110, 230, and 450 Series Steering Control Units
5
12 Carefully remove anti-cavitation valves and manual steering check
valve (roll pin and ball – if applicable) from bolt holes by tipping
housing as shown (see figure 5).
Control End
Seal Gland Bushing
Special Seal Gland Marked
with Groove for Identification
Replacement
Teflon Seal (1 Piece)
Springs (4)
Spring
Spacers (2)
Low Input
Torque
Steering
Control
Units
Old 3 Piece
Teflon Seal
Standard Seal
Gland Not Marked
with Groove (Special Seal
Gland Shown with Groove Above)
Quad Ring Seal
Springs (6)
Standard Input
Torque
Steering
Control
Units
Dust Seal
Dust Seal
13 Place housing on clean soft cloth, gerotor end down, to protect
surface finish. Use thin bladed screwdriver to pry retaining ring from
housing, as shown in figure 6.
14 Lift spool and sleeve assembly up just far enough to free gland
bushing from housing (figure 7). Remove bushing.
Note: Examine bushing to determine whether you are repairing low
torque or standard torque unit. Low torque unit has grooves on seal
gland bushing while standard torque unit has no grooves on bushing.
Seal gland bushings for low input torque and standard torque units are
not interchangeable (see figure 8).
15
Low Input Torque Units: Remove back-up ring, o-ring and Teflon
seal from seal gland bushing.
Standard Input Torque Units: Remove
quad ring seal from seal gland bushing.
16 Use thin bladed screwdriver to pry dust seal from seal gland
bushing. Do not damage bushing.
Disassembly
Figure 5
Figure 6
Figure 7
Figure 8
Ball
Ball
Ball
Roll Pin
Roll Pin
Retainer Plug
Spring
Early Units
*
Built
with these Parts
*
Anti-Cavitation Valves
for Cylinder Ports
Manual Steering Check
Valve (when applicable)
