PIK-20 E Service manual
A
4.2.4 Notes in powerplant maintenance list
Note 1 Propeller bolts
Propeller bolts tightness should be 15 to 17 Nm. See Propeller
Manual.
Note 2 Propeller blade condition and track
For blade condition check, see Propeller Manual. Difference in
blade track should not be more than 3 mm measured 10 cm
from the blade tip at the trailing edge. See Propeller Manual.
Note 3 Play in propeller drive gear bearings
There should be no play in the bearings when moving the pro
peller blade back and forward. The bearings can be tightened
by adjusting the bearing nut located under the propeller. The
nut is tightened when turning counter-clockwise (left). Do not
bend the same lock washer tab twice. Do not overtighten the
bearings.
Note 4 Lubricating the propeller drive gear bearings
Remove propeller and the toothed drive belt (see Note 5).
Open the bearing nut by turning clockwise. Use an extractor to
remove the gear and bearings. Turn the gear while removing in
order not to defect the bearings.
Clean the bearings and check condition of bearings, gear
and shaft. Apply ball bearing grease and mount the gear.
The gear can be warmed to +50°C ( + 120°F) to easy the
mounting. Check that the back bearing is in right position. The
back bearing protecting plate can be sealed by using e.g. sili
cone glue.
When the gear is mounted, check that the back bearing in
ner ring is in the right position on the shaft.
Mount the drive belt and run the engine for a while and re
tighten the bearings when the gear has cooled down.
Do not overtighten the bearings. Check that the gear is tur
ning lightly.
EIRI KY
y
Kisällinkatu 8
SF-15170 Lahti 17
page 11-18
