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 TM 55-1905-221-14-3
6-5.4
STEERING SYSTEM HELM UNIT (Continued)
LOCATION/ITEM
ACTION
REMARKS
ASSEMBLY (Cont)
d. Position the housing (13) on
solid surface with the port
face down. Start the spool
assembly (6 and 7) so that
the splined end of the spool
enters the 14 hole end of the
housing first. Be extremely
careful that the parts do not
cock out of position while
entering. Push parts gently
into place with slight
rotating motion. Bring the
spool assembly entirely
within the housing bore until
the parts are flush at the
meter end or 14 hole end of
the housing. Do not pull the
spool assembly beyond this
point (to prevent the cross
pin from dropping into the
discharge groove of the
housing). With the spool
assembly in this flush
position, check for free
rotation within the housing
by turning with light finger
force at the splined end.
Hold the parts in this flush
position and rest the 14 hold
end of the assembly on the
protective block on the vise
throat and clamp lightly
across the port face with the
vise.
e. Install a new seal (15) on the
Use new
plug (14). Install the plug
packing.
in the check hole with a
steady pressure while rocking
it slightly so the seal (15)
feeds in smoothly without
cutting.
6-56
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