20 - 5
20 Power Steering Unit Service
Disassembly
DISASSEMBLY
Cleanliness is extremely important when repairing
hydraulic Steering Control Units (SCU). Work in a clean
area. Before disconnecting the hydraulic lines, clean the
port area of the SCU and tag the hoses for proper instal-
lation. Before disassembly, drain the oil, then plug the
ports and thoroughly clean the exterior of the SCU.
During repairs, always protect machined surfaces.
Figure 5. Disassembling the SCU
Figure 6. Remove Spool and Sleeve from Housing
1. Remove the capscrews and disassemble the SCU as
shown in figure 5.
2. Remove the plug and manual steering check ball as
shown in figure 5.
NOTE: The manual steering check is a check ball.
3. Slide the spool and sleeve from the housing, see
figure 6.
4. Remove the thrust bearing and bearing races.
5. Remove the quad seal.
6. Using a small blade screwdriver, carefully pry the
dust seal from the housing.
IMPORTANT: Do not damage the dust seal seat.
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