Assembly Of Power Pack Handle-Release Mechanism; Installation Of Manifold - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
6-42. ASSEMBLY OF POWER PACK HANDLE-RELEASE MECHANISM. (Refer to Figure 6-8.)
a.
If the landing gear handle shaft (1) or gear (2) was removed, the parts must be indexed and
assembled as shown in Figure 6-8.
b.
Lubricate the shaft (1), install the cam (3) and spacer (4) on the shaft and insert the shaft into
the power pack.
c.
Install the return cam (5) with the roll pin (6). Both sides of the cam surfaces are identical. Check
the landing gear handle shaft for freedom of movement in the power pack. Check for slight end play in the
shaft. If shaft binds, remove the cam and lap inside boss of cam to obtain slight end play in the shaft with
the cam installed.
d.
Install the handle-release housing and safety the attaching screws. Check the landing gear shaft
for freedom of movement.
e.
Install the power pack control arm on the end of the shaft with the arm pointing down. Align the
holes between the shaft and the arm assembly and install the roll pin. Install .040 safety wire through the
roll pin and around half of the arm. Roll the twisted end of the safety wire around the other half of the arm
assembly. (Refer to figure 6-9.)
NOTE
Do not install the plungers, springs and hex-head retainers
(adjusting plugs) at this time.
643. INSTALLATION OF MANIFOLD. (Refer to Figure 6-7.)
a.
Lubricate and install the O-rings (23) on the seven transfer tubes (22).
b.
Insert the transfer tubes into the power pack body.
c.
Install the time-delay valve plunger (3) in the manifold. The plunger must move freely in the
manifold without binding.
d.
Mate the manifold to the power pack body, using care to prevent damage to the O-rings on the
transfer tubes. Align the dowel pin on the power pack with the dowel hole in the manifold.
NOTE
When installing the manifold, time the landing gear assembly to
the rack on the selector spool as shown in Figure 6-10. Refer to
the following steps if binding exists.
e.
Install the four manifold attaching bolts (29) and washers (28). Torque the bolts to 35
inch-pounds and safety. Do not over-torque the bolts, as this will cause binding in the movement of the
landing gear handle.
f.
Lubricate and install the two-rings on the time-delay valve retainer. (Refer to Figure 6-7.)
g.
Lubricate and insert the larger spring and spacer in the body through the reservoir.
h.
Lubricate and insert the ball and smaller spring in the time-delay valve retainer (ball next to the
top of the retainer).
i.
Lubricate the threads on the time-delay valve retainer and install the retainer in the body through
the reservoir. Do not over tighten the time-delay valve retainer as this will cause the landing gear selector to
bind in the manifold. After tightening the time-delay valve retainer, check for freedom of movement of the
landing gear selector spool.
j.
Thoroughly lubricate the handle return springs and plungers and install in the housing with the
hex-head retainers. Do not tighten the retainers at this time.
Reissued: 9/23/80
2B11
HYDRAULIC SYSTEM