Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 81 / 881

HYDRAULIC SYSTEM.
The hydraulic pump and landing gear actuating cylinders should be checked for leaks, tightness of line fittings
and general condition The cylinder rods are to be free of all dirt and grit. To clean the rods, use an oil soaked rag
and carefully wipe them, All the hydraulic lines should also be checked for leaks, kinks. corrosion and attachment
fittings for tightness and security, Repair and check procedures for the hydraulic pump, cylinders, and various
components may be found in Chapter 29.
HYDRAULIC PUMP/RESERVOIR.
The fluid level of the reservoir of the combination pump and reservoir should be checked every 50 hours by
viewing the fluid through the filler plug hole in the hydraulic pump. Access to the pump is through the panel at
the rear of the baggage compartment. To check fluid level, remove the filler plug located on the forward side of
the pump and ascertain that fluid is visible up to the bottom of the filler plug hole, except on the Oildyne pump,
observe the fluid level on the dipstick. Should fluid be below the hole or the recommended level on the stick,
loosen the vent screw and add fluid (See Note) , MIL-H-5606, through the filler hole until full. Reinstall the filler
plug.
— Note —
A small vent hole is located under the vent screw head. Retain .015 inch clearance
between the screw head and the small vent hole.
With regards to the Oildyne pump installed on aircraft S/N 44-95001 and up, the filler
plug is a combination vent screw/filler plug. To install, tighten to full tight and loosen
1 1/2 turns. These instructions are also placarded on the pump reservoir.
BATTERY.
Servicing of the battery which is through the panel of the baggage compartment, involves adding distilled
water to maintain electrolyte even with the horizontal, baffles, checking cable connections, and checking for any
spilled electrolyte that would lead to corrosion. A check for proper fluid level and presence of corrosion should
be conducted at intervals of 50 hours or 30 days, whichever comes first. When corrosion is found, at each 100
hour inspection or every 90 days, the battery should be removed from the box and the battery and box should be
cleaned. Removal, cleaning, and charging instructions may be found in Chapter 24.
INDUCTION AIR FILTER.
REMOVAL OF AIR FILTER.
The induction air filter is located on the right rear side of the engine compartment. and may be removed by the
following procedure:
1. Remove the upper cowling.
2. Release the fasteners, remove filter cover as applicable.
3. Remove the filter.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
1 2 - 2 6 - 0 1
Page 12-09
Revised: May 15, 1989
1D9
PIPER AIRCRAFT