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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

JCB 214 Sitemaster Powershift Transmission

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Bob King

05-06-2007 18:40:28




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Hi,
Anybody here familiar with a 1993 JCB 214 Sitemaster Powershift transmission. Just bought this machine and it pulls good in all speeds except 2nd in Forward. Odd to when you have all four wheels off the ground they spin forward in igh even with the shifter in nuetral. Put the shifter in reverse and the all the wheels lock down, go back to nuetral and they spin forward again. Almost like the solenoid isn't centering. When using the machine it seems like it takes more power to backup than go forward. Mostly concerned with the slippage in second gear. Any ideas would be appreciated. Thanks, Bob

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AJK

05-07-2007 03:37:34




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 Re: JCB 214 Sitemaster Powershift Transmission in reply to Bob King, 05-06-2007 18:40:28  
Pull the dipstick and smell the fluid,if it smells of burnt brake linings it is possible that a clutch pack is in trouble,you are explaining two different problmes,the first problem of not enough power in second could be that clutch pack is slipping due to the solenoid valve not opening fully allowing full pressure to engage the clutch or worn clutch discs,the other problem of the forward clutch been engaged when in neuteral could be electrical or a disc in the forward clutch pack has cracked and a piece got between the other discs causing it to want to drive all the time,on top of the transmission there are the solenoid valves,one bank is for forward and reverse the others for the speeds,with the engine off and the ignition on (disconnect the buzzer) get a second person in the seat to move the F/R switch from neuteral to forward,put your finger tips on the solenoid valves,when you find the one (you will feel it jump) for forward take the plug off and see if the wheels are still driving forward,if they are the trouble is inside,if not you have electrical trouble,the F/R switches do fail,the solenoid valves are spring loaded to close,did not see any trouble from them,in general the transmissions gives good service,but the switches like all switches wear out.
Good Luck
AJ

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ed byers

09-04-2007 14:37:30




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 Re: JCB 214 Sitemaster Powershift Transmission in reply to AJK, 05-07-2007 03:37:34  
Mr. Kirby,

I would love to discuss brakes and transmission on a 3cxt, 1986 4x4, extend-hoe, shuttle shift. I tried your email address with no luck.

Ed



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Bob King

05-07-2007 06:08:16




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 Re: JCB 214 Sitemaster Powershift Transmission in reply to AJK, 05-07-2007 03:37:34  
Appreciate the reply AJ. I didn't want to post to lengthy of a message so I'll catch you up on what I have done so far. The oil does not smell burnt and I went ahead and changed the filter and oil and checked the screen. Found just a small coating of super fine metal sludge on the magnet on the drain plug. Nothing in the screen. I agree with the two different problems. I took the switch off first and trouble shot it with a ohm meter. Works perfect. I have disconnected the switch cannon plug with all four wheels off the ground with the tires turning forward and it had no effect, still wants to run high speed forward. Switch is OK. On this machine it has 6 solenoids. High and Low Forward on one valve, High and Low Reverse on second valve, Main and Lay shaft(Low speed)on the third valve. In operating the machine, either normally or tires off the ground, all appear to function. Best I can tell the high forward solenoid is stuck on a little but the other valves over ride it. With the machine off the ground I can actually stop the wheels by hand so it's not much force. Just so odd to me that in nuetral or forward it spins the tires forward and in reverse at idle it locks them down. If I throttle up a little the tires do run in reverse but stop like the brakes are on when idling again. I am coming to the conclusion that the probem is in either the forward valve body sticking or in the transmission itself. Any ideas would be appreciated. Thanks, Bob

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AJK

05-07-2007 13:35:42




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 Re: JCB 214 Sitemaster Powershift Transmission in reply to Bob King, 05-07-2007 06:08:16  
You have done the right tests,you could remove the solenoid valves and have a look at them,I think that two of the double ones are the same so try swopping them,I have no literature on that tranny,the wheels spinning when off the ground and you can stop them by hand might be just the inertia momentum of the drive train,keep the parking brake on for a day while digging with a gear selected and and the F/R in neuteral,it might free up,not much more I can say about second except a pressure check before any tear down,there should be a snap on test point near the filter,usually has a plastic cap on it.
Good Luck AJ

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Bob King

05-07-2007 18:20:08




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 Re: JCB 214 Sitemaster Powershift Transmission in reply to AJK, 05-07-2007 13:35:42  
Hi AJ,

Good news is that after changing the oil and filter and operating the F/R over and over, especially running in Reverse in 4th gear wide open the valves are beginning to work right again. I believe they will be ok with some use. As for second gear it still slips. My service manual shows several checks to be done but some of them require special fittings to go on the filter mount. I'll have to try and get some gauges and hoses together and start checking. The machine is usable and 2nd will pull on level ground. But it needs to be addressed. Thanks for the help. Bob

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AJK

05-08-2007 14:42:30




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 Re: JCB 214 Sitemaster Powershift Transmission in reply to Bob King, 05-07-2007 18:20:08  
That was a good result,maybe the 2nd clutch piston is sticking a little and might free up after some use,hope it works out for you.
Regards AJ



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