Terex TS14G, Maintenance Manual

Page: 334 / 376

Section 280-0010
Body - Scraper Bowl and Tail
SM 1799 Rev 2 04-04
6
MAINTENANCE
Inspection
Inspect the frame and attached parts at intervals not
exceeding 250 hours for cracked or broken welds and
bending/twisting of the frame. Any defects found
should be repaired before they progress into major
failures. Contact your dealer for recommended weld
and repair instructions.
Straightening
Hydraulic straightening or aligning equipment should be
used to straighten bent or twisted frames whenever
possible. However, if heat must be applied, never heat
the metal beyond a dull cherry red colour, as too much
heat will weaken the metal. When it is necessary to
heat the metal, apply heat uniformly over the area to be
straightened and protect the heated surface from
sudden cooling. Frame parts, that cannot be
straightened should be replaced.
Welding
WARNINGS
Before any welding is done on a machine
equipped with the HEUI electronic
management system, disconnect the following
in this order: Battery earth cable, battery
supply cable, alternator earth cables,
alternator supply cables, front & rear
transmission ECU connectors (located behind
access door below cab door) and front & rear
engine ECU connectors (located on LH side of
engine). Turn off battery master switch before
disconnecting any components. After welding
connect all of the above in the reverse order.
Welding and flame cutting cadmium plated
metals produce odourless fumes which are
toxic. Recommended industrial hygiene
practice for protection of the welding operator
from the cadmium fumes and metallic oxides
requires enclosure ventilation specifically
designed for the welding process. A
respiratory protective device such as the
M.S.A. 'Gasfoe' respirator with G.M.A.
cartridge will provide protection against
cadmium, fumes and metallic oxides. The
'Gasfoe' respirator has been approved by the
U.S. Bureau of Mines: Approval number
23B-10, and is designed to protect against
gases, vapours, and/or metal fumes.
Note:
Prior to welding, switch off/disconnect the
following in the order given. Failure to do so may
seriously damage the machines electrical
components.
a - Turn ignition keyswitch off
b - Turn battery master switch off
c - Battery earth cables
d - Battery supply cables
e - Alternator earth cables
f -
Alternator supply cables
g - Transmission ECU connectors (front & rear)
h - Engine ECU connectors (front & rear)
After welding, connect all of the above in the reverse
order.
Note:
Always fasten the welding machines ground
cable to the piece/frame being welded if possible.
Electric arc welding is recommended for all welded
frame repairs. Since the nature and extent of damage
to the frame cannot be predetermined, no definite
repair procedure can be established. As a general
rule however, if parts are twisted, bent or pulled
apart, or a frame is bent or out of alignment, no
welding should be done until the parts are
straightened or realigned.
Successfully welded repairs will depend to a great
extent upon the use of the proper equipment,
materials and the ability of the welder. The Service
Department can be consulted regarding the feasibility
of welding repairs.
Patching
There are two methods to be used when patching a
hole. On the outside surfaces where no moving parts
will come in contact with the patch, trim off the
curved edges of the hole and place a patch, of the
same thickness and type of steel, over the hole. This
patch should overlap the hole at least 51 mm
(2 inches) all around. Tack weld the patch in a few
places to hold it in place, and then weld around the
edges of the patch.
When patching a hole where moving parts must pass
over the patch, the hole should be trimmed with a
cutting torch and a patch of the same shape and
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