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deterioration.
6. Install main gear fairing. (Refer to AMM 32-10)
Tire Inflation
For maximum service from the tires, keep them inflated to the proper
pressure. When checking tire pressure, examine the tires for wear,
cuts, nicks, bruises and excessive wear.
To inflate tires:
1. Remove inspection buttons on wheel pants to gain access to valve
stems. It may be necessary to move airplane to get valve stem
aligned with the access hole.
2. Remove valve stem cap and verify tire pressure with a dial-type
tire pressure gage.
3. Inflate nose tire to 40 +2/-0 psi (276 +15/-0 kPa) and main wheel
tires to 53 +2/-0 psi (365 +15/-0 kPa).
4. Replace valve stem cap and inspection buttons.
All wheels and tires are balanced before original installation and the
relationship of tire, tube, and wheel should be maintained upon
reinstallation. In the installation of new components, it may be
necessary to rebalance the wheels with the tires mounted.
Unbalanced wheels can cause extreme vibration in the landing gear.
Propeller Servicing
The spinner and backing plate should be cleaned and inspected for
cracks frequently. Before each flight the propeller should be inspected
for nicks, scratches, and corrosion. If found, they should be repaired as
soon as possible by a rated mechanic, since a nick or scratch causes
an area of increased stress which can lead to serious cracks or the
loss of a propeller tip. The back face of the blades should be painted
when necessary with flat black paint to retard glare. To prevent
corrosion, the surface should be cleaned and waxed periodically.
March 2010
Information Manual 8-19
Cirrus Design Section 8
SR20 Handling, Servicing, Maintenance
Oil Servicing
The oil capacity of the Teledyne Continental IO-360-ES engine is 8
quarts. It is recommended that the oil be changed every 50 hours and
sooner under unfavorable operating conditions. The following grades
are recommended for the specified temperatures at sea level (SL):
An oil filler cap and dipstick are located at the left rear of the engine
and are accessible through an access door on the top left side of the
engine cowling. The engine should not be operated with less than six
quarts of oil. Seven quarts (dipstick indication) is recommended for
extended flights.
To check and add oil:
1. Open access door on upper left-hand side of cowl. Pull dipstick
and verify oil level.
2. If oil level is below 6 quarts (5.7 liters), remove filler cap and add
oil through filler as required to reach 6-8 quarts (5.7-7.6 liters).
3. Verify oil level and install dipstick and filler cap.
• Note •
Installation of dipstick can be difficult. To aid in inserting
dipstick, point the loop of the dipstick towards the closest
spark plug (left rear, #2 cylinder), and use both hands to
guide, route, and insert dipstick.
4. Close and secure access panel.
Ambient Air Temperature (SL) Single Viscosity Multi-Viscosity
All Temperatures -— 20W-50
15W-50
Below 40° F SAE 30 10W-30
20W-50
15W-50
Above 40° F SAE 50 20W-50
15W-50
March 2010
8-20 Information Manual
Section 8 Cirrus Design
Handling, Servicing, Maintenance SR20
Approved Oils
For the first 25 hours of operation (on a new or rebuilt engine) or until
oil consumption stabilizes, use only straight mineral oil conforming to
Mil-L-6082. If engine oil must be added to the factory installed oil, add
only MIL-L-6082 straight mineral oil.
• Caution •
MIL-C-6529, Type II straight mineral oil with corrosion
preventive can cause coking with extended use and is not
recommended by Cirrus Design for break-in or post break-in
use.
After 25 hours of operation and after oil consumption has stabilized,
use only aviation lubricating oils conforming to Teledyne Continental
Motors (TCM) Specification MHS24, Lubricating Oil, Ashless
Dispersant, or TCM Specification MHS25, Synthetic Lubrication Oil.
The following products have supplied data to TCM indicating that
these oils conform to all the requirements of the above listed TCM
specifications:
March 2010
Information Manual 8-21
Cirrus Design Section 8
SR20 Handling, Servicing, Maintenance
Product Supplier
Aeroshell (R) W Shell Australia
Aeroshell Oil W
Aeroshell Oil W 15W-50
Anti-Wear Formulation Aeroshell 15W50
Shell Canada Ltd.
Aeroshell Oil W
Aeroshell Oil W 15W-50
Anti-Wear Formulation Aeroshell 15W50
Shell Oil Company
Aviation Oil Type A Phillips 66 Company
BP Aero Oil BP Oil Corporation
Castrolaero AD Oil Castrol Ltd. (Australia)
　
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