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 (1) Secure the steering system and tag al
(3) Check the time it takes for rudder to
travel the 90 by using a stop watch. If the time of
switches to prevent operation of power unit while
working on the ram.
travel is greater than 12 seconds, notify general support
maintenance.
(2) Open the valve (13, fig. 5-122) to
prevent pressure being inadvertently applied to the
c.
Hydraulic Ram Packing and Grie Fitting
hydraulic ram.
Replacement.
12.
Valve, plug
1.
Cotterpin(4)
13.
Valve, aircylinder
2.
Nut (8
14.
Retainer, packing
3.
Nut (4)
15.
Preformed packing
4.
Stud (4)
16.
Pin, tiller shoe
5.
Cotterpin 14)
17.
Lubrication fitting
6.
Nut (4)
18.
Cotterpin (2)
7.
Capscrew (8)
19.
Lubrication fitting (2)
8.
Lubrication fitting (2)
20.
Bearing, sleeve
9.
Capscrew(4)
21.
Shoe, tiller
10.
Capscrew (12)
22.
Bearing, sleeve
11.
Lubrication fitting
Figure 5-122. Hydraulic ram assembly.
(3) Remove nuts and lockwashers securing
handtight. Be sure retainer is square with cylinder end.
the packing retainer (14) then move retainer away from
(8) Repeat steps (2) through (7) above on
cylinder.
the opposite ram.
(4) Use a packing hook to remove old
(9) After both rams have been repacked,
packing from end of cylinder.
close valve (13), then start the steering system (para 2-
(5) Install preformed packing (15) with small
diameter of rings pointing away from the cylinder, then
(10) Use the power steering unit to operate
use retainer to move packing into cylinder.
the rudder. Observe packing being checked-i.e., if
(6) Install a second preformed packing (15)
rudder is turning right, pressure is being applied to right
with small diameter of rings away from the cylinder, and
ram. Tighten nuts around retainer evenly until all
use the retainer to move packing into cylinder.
leaking stops.
(7) Position retainer (14) against packing,
(11) Vent the system, then repeat
install lockwashers and nuts, then tighten nuts
procedures of (10) above.
Continue venting and
tightening
5-176
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