harryt 36 #1 Posted April 30, 2017 Hi everyone, I am in the middle of my D200 restoration. It was a basket case when I got it and most of the hydraulic system was taken apart. Now I have reassembled most of the hydraulic system, but for some reason the rear wheels will not budge. Has anyone got any ideas, I have fiddled with the screw on the hydraulic motor but no luck. Any ideas? thanks Share this post Link to post Share on other sites
pfrederi 17,028 #2 Posted April 30, 2017 Can you roll the tractor a distance? Did you have the transaxle apart and check it? Could be a broken differential bolt jamming the bull gear. Does the midmount (or 3 pt ) lift work? What screw on the hydro motor are you talking about?? The Tow valve is on the hydro pump. Share this post Link to post Share on other sites
harryt 36 #3 Posted April 30, 2017 The tractor rolls about 5cm. I did not have the axle apart but it did roll before I got it. I have not yet connected any of the rams yet for the hydraulic lifts. Share this post Link to post Share on other sites
pfrederi 17,028 #4 Posted April 30, 2017 (edited) Did you open the tow valve? Do you have the later model with a band parking brake on the hydro motor or the older model with internal parking pawl? Also Where is your parking brake handle is it like this one (2-4 pic) Edited April 30, 2017 by pfrederi Share this post Link to post Share on other sites
harryt 36 #5 Posted April 30, 2017 Not sure on the parking brake handle as it was not assembled when I got it and I haven't got that far yet, but I am pretty sure it is like that one Share this post Link to post Share on other sites
pacer 3,159 #6 Posted April 30, 2017 By "wont roll" clarify this a bit - is this when you try to push/move the tractor? or with wheels raised wont move? As mentioned if tow valve isnt turned the tractor will only move maybe 6-10 inches. But since tractor was apart I wonder if it just might be what pfred mentioned about the diff bolts, if one of them comes loose (which was common on some of the earlier D;s) then that will lock up everything. Share this post Link to post Share on other sites
pfrederi 17,028 #7 Posted April 30, 2017 What model number is the unit. That would clarify about the Parking brakes type and linkages as they changed over time. Share this post Link to post Share on other sites
harryt 36 #8 Posted April 30, 2017 This was it when it was altogether when the previous owner had it but he took it apart. Looks like it has the same parking break you are talking about? What bolt could be broken? Share this post Link to post Share on other sites
ericj 1,576 #9 Posted April 30, 2017 those hydro's won't push unless you turn the push tow valve on the side like mentioned above. will it not move with the motor running or off ? eric j Share this post Link to post Share on other sites
pfrederi 17,028 #10 Posted April 30, 2017 The tow valve is in the black hole about in the middle of the picture. it must be loosened about a turn to allow you to push the tractor. Your parking brake control is like the one in the pictures I posted. The possible broken bolt is in the transaxle differential. With both rear wheels up i the air try turning one of them what happens? does the other wheel turn the opposite direction??? Look at this parts manual Check the lever 4-34 does it move when you move the parking brake handle?? The broken bolt would be one of 4 like I circled. 1 Share this post Link to post Share on other sites
harryt 36 #11 Posted April 30, 2017 When I jack it up, one wheels turns one way and the other wheel in the opposite direction. It is not fully assembled but I would of thought it would still turn? Share this post Link to post Share on other sites
pfrederi 17,028 #12 Posted April 30, 2017 From the pictures I assume you have no fluid in the system. That eliminates the tow valve as an issue. Can you move the parking pawl lever? (Blue Circle) Then try turning the wheels again Share this post Link to post Share on other sites
harryt 36 #13 Posted April 30, 2017 I have put fluid in the transmission but obviously it is not primed. Yes I can move that lever Share this post Link to post Share on other sites
pfrederi 17,028 #14 Posted April 30, 2017 try spinning both wheels same direction with the lever moved all the way forward....then try with it all the way back Share this post Link to post Share on other sites
harryt 36 #15 Posted April 30, 2017 I have tried that but still no luck Share this post Link to post Share on other sites
pfrederi 17,028 #16 Posted April 30, 2017 Can you move both rear wheels backward at the same time?? Do you think the parking pawl is moving with the lever?? If you try spinning the wheels while you move the lever is there and grating/gear clash noise? Share this post Link to post Share on other sites
ericj 1,576 #17 Posted April 30, 2017 these tractor have an OPEN rear not a posi, so one wheel will turn the opposite direction of the other eric j Share this post Link to post Share on other sites
pfrederi 17,028 #18 Posted April 30, 2017 If it isn't the parking brake the it is either a gear issue in the transaxle (jammed by a broken bolt etc.) or something amiss with the hydro motor itself. I hate to say but you may have to pull the hydro motor and see if the wheel spinning issue resolves. You will also be able to see the parking pawl with the hydro motor off. If it still will not roll with the hydro motor off I am afraid you will have to split the transaxle case to locate the problem sorry 2 minutes ago, ericj said: these tractor have an OPEN rear not a posi, so one wheel will turn the opposite direction of the other eric j He can't spin them in the same direction at the same time and it won't roll with both wheels on the ground Share this post Link to post Share on other sites
harryt 36 #19 Posted April 30, 2017 In my opinion it can't be anything serious due to it was fine before and I have not done anything to it other than painting it. Do you think oil in the system will make any difference? Share this post Link to post Share on other sites
pfrederi 17,028 #20 Posted April 30, 2017 Your first post mentioned reassembling the hydro system...Did you have the hydro motor out? Did its gear shaft rotate OK before you put it back in?? Oil in the system will not make any difference D's are hard to push but if you can't rotate both wheels in the same direction at the same time up in the air something is wrong. Share this post Link to post Share on other sites
harryt 36 #21 Posted April 30, 2017 By the hydro motor do you mean the bit on the side on the transmission? Share this post Link to post Share on other sites
pfrederi 17,028 #22 Posted April 30, 2017 2 minutes ago, harryt said: By the hydro motor do you mean the bit on the side on the transmission? Yes In the first post you also mentioned a set screw on the hydro motor...which one?? Share this post Link to post Share on other sites
harryt 36 #23 Posted April 30, 2017 I mean the one on the engine, I have not had that one apart Share this post Link to post Share on other sites
pfrederi 17,028 #24 Posted April 30, 2017 (edited) To be sure, the hydro pump has the tow valve and it is the part connected to the engine, that valve need to be loosened at least a turn . The hydro motor goes in the side of the transaxle. Did the gear shaft on that turn fairly easily before you put it back in the transaxle? To prevent the rear wheels from turning in the same direction at the same time either the hydro motor is building up pressure (which since the system isn't filled and the manifold lines to the pump are not filled building pressure would seem to be impossible) or something in the hydro motor is broken and or jammed. The other possibility is something in the transaxle itself like a broken bolt or the parking pawl is stuck. Edited April 30, 2017 by pfrederi Share this post Link to post Share on other sites
harryt 36 #25 Posted April 30, 2017 Ok, I will investigate it further, many thanks for your help Share this post Link to post Share on other sites