Draining the purifier filters

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Figure 2-12. Lubricating oil purifier flow diagram.

TM-55-1925-204-12 TUG Harbor Diesel 1200 H. P. Steel 100 Ft Design 3006 Flight One FSN 1925-375-3003 Manual

Figure 2-13. Marine steering system arrangement.

(b) Remove bolts holding covers on filters,

located in the top of the frame cover. If an overflow

then remove covers.

of unpurified liquid is observed, the bowl is clogged and

must be cleaned (para. 5-48).

(d) Grip handle on top filter element

(i) When it is evident that unpurified liquid

pressure plate and lift top element out of each filter.

is not flowing out of the observation cup, and that bowl

and heater are operating satisfactorily, open control

valve (5) fully open.

NOTE

(j) With heater and bowl now warmed up,

A special lifter hook is placed in each

position valve (3) so that oil is directed through the

filter to assist in removal of lower

filters.

The unit is now delivering clean filtered

element.

lubricating oil to the reservoir.

(6) Bypassing the purifier filters. To bypass the

(e) Use special lifters and remove each

filters, position valve (3) so that oil is directed into

lower element. (f) Replace special lifters in each filter.

bypass line, leaving all other valves unchanged.

(g) Insert two new filter elements in each

(7) Draining the purifier filters.

filter with element pressure plate uppermost.

(a) Bypass the purifier filter (step (6)

(h) Install new gasket in each filter cover.

above).

(i) Position compression spring in each

(b) Position valve (6) to draw oil from filters

filter.

through filter drain line. When the pressure gage on the

(j) Install covers and tighten bolts.

inlet side of the purifier shows no pressure, the filters

(k) Purifier is now ready for operation.

are empty.

(9) Securing the lubricating oil purifier.

(a) Drain filters (step (7) above).

NOTE

(b) Close control valve (5).

While the filters are draining, the

automatic air vent permits air to be

then apply brake by pressing gradually oil the brake

plunger.

drawn into filters, thereby eliminating

their collapse by the vacuum created

2-14. Steering System Operation

by purifier pump.

a. Steering System Pilothouse Control.

(1) Starting.

(6) to draw oil from the reservoir.

(a) Align system by closing the two valves

(8) Changing filter elements.

at base of steering console (1, fig. 2-13) and the bypass

(a) Drain filters (step (7) above).

valve at steering unit.

2-33