollers 1987-1988 model 05-48SC01 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. Single rear shaft for 2 rollers 1989 model 15-48SC01 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. Two rear shafts for 2 rollers 1990 model 15-48SC02 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. Two rear shafts for 2 rollers 1991-1992 model 15-48SC03 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. Two rear shafts for 2 rollers 1993-1997 model 78360 - Uses 6203 bearings with 17mm ID - Originally had a standard nut and lockwasher holding spindle pulley on. Two rear shafts for 2 rollers 1998-2007 and 2009-12 model 78361 - Uses 6203 bearings with 17mm ID - (These all use blades with 3/4" center hole) - Originally had a standard nut and lockwasher holding spindle pulley on. Two rear shafts for 2 rollers Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,450 #7 Posted August 8, 2024 A shared 42-48 parts list likely has different pulleys to get to the required blade tip speed but fails to tell us what uses what. Share this post Link to post Share on other sites
EasternOT 3 #8 Posted August 8, 2024 1 hour ago, gwest_ca said: A shared 42-48 parts list likely has different pulleys to get to the required blade tip speed but fails to tell us what uses what. It took me a while to figure out what you meant by this but I finally understand. In the schematics it shows two different part numbers for the drive pulley since the schematic for the spindle assembly is covering both the 42" & 48" version even though the title only says 42". Share this post Link to post Share on other sites
EasternOT 3 #9 Posted August 8, 2024 The 1977-1984 decks (42" & 48") had different drive pulley part numbers than the 1985+ decks; This correlates to when they switched from the nylon insert locknut to the lock washer & nut design. From what I've gathered by studying the part numbers in the schematics... - The 1977 - 1984 Decks used drive pulleys 106072 (42") & 106074 (48") - The 1985+ Decks used drive pulleys 109967 (42") & 110146 (48") - 1989+ Decks used 2 separate mount brackets for each of the 2 rearward rollers Therefore 110146 should be the correct part number for my drive pulley as my deck appears to be in the year range of 1985-1988. Thank you @gwest_ca this was a fun little research project. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,450 #10 Posted August 8, 2024 45 minutes ago, EasternOT said: It took me a while to figure out what you meant by this but I finally understand. In the schematics it shows two different part numbers for the drive pulley since the schematic for the spindle assembly is covering both the 42" & 48" version even though the title only says 42". Exactly. An original parts list would have part numbers on the left - part description next and 2 columns on the right - one for 42" decks and the last 48" decks. An X was placed in the last two columns to identify what deck the part was used on. Toro never came up with a way to make it work. Some lists are separated - you will see an item #6 near the top and another item #6 at the bottom along with other duplicated items - top for one deck and bottom for the other using the same item number. That is at this site https://lookup3.toro.com/partdex/index.cfm?xCaller=Toro Share this post Link to post Share on other sites
