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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

JCB 3CX Shtttle Box Oil

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bigrob

04-11-2006 12:49:31

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Well, I've finally found an operator's manual for my 1982 3CX (thanks to The Digger Doctor- what a guy!)

However, I'm wanting to top up/change the oil in the shuttle box, and here begins the confusion-

The original operator's manual says to use Mobil Delvac 1310 (basically 10W monograde engine oil)

The man at JCB technical support said to use Gear Oil 90 (API-GL-5)

The operators manual for a 1994-ish 3CX says to use JCB Special Transmission Fluid (and under no circumstances Dexron ATX)

Anybody any idea what oil I should actually use?
I've read the past posts on here where folk say to use Dexron ATF, I'm just a bit put off by the dire wanrings against it by JCB!

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jrv1956

04-18-2006 06:49:34

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Re: JCB 3CX Shtttle Box Oil in reply to bigrob, 04-11-2006 12:49:31

First of all, what are you calling the shuttle box? It sounds to me that you are confused about which oil goes where? The borg-warner shuttle, (the first box behind the torque converter housing) is filled through the top and checked with the dipstick. It is filled with Dextron ATF. JCB does say not to use Dextron due to some of the seal problems that they have had with the convertor and front pump. Dextron will work just fine. In the transmission box, the second housing past the converter, is 90 wt gear lube. This is just a simple gear transmission and is seperated from the shuttle. If you have the newer transmission, the synchro-shuttle where all you have is one large case, you HAVE to use the JCB oil. Dextron will not seal properly and you will have internal leaks on the clutch packs. You first have to know which you have, the borg-warner with the gearbox or the JCB synchro shuttle. Then you can proceed. The tech's at JCB are just ignorant. Most of them read from a book and have never even seen a backhoe. I should know, I was a service manager at a JCB dealership for many years. BigJ

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Aae

09-24-2006 04:05:04

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Re: 1997 JCB 3CX transmission problems in reply to jrv1956, 04-18-2006 06:49:34

This machine was working fine, parked off for the night, checked oil in the morning found oil to on min mark on dipstick. Oil was topped and machine sent to site. Worked for an hour and the operator noticed a delayed response when the forward/reverse shift was selected. We drained all oil from gearbox, renewed filter and checked the strainer and filled the recommended oil to the max mark. The delayed action persists.
Response time is about 5 seconds. Can somebody please help.

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bigrob

04-19-2006 10:45:04

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Re: JCB 3CX Shtttle Box Oil in reply to jrv1956, 04-18-2006 06:49:34

I've got the BW shuttle box & seperate gearbox. What caused the confusion was the original JCB Operator's Manual I have which states-
10w engine oil (mobil Delvac 1310, the same as the engine in cold climates) as the stuff to use in the shuttle box. 20W/20 engine oil as the stuff to use in the 4 spd synchro box.
In the end, I've got a 25l drum of JCB shuttle transmission 10w oil, as it's no more expensive that ATF anyway!

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ajk

04-11-2006 13:21:28

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Re: JCB 3CX Shtttle Box Oil in reply to bigrob, 04-11-2006 12:49:31

Don"t get confused between the transmission oil and the shuttle box fluid,red ATF for the Borg Warner shuttle box for your 3CX,buy your oils at a JCB dealer they are very good on price and their oils are top quality and you will get the right one.
AJ

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