O-ring
Seal
O-ring
Seal
Wear
Plate
Drive
Gerotor
Seal
Ring
Spacer
Manual Steering
Check/Relief Valve
O-ring
O-ring
O-ring
End
Cap
Cap
Screw
(7)
Plug
Dust
Seal
Housing
Quad
Seal
Thrust
Bearing
Bearing Race (2)
Spool and Sleeve
EATON Char-Lynn
Power Steering, Steering Control Units 001, 5 Series C-STCU-TS002-E August 2003
3
Round Housing
and Square
Housing with
Side Ports
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. Before disas-
sembly, 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 seven cap
screws and disassemble
the SCU as shown in
figure 1.
2. Remove the plug and
manual steering check
as shown in figure 1.
Note:
The manual steering
check may be a check ball
or a check/relief valve.
Disassembly
3. Slide the spool and sleeve
from the housing, see
figure 2.
4. Remove the thrust bearing
and bearing races.
5. Remove the quad seal.
Disassembly
6. Using a small blade screw-
driver, carefully pry the
dust seal from the housing.
Important:
Do not damage
the dust seal seat.
Figure 1
Figure 2
