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 TM 55-1905-217-34
b. Removal.
(1) Remove engine room access hatch (para 2-7)
(2) Disconnect battery ground lead at battery.
(3) Drain coolant from engine.
(4) Drain lubricating oil from engine and transmission.
(5) Disconnect and tag all electrical leads at engine sending units.
(6) Disconnect and tag electrical leads to hydraulic starting solenoid on inboard engine for vessels with
hull numbers 8500 thru 8519, 8540 thru 8560 and 8580 thru 8618. In vessels with hull numbers 8520 thru 8539,
disconnect mechanical cable from pilot house at hydraulic start release Valve on inboard engine.
(7) Disconnect and tag electrical leads to alternator and regulator on inboard engines.
(8) Disconnect and tag electrical leads to electric starting motor and solenoid relay on outboard engines.
For vessels with hull numbers 8520 thru 8560 and 8580 thru 8618, also disconnect and tag electrical leads to starting
switch on center rear of propulsion units.
(9) Disconnect mechanical cable to quick start assembly at center rear of propulsion unit (hull numbers
8500 thru 8519 only).
(10) Turn off fuel valves on aft engine room bulkhead. Disconnect fuel lines at propulsion unit fuel
strainers. Cap fuel line fitting to prevent entry of dirt into line on hulls 8540 thru 8560 and 8580 thru 8618, fuel stop valves
are located in the lazarette.
(11) Disconnect and remove the water temperature thermo bulbs, the engine lubricating oil pressure gauge
line, the transmission oil pressure gauge line, and the mechanical tachometer drive shaft at the engine.
(12) Remove protective cover over ramp hoist hydraulic pump. Disconnect coupling between pump and
power take-off shaft.
(13) Release and remove alternator and bilge pump drive belts. The alternator and bilge pump drive belts.
The alternator and regulator may be removed from the propulsion unit if desired.
(14) Disconnect raw water priming line from bilge pump(s) and raw water pump outlet line. Remove hoses
between raw water piping and raw water pumps. Remove water piping as necessary to allow clearance for propulsion unit
removal. On hulls 8540 thru 8560 and 8580 thru 8618, disconnect the fuel lines from the engine to fuel oil coolers.
(15) Remove bilge pump(s) and pump mounting brackets.
(16) Remove fresh water engine cooling system lines at expansion tank.
(17) Disconnect and remove engine control linkage from pilot house at propulsion unit.
from stacks and pipes for access to mounting flanges.
(19) Release pressure and secure hydraulic starting system. Disconnect and tag hydraulic hoses to
hydraulic starter, release valve, steering pump and starting pump.
(20) Remove crankcase drain hose bracket attached to deck at inboard engine (hull no. 8500 thru 8519).
(21) Loosen hose at propeller shaft coupling. Remove the nuts, lock washers, and bolts that secure the
propeller shaft flange to the transmission output shaft flange.
(22) Loosen the packing gland in the propeller shaft stuffing box and slide the propeller shaft back 6 to 8
inches to permit removal of the engine without damaging the flanges.
(23) Remove the nuts and lock washers securing the propulsion unit to the foundation.
(24) Using appropriate materials handling equipment, carefully raise the propulsion unit approximately 6
inches. Make sure all lines and cables are free before continuing to remove the propulsion unit for the boat.
WARNING
During engine removal operations instruct personnel to stay clear of engine and
hoisting equipment.
(25) Move propulsion unit to a suitable work area.
(26) Replace engine base if necessary.
c. Installation. Reverse procedures in b above upon completion of repairs.
2-9. Winch (Ramp Hoist)
a.
Removal.
(1) Lower ramp to ground if possible. If ramp cannot be lowered, be sure ramp is secured with the load
binders or with the chain hoists.
(2) Remove hoisting cable from winch drum.
(3) Clean connections, disconnect hydraulic lines, and cap open ends.
(4) Remove winch mounting nuts and bolts.
(5) Remove winch from hull--total weight is 1,070 pounds.
b.
Installation. Install the winch in reverse order of removal.
2-8
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