Piper Navajo Chieftain PA-31-350 Service Manual page 424

NAVAJO CHIEFTAIN SERVICE MANUAL
e.
Screw the bleeder valve (12) into the bleeder adapter (13).
f.
Install washers (4) on brake bolts (3) with the countersink facing the bolt head, and install bolts
through bolt holes in the housing (15).
CAUTION
Washer countersink must face the bolt head or bolt failure may
result.
g.
Place the brake housing (15), with bolts in bolt holes, on a clean flat surface with the pistons
facing up.
h.
Install the snow shield (16) over the brake bolts (3) and against the brake housing (15). The rim
flange of the snow shield must be toward the brake stack and the cut out portion must be located between
the open arms of the housing (15).
i.
Place the torque tube (17) over the brake bolts with the open end of torque tube toward the
housing and against the snow shield.
j.
Install the pressure plate (8) with the wear pads up, over the torque tube with the thin section of
the pressure plate located at the top of the housing between the open housing arms.
k.
Install one rotating disc (6) over the torque tube.
1.
Install the stationary disc (7) on the torque tube with torque tube keys in key slots in the disc.
Place the second rotating disc (6) on the stationary disc (7).
m.
Install the back plate (5), with wear pads down, on the torque tube with bolts through bolt holes
in the back plate.
n.
Install self-locking nuts (2) on brake bolts (3). Draw nuts up evenly and torque to 120
inch-pounds.
CAUTION
Do not use impact or power wrenches to install or tighten brake
bolt nuts.
o.
Install the brake assembly on the airplane and secure with six mounting bolts.
p.
Connect the hydraulic brake line and bleed the brakes in accordance with paragraph 7-68.
q.
Apply and release brake pressure (600 psi) several times and check for proper brake action. The
rotating discs (5) should be free to rotate when brakes are released. Reapply pressure (600 psi) and hold for
15 to 30 seconds and check the brake assembly for fluid leaks. No leaks are permitted.
r.
Align the rotating disc tangs and install the wheel assembly. Adjust the wheel bearings and safety.
s.
Re-inflate the tire to operating pressure and remove the airplane from jacks.
Reissued: 9/23/80
LANDING GEAR AND BRAKE SYSTEM
2G9