AN 01-25CN-2             PARAGRAPH 6
  13. As the valves are removed from the valve body be sure to mark them so that they will be installed in the same location.

  14. After all valves have been removed, free the valve body from the vise and lay it on the bench so that a small diameter bar or screw driver may be inserted from the bottom side of the valve body. Push the assemblies containing a top and bottom washer, two rubber cups, and a spacer out of the valve body.

  15. Next remove the snap rings from both sides of the inlet port with a snap ring wrench.

  16. Remove the retainer, the spring, and the valve on each side of the inlet port. The control valve is now completely disassembled as illustrated in Fig. 102.

  (e) TO ASSEMBLE THE HYDRAULIC CONTROL VALVE.

  1. GENERAL-Before assembling the control valve, be sure that all passages are free of grit, dirt, or other foreign matter. Clean the valve body and all parts with alcohol and blow out with compressed air if available.

  2. Assemble the valve, reversing the procedure outlined above.

  3. When assembling the valves in the valve body it is extremely important that each valve is replaced in its proper location, as all valves are lapped into the respective seats on the original installation. If new valves are installed they too must be lapped into their seats.

  4. Be sure that the proper gasket and shims are installed below each follower.

  5. When the valve is completely assembled, check the clearance of the camshafts and followers with feeler gages as outlined in Fig. 103. The clearance between camshafts and followers must be between .005 and .015 inch. Clearance between cams and fol. lowers may be adjusted by adding or removing the brass shims under the followers.

  6. Before installing the control valve in the airplane, test the valve under pressure in accordance with the instructions outlined in Fig. 104.



         (f) TO DISASSEMBLE AND ASSEMBLE THE LANDING GEAR RETRACTING STRUT.

  I. TO REMOVE THE RETRACTING STRUT FROM THE WING.

  a. Jack the airplane and extend the strut about half-way so that the piston end protrudes into the wheel pocket.

  b. Working through the wheel pocket, remove the through bolt attaching the upper retracting links to the piston end.

  c. Retract the strut and disconnect the two hydraulic lines at the aft end of the strut.

  d. Remove the three attaching nuts at the aft end_of the cylinder and pull the strut out of the wing through the wheel pocket.

  2. TO WSASSEMBLE THE RETRACTING STRUT -

  a. Remove the length of pipe extending to the forward end of the cylinder.

  b. Place the cylinder in a wooden block clamp and secure the clamp in a vise.

  c. Remove the cotter pin and pull the clevis, pin retaining the rocker in the cap assembly.

  d. Place the handle of the hand pump spanner wrench or some similar tool in the cap and turn the cap out of the cylinder.

  e. Remove the cylinder from the vise and wooden block clamps. Extend the piston by standing the strut on the piston end to allow the pawl to slide down the piston rod and disengage the mechanical locks. Pull the piston out of the cylinder far enough to insert the piston in a wooden block clamp and secure the clamp in a vise.

  f. Place a hard wood block on the piston end and tap the block with a hammer until the piston end is loosened. Turn off the end of the piston and remove the piston from the wooden block clamp.

  g. Replace the cylinder in the wooden block clamp and secure it in a vise. Push the piston, piston rod, and cap out of the cylinder and hold a hand under the cylinder to catch the locks as they drop out of the square broached holes in the piston. Revolve the piston until all locks have fallen out. Pull the piston assembly from the cylinder and remove the cylinder from the vise.