Piper Navajo PA-31 Service Manual page 333

PIPER NAVAJO SERVICE MANUAL
6-53. TESTING RESERVOIR FOR LEAKAGE.
a. Remove the filler and drain tee or drain fitting as applicable, and attach a test unit and 150 psi
gauge to the filler or drain port.
b. Remove the cap from the reservoir vent fitting at the top of the reservoir and operate the test
pump until the reservoir is completely full, as indicated by fluid coming out of the fitting.
c. Cap the reservoir vent fitting.
d. Operate the test hand pump very slowly until the pressure gauge indicates 15 psi maximum.
e. Check for leaks. There should be no external leakage.
f. Crack the vent fitting to release pressure, remove the test equipment, drain the reservoir, and cap
the fittings.
g. The hydraulic Power Pack is now ready to be installed in the airplane.
6-54. INSTALLATION OF POWER PACK. (Refer to Figure 6-5, 6-6 or 6-7.)
a. Reach through the forward baggage compartment, position the Power Pack within its mounting
brackets (6) and install the belts (7) that attach it to the mounts.
b. Uncover and connect the various hydraulic lines to the Power Pack.
c.
Connect the gear selector control (13) to the control arm (II) on the Power Pack.
d.
Connect the electrical connector (8) at the forward side of the Power Pack.
e. Fill the reservoir with MIL-H-5606 hydraulic fluid by attaching a hose from a pressure tank to
the filler fitting of the Power Pack. (Refer to Filling Hydraulic Reservoir, Section II.)
f. Bleed the hydraulic system (refer to Paragraph 6-107) and check for fluid leaks.
g. After bleeding the hydraulic system, it may be checked as described in Paragraphs 6-9 through
6-16.
h. Install the access panels.
Reissued: 10/12/79
Effectivity
OZONE
HYDRAULIC SYSTEM
2C3