Piper Arrow IV Turbo Maintenance Manual page 85

4. On Lycoming engines proceed as follows:
A. After the element has been replaced, tighten the attaching bolt 15 to 18 foot-pounds of torque.
B. Lockwire the bolt through the loops on the side of the housing to the drilled head of the
thermostatic valve. Be sure the lockwire is replaced at both the attaching bolthead and the
thermostatic oil cooler bypass valve.
RECOMMENDATIONS FOR CHANGING OIL.
The engine manufacturer recommends that the oil supply be drained and the entire sump filled with fresh
oil after each 100-hours of engine operation. Always start and warm the engine to operating temperature
before performing an oil change. While draining the oil, the screens should be removed from the crankcase
cover and cleaned thoroughly. If sludge deposits are heavy, subsequent oil changes should be made at shorter
intervals.
1. Note the following for Continental engines:
A. D e t e rgent oil that meets Continental Motors Corporation Specification MHS-24, is the only
recommended lubricating oil.
B. Use SAE-30 or 10W-30 below 40° F and SAE-50 above 40° F. When the average ambient air
temperature is approximately at the dividing line, use the lighter oil.
2. Note the following for Lycoming engine.
A. N o n - d e t e rgent oil that meets MIL-L-6082 specification is recommended by Lycoming. (See
Lubrication Chart.)
B. For use of detergent oil note the following: Also refer to the latest revision of Lycoming Service
Information No. 1014.
(1) In engines that have been operating on straight mineral oil for several hundred hours, a change
to additive oil should be made with a degree of caution, since the cleaning action of some
additive oils will tend to loosen sludge deposits and cause plugged oil passages. When an
engine has been operating on straight mineral oil and is known to be in excessively dirty
condition, the switch to additive or compounded oil should be deferred until after the engine is
overhauled.
(2) When changing from straight oil to compound oil, the following precautionary steps should be
taken:
(a)
(b)
(c)
WINTERIZATION PLATE.
(PA-28RT-201 Only.) For winter operations there is a winterization plate kit available. When the ambient
temperature is 50° F or less the plate is installed on the inlet opening of the oil cooler plenum chamber. When
the plate is not being used it can be stowed on a bracket, provided for this purpose, located on the oil cooler
plenum chamber.
(PA-28RT-201T Only.) The winterization plate is mounted on the firewall when not in use (temperature is
above 50° F). The plate is mounted to the oil cooler baffle when ambient temperature is 50° F or less.
PIPER AIRCRAFT
PA-28RT-201 / 201T
*MAINTENANCE MANUAL
Do not add additive oil to straight mineral oil. Drain the straight mineral oil from the
engine and fill with additive oil.
Do not operate the engine longer than five hours before the first oil change.
Check all oil screens for evidence of sludge or plugging and change oil every ten
hours if sludge conditions are evident. Resume normal oil drain periods after sludge
conditions improve.
1D13
12-10-12
Page 12-06
December 1, 1978