jon123 · Jun 30, 2012

sorry you are right i actually have NTC 1582 per the photos above (PAS box) and the arm showing is RTC6398 which is the one i have -

jon123 · Jun 30, 2012

so with a few whacks i got arm on this far (see pics) and will probably got 1-2mm more when tightened fully but still be 4-5mm short of where the old arm was. Any ideas is this enough ? ?

jamesmartin · Jun 30, 2012

not quite right ,and are you sure its on the right master spline

jon123 · Jun 30, 2012

yep think so there are 3 wider key ways at 3 6 and 9 o'clock which mean it can only go on the way it is because otherwise when the box is in the truck the arm would foul and wouldn't move full lock - have checked the old arm which is still in one piece despite the fact i cut it to remove and that goes on all the way - baffled. i have also checked other new arms all the same

jamesmartin · Jun 30, 2012

is it possible to take box in and try arms in the shop ?

jon123 · Jun 30, 2012

yep did that last week took to craddocks near stafford arm they gave me was the same , bloke there said they press the arms on but suggested i fit box and jack up under the arm and that would do the trick - needless to say it didnt which is whats baffling me because i am sure these should go on easier even though they are a tapered fit.

jamesmartin · Jun 30, 2012

ive reconned and fitted hundreds and not yet have had to press arm on ,measure top and bottom of taper on arm and shaft i will have a look on monday

jon123 · Jul 1, 2012

ok so i got the arm on this far see pictures - full nut engagement but didnt go as far as the old one. if i tightened more on the vehicle i am sure the thread will strip. What does anyone think, it certainly isnt coming off

johnlad · Jul 1, 2012

jon123 said:
ok so i got the arm on this far see pictures - full nut engagement but didnt go as far as the old one. if i tightened more on the vehicle i am sure the thread will strip. What does anyone think, it certainly isnt coming off

it doesnt look to be on far enough, are the splines damaged on the box or arm

jon123 · Jul 1, 2012

splines on box look fine and old arm goes up 4mm more without a fight. have tried 3 new different arms now and this one was the only one that went near.

saxmanuk · Jul 1, 2012

jon123 said:
have attached pics of the PAS box which i believe to be a Gemma 6 bolt and have the right arm that doesnt fit. also does any one have a good link to a site showing how to fit the ball joint in the drop arm

Busters guides are on this site mate

http://www.landyzone.co.uk/lz/f41/drop-arm-ball-joint-renewal-63811.html

ER1C · May 2, 2013

Did you resolve this ? I ask simply as I have the same problem, I have some spline damage and was about to file them straighter but after reading this thread I think its the same issue.

ER1C · May 4, 2013

et voila

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