Advertisement
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.
SM 1690 Rev 1 11-99
Chassis - Chassis, Hood and Fenders
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 -
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.
Reinforcement
Frame reinforcement can be made with channel,
angle, or flat structural stock. Whenever possible, the
reinforcement should extend well beyond the bent,
broken, or cracked area. The reinforcement stock
thickness should not exceed that of the frame stock
and the material should be of the same tensile
strength.
Find manuals at http://best-manuals.com/search?&s=TEREX-SM1688
Alternator supply cables
Section 100-0010
7
Advertisement
