Figure 7. Removing Column From Housing

TM 10-3930-644-14&P

Figure 8. Removing End Plate Capscrews

sleeve assembly from the 14-hole end of the

housing.

Figure 7. Removing Column From Housing

CAUTION

Use extreme care when removing

CAUTION

these parts, because they are very

Do not use a hammer to free the

closely fitted and must be rotated

shaft. Upper shaft bearing may be

slightly as they are withdrawn.

damaged.

14. With a small bent tool or wire, remove check

6. Remove the two capscrews that secure the

valve zeal plug from housing (Fig. 13). Do not

column to the lower unit. Match mark the

pry against edge of hole in housing bore.

capscrew holes so the ports will be in the proper

15. With housing installed in vise, control end up,

direction when reassembled.

Remove the

remove check valve seat with 3/16 hex wrench

column from the lower unit (Fig. 7).

(Fig. 14).

7. Clamp the unit in the vise with the meter end up

16. Turn the housing over and tap lightly with palm

and remove the seven capscrews (Fig. 7).

of hand. With check valve

Remove the three-section cap, gear, and plate

as a unit, and set to one side on the bench

(Fig. 8).

8. Remove control assembly from vise, and check

for free rotation of the control spool and sleeve

parts with the column shaft (Fig. 10).

9. Place a clean wooden block across the vise

throat to support spool parts. Clamp unit across

port face with control end up and remove the

four capscrews.

10. Hold the spool assembly down against the

wooden block, and remove the end cap

(Fig 11 ).

11. Inspect mating surfaces for obvious leakage,

path wear, and seal condition.

12. Remove cam locator bushing (Fig 12.).

13. Place port face of housing securely on a solid

surface and remove the spool

Figure 9. Removing End Plate Assembly

3-164