Taylor TX180S, Maintenance Manual

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A-3 A-3 TX / TXH / TXB 180S - 400L (Rev. 4/23/07) TX / TXH / TXB 180S - 400L (Rev. 4/23/07)
tude, these cracks will grow tude, these cracks will grow . . This is known as This is known as
fatigue crack fatigue crack growth. growth. No matter No matter how low the how low the
stress levels are kept some fatigue crack growth stress levels are kept some fatigue crack growth
will occur in all welded structures. will occur in all welded structures.
Eventually, these fatigue cracks will become large Eventually, these fatigue cracks will become large
enough to be detectable by nondestructive testing enough to be detectable by nondestructive testing
methods, i.e. VT, MT, DPT, or UT. methods, i.e. VT, MT, DPT, or UT.
Abbreviations. Abbreviations. Basic Basic T T esting Symbols esting Symbols
T T y y p p e e o o f f T T e e s s t t S S y y m m b b o o l l
V V i i s s u u a a l l V V T T
M M a a g g n n e e t t i i c c P P a a r r t t i i c c l l e e M M T T
D D y y e e - - P P e e n n e e t t r r a a n n t t D D P P T T
U U l l t t r r a a s s o o n n i i c c U U T T
you have you have prior written approval prior written approval of the manufac- of the manufac-
turer for such changes. turer for such changes.
Test Procedures Test Procedures
1. 1. Visual (VT). Visual (VT). Dirt and Dirt and grease should grease should be be
removed from the surface by wiping with a rag. removed from the surface by wiping with a rag.
One should look for cracked paint and rust One should look for cracked paint and rust
showing through showing through the paint. the paint. Also, look Also, look for for
movement at bolted joints, irregular lines in movement at bolted joints, irregular lines in
welds or dents, or deformations in the materi- welds or dents, or deformations in the materi-
al. al. Proper lighting is Proper lighting is required in order required in order to to
obtain satisfactory results. obtain satisfactory results.
2. 2. Magnetic Particle (MT). Magnetic Particle (MT). The The test test surface surface
must be free of loose rust, scale, moisture, must be free of loose rust, scale, moisture,
and painted surfaces must be cleaned at all and painted surfaces must be cleaned at all
points of points of electrode contact electrode contact . . Grinding, brush- Grinding, brush-
ing, or blasting do not affect results of this ing, or blasting do not affect results of this
method of testing in most instances. method of testing in most instances.
A magnetic field can A magnetic field can be applied to be applied to the test the test
material with: material with:
a. a. Pe Pe rm rm an an en en t ma t ma gn gn et et . .
b. b. Y Y oke w oke w hic hic h is an el h is an el ect ect rom rom agn agn et ty et ty pe of pe of
device. device.
c. c. Pas Pas sin sin g hig g hig h am h am per per age c age c urr urr ent ent thr thr oug oug h h
the part. the part.
3. 3. Dye-Penetrant (DPT) Dye-Penetrant (DPT) . . The tes The tes t surfac t surfac e must e must
be thoroughly be thoroughly cleaned and cleaned and dried. dried. This can This can be be
done with chemical solvents, vapor degreas- done with chemical solvents, vapor degreas-
ing, or by ing, or by mechanical methods. mechanical methods. However However , ,
cleaning mechanically, such as grinding, blast- cleaning mechanically, such as grinding, blast-
ing, or wire-brushing, might prove detrimental ing, or wire-brushing, might prove detrimental
to the test because surface discontinuities can to the test because surface discontinuities can
be masked by cold working of the surface. be masked by cold working of the surface.
Therefore, mechanical cleaning methods must Therefore, mechanical cleaning methods must
be kept to a minimum. be kept to a minimum.
One of the following type penetrants should be One of the following type penetrants should be
used in conjunction with the proper procedure used in conjunction with the proper procedure
to get satisfactory results: to get satisfactory results:
a. a. W W at at er s er s ol ol ub ub le pe le pe ne ne tr tr an an t t
b. b. Pos Pos t t emu emu lsi lsi fia fia ble ble pen pen etr etr ant ant
c. c. So So lv lv en en t rem t rem ov ov ab ab le pe le pe ne ne tr tr an an t t
Follow the directions supplied with the dye- Follow the directions supplied with the dye-
penetrant for best results. penetrant for best results.
4. 4. Ultrasonic (UT). Ultrasonic (UT). T T esting should be esting should be done in done in
accordance with AWS D1.1 approved meth- accordance with AWS D1.1 approved meth-
ods. ods.
Frequency of Inspection. Frequency of Inspection. There There are are three three (3) (3)
levels of inspection: levels of inspection:
two years or 6,000 hours, whichever is sooner, two years or 6,000 hours, whichever is sooner,
thereafter. thereafter. These inspect These inspect ions should ions should be per- be per-
formed by qualified maintenance personnel. formed by qualified maintenance personnel.
NOTE: NOTE: Duty cycles Duty cycles vary from vary from extremely severe extremely severe
(capacity loads, high frequency of loading, rough (capacity loads, high frequency of loading, rough
yards, etc.) to very light yards, etc.) to very light (partial capacities, few (partial capacities, few
load cycles, good yard load cycles, good yard conditions, etc.). conditions, etc.). Duty Duty
cycle directly affects product life and maintenance cycle directly affects product life and maintenance
requirements. requirements. Depending on Depending on the quality and the quality and thor- thor-
oughness of the daily inspections and the service oughness of the daily inspections and the service
experience of the vehicle, the three-month visual experience of the vehicle, the three-month visual
inspection interval and inspection interval and the full-scale the full-scale inspection inspection
interval may be interval may be adjusted (increased or adjusted (increased or decreased) decreased)
to levels appropriate for an individual vehicle duty to levels appropriate for an individual vehicle duty
cycle. cycle.
                               
                                             
       
Reporting Procedure. Reporting Procedure. T T aylor Machine W aylor Machine W orks, orks,
Inc. should receive reports of the results of any Inc. should receive reports of the results of any
inspections. inspections.
Photocopy a sketch from your maintenance manu- Photocopy a sketch from your maintenance manu-
al, make your own sketch, or photograph, and al, make your own sketch, or photograph, and
show indication of crack if any are evident, stating show indication of crack if any are evident, stating
the following: the following:
1. 1. Locati Locati on (ri on (ri ght, l ght, l eft, eft, inner inner , out , out er er , mac , mac hine s hine s ide ide
etc.); etc.);
2. 2. Si Si ze ze of of c c ra ra ck ck ; ;
3. 3. Ex Ex te te nt nt of of cr cr ac ac k; k;
a. a. In In t t oe oe of of w w el el d; d;
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