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 1.
Pipe
5.
Breatner
9.
Gasket
2.
Nut
6.
Screen
10.
Valve (inner)
3.
Flange
7.
Guide
11.
Valve seat
4.
Clamp
8.
Spring
12.
Valve (outer)
Figure 3-21. Crankcase breather, cross section.
(2) Remove the capscrews securing breather (5) to
(4) Inspect the springs for loss of tenson. Replace a
i
scavenging pump housing (from inside housing). Remove
weak or broken spring.
breather (5) and pipe (1), then place this assembly on the
d. Reassembly and Installation.
workbench.
(1) Install screens (6) in positions from which they were
(3) Remove nuts (2) from capscrews and separate
removed.
guide (7) from valve seat (11).
(2) Install breather (5) on housing and tighten the
(4) Remove spring (8), valve (inner) (10) and valve
capscrews. Replace clamp (4) and tighten the clamp bolt.
(outer) (12). Lift off gasket (9). Use a new gasket at
(3) Replace springs (8), gasket (9), valve (inner) (10),
reassembly.
valve (outer) (12), valve seat (11), and guide (7). Tighten nuts
(2) on capscrews.
(4) Install flange (3) and tighten nuts evenly.
NOTE
The breather is fitted with three screens;
3-18. Engine Fresh Water Pump
two coarse, one fine. Tag the screens for
a. General. The reversible centrifugal fresh water pump
reinstallation identification.
(10, fig. 3-18) is located at forward end of the engine and
driven by the oil and water pump drive gear. The fresh water
(5) Remove screen (6) from breather (5).
pump circulates fresh water through the engine water jackets,
c. Cleaning, Inspection, and Repair.
exhaust manifold, and heat exchanger.
(1) Wash screens and all parts in clean fuel oil and
b. Removal.
blow dry with compressed air. Inspect screens, if damaged,
(1) Close inlet valve (fig. 3-22), then drain the
replace them.
expansion tank and engine cooling system (table 2-3).
(2) Inspect the valves. Replace a bent or damaged
valve.
(3) Inspect valve seats for warp. Replace a damaged
valve seat.
3-54
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