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I E. OH filter by-pass
If the filter or filtering cartridge is clogged, oil pressure increase leads to the opening of the by-pass which deviates oil flow. It is located near the filter or filtering cartridge.
F. Overpressure relief valve
The overpressure relief valve, located behind the last R.N. cylinder (in front of the rear table), controls the oil pressure by means of a calibrated ball by by-passing oil toward the engine sump.
I ABAA
Validity : S / N 1 - 9999 Page 2
79-20-00 (DA) JUL 99
A — Oil cooler
B — Oil cooler (option)
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I ABAA
Validity : S / N 1 — 9999 Distribution — Location of components
Figure 1
79-20-00 (DA) Page 3
JUL 99
Distribution — Location of components
Figure 2
ABAA
Validity : S / N 1 — 9999 Page 4
79-20-00 (DA) JUL 99
OIL COOLER
REMOVAL / INSTALLATION
1. REMOVAL OF STANDARD OIL COOLER (Figure 401)
A. Tools and consumable materials
- Blanking caps
B. Procedure
WARNING : PRIOR TO ANY OPERATION, ENSURE THAT THE ENGINE, EXHAUST PIPE AND MANIFOLDS ARE COLD. IF NOT, TAKE NECESSARY PRECAUTIONS TO AVOID SEVERE BURNS.
WARNING : PRIOR TO ANY OPERATION, ENSURE THAT THE KEY IS REMOVED FROM MAGNETO SELECTOR AND THAT "MAIN SWITCH" IS OFF.
IF AIRCRAFT IS EQUIPPED WITH DISCONNECT PLUG ON FIREWALL, DISCONNECT "MAGNETO DISCONNECT" PLUG AND CONNECT IT TO "GROUND MAGNETO FOR SERVICING" PLUG.
1) Remove the engine cowlings - refer to 71-10-01.
2) Drain the oil system - refer to 12-12-02.
3) Hold elbows (2) using a thin spanner, disconnect hoses (3) and (7). Blank off.
4) Hold cooler (1) and remove four nuts (4), washers (6), spacers (9) and threaded rods (5). Discard nuts (4).
5) Remove cooler (1).
6) Hold ends (8) using a thin spanner to remove, if necessary, elbows (2) from oil cooler. Blank off.
2. INSTALLATION OF STANDARD OIL COOLER (Figure 401)
A. Tools and consumable materials
- Loctite (TB 09-906)
- Cleaning agent (TB 11-003)
- Red paint
- Oil (TB 03-902)
- Clean lint-free cloths
- Torque wrench 0 to 450 lbf.in (0 to 50 N.m)
B. Procedure
WARNING : PRIOR TO ANY OPERATION, ENSURE THAT THE KEY IS REMOVED FROM MAGNETO SELECTOR AND THAT "MAIN SWITCH" IS OFF.
IF AIRCRAFT IS EQUIPPED WITH DISCONNECT PLUG ON FIREWALL, DISCONNECT "MAGNETO DISCONNECT" PLUG AND CONNECT IT TO "GROUND MAGNETO FOR SERVICING" PLUG.
WARNING : PRIOR TO ANY OPERATION, ENSURE THAT THE ENGINE, EXHAUST PIPE AND MANIFOLDS ARE COLD. IF NOT, TAKE NECESSARY PRECAUTIONS TO AVOID SEVERE BURNS.
ABAB
Validity : S / N 1 - 1822,1824,1825,1827 - 1842 Pre-Kit OPT10 923500 79-20-01Page 401
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