RandyLittrell 3,877 #1 Posted May 25, 2023 I picked up a 78 C-81 according to the fellow I bought it from and it came with a 36" deck. I see no tag or serial number on it and wondered if you guys could help me identify it? Thank you!! Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,019 #2 Posted May 25, 2023 It will be one of these Mower DNA 1972 model 5-0620 replaced by 1973-1974 model 5-0621 1975 model 5-0622 1976 model 65-36XR01 1977 model 75-36XR01 1977 model 75-36XR02 1978 model 85-36MR01 1979 model 95-36MR00 (Blades up to this point have the 5/8" x 3/4" double-D center hole unless the spindle has been upgraded) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- (These decks used blades with a 3/4" center hole) 1979 model 95-36MR01 replaced by 1980-1982 model 05-36MR01 - Last year for bearings with 3/4" ID 1983-84 model 05-36MR02 - First year for bearings with 17mm ID unless older spindles were updated. 1985 model 05-36MR03 1986-1990 model 05-36MR04 1991-1993 model 05-36MR05 1993-2006 model 78305 Note - 17mm is .669" 3 Share this post Link to post Share on other sites
RandyLittrell 3,877 #3 Posted May 25, 2023 38 minutes ago, gwest_ca said: It will be one of these Mower DNA 1972 model 5-0620 replaced by 1973-1974 model 5-0621 1975 model 5-0622 1976 model 65-36XR01 1977 model 75-36XR01 1977 model 75-36XR02 1978 model 85-36MR01 1979 model 95-36MR00 (Blades up to this point have the 5/8" x 3/4" double-D center hole unless the spindle has been upgraded) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- (These decks used blades with a 3/4" center hole) 1979 model 95-36MR01 replaced by 1980-1982 model 05-36MR01 - Last year for bearings with 3/4" ID 1983-84 model 05-36MR02 - First year for bearings with 17mm ID unless older spindles were updated. 1985 model 05-36MR03 1986-1990 model 05-36MR04 1991-1993 model 05-36MR05 1993-2006 model 78305 Note - 17mm is .669" It appears to be this one......1978 model 85-36MR01 Thank you for help!! Share this post Link to post Share on other sites
Tug 7 #4 Posted July 28, 2023 I'm curious about the truck in the back ground. 1 Share this post Link to post Share on other sites
peter lena 8,564 #5 Posted July 29, 2023 @RandyLittrell would take advantage of the solidity of it , personally , would get an oil soak going into the bottom side , to kill off grunge and prepare it for a black grease spray down , while you are rebuilding , up greasing those spindle bearings , and relayed idler pulley ..obvious rear wheel attatchment areas . used a 36 r/d for years , guy I sold it too , could not believe , how quiet / solid it was . also add an idler pulley to the back side of the deck belt unsupported area , pushing against the bounce srea. lucas green grease in every bearing , also in muel drive bearings , pto inner needle bearing . high heat 550 deg , polyurea , anti sling , makes those bearings live without effort . hi heat and angular stress is what kills , deck / muel drive bearings . just a suggestion , while you are right there , deck belt drive spins by hand . you can,t do that , pete 1 Share this post Link to post Share on other sites
RandyLittrell 3,877 #6 Posted July 30, 2023 (edited) On 7/29/2023 at 8:43 AM, peter lena said: @RandyLittrell would take advantage of the solidity of it , personally , would get an oil soak going into the bottom side , to kill off grunge and prepare it for a black grease spray down , while you are rebuilding , up greasing those spindle bearings , and relayed idler pulley ..obvious rear wheel attatchment areas . used a 36 r/d for years , guy I sold it too , could not believe , how quiet / solid it was . also add an idler pulley to the back side of the deck belt unsupported area , pushing against the bounce srea. lucas green grease in every bearing , also in muel drive bearings , pto inner needle bearing . high heat 550 deg , polyurea , anti sling , makes those bearings live without effort . hi heat and angular stress is what kills , deck / muel drive bearings . just a suggestion , while you are right there , deck belt drive spins by hand . you can,t do that , pete Thanks Pete! I did do an oil soak top and bottom. Spindles seem to be sealed, no zerks. It is nice and quiet and mows nice and I am sanding down the guards to throw some paint on those currently. Very happy mowing with it, even if I do have a small yard. I just can't do the push mower and just love mowing with my 1985 310. Randy Edited July 30, 2023 by RandyLittrell 1 Share this post Link to post Share on other sites
