Figure 11. Diesel Engine Driven Firefighting Pump Valve Locations (cont)

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Figure 11. Diesel Engine Driven Firefighting Pump Valve Locations

TM-55-1925-273-10-1 Inland and Coastal Large TUG (LT) NSN 1925-01-509-7013 (EIC XAG) Manual

Figure 13. Machinery DC Control Distribution Panel

TM 55-1925-273-10-1

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! CAUTION

The towing hydraulic system must always be in a normal operating lineup when the pump drive

engine is running or damage to the system could occur.

NOTE

The towing hydraulic system hydraulic pump is driven from the front of the pump drive engine.

Verify that the towing hydraulic system is lined up as follows:

OPEN the following valves:

(1)

GS-77, HYD OIL CLR DISCH (figure 12, item 1), hydraulic oil circulation discharge

(2)

GS-75, TOW WN HYD OIL CLR SPLY (figure 12, item 2), towing machine hydraulic oil circulation supply

(3)

CH-26, DRN CUT-OUT TOW WN HYDR (figure 12, item 3), towing machine hydraulic drain

(4)

CH-27, RTN CUT-OUT TOW WN HYDR (figure 12, item 4), towing machine hydraulic return

(5)

TH-1, C.O.V. PMP DISCH. TO TOW WN. HYD (figure 12, item 5), pump discharge to towing machine

hydraulics

(6)

TH-14, FLOW CONTROL (figure 12, item 6), pump supply cutoff valve

(7)

TH-13, FLOW CONTROL (figure 12 item 7)

(8)

TH-12, FLOW CONTROL (figure 12, item 8)

In AMS 1, on the starboard side, at the towing hydraulic reservoir, verify that the following valves are CLOSED:

(1)

TH-4, DRAIN CRSVR. TO CENT. HYD. (figure 12, item 9), cross connect drain valve

(2)

TH-3, RETURN CRSVR. TO CENT. HYD (figure 12, item 10), cross connect from towing hydraulics to

central hydraulics

(3)

TH-2, PRESS CRSVR CTL HYDR TOW WN HYDR (figure 12, item 11), crossover valve to the central

hydraulic reservoir

In the engine room on the aft bulkhead of the EOS, at the machinery DC control distribution panel, set the PMP DR

ENG circuit breaker to ON (figure 13, item 1).

Verify that all towing machine operating levers are in the NEUTRAL position at the towing machine operator's control

panel on the 01 level.

Start the pump drive engine by completing the following actions:

OPEN valve CA-6, STG AIR TO PMP DR ENG (figure 11, item 13), starting air to the pump drive engine.

Place the power take-off control lever in the disengaged (aft) position (figure 14, item 1).

Move the mechanical governor control lever (figure 14, item 2) to the half engine speed position (approximately

straight up).

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