Round Housing
with End Ports -
Disassembly
Disassembly
Cleanliness is extremely impor-
tant when repairing hydraulic
Steering Control Units (SCU).
Work in a clean area. Before
disconnecting the hydraulic
lines, clean the port area of the
SCU. Before disassembly, drain
the oil, then plug the ports and
thoroughly clean the exterior of
the SCU. During repairs, always
protect machined surfaces.
Disassembly
1. Remove the plug and inlet
relief as shown in figure 1.
Note:The manual steering
check is part of the inlet relief
valve. If inlet relief valve is
not present, the manual
steering check is located in
the housing.
2. Remove the four cap screws
and disassemble the SCU as
shown in figure 1.
3. Slide the spool and
sleeve from the housing,
see figure 2.
4. Remove the thrust bearing
and bearing races.
5. Remove the seal.sembly
6. Using a small blade
screwdriver, carefully pry the
dust seal from the housing.
Important: Do not damage
the dust seal seat.
7. Remove the pin that holds
the spool and sleeve togeth-
er, see figure 3.
8. Carefully slide the spool out
of the sleeve. The springs
and retaining ring will stay
with the spool as it’s
removed.
9. Remove the retaining ring
and springs.
Caution:The centering
springs are under tension;
remove the retaining ring
carefully.
Figure 1
Figure 2
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