Pg. 6
PSA-CAT854G-FS 18-10-12
FOLDING STAIRWAY
Caterpillar 854G Wheel Dozer
Section 1
Installation Drawings
Bumper Reinforcements PS-24311/2
PROCEDURE.
See Drawing 24311 Page 7
1.
Cut away the bottom of the wall of the OEM bumper/tank enclosure over a length
of 275mm centred on the bottom of the rear bolting pad. Cut up to the alignment of
the floor of the bumper/tank enclosure. Per Views Z-1 and Y and Detail X. Note
that the internal corners at the ends of the cut must be radiused to approx R6 per
Detail W - this can done while cutting or by rectification with weld later.
2.
Cut a groove centred on the abutment of the wall and floor up to a depth of 10mm
along the length of the cut (from 'i' above), using gas-oxygen gouge or electric air-
arc. The width of the groove is not important as long as it can be filled with weld per
'iii' below. See View Y & Detail X.
3.
Fill the groove cut at the junction of the wall and floor (from '2' above) with weld to a
level averaging 2mm above the floor plate - that is, leaving 2mm NOT FILLED with
weld. Grind back any protrusions to the alignment of the underside of the floor.
USE SAFE WORKING PRACTICES AT ALL TIMES, including, if necessary,
making the fuel tank safe from the effects of heat caused by the cutting, welding
and grinding. Refer also to drawing 24 308.
PROCEDURE.
See Drawing 24312 Page 8
1.
Attach Floor Plate 24 306 01 under the bumper floor per Views Z & Y and Detail V,
protruding 25-27 outside the bumper wall alignment. At this stage it can tack-
welded in place except that the 12mm fillet weld shown in Detail V must be finished
before moving on to '2'.
2.
Fit and weld Wall Plate 24 306 02 per Views X & W and Detail U.
3.
Ensure that the re-entrant corners of the at the ends of the cut out at the bottom of
the bumper wall are round and smooth, per Detail T. Fill & grind if necessary.
USE SAFE WORKING PRACTICES AT ALL TIMES.
Take note of the warning in Drg 24 308 about welding near the fuel tank and take
precautions as required.
NOTE
Follow all on-site/Mine lifting and safety procedures when installing
PSFS to Wheel Dozer
