79-22 Sight Gage
A. Removal
1. Drain engine oil per § 12-60.
2. Refer to Figure 79-3. Remove B563-2 sight gage from G689-1 tank assembly.
Discard o-ring; tape tank opening.
B. Installation
1. Refer to Figure 79-3. Remove tape and verify G689-1 tank assembly interior is
free of contaminants.
2. Lubricate (new) o-ring using A257-18 lubricant. Install o-ring on B563-2 sight
gage, and install gage in tank. Special torque gage per § 20-33.
3. Service engine oil per § 12-60.
79-30 Engine Oil Cooler
A. Removal
1. Drain engine oil per § 12-60.
2. Refer to Figure 79-3. Remove hardware securing F649-1 oil cooler to F309-1 box
assembly.
3. Support oil cooler without damaging oil cooler fins. Disconnect F723-2 and F723-
4 line assemblies from oil cooler and associated components; cap fittings.
B. Installation
1. Refer to Figure 79-3. Install hardware securing F649-1 oil cooler to F309-1 box
assembly.
2. Torque check associated oil cooler and engine unions per § 20-33.
3. Remove caps and connect F723-2 and F723-4 line assemblies to oil cooler and
associated components. Using backup wrench, special torque line nuts per § 20-33.
4. Torque stripe fittings per Figure 5-1.
5. Service engine oil per § 12-60.
79-40 Engine Oil Filter
Maintain engine’s oil system per RR300 OMM.
NOTE
During engine oil filter servicing, if filter is contaminated, replace
engine oil cooler and flush oil lines.
APR 2017 Chapter 79 Engine Oil System Page 79.7
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