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jim sunnus 07-28-2012 03:58:01 64.180.192.74 Report to Moderator	Hello. Our 970 has a problem in that when the trans oil is warm or hot ,the inching pedal engagement is very extreme.When it is cold, the tractor acts like any standard transmission in that you can engage slowly & smoothly. I took some pressure readings & got lube-62 @idle & 75 @ 2000rpm,the readings @c1,2,3&4 were all 185 @ idle & 200 @ 2000rpm. If you push the pedal past what would be called free travel on a clutch,C1 drops a few psi & oil flow can be heard through the valve. If anyone can direct me to where I can look to remedy this violent engagement it would be appreciated.. Thanks Jim S [Reply]   [No Email]
jim sunnus 08-03-2012 12:30:03 64.180.192.74 Report to Moderator	Re: 970 in reply to jim sunnus, 07-28-2012 03:58:01   Hello. I checked the springs & they are intact.It was mentioned in one reply that I could narrow down the leaking clutch using a flow meter. Could you tell me where to hook it up & what flow I can expect to find. Thanks for all your help Jim S   [Reply]  [No Email]
mEl 08-03-2012 14:44:25 108.10.129.170 Report to Moderator	Re: 970 in reply to jim sunnus, 08-03-2012 12:30:03   jim sunnus said: (quoted from post at 12:30:03 08/03/12) Hello. I checked the springs & they are intact.It was mentioned in one reply that I could narrow down the leaking clutch using a flow meter. Could you tell me where to hook it up & what flow I can expect to find. Thanks for all your help Jim S A flo meter plugged into the remote couplers is easy, keep the load valve set lower than the pressure that the spool holding plungers kick out at or tie the remote on with a tarp strap, lock the remote that supplies the coupler on the inlet side of the flow meter and read the flow in each range, reverse and clutch down. A significant drop in flow to the remote in a particular range indicates that the flow divider is sending more oil to the power shift to make up for internal leakage in the clutches involved in that range, by knowing the clutch combinations you can easily zero in on the faulty clutch. Copy the following, c1-c2 = 1 power shift----c1-c3=2 power shift-----c2-c3=3rd, Clutch down=c4 and r=c2=c4. Check the flow in each of these ranges and write them down and by comparing between ranges the leaky clutch can be isolated. Use the flow meter to warm the oil to get a hot oil test as that is more meaningful, oil at 150 to 180 should be good, running the hydraukics against a load will warm it up fairly quickly. Write or print off the above info as it will serve you well as you test. m This post was edited by mEl at 14:45:46 08/03/12.   [Reply]  [No Email]
jim sunnus 07-29-2012 21:02:27 64.180.192.74 Report to Moderator	Re: 970 in reply to jim sunnus, 07-28-2012 03:58:01   Thanks for the help. Do I have to remove the valve to check the springs you mentioned or can I do it in place ? Thanks Jim S   [Reply]  [No Email]
mEl 07-30-2012 03:46:33 96.249.140.201 Report to Moderator	Re: 970 in reply to jim sunnus, 07-29-2012 21:02:27   Quoting Removed, click Modern View to see In place, thoroughly clean the PS control valve area and especially the rear area, The springs and modulating point are at the rear end of the clutch spool and removing the plug there will give access to them, They usually come right out as the plug is removed if done carefully, bring the plug straight out and they may stay right on the roll pin that they ride on. The assembly used to be available as a kit, get with a reputable old Case dealer who has a good parts person if you need help.   [Reply]  [No Email]
1370rod 07-28-2012 05:14:13 69.179.26.71 Report to Moderator	Re: 970 in reply to jim sunnus, 07-28-2012 03:58:01   Theres a bunch of good repair guys that read this forum so I'm sure someone will nail your problem. My guess when you say inching pedal is extreme asuming you mean engages harshly when the pedal is just about all the way up after oil is warm would be 1 of 2 things. The spool controlled by the pedal has 2 spings under it. one heavier and a very light one seperated by a washer. The light one does compress with age, break or be slid up into the big one if washer is missing. Any one of those could cause that problem. Also if you had a small oil leak in the P. S. itself. The pedal controls oil feeding the P.S. when starting out and until the pedal is about 3/4 of the way up is fed through a 2 gpm. orfice. If the leak is greater than 2 gpm after the oil is warm (thin oil) the tractor will not move until the pedal is just about all the way up because then it picks up full pump flow and will engage harshly. This problem is ussually corrected by repairing the P.s. Rod.   [Reply]  [No Email]
mEl 07-28-2012 06:46:45 71.241.102.73 Report to Moderator	Re: 970 in reply to 1370rod, 07-28-2012 05:14:13   Quoting Removed, click Modern View to see I agree wholeheartedly with Rod, the modulating plunger could be the problem and easy to check. More than likely the Power shift needs attention and if so I would pay the extra to update to the later style clutch pistons if not so equipped. If you have access to a flow meter you could zero in on the leaky clutch that is most likely the problem. mEl   [Reply]  [No Email]