S416-8 345 #1 Posted Monday at 11:06 PM Was suggested to me that I should pull and take the trany on the new to me 18 automatic apart before putting it into service. As this is something I am not afraid of doing but it is something that I have not done. Is there any literature available.. looking through the manuals now. Thanks Share this post Link to post Share on other sites
953 nut 56,781 #2 Posted Tuesday at 12:25 AM Here are a couple you should find helpful. Share this post Link to post Share on other sites
S416-8 345 #3 Posted Tuesday at 12:28 AM thanks and now maybe I am a bit in an ugh stage.. what are the 4-bolts they are talking about Share this post Link to post Share on other sites
S416-8 345 #4 Posted Tuesday at 12:55 AM may need a bit of help on this one... no press,, never took on a trany before.. Share this post Link to post Share on other sites
daveoman1966 3,768 #5 Posted Tuesday at 01:09 AM 8 minutes ago, S416-8 said: may need a bit of help on this one... no press,, never took on a trany before.. There are, essentially, two types of Auto trannies in WH products... the Hydro-Gear type and the later Piston-to-Piston type. Your 1973 18hp Auto has the latter style...piston-piston and it is Sundstrand model 90-1137. I have prepared an 'overhaul' manual to show the how-to refurbish this...with pics and narrative. Here is the FREE .pdf file for you...and anyone else. SUNDSTRAND Piston-Piston PUMP & MOTOR Refurb.pdf Share this post Link to post Share on other sites
S416-8 345 #6 Posted Tuesday at 01:14 AM thanks a ton... going to be a process Share this post Link to post Share on other sites
oliver2-44 10,091 #7 Posted Tuesday at 01:54 AM Why were you suggested to take it apart? The usual 1st test is to chain it to a tree or solid object. If it can spin the tires forward and reverse, its a good hydro. That my Share this post Link to post Share on other sites
S416-8 345 #8 Posted Tuesday at 02:03 AM Being new to the D's and not knowing anything about them, another member said that I should, if I plan on using it as a tractor, pull the trany and go through it to make sure there are no issues. Probably jumping too fast and too high because I just got the tractor to run for short spurts so I'm still waiting on the fuel pump so it will stay running. As soon as it does it will strap it to the tree and see if I can spin the tires.. thanks for that advice and will strap my feet to the ground so I don't jump so fast.. Share this post Link to post Share on other sites
S416-8 345 #9 Posted Tuesday at 02:08 AM Odd but I am already look forward to the Big Show to do some "D" scavenger hunting Share this post Link to post Share on other sites
oliver2-44 10,091 #10 Posted Tuesday at 02:56 AM FYI If you find it strong and fast in one direction but not the other go through the manual and do the maintenance and adjustment on the motion control linkage before you jump to an actual transmission problem. 1 Share this post Link to post Share on other sites
stevebo-(Moderator) 8,382 #11 Posted Tuesday at 12:10 PM I did this year ago on mine. Bigger job but if the case breaks you have an even bigger job. I bought my auto 18 with sheared bolts and they pushed through bottom of case. BEFORE you start check to make sure it is not already broke and repaired by others using weld or braze. good luck! 1 Share this post Link to post Share on other sites
S416-8 345 #12 Posted Wednesday at 06:23 PM Just got under the machine and there are no repairs that I can see anywhere.. Share this post Link to post Share on other sites
