Qld Rod

welcome it's all down hill from hear. 😊 thanks for the nice pics looks like some nice toys. i not too smart on your problem but i sure someone will pipe up for you. if you have the serial Number handy it will help with your problem.

Hello Maddad64 , Presume you are in QLD ! So tell us Where ,,If are you in the South east corner come to Allora Rally this Weekend , There will be as far as I know an RD6 there and the Owner has Much Experience with Them, and D4's also , I can't definitely answer Your Question on interchange ,But fairly certain that 955 Chain would be Longer .Chapter 18 has a Meeting at Allora on Sunday @8.30 am, You are more than Welcome . LJ

My RD6 here in SE Qld has U series D6 chains on her ,, fit perfectly .. Good Luck pete

Welcome to ACMOC Maddad, early D4 chains will fit the RD6 with extra links added provided the bottom and top rollers have been changed to the narrower D4 size, the 955 runs D6 size chain, my "good" RD6 had D4 chains on her when I dragged her home but she is now fitted with proper RD6 chains, sprocket pitch was the same.
Good luck
Mike

I am in the central Qld area. I've had the RD6 for over ten years now and doubt I'll ever part with it. I'm away from the machine on shift at the moment and will post the serial number when next looking at it, (There was once a time I knew it by heart). Thanks for all the advice and invites. I'm interested to know if any mods are needs to fit the D6U chains on the RD6 and what model, and any mods required for the D6 chains onto the 955k?

Hi, Maddad64.
I'm no expert but I thought the 'R' was dropped form the model designations in 1937. If you can post the serial # when next you visit the machine, some of the exremely learned gentlemen on here will be able to give you a year of manufacture and whether it is 'ackshully' an 'R'D6.

Just my 0.02.

Welcome to the Forum Mate . I am in Central QLD ,near Gladstone .Once you get your serial number i found this info .2H 3247 Was the Start of the D6 designation .So means anything lower than 3247 was an RD6 .
As for the machine locking up in reverse It could be a Bearing collapsed in the final drive .
We bought a Cat 22 , and it was driven on to the truck . When i got it home ,I tilted the tray and went to let it go down the tray with the winch rope ,.Only went a couple of feet ,and stopped rolling . Had to drag it off . .Found the pinion bearing had collapsed and the balls jammed things up .

Sounds like a final drive bearing failure to me, drain them down and see how much shrapnel comes out, the D4 chains will not fit the 955K, 955 changed to D6 chains with the 955E (12A) then to 6.91" (D5?)pitch with the 955H and then to heavy duty 8" pitch D6 late in the 955K range, or was it with the 955L. If you want more detail I will get my old CTS book out.