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Cylinder and Ram Assembly. - TM-55-1730-208-130029
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TM-55-1730-208-13 Jack Hydraulic Part Number 50J25178 (TYPE B6) Manual
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Figure 1.
TM 55-1730-208-13
g. Bleed  hydraulic
jack
in
accordance
with
3-55. Foot Assemblies.
a. Position foot assemblies (figure 3-41 on legs (or
leg extensions) of tripod assembly and install bolts (I1
3-59. Hydraulic Jack Functional Testing.
and nuts (2).
The hydraulic jack shall be functionally tested after
b. Using sufficient manpower, place hydraulic jack
each reassembly to insure safe operation.
upright.
a. Turn ram lock nut assembly to top of ram and
3-56. Cylinder and Ram Assembly.
tighten retainer screw.
To install cylinder and ram assembly, position
b. Open vent assembly on reservoir and close
cylinder and ram assembly on tripod assembly and
release assembly on pump.
install bolts (1, 4, and 6, figure 3-3), lockwashers (2 and
c. Disconnect chain assembly on reservoir to free
7 , and nuts (3 and 5).
pump handle.
d. Apply test load (20,000 pounds) at ball socket of
3-57. Pump Assembly.
extension screw.
Install pump assembly (figure 3-2) on hydraulic jack
e. Operate pump handle until ram is fully extended
in accordance with paragraph 3-58, steps c through f.
and pump bypass is reached.
f. Hold pressure against test load for a minimum
3-58. Clamp Assembly.
of 15 minutes. Check for evidence of leakage at top of
a. Position clamp assembly (figure 3-1) on leg (or
cylinder. There shall be no apparent settling of ram.
leg extension) of hydraulic jack and close front half
g. Slowly open release assembly to lower ram into
clamp (6) and rear half clamp (7).
cylinder. When ram is fully closed, remove test load.
b. Install wing nut (1) on eyebolt (9).
h. Move pump handle to stowed position and
c. Position pump assembly on hydraulic jack and
connect chain assembly.
lock clamp cam (5) into lug at upper end of reservoir.
i. Close air vent assembly and release assembly.
d. Apply white lead (item 5, table 1-2) on threads
of hose fittings.
e. Install male connector assembly (40, figure 3-3)
on hose (39) and connect to cylinder and ram assembly.
f. Connect opposite end of hose to pump
assembly.
3-18

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