3.
Remove the valve from the filler plug.
4.
Fully compress the piston and fill the strut with fluid until it comes level with the hole for the valve.
5.
Remove the valve core and install the valve with a torque of 350 to 400 inch-pounds.
6.
Attach one end of a clean plastic hose to the valve and submerge the other end well into a container of hydraulic fluid.
— Note —
An air tight connection is necessary between the plastic tube and the valve stem. Without such a connection, a small amount of air will be sucked into the oleo strut during each sequence, resulting in an inordinate amount of air bubbles and prolongs filling operation.
12-20-00 Page 12-14 Revised: February 28, 2002
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7.
Fully compress and extend the piston tube, thus expelling any air trapped within the strut chamber. By watching the fluid pass through the plastic hose, it can be determined when the strut is full and no air is present in the chamber.
8.
When air bubbles cease to flow through the hose, fully compress the piston and remove the hose from the valve stem.
9.
Reinstall the air valve core.
10.
With the airplane still on jacks, compress and extend the gear piston tube several times to ascertain that the strut will operate freely. The weight of the gear, wheel, and fork should allow the piston tube to extend.
11.
Clean off any overflow of fluid and inflate the strut with air to 200 psi.
12.
Remove the aircraft from jacks and check strut exposure for 2.6 ± 0.25 inches.
INFLATING OLEO STRUTS.
After making certain that an oleo strut has sufficient fluid. attach a strut pump to the air valve and inflate the oleo strut. The strut should be inflated until the correct inches of piston is exposed with normal static load (empty weight of the airplane plus full fuel and oil) on the gears. Rock the airplane several times to ascertain that the gear settles back to the correct strut position. (If a strut pump is not available, the airplane may be raised and line pressure from a high pressure air system used. Lower the airplane and while rocking it, let air from the valve to bring the strut down to the proper extension. Before capping the valve, check for valve core leakage.)
SERVICING STEERING BUNGEE.
At the specified frequency according to the Lubrication Chart the steering bungee must be serviced as follows:
1.
Remove the tunnel cover located in the forward compartment.
2.
Clamp the rudder pedals in the neutral position.
3.
Remove the nut, washers, and bolt that secures the steering bungee and the steering arm.
4.
Disconnect the bungee from the idler arm by removing the nut, washer and bolt.
5.
Remove the steering bungee from the aircraft.
6.
Cut the safety wire from the bungee retainer.
7.
Carefully remove the retainer and release the spring.
8.
Apply Aero Lubriplate to the spring and mounting hardware as specified in the Lubrication Chart.
9.
Compress the spring into the bungee tube and install the retainer securing with MIL-W-6713 Type 316 safety wire.
10.
With the nose gear in the neutral position, install the steering bungee into position. The primary web must be in the vertical position with the retaining clip facing down, safety wire on bottom side.
11.
Install the bolt, washers and nut that secures the bungee to the steering arm.
12.
Install the bolt, washer and nut that secures the bungee to the idler arm.
13.
Align the nose gear per Alignment of Nose landing Gear.
14.
Remove the rudder pedal clamps and check the operation of the steering bungee.
15.
Install the tunnel cover in the forward compartment with the attachment hardware.
12-20-00 Page 12-15 Revised: February 28, 2002
BRAKE SYSTEM.
The brake system incorporate a hydraulic fluid reservoir through which the brake system is periodically serviced. Fluid is drawn from the reservoir by the brake cylinders to maintain the volume of fluid required for maximum braking efficiency, spongy brake pedal action is often an indication that the brake fluid reservoir is running low on fluid. When found necessary to accomplish repairs to any of the brake system components or to bleed the system these instructions may be found in Chapter 32.
FILLING BRAKE CYLINDER RESERVOIR.
The brake cylinder reservoir should be filled to the level marked on the reservoir with the fluid specified in Lubrication Chart. The reservoir, located on the upper right hand side of the bulkhead in the nose compartment. should be checked at every 50 hour inspection and replenished as necessary, no adjustment of the brakes is necessary, though they should be checked periodically per instructions given in Chapter 32.
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