Cleanliness is extremely important when repairing a steering control unit. Work in a clean area. Before disconnecting lines, clean port area of unit thoroughly. Use a wire brush to remove foreign material and debris from around exterior joints of the unit.
Although not all drawings show the unit in a vise, we recommend that you keep the unit in the vise during disassembly. Follow the clamping procedures explained throughout the manual.
Meter (Gerotor) End
1 Clamp unit in vise, meter end up. Clamp lightly on edges of mounting area, see Fig. 1. Use protective material on vise jaws. Housing distortion could result if jaws are overtightened.
2 Remove 5/16" cap screws.
3 Remove end cap.
4 Remove seal from end cap.
5 Remove meter. Be careful not to drop star.
6 Remove seal from meter.
7 Remove drive spacer(s) (not used on 4.5 cu. in displacement units).
8 Remove drive.
9 Remove spacer plate.
10 Remove seal from housing.
11 Remove housing from vise. Place housing on a clean soft cloth to protect surface finish. Use a thin blade screwdriver to pry retaining ring from housing, as shown in Fig. 5.
12 Rotate spool and sleeve until pin is horizontal. Push spool and sleeve assembly forward with your thumbs just far enough to free gland bushing from housing, see Fig. 6. Remove bushing
13 Remove quad ring seal from seal gland bushing.
14 Use a thin bladed screwdriver to pry dust seal from seal gland bushing. Do not damage bushing.
15 Remove 2 bearing races and the needle thrust bearing from spool and sleeve assembly.
16 Remove spool and sleeve assembly from 14 hole end of housing, see Fig. 9.
Attention: Do not bind spool and sleeve in housing. Rotate spool and sleeve assembly slowly when removing from housing.
17 Push pin from spool and sleeve assembly.
18 Push spool partially from control end of sleeve, then remove 6 centering springs from spool carefully by hand, see Fig. 10.
19 Push spool back through and out of sleeve, see Fig. 10. Rotate spool slowly when removing from sleeve.
20 Remove seal from housing, see Fig. 11.
21 Remove set screw (not used on units with integral column) from housing, see Fig. 11.
22 Screw a 1/8"-24 machine screw into end of check ball seat. Then by pulling on screw, with a pliers, lift seat out of housing.
23 Remove 2 seals from check valve seat.
24 Tip housing to remove check ball and check ball retainer.