TM 55-1930-209-14&P-6
f.
Close (ON) switchboard hose reel circuit breaker P12 (Figure 3-10) supplying power to hydraulic unit, electrical
motor, and controls.
NOTE
Hydraulic power unit can also be started by pressing START push button on hydraulic unit
remote START/STOP switch located on deckhouse aft bulkhead portside.
g.
Push green START button on hydraulic power unit control panel located in void 5 (Figure 3-3 ). If motor does not
start, troubleshoot as given in paragraph 4-4.1.
h.
If initial. startup, check pump rotation as shown on identification plate.
i.
If initial startup, or if system has not been operated for several days:
Barge 1 - Allow pumps to run with winch hose control and levelwind control levers in neutral position for not
less than 5 minutes. This allows hydraulic oil to circulate at low pressure to remove entrapped air.
Barges 2 and 3 - Allow pumps to run with disc brake control in OFF position and winch hose and levelwind
controls in neutral position for not less than 5 minutes.
j.
Check for oil leaks and tighten fittings if necessary.
k.
Make sure charge pressure gauge (Barge 1 - Figure 3-4; Barges 2 and 3 - Figure 3-5) on hydraulic power unit
reads 250 psi. This is the minimum pressure needed for proper stroke control and make-up flow for winch circuit.
I.
Check bias settings for piston pump stroke control. With winch control lever in neutral position on Barge 1
(Figure 3-1) or OFF position on Barge 2 and 3 (Figure 3-2), compare readings between piston pump low pressure
gauge and high pressure gauge on hydraulic power unit (Figure 3-4). These gauges indicate pressure on two
sides of winch circuit. If the two readings differ, bias should be zeroed by adjusting zero adjustment screen
(socket-head screw) on end of stroke control on piston pump. This ensures that pump is fully destroked when
winch hose control lever is in neutral position.
m.
If winch drum is secured, release winch drum tiedown.
3-3.1.4 Deployment of messenger (tow) line
a.
Make sure hose reel is installed and held in place by pins on each side to workboat.
b.
Using workboat, carry end of messenger line to shore.
c.
Unwind messenger line by turning handcrank on starboard side of winch and attach messenger line to shore
winch. Leave enough slack so that workboat can back off from shore before line is taut.
d.
Deploy line from workboat reel using winch handcrank while moving toward barge.
e.
Attach messenger line bitter end to discharge hose pulling head assembly with shackle and shackle pin. Make
sure shackle pin has been secured with wire or cotter pin to prevent loss during deployment to shore.
3-13
