Stone XD836Y, Operators & Service Manual

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7.3 INSTRUCTIONS FOR SERVICE
LOWER UNIT XN OIL INJECTED AND PRE-MIX
STOMPER MODEL XN650
1. Detach the shoe from the stomper by removing (6) shoe bolts and washers.
2. Thread M8 nuts onto (2) full thread M8 x 5.50” bolts (provided in kit) 1.25” up from the bottom of the bolts (see
Figure A).
3. Replace two bolts that are diagonal from each other on the bottom spring cover with assembled full thread bolts with
nuts from Step 2. Make sure to thread the assembled bolts in a full 1.25” (see Figure B).
4. Remove the other (4) bolts from the bottom spring cover (leaving the full thread bolts in place).
5. Carefully back each nut off a .25” at a time on each side using two wrenches (one to hold the bolt in place and the
other to back the nut off) until the spring tension is removed (see Figure C).
6. Then remove the full thread bolts and the bottom spring cover to access the springs.
7. Remove lower spring set.
8. Insert snubber puller, P/N 39539, under snubber (Item 14). Insert pry bar under snubber puller and pop loose
snubber.
9. Using M24 deep socket, remove M16NY locknut from piston rod. Insert 5/8" or smaller rod through top of piston rod
head to hold rod from turning to remove nut.
10. Piston puck and upper springs can now be accessed.
11. Reassemble in reverse order.
* Use red loctite 264 on shoe bolts only.
ITEM P/N DESCRIPTION QUANTITY
KIT 23159 Kit Snubber Puller XN 1
1 56338 Instructions Lower Unit Service XN 1
2 50107 Weld Thread M8 x 5.50 in. 2
3 39539 Puller Snubber 1
4 80854 NUTFX M8-1/25 2
Figure B Figure C
Figure A
The spring retaining Base Plate retains heavy springs
under compression. Follow the instructions carefully
or severe personal injury may occur.