Main Landing Gear System
Early 170 Gear
PN 0541114 applicable thru SN 25611 is interchangeable R&L.
- Is interchangeable R&L.
- A hole is drilled through the center of the gear leg for the brake line clip, or dual dimples are used to secure either type of brake line clip.
- Both gear leading and trailing edges are symmetrical from the upper bend and tapering to the axle attach boss.
- Thickness is 5/8 but varies from .640 to .685
- The gear comes straight out and down to the axle attach on a straight line, also referred to as wheels aft.
- The weight is 29-30 lbs per leg.
Late 170B Gear
PN 0541118-2 and 0541118-3 sn 25612 and on
- -2 is right and -3 is left
- A dimple is used to support the brake line clip
- The gear has a straight leading edge facing forward
- The thickness is 11/16 but varies from .665 to .685
- The inside dimension from the center of the upper bend to the narrow end is approx 34-1/2″
- The narrowest point of the gear measured just above the axle attach boss is 1-1/2″
- The gear comes straight out and down to the axle attach on a straight line, also referred to as wheels aft.
- The weight is 29-30 lbs per leg.
Early Cessna 180 Gear (Used On 170’s)
PN 0741001-1, 0741001-2, 0741001-3, and 0741001-4
- -1 and -3 are left and -2 and -4 are right
- A dimple is used to support the brake line clip
- The gear has a straight leading edge facing forward
- The thickness is 11/16 but varies from .665 to .685
- The inside dimension from the center of the upper bend to the narrow end is approx 36″
- The narrowest point of the gear measured just above the axle attach boss is 1-7/8″
- On the -1 and -2 the gear comes straight out and down to the axle attach on a straight line, also referred to as wheels aft.
- On the -3 and -4 the gear comes out angled forward and down to the axle approx 2-3″ as compared to the -1 &-2, also referred to as wheels forward.
- The weight is 32-33 lbs per leg.
All the gear have serial numbers. The 170 gear will have a letter followed by numbers like Z345 while the early 180 gear will have a letter number mix like 1Y345. Later years went to the 6 digit serial number like 801123 The serial numbers are on the end or the inside of the axle attach area.
Late Cessna 180/185 Steel Gear
PN 0741001-5, 0741001-6, 0741001-7, and 0741001-8 , and approved STC SA00800SE. PN PP0741001-7 PP0741001-8. (PMA Approved)
- -5 and -7 are left and -6 and -8 are right
- The gear has a straight leading edge facing forward
- The thickness is .750 but varies from .745 to .760
- The inside dimension from the center of the upper bend to the narrow end is approx 36″
- The narrowest point of the gear measured just above the axle attach boss is 1-7/8″
- On the -5, 6, -7 and -8 the gear comes out angled forward and down to the axle approx 2-3″ as compared to the -1 &-2, also referred to as wheels forward.
- The weight is 36-37 lbs per leg.
NEW Titanium Gear
PN XP0741001-77 and XP0741001-88 Approved STC SA01087SE (PMA Approved)
- -77 are left and -88 are right.
- No dimple is used to support the brake line clip, bond clip.
- The gear has a straight leading edge facing forward.
- The gear has a constant thickness of .875 inches and is compatible with the PPonk beef up kit.
- The inside dimension from the center of the upper bend to the narrow end is approx 36″.
- The narrowest point of the gear measured just above the axle attach boss is 2.00″
- On the -77 and -88, the gear comes out angled forward and down to the axle approx 2-3″ as compared to the -1 &-2, also referred to as wheels forward.
- The Titanium gear is lighter, stronger, does not lose its spring, and does not rust or corrode.
- The weight is 22-23 lbs per leg.
Exceptions
In the mid 50’s the gear legs identified as heavy duty for the Cessna 180. PN 0741001-5, and 0741001-6 measured .700 to .710. This contradiction thus confused the issue and Cessna never admits to knowing about this anomaly. If you have a heavy duty gear on say a 1956 180 and need to replace a gear leg with a new heavy duty you will get a .750 non dimpled -7 or -8. The stiffness will be greater on the replacement leg so the plane will have a list that exceeds the 3-1/2″ service manual requirement. You will probably have to replace both gear.