Specifications
RotorWay International
Exec 162F Maintenance Manual
49
Rev. 2 6/04
4. Check hub alignment every 100 hours. If the alignment falls within the prescribed limits, it is not necessary to re-shim
the hub. The stainless steel shims come in a variety of thicknesses, each with its own part number. When ordering
replacement shims, order the shim kit, part no. E49-6330. This kit contains 10 stainless steel shims (2 each of the
sizes listed below) plus 4 delrin shims, part no. E49-6281. This will give you a variety of sizes so that the exact
combination of shims can be chosen. (Refer to the rotor hub shimming procedure later in this section.)
PART NO. THICKNESS
E49-6344 .021"
E49-6346 .023"
E49-6347 .024"
E49-6348 .025"
E49-6353 .030"
5. Check hub alignment every 100 hours. If the alignment falls within the prescribed limits, it is not necessary to re-shim
the hub. However, the main drive pin must be removed and inspected carefully for grooves caused by contact with the
stainless steel shims. To remove the main drive pin without removing the shims, follow these procedures:
A. Remove the blades from the hub.
B. Remove the four (4) set screws located on the main shaft knuckle. (There are two set screws in each hole.)
C. Remove the snap rings (part no. E49-5131) and thin washers (part no. E00-4802) from both sides of the hub.
D. Carefully support the hub plate and drive out the main drive pin with a hammer and drift punch. Do not remove the shims.
E. Inspect the main drive pin. If any grooves or scratches are present, the pin must be replaced with a new one.
Otherwise, it may be re-used for up to 250 hours total time.
F. Place a small amount of grease in the hole and re-install the drive pin, thin washers, snap rings, and set screws.
H. Upon re-assembly, check to make sure that the hub is centered within .001 T.I.R. and that the hub pressure is 8
to 12 lbs.
6. Replacement of alignment bearing is as follows:
A. Remove thrust block assembly from the hub. CAUTION: Make sure all parts are marked before disassembly to
insure they are reassembled in their original location.
B. Remove the elastomeric bearing and thrust block liner.
C. Remove the dust cap (part no. E49-1331).
D. Press the old bearing out of the thrust block with a small press. CAUTION: The inner steel sleeve, not the outer
aluminum block, must be supported when pressing the bearing. The two pieces should not be moved relative to
each other. Failure to support the sleeve may cause it to press out of the block.
E. Clean the service area where the bearing makes contact with the thrust block.
F. Making sure the steel sleeve is supported as described above, press the new bearing (part no. E49-1340) into the
thrust block until it is even with the thrust block shoulder. (Refer to the rotor hub shimming procedure later in this
section.)
G. Replace the dust cap, liner, and elastomeric bearing.
7. Removal of Inboard and Outboard Pitch Pins:
A. Remove bolts part no. E00-2422 and part no. E00-2424.
B. Grasp outboard pitch pin (part no. E49-6310) with a pair of pliers and a soft cloth to prevent damaging the outer
surface of the pin. Pull directly outward removing the pin from the hub. NOTE: The pin should normally slide out
with very little pulling force, however, sometimes a light tapping motion with a plastic mallet must be used.
C. Tip the hub so it is at a 30 degree angle to the main shaft.
D. Insert a long punch and tap the inboard pin out. CAUTION: Try not to tap the thrust washer out at the same time.
If the washer does come out, clean all mating surfaces with acetone, apply Loctite and put the thrust washer back
in place. (It may be necessary to tap with a mallet to insure seating.)
E. Before installing the new pins, insure the holes in the hub are clean and free from dirt and grit. NOTE: Inboard and
outboard pitch pins are not interchangeable. The inboard pins are longer.
F. Lightly grease the pitch pins and insert the inboard pitch pin into the inboard hub hole. Keeping the flats of the pin
upward, insert the pin to .785 (± .005 inch) from the thrust washer. Reinstall bolt (part no. E00-2424) and torque.
Tighten locking nut securely.
G. Re-insert the outboard pin using the same procedure as the inboard pin but hold a tolerance of .750 (± .005 inch)
from the outboard edge of the hub. Tighten bolt (part no. E00-2422) and lock the locking nut. Torque as required.
H. Re-check distances: Inboard pitch pin = .785 (± .005). Outboard pitch pin = .750 (± .005).