Piper Navajo PA-31 Service Manual page 326

PIPER NAVAJO SERVICE MANUAL
d. Install the poppet (62) and spring (61) together, and insert in the body with the ball end toward
the seat.
e. Lubricate the threads on the retainer, hand pump relief (60). Start the retainer over the spring
(61) and tighten securely.
f. Lubricate the threads on the adjusting plug (59) and install at the top of the retainer (60). Do not
tighten the adjusting plug. Screw it down only until the spring is contacted. This is done so that air may be
bled from the valve during adjustment.
6-40. ASSEMBLY OF HAND PUMP SUCTION SCREEN. (Refer to Figure 6-10 or 6-11.)
a.
Install the suction screen (68) and spacer (67) secure with snap ring (66).
6-41. ASSEMBLY OF MANIFOLD. (Refer to Figure 6-12.)
a. Lubricate and install the "O" ring (32) on the landing gear selector spool (31), and the "O" ring
(14) in the manifold (29) at the opposite end.
NOTE
The landing gear selector spool, time-delay valve plunger, and
manifold are matched, lapped parts. If necessary to replace,
replace as an assembly only.
b. Insert the selector spool (31) in the manifold (29) from the landing gear handle end of the
manifold. Insert only until the end of the selector spool is flush with the solenoid end of the manifold.
CAUTION
If the selector spool is moved much more than flush with the
manifold at the end opposite the rack (before the manifold is
installed and the rack engaged properly with the gear), an "O" ring
will become caught. The selector spool will then have to be
removed, the manifold cleaned to remove all "O" ring particles,
and a new "O" ring installed. The selector spool then must be
reinstalled correctly.
c. Check that the landing gear selector spool (31) slides freely.
d.
Inspect the door solenoid spool for freedom of movement within the transfer sleeve assembly.
NOTE
The spool and sleeve are matched parts. If necessary to replace,
replace as an assembly only.
e.
Lubricate and install the "O" ring (28) on the transfer sleeve (27) and install the sleeve in the
manifold.
f.
Attach the plunger (20) to the door selector spool (8) and pin (19).
g.
Lubricate and install the "O" ring (17) on the door solenoid (16).
h.
Lubricate the door solenoid (16) threads and plunger return spring (18) and insert the plunger
(20), then install the solenoid over the spring and plunger. Screw the solenoid into the manifold. Do not
over tighten the solenoid, but tighten securely by hand. Safety the solenoid to the adjacent Power
Pack
mounting lug.
i. On OAS2930-1 Power Packs only, install the screw assembly (9), stop (10), spring (11), bushing
(12), bracket (36) and screw (13) to the solenoid side of the landing gear selector spool. Safety the screws.
Reissued: 10/12/79
HYDRAULIC SYSTEM
Effectivity
2B20
OZONE