Piper Navajo PA-31 Service Manual page 340

PIPER NAVAJO SERVICE MANUAL
6-61. DISASSEMBLY OF MAIN RELIEF VALVE. (Refer to Figure 6-18, item 1.)
a.
Remove the adjusting screw (2) at the top of the main relief valve.
b. Remove relief valve body (5) with spring (3) and button (4).
c. Remove the poppet (6) from the poppet seat (7).
d. Use a brass hook, not over .125 inches long, and pull the poppet seat (7) up and out of the body
(67). Hook through the holes in the side of the seat and use care not to damage the bore in the body (67).
e. Reassemble poppet (6) into poppet seat (7). The poppet and poppet seat are matched parts.
6-62. DISASSEMBLY OF PRIORITY VALVE. (Refer to Figure 6-18, item 10.)
a. Remove the adjusting screw (11) at the top of the priority valve.
b.
Remove priority valve body (14) with spring (12), button (13) and poppet (19).
c. Use a brass hook and remove the poppet seat (20) from the body (67). Be careful not to score
the bore.
d.
Remove the "O" ring (21) from the bottom of the cavity.
6-63. DISASSEMBLY OF HAND PUMP CHECK VALVE. (Refer to Figure 6-18, item 88.)
a. Remove the fitting (89) from the body (67).
b.
Remove the snap ring (96) from fitting (89).
c. Remove guide (95), spring (94) and poppet (93).
6-64. DISASSEMBLY OF STANDPIPE-FILTER. (Refer to Figure 6-18.)
a. Remove the standpipe-filter (99) from body (67).
6-65. DISASSEMBLY OF VENT FILTER. (Refer to Figure 6-18.)
a. Remove snap ring (43) and pull out filter (42).
6-66. DISASSEMBLY OF DOOR VENT VALVE. (Refer to Figure 6-18, item 26.)
a. Remove adjusting screw (27) from top of retainer (30).
b.
Remove vent valve body (33) from body (67).
c. Remove spring (28) and stem (29).
d.
Cut wire (105) and remove retainer (30) from vent valve body (33).
e. Remove "O" ring (31) and piston (32).
6-67. DISASSEMBLY OF TIME DELAY CHECK VALVE. (Refer to Figure 6-18, item 59.)
a. Remove check valve body (65) from body (67).
b. Remove snap ring (60).
c. Using a brass hook, pull out seat (62).
d. Remove ball (63).
NOTE
A pin (64) is pressed into the body (65); do not remove. If it is
necessary to replace any parts, replace as an assembly only.
6-68. DISASSEMBLY OF LANDING GEAR SPRING CARTRIDGE ASSEMBLY. (Refer to Figure 6-18,
item 81.)
a. Remove the two handle-release bodies (86) from body (67).
b. Remove snap rings (82), buttons (83), springs (84) and plungers (85).
CAUTION
Take care when removing snap rings (82), cartridges are spring
loaded.
Revised: 10/12/83
HYDRAULIC SYSTEM
Effectivity
2C10
WIEBEL