Ditch Witch JT9 - Manual (Page 154)

JT9 Operator’s Manual
Service - 153
As Needed
CMW
®
Change Air Filter
To change:
1. Remove air filter cover (4) and remove primary
(3) and secondary (2) elements.
2. Wipe inside of housing (1) and wash cover.
3. Insert new elements.
4. Replace cover with dust evacuator valve at the
6 o’clock position.
5. Reset air filter service indicator.
Check Saver Sub
Check saver sub and replace as needed. See your
Ditch Witch
®
dealer for replacement parts.
To replace
1. Remove eight bolts (shown) that attach saver
sub to spindle. Do not remove indexing dowels
from spindle.
2. Remove and replace o-ring, if necessary.
3. Install in reverse order and tighten eight bolts in a cross pattern to 55 ft•lb (74.6 N•m). Apply Loctite
®
242 to bolts before installation.
Note: Saver sub must mate up to every drill
pipe. Check sub for thread wear. If saver sub
threads are more worn than pipe threads, saver
sub is damaging the drill pipe.