Specifications

RotorWay International
Exec 162F Maintenance Manual
29
Rev. 2 3/03
5. Check the high temp fan for stress cracks on blades. Do not confuse stress cracks with excess resin cracks. Stress
cracks will penetrate the fiberglass and resin cracks will be on the surface only.
6. Check pulley for wear of anodizing and for chip or sand erosion. For bearing replacement do the following:
A. Remove the fan pulley assembly by loosening the set screws, removing the snap ring and lowering the pulley. It
may be necessary to use a puller, as the pulley was originally assembled using Loctite. If necessary, use a file or
fine sandpaper to remove the burrs on the shaft from the set screws.
B. Remove snap rings on both sides of the pulley bearing.
C. Heat the pulley in oven at 250 to 275 degrees F. CAUTION: Do not exceed 300 degrees.
D. Note which end of the bearing has the set screws, so that the new bearing will be installed in the same position.
Lightly press out the old bearing with a press or vise.
E. Clean the pulley inner surface with acetone and then clean the new bearing.
F. Again reheat the pulley to 250-275 degrees F.
G. Insert snap ring into the pulley groove and make sure it is seated.
H. Place the pulley on a flat surface and apply a thin coat of Loctite #609 to the inner surface of the pulley and the
outer surface of the bearing.
I. With the bearing in the correct position, lightly press the bearing into the pulley until the bearing contacts and sits
against the snap ring. CAUTION: If a press is required, make sure you press against the outer race of the bearing
and
not the inner race.
J. Replace the second snap ring in the pulley and let air cool. NOTE: Use Loctite upon final assembly of this part to
the secondary shaft assembly.
7. The fan pulley bearing, part no. E23-1221, is removed at 100 hour intervals for lower secondary shaft inspection. The
bearing must be replaced at 100 hours; do not re-use the old bearing. See Service Note 10-2B and 10-6 above.
8. For removal of rear oil seal:
A. Remove chain and secondary shaft.
B. With heat gun or propane torch, heat surrounding area where glue exists. CAUTION: Use only enough heat to
pop the seal out with a screwdriver.
C. Clean the lower oil bath pan with acetone and lightly sand any glue or uneven protrusions from the pan.
D. Sand mating surface of the seal with 400 grit paper and clean with acetone. CAUTION: Do not touch the rubber
seal with sand paper.
E. Mix blade glue at the proper ratios and apply to both parts.
F. Place a little oil on the rubber seal and shaft.
G. Slide the oil seal down (correct side up) pressing down with light finger pressure until the seal seats on the oil
bath. Oil seal pressure must be applied evenly.
H. Wipe off excess glue with a dry rag. Let the glue cure for 12 hours.
9. Refer to print E49-2001 and chain installation instructions in the Construction Manual. Chain tension should be set to
1/2 inch movement at 10 pounds pull with a spring scale midway between sprockets. Re-check chain tension at every
25 hour inspection. Some stretching of the chain normally occurs after the first 25 to 30 hours of operation. A shim (no
more than .025 inch) may be added between the lower mainshaft bearing flange and the airframe tube to achieve the
correct chain tension. The shim should be removed upon installation of a new chain. NOTE: Shims should ONLY be
added between the lower mainshaft bearing flange and airframe to correct for chain stretching. Initial chain tension is
achieved by adding shims at the secondary shaft bearing mount locations.
10. Refer to Service Note 10-6 for bearing removal procedure. Also refer to the Construction Manual and print E27-2000.
11. Inspect at every 100 hours. Grease at every 500 hours. Remove pop rivets on the end of the clutch spring tube and
unbolt the rod end from the clutch arm casting (part no. E27-5100). Remove the clutch tube piston (part no. E27-
6131). Make a visual inspection for wear. Grease the piston and clutch spring tube. Compressing the piston a slight
amount, install two pop rivets in the existing rivet holes. Reconnect the clutch arm casting and check for smoothness
of operation.
12. Remove the pulley mounting arm bolt (part no. E00-2522). Place a thin film of grease on the bolt and mating surfaces.
Reinstall the bolt and tighten it enough to allow the swing arm to pivot.