Piper Navajo PA-31 Service Manual page 195

PIPER NAVAJO SERVICE MANUAL
b.
The square tube (31) assembly may be removed and disassembled by the following procedure:
1.
Remove the cotter pins (33) and bolt assemblies (32) that join the links (30) with the
control arm (11 and 13 or 16 and 18).
2. Remove the bolt assembly (35) that joins the forward end of the square tube (31) with the
flexible joint (36) of the sprocket assembly. Remove the square tube assembly from behind the instrument
panel.
3. The square tube assembly may be disassembled by first removing the collar (34) from the
tube (31). Draw the tube from the roller fitting (23).
4. Cut the wire (24) that safeties the cap bolts (67) that secure the collar (21) to the roller
fitting (23). Remove the bearing housing (22) from the fitting.
5.
Disassemble the rollers (69) from the fitting. Note the number and location of the spacer
washers (70).
c.
The sprocket assembly may be removed from the bulkhead and disassembled by the following
procedure:
1.
Disconnect one of the two turnbuckles (41) that connect the horizontal roller chains (40
and 42). Remove the outboard chain guard (56) from the inside of the sprocket housing (37 or 61) that is
to be removed. Unwrap the chain from the sprocket that is to be removed.
2.
If the left sprocket assembly (61) is to be removed, first remove the floor panel located
between the control pedestal and left side of the fuselage. Loosen one of the aileron cable turnbuckles at
fuselage station 100.0 to relieve tension from the vertical roller chain (52). Disconnect one end of the chain
where it attaches to the control cable and unwrap the chain from the sprocket.
3.
Remove the cap bolts (39) that attach the sprocket housing to the bulkhead and remove the
housing.
4.
To disassemble the sprocket assembly, remove the bolt that secures the sprocket to the
sprocket stud (64). Use a Kaynar wrench (P/N WI0-3) to remove the hex nut.
Kaynar Mfg. Co. Inc.
800 S. State College Blvd.
Fullerton, California
5.
Remove nut (58) and slide stud (64) from sprocket housing.
d.
To remove the torque tube (14) assembly, use the following procedure:
1.
Procedure for early 31-300 and 31-310 airplanes without tube extensions that aid in
disassembly:
(a)
With the floor panel removed from between the control pedestal and the left fuselage
side panel and the links (30) disconnect from between the control tube housing (22)
and the torque tube arms ( 11, 13, 16 and 18), loosen one of the elevator control cable
turnbuckles at fuselage station 110.5 enough to relieve cable tension.
(b)
Remove the bolts and roll pins (10 and 17) that secure the elevator control sector (8)
and the right set of control arms (16 and 18) to the torque tube (14).
(c) Loosen the bolt (20) that secure the right tube bearing (19).
Reissued: 10/12/79
SURFACE CONTROLS
113