7/27/2019 35-03

1/1

DATE: REVISION:

VAN'S AIRCRAFT, INC.

10/13/09 1 RV-1

NOTE: On the left side of the aircraft the brake line fittings on the U-1203 Inboard Main Gear Attach Bracket are forward ofthe gear leg as shown in Figure 2. On the right side the inboard main gear bracket is flipped with the brake line fittings onthe aft side of the gear leg.

Step 2: To prevent rust, lightly coat the U-1202B Outboard Wear Plates and U-1203B Inboard Wear Plates with grease.

The U-1220-L and -R Gear Legs may be conversion coated (Alodined) and/or primed and painted but the gear legs must not bepowder coated or anodized.

Install the U-1203 Inboard Main Gear Attach Brack et, U-1203B Inboard Wear Plate, and U-1203C Doubler Plates as shown inFigure 2, leaving out the center bo lt and leaving the outside bolts loose. Install the U-1202

Outboard Main Gear Attach Bracket and U-1202B Outboard WearPlate, leaving the bolts loose. Slide the U-1220-L Gear Legbetween the outboard main gear attach bracket andthe outboard wear plate and the inboard main gearattach bracket and inboard wear plate andinsert the center bolt, washer and nut.When the leg is properly positioned, tightenall hardware. See Figure 2. Repeat theprocess for the U-1220-R Gear Leg.

U-1220-LU-1203

U-1203B

U-1203C

U-1202

U-1202B

AN4-22A,2 PLACES

AN6-24 AN365-524,2 PLACES

NAS1149F0563P,

2 PLACES

F-1204ASSEMBLY

2X

NAS1149F0663P

AN365-624A

AN5-20A,2 PLACES

FIGURE 2: ATTACHING THE MAIN GEAR LEGS

Step 3: Bolt the main gear axles and brake plates to the U-1220-L andU-1220-R Main Gear Legs with the provided hardware and check that the axlesare properly aligned using the C-1211 Align Blocks as shown in Figure 3. If needed, add shims to align theaxles properly (1/2and 1shims are available in the Van's Aircraft Accessories Catalog). See Figure 3.

Step 1: Apply a small amount of pipe thread sealant to the threads of the fluid fittings and install in the U-1203 Inboard Main GearAttach Brackets as shown in Figure 1. The angled fittings should be set at a 45angle to the top plane of the inboard main gearattach brackets. See Figure 1.

FIGURE 1: ADDING FITTINGS TO THE INBOARD MAIN GEAR ATTACH BRACKETS

U-1203F 179CA-4-2

AN816-4D

AN365-428

NAS1149F0463P

FIGURE 3: ATTACHING AND ALIGNING THE MAIN GEAR AXLES

FWD

CORRECT AXLE ALIGNMENT

FWD

INCORRECT (TOE IN)

INCORRECT (TOE OUT)

FWD

TAUTTHREAD

TAUTTHREAD UNWANTED GAP BETWEEN

STRING AND SPACER

UNWANTED GAPBETWEEN STRING

AND SPACER

C-1211,2 PLACES

TAUTTHREAD

AXLE

AXLE

AXLEAXLE

AXLE

AXLE

C-1211,2 PLACES

C-1211,2 PLACES

NAS1149F0463P,12 PLACES AN4-16A

AN365-4284X

AXLE

U-1220-RIF NEEDED

ADD U-811A 1ORU-811B .5SHIMS

BETWEEN AXLE ANDMAIN GEAR LEG.

BRAKEPLATE

APPLY THREADSEALANT

FIGURE 4: ADDING FITTINGS TO BRAKE ASSEMBLY (RIGHT SHOWN)

Step 4: Apply pipe thread sealant and attach the fluid fittings to the brak e as shown in Figure 4. Note that the brakes seach other when installed.

APPLY THREADSEALANT

APPLY THREADSEALANT

45.0

BLEEDER VALVE

BRAKE

AN823-4D

THESE PLANESPARALLEL