TM 5-3895-383-24 22. Remove check ball (29) and check ball retainer (30) from the control housing.  Remove O-ring seals (31) and (32) from check ball seat (28).  Inspect the O-ring seals for wear or damage.  Replace if necessary. NOTE: The following steps are for the assembly of the metering pump (steering). NOTE: Be sure all parts of the steering control unit (SCU) are clean and free of dirt and debris.  Do not use a cloth or paper towel to dry parts.  Lint or other material can get into the hydraulic system and cause damage to components.  Replace any parts that have scratches or burn that could result in leakage.  Lubricate all moving parts with clean hydraulic oil during assembly.  Assemble with all new seals. 23. Install check ball retainer (30) in control housing (12). Be sure the retainer is straight and not tilted in the bore. Install check ball (29). 24. Put a thin coat of 1U-6396 Assembly Compound on O- ring seals (31) and (32) and check ball seat (28).  Install the O-ring seals in their original location on the check ball seat.  Install the check ball seat in the center housing, using an 1/8"-24 machine screw. 25. Install set screw (27), and tighten it to a torque of 11 Nm (100 lb-in).  After installation, the set screw should be slightly below the outside surface of the center housing. 26. Put a thin coat of clean hydraulic oil on control spool (19) and control housing sleeve (20).  Install the control spool in the control housing sleeve.  The spool should turn freely in the sleeve.  Put the spring slots in each component in alignment.  Some spool and sleeve sets may have alignment marks on them.  In this case, align the marks.  Install centering spring kit (21).  Be sure the springs are centered.  Install pin (18) that holds the spool and sleeve together.  The pin should be flush on each side of the sleeve after installation. NOTICE When spool and sleeve assembly (11) is installed in the control housing, be sure it is not tilted out of position.  The assembly should be pushed gently into place with a slight rotating action, keeping pin (18) nearly horizontal.  The spool and sleeve assembly should be installed until it is flush with the meter end of the housing (side with fourteen holes in the end).  Be sure pin (18) does not drop into the discharge groove in the center housing.  Be sure the spool and sleeve assembly turns freely in the center housing. 27. Put the center hous ing in a vertical position.  Install two bearing races (16), needle thrust bearing (17), O-ring seat (15), O-ring seal (14) and backup ring (13). 28. Assemble gland bushing (23).  Install dust seal (24) in seal gland bushing (25) with the flat or smooth side of the seal facing the bushing.  Turn the seal gland bushing over.  Install quad ring seal (26) in the seal gland bushing.  Smooth the seal in place with your finger.  Do not reuse a seal that falls freely into the pocket in the bushing. 29. Install gland bushing (23) over the spool with a twisting motion.  Use a soft faced hammer to seat the gland bushing against bearing race (16).  Install retaining ring (22).  Be sure the retaining ring is properly seated. 30. Put the metering pump (steering) in a  vertical position with the steering column facing down.  Install O-ring seal (10) in control housing (12). 31. Install spacer plate (9).  Be sure the bolt holes in the spacer plate align with the tapped holes in the center housing.  Put pin (18) in a horizontal position in the center housing.  Install drive (8).  Be sure the slot in drive (8) engages with pin (18). NOTICE The metering pump (steering) must be timed, this requires the correct relationship between pin (18), Gerotor (6) and housing (4).  One end of pin (18) will point to the largest clearance between the Gerotor and Gerotor housing, the other end of the pin points to the least clearance.  Pin (18) cannot be seen after drive (8) is installed, so it will be necessary to make a mark on the gear end of the drive for proper alignment. 14-22