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Cavalier43
Jul 12, 2013, 02:20 PM
I have a John Deere D170 with 54 inch mowing deck. The serial number on both the mower and the deck is 1GXD170ETBB106337. The idler arm broke into and I have received the replacement. I am unsure of the installation as I had nothing to follow. Also, when I attach the idler pulley, is it supposed to moved? When I put the arm in the position the diagram seems to show and put the bolt in, the arm locks down and doesn't seem able to move. I live in Virginia, a fair mechanic and I am 70 years old ( and healthy).

crigby
Aug 4, 2013, 08:52 PM
Hi,
This machine is new enough that the operators manual is online and it is, of course, listed at JDParts. Attached are pictures from both.
The nut on the idler(#2) has a shoulder that clamps the center sleeve of the bearing of the pulley only. The washer(#5) is step washer in that it has a smaller cylindrical portion on the bottom that aligns with the hole in the arm.
Peace,
Clarke