obtained, replace the relief valve assembly. If pressure
can be used to lift the front end of the unit so the guide
remains low, disassemble the pump and inspect all parts
rolls and steering axle assembly can be removed.
for damage and wear.
a. Remove front scraper assembly. Then position
guide roll rear scraper in the "up" position (see figure 9-
STEERING TRUNNION ASSEMBLY.
WARNING: The scraper bar may be sharp.
9-90. The Steering Trunnion Assembly consists
b. Remove the capscrews (four) from both steering
primarily of a king pin assembly, oscillation pin assembly,
yoke caps. Then remove and tag the caps (see figure 9-
steering yoke, axle assembly, and two guide rolls. The
unit gooseneck frame rests on the trunnion assembly.
Two guide rolls are used to prevent scuffing of material
NOTE: Yoke caps are matched and must be assembled
during turns. The oscillation pin assembly allows the
to the same side of the yoke from which they
steering yoke to adjust to differences in ground levels
preventing bridging between the drive drum and guide
WARNING: Be sure drive drum is securely blocked.
9-91. REMOVAL OF GUIDE ROLLS AND STEERING
c. Lift the gooseneck up until the guide roll shaft will
clear the steering yoke. Carefully roll the guide roll
9-92. The method of removing the axle shaft assembly
depends upon the availability of the equipment. An
d. Lower the gooseneck until the frame is securely
overhead crane of a lift truck
held by the blocks. Then lift the axle