TM 9-2330-294-14
cleaning of parts to remove final traces of grease, oil
(3) Paint exterior of walkways with walkway
or dirt, particularly from recesses.
compound, non-slip, MI L-W-5044, type II, color
(b ) If sometime is to elapse before the start
OD, Fed Std 595. All remianing exterior surfaces
of repair or overhaul operations, apply a coat of light
will be painted olive drab in accordance with TT-E-
529 or TT-E-485.
surfaces to prevent rusting.
j. Repairing Damaged Threads.
1. Cleaning after repair or overhaul.
(1) When determined feasible by inspection,
repair or overhaul operations and prior to assembly,
damaged thread should be repaired by retapping, by
use of a thread die or by use of thread restorer file.
remove shop dirt and other foreign matter from all
metal surfaces. This is accomplished by the dip-tank
(2) Tapped holes for screw thread inserts that
and vapor-degreaser methods or by cleaning with
have mutilated threads may be repaired by:
cloths soaked in dry cleaning solvent type II (SD-2).
(a ) Drilling and tapping holes oversize and
2. Cleaning after shop inspection. After
installing larger screws.
in-process shop inspections, dip parts in a tank
(b ) Filling tapped hole by welding and
containing finger print remover oil (type A), remove
redrilling and tapping hole to original size.
parts (with rubber gloves), and dry thoroughly with
k. Removing Burrs, Scratches, and Raised Metal.
dry compressed air (provided with moisture filter
(1) Use fine mill file, soft stone, or crocus cloth
traps) or by wiping with clean, lint-free cloths.
dipped in dry cleaning solvent type II (SD-2) to
remove burrs, scratches, or raised metal.
cleaning.
(2) When filing aluminum, clean file often with
steel file brush to avoid loading file with aluminum
particles which will gouge work surface.
l. Cleaning.
(1) General. Refer to TM 9-247 for cleaning
materials to be used.
CAUTION
(2) Cleaning of Material Received from Storage.
The dimensions included in this paragraph
(a ) Material received by direct and general
are for reference purposes only and are not to
support maintenance units from storage will be
be understood as wear limits.
cleaned by the dip-tank, vapor-degreaser, or steam
a. General. Suspension alinement for both front
method, whichever is applicable or available.
and rear tandems depends on the proper installation
Descriptions of these methods are as follows:
and suspension components that are in good con-
1. Dip tank method. Disassemble as
dition. Serviceability is the foremost criterion of
required, place parts in a perforated metal basket,
and submerge and agitate in a tank containing dry
the dimensions pertaining to suspension alinement
cleaning solvent type II (SD-2) (use rubber gloves).
on the new semitrailer. The procedure for taking
Repeat, using a second tank with clean solvent.
these measurements are as follows: With the
Extent of treatment in each tank will depend on ease
semitrailer on flat pavement, fix the axles in position
with which parts are cleaned.
so that the same distance (A) exista between the
2. Vapor-degreaser method. Tank con-
main beam and each axle on either side of the
taining a heated solution of trichlorethylene or
semitrailer. This can be done by shimming below the
perchlorethylene (type II) are used for decreasing
axle or by wedging blocks of the same size between
items that are very greasy or oily and are not readily
both ends of each axle and the portion of the main
cleaned by dip-tank method. Place parts in a per-
beams above the axle. Once the axles are fixed
forated metal basket and submerge just below the
parallel to, and equal distances from the frame, the
vapor in the tank, keeping the basket in this position
until all the grease, oil, or dirt melts and runs off the
Install pipe extensions to each end of first axle.
parts. If necessary materiel may be washed with
Extensions must be the same length and installed
decreasing spray unit.
the same measurement on the axle ends. The ex-
WARNING
tensions must be long enough so that measurements
Personnel operating vapor-degreaser are
taut ioned not to breathe the vapor fumes.
tires. Measure the distance between axles from the
3. Steam method. Place parts in a per-
center of the axle extension ends. Distances (B), on
forated metal basket and steam treat until clean.
both sides of the semitrailer should be within 3/32
This method is less efficient than the vapor-
inch of each other. Distance (C), on both sides of the
degreaser method and may require additional