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JACK WILL NOT RISE TO CAPACITY HEIGHT.
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TM-55-1730-213-12 Jack Hydraulic Tripod 12-Ton Fixed-Height Part No. 1214-151 Manual
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Figure 5. Pump Assembly.
TM 9-1425-600-34-5-2
(5) Remove  the  fulcrum  (1,  figure  5)  by
b. Cleaning.
disconnecting links (2) and pins (4).
WARNING
(6) Remove plunger (6), plug (11), cotter pin (12),
and ball (7).
USING  TOXIC/FLAMMABLE  MATERIALS.
Due to the toxicity and flammability of the
(7) Pry out wiper (10), backup ring (9), and
solvents and solutions used in the cleaning
preformed packing (8).
procedures, adequate ventilation shall be
(8) Remove packing (14), spring (15), screen (17),
provided.
Avoid prolonged contact with
and ball (16).
solutions and chemicals.
Do not use
(9) Unscrew the valve assembly and press out pin
drycleaning solvent or flammable cleaners
(18).
near open flame or in areas where high
(10) Remove screw (20), packing (21), spring (22),
temperatures prevail.
and needle (23).
(11) Remove packing (24), from body (25).
(1) Wash all parts except casters in drycleaning
solvent,  Federal  Specification  P-D-680,  and  dry
b. Cleaning.
thoroughly.
WARNING
(2) Blow out passages with compressed air.
USING TOXIC/FLAMMABLE MATERIALS. Due
to the toxicity and flammability of the solvents
c. Inspection.
and solutions used in the cleaning process,
(1) Check painted surfaces for deterioration.
adequate ventilation shall be provided. Avoid
(2) Tubes for bending.
prolonged  contact  with  solutions  and
(3) Shaft for scoring on rubbing surfaces and
chemicals. Do not use drycleaning solvent or
damaged threads.
flammable cleaners near open flame or in
(4) Caster for flat spots on wheel or damaged
areas where high temperatures prevail.
swivel bearings.
(5) Springs for weakness.
(1) Wash all parts in drycleaning solvent, Federal
Specification P-D-680, and dry thoroughly.
(2) Blow out passages with compressed air.
d. Repair or Replacement.
(1) Replace weak or damaged springs.
(2) Retouch or repaint all painted surfaces as
c. Inspection.
required. Restore unpainted surfaces with Parker Lubrite.
(1) Finish for corrosion or deterioration.
e. Reassembly.
(2) Linkage pivot holes for visible elongation.
(1) Bolt caster (1, figure 4) to shaft (5).
(3) Pins for wear grooves.
(2) Lubricate the shaft and inside of tube with
(4) Surface of plunger for scratches or nicks.
grease, MIL-G-10924.
Check diameter according to the table of limits (figure 6).
(3) Place spring (7) over shaft and assemble into
(5) Threads for damage.
tube.
(6) Spring (22, figure 5) load of 64 + 4 pounds at
(4) Compress spring and install retaining ring (6)
0.675 inch in length.
on shaft.
(7) Spring (15) load of 3/8 to 3/4 pound at 1
inch free length.
37. PUMP ASSEMBLY.
(8) Tips of needle (23) and body (25) for wear or
a. Disassembly.
scratches.
(1) Remove leg assembly (2, figure 3).
(2) Remove handle (1).
(3) Remove the two screws attaching pump to
cylinder base and lift off pump.
(4) Drain the hydraulic fluid through the pump
passage. Remove reservoir fill plug to speed up flow of
fluid.
10

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