Hydraulic System; Servicing Hydraulic System; 1C6; Servicing Hydraulic Pump Reservoir - Piper Lance II Service Manual

LANCE II SERVICE MANUAL
2-33. HYDRAULIC SYSTEM.
2-34. SERVICING HYDRAULIC SYSTEM. The general condition of the hydraulic pump
and landing gear actuating cylinders should be checked. Ensure that there are no leaks and
that the line fittings are tight. 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, and corrosion. Check the tightness of the attachment fittings.
The gear back up extender actuator assembly is located beneath the floorboard of center
seats and should be checked to determine that it is operating properly. The diaphragm shaft
may be operated by hand to make sure that it is free to fluctuate and that the actuating arm
and its components are operating freely. Check the pressure housing assembly for cracks,
breaks, or fatigue. Check to ensure that the hydraulic valve and fittings are free of leaks.
Repair and check procedures for the hydraulic pump, cylinders and various components
may be found in Section VI of this manual.
2-35. SERVICING 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 left side of forward 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. Should fluid be below this level,
loosen the vent screw and add fluid, MIL-H-5606, through the filler hole. Reinstall the filler plug
and tighten the vent screw.
NOTE
A small vent hole is located under the vent screw head.
Retain 1/64 inch clearance between the screw head and the
small vent hole.
2-36. LANDING GEAR SYSTEM.
2-37. SERVICING LANDING GEAR. The landing gear consists of tires, brakes and oleo
strut assemblies. These should be inspected for proper gear extension, scored piston tubes,
possible hydraulic fluid leakage, security and condition of all connection points. Check the
brake linings for wear and frayed edges, and brake discs for scoring. Replace if found
necessary. In addition, the gear should be checked for proper adjustment of downlock
hooks, looseness of drag links and side brace links. Minor servicing is described in the
following paragraphs, and for detailed service and overhaul instructions. (Refer to Section
VII.)
Revised 6/15/79
HANDLING AND SERVICING
1C6