3.
Remove the nose wheel well close out cover.
4.
Loosen the ban clamps around the cabin heater to allow access to the lower area.
5.
Remove the hydraulic retract cylinder aft mounting bolt.
6.
Remove the nose gear downlock spring.
7.
Remove the cotter pins, nuts and washers from the drag brace/wheel well attach points and push the bolts back into the wheel well far enough to allow the drag brace to be lowered.
8.
Remove the bolt which secures the hydraulic retract cylinder forward rod end to the nose gear downlock.
— Note —
Exercise caution to prevent the loss of the bushing located on the inboard (nut) side of the downlock hook.
9.
Remove the downlock hook to drag brace mounting pivot bolt and remove the downlock hook.
10.
Reach under the cabin heater unit and remove the nut from the downlock eccentric bushing mounting bolt and remove the bolt and bushing.
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THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
32-20-00 Page 32-46 Revised: December 6, 2002
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THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
INSTALLATION OF NOSE GEAR DOWNLOCK & ECCENTRIC BUSHING. (Refer to Figure 32-8.)
1.
Install the new eccentric bushing. (Refer to Figure 32-8 for proper assembly.) Since the eccentric bushing will require adjustment do not tighten the bolt in its final torque.
2.
Assemble the new downlock hook with hardware as installed in the hook being removed.
3.
Install the two stop bolts and bushings. The bolt heads must be installed outboard with one washer under each nut. Torque the nuts 40 to 45 in. lbs.
4.
Install the pivot bushing into the downlock hook and downlock arm. (Downlock arm must be installed with the nose of the arm sloping downward.) Determine that the bushing moves freely in the downlock hook and arm.
5.
Install the pivot bolt. Torque to 160 to 190 in. lbs.
— Note —
Proper installation of the downlock hook assembly and drag brace is as follows: Bolt, one washer, bushing through downlock hook and downlock arm, one thin washer, drag brace, two washers and one nut.
6.
Support the drag brace assembly and place the hydraulic cylinder rod end in position on the downlock hook assembly. Ensure that the bushing is installed on the inboard side of the downlock hook. Install the bolt with the head outboard. Place one washer under the nut and torque the nut 40-45 in. lbs.
7.
Slide the drag brace assembly into the wheel well and push the bolts out through the drag link on the left side and the drag link and downlock arm on the right side. Install a teflon washer next to the drag link, a large washer, a castlenut and safety with a cotter pin.
— Note —
A thin washer is installed between the downlock arm and the drag brace bearing. A bushing must be installed inside the bearing.
8.
Install the downlock spring with the open end of the spring at the downlock hook faring inboard.
9.
Allow the downlock hook assembly to seat over the eccentric bushing. Adjust the bushing to obtain daylight to .003 clearance between the bottom of the bushing and the downlock hook.
10.
After adjustment, retract the gear and torque eccentric bushing nut 40-45 in. lbs.
11.
Cycle the landing gear a minimum of three times to ensure proper operation and engagement. (It may be necessary to check the nose gear up/down micro switches for proper position. (Refer to appropriate section of Chapter 32.) Ensure that landing gear is in the down and locked position.
12.
Position cabin heater unit and secure.
13.
Install wheel well close-out panel.
14.
Close nose compartment and secure with four bolts.
15.
Remove the airplane from jacks.
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THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
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32-20-00 Page 32-48 Revised: December 6, 2002
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THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
ADJUSTMENT OF NOSE LANDING GEAR. (Refer to Figure 32-9.) The gear up stop is located on the steering bellcrank.
1. Place the airplane on jacks. (Refer to Chapter 7.)
— CAUTION —
FULLY DISENGAGE THE NOSE GEAR DOWNLOCK BEFORE RELEASING THE NOSE GEAR DRAG LINKS. WHENEVER AIRCRAFT IS PLACED ON JACKS TO MANUALLY RETRACT THE NOSE GEAR ASSEMBLY, DAMAGE COULD OCCUR TO THE DOWNLOCK IF NOT FULLY DISENGAGED.
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