4-13. Air Cleaner Housing Vertical Guide Rework.
Misalignment between the air cleaner housing vertical guide bar and filter element
locating pin causes an improper filter seal. T o correct this problem the following
procedure must be performed.
(1) Tools and Equipment Required:
Primer - NSN 8010-00-161-7425, Spec-TT-P636
Paint - NSN 8010-00-111-7937, MIL-E-52798
Air-Vat Vacuum Tool - NSN 7910-00-807-3704
Hand Grinder - NSN-5310-00-889-8979
Grinding Wheel - 2" x 1/2", 18500 RPM min for 3/8" arbor.
Cut-off Wheel - 2" x 1/8", 18500 RPM min for 3/8" arbor.
Scale or Ruler
Approved Eye Protection
(2) Fabricate template (fig. 4-27).
Template can be fabricated to simplify measurement and
scribing of guide bar.
Rework procedure can be accomplished without template by
measuring directly on guide bar.
(3) Remove air cleaner filter element (TM-20).
If template was fabricated, go to step (4). If template was
not fabricated, go to step (5).
(4) Position template on air cleaner housing and scribe left and right vertical guide
bars as indicated (view A). Go to step (6).