TWIN COMA&HE C/R
back plates.
With the four
cap bolts removed,
it is possible to remove the main wheels by taking off the
dust cover and axle nut.
LANDING GEAR SERVICE
To raise the aircraft for servicing, use two hydraulic jacks and a tailsupport. Place about 300 pounds
of ballast on the base of the tail support before jacking the aircraft.
Landing gear oleos should be serviced according to instruction on the units. AI1 three oleos should be
extended until about two and threequarter inches of oleo strut extension is exposed in static position.
To add air to the oleo struts, attach a strut pump to the air valve and pump the oleo up to the proper
position. To add oil, release the air through the strut valve, and allow the strut to extend fully. Remove the
air valve and fti the unit through its opening. Compress the oleo to within onequarter inch of full
compression, allowing air and excess oil to escape. Reinsert the valve core and pump up the strut.
PROPELLER SERVICE
The air charge’in the propeller cylinder should be kept at the pressure specified on the placard located
in the spinner cap. The pressure in the cylinder will increase about one-third psi for every degree Fahrenheit
increase in temperature. This effect should be considered when checking pressure. The charge maintained
must be accurate and free of excessive moisture since moisture may freeze the piston during cold weather.
Dry nitrogen gas is recommended.
.
CHAMBER PRESSURE REQUIREMENTS
WITH TEMPERATURE
HC-E2Y L-2B
HC-E2Y L2BL
HC-EZYL-2BF
and
HC-E2YL-2BLF
Temp. “F Press. (psi) Temp. “F
:
Press. (psi)
loo 188 30 165
90 185 20 162
80 182
10 159
70 178 0 154
60 175
-10
152
50 172 -30 146
. .
HC-E2YG2BS
HC-E2YL-2BLS
HC-E2YG2BSF
and
HC-E2YL-2BLSF
Temp. OF
I+eS. (psi)
100 53
70 50
40
.’
47 ,
10 44
-20 42
NOTE: Do not check pressure or charge
with propeller in
feather position.
PAGE
6
HANDLING AND SERVICLNG
ISSUED: Jtie 1,197O
REVISED: August 27,1971
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