Service and Repair Manual

AN 01-25CN-2

PARAGRAPH 7

  h. Wet the packing cup on the cap, replace the shim, and screw the cap into the aft end of the cylinder.

  i. Check the piston for backlash. The motion of the piston must be adjusted to between .002 and .005 inch. Adjustment can be made by adding or removing a shim between the cap and cylinder.

  J . Slide the lug over the piston guide and onto the piston, line,up the piston hole with those in the lug, and insert the rear bolt. When the forward bolt is installed, be sure to install the position transmitter, linkage, eye bolt, and spacer before the washer and nut are replaced. Safety the nuts with cotter pins.

  k. Before installing the retracting strut in the airplane, test the strut for leaks. Use only hydraulic fluid (Spec. 3586) for this leak test, with the piston in the mid-stroke position. The strut must not leak at 2500 p.s.i. If there is no evidence of leakage at the end cap, end bushing, or the two hydraulic line pipe fittings, the strut is ready to reinstall in the fuselage.

  1. To install the retracting cylinder in the fuselage, reverse the procedure outlined above.

d. ELECTRICAL SYSTEM.

  (Drawing No. 87-55-1000.)
  (1) GENERAL-The electrical system is a single-wire grounded negative installation, including the wiring and equipment for ignition, generator, starter, electrical instruments, running lights, instrument and cockpit lights, gunnery equipment, landing gear-retracting, warning systems, and the electrically con. trolled propeller. The majority of electrical cables are carried in aluminum or flexible conduits. junction boxes or disconnecting plug~ are provided at all points of juncture of the electrical wiring to facilitate connection and replacement of the wiring.

  (2) IGNITION SYSTEM.-The ignition switch is mounted on the left side of the instrument board.

  (3) GENERATOR SYSTEM-Power is supplied to the electrical system by a type M-2 generator mounted on the left rear of the motor. The generator voltage regulator is accessible through the fuselage access door. The generator 'circuit is controlled by a switching relay and B5A switch on the main switch panel.

  (4) HYDRAULIC PUMP MOTOR.-The pump for the

hydraulic system is driven by an Eclipse 24-volt motor.

  (5) SWITCHES AND RHEOSTATS-The propeller switch circuit breaker and the three-way switch are located on the lower left side of the main switch panel. The gun switch, type is on the left side of the main switch board, and the gun trigger switch is located on the grip of the control stick. The hydraulic electric motor switch is located beneath the gun trigger switch.

  (6) ELECTRICAL BONDING.-All parts are bonded according to specification, and replacement should be made with clamps, bolts, metal strips, and pig tails similar to those provided in the original installation.

  (7) BATTERY.-The storage battery is accessible through the baggage compartment door. Provisions are made for the installation of either the British type battery cart plug, type E-1, or the United States Army Air Forces type plug.

  (8) BATTERY SOLENOID SWITCH.-A type B-5A switch on the main electrical panel controls the battery solenoid and must be closed before a current can flow through the electrical system.

e. FURNISHINGS.

  (1) DESCRIPTION.

   ;  (a) The pilot's seat installation is supported by two fittings on the cockpit floor and is adjustable for height. The pilot's seat also incorporates a non-skid type pad in the seat to prevent the pilot's parachute from slipping forward. (See Fig. 106.)

    (b) SAFETY BELTS.-A safety belt is attached to the, seat. The harness is bolted to the top of the bungee assembly which controls the movements of the shoulder straps. The release and locking control assembly handle for the shoulder straps is located on the left side of the pilot's seat. This control lever will release the locking pin in the bungee assembly and permit freedom of forward motion with only the bungee spring acting as a retaining force. To release the locking pin, push the control button down and pull the handle back until it is locked in its aft position. To lock the shoulder straps, return the bungee spring to its retracted position, release the control handle from its aft position, and pull forward until it is again locked in the forward position. (See Fig. 106.) The back cushion of the pilot's seat may be used as a life preserver.