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Section IV. PREVENTIVE MAINTENANCE SERVICES
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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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JACK WILL NOT RISE TO CAPACITY HEIGHT.
TM 9-1425-600-34-5-2
normal operations of the equipment. Reduce interval to compensate for abnormal conditions. Defects or unsatisfactory
operating characteristics beyond the scope of the operator to correct must be reported at the earliest opportunity to
organizational maintenance. Responsibility for performance of preventive maintenance services rests not only with the
operator, but with the entire chain of command from section chief to commanding officer (AR 750-5).
25. OPERATOR'S DAILY SERVICES.
INTERVALS
PROCEDURE
Before
During
After
operation
operation
operation
X
X
Visual inspection. Make general inspection of the entire jack for obvious defi-
ciencies, such as fluid leaks, loose or missing bolts, nuts, and any damage
that may have occurred since the equipment was last operated. Correct or
report any deficiencies to proper authority.
X
Fluid level. Check the fluid level in the reservoir and add fluid (paragraph 19)
as required.
X
X
X
Leaks. Check the pump assembly and the cylinder and ram assembly for signs
of leaks. Correct or report any deficiencies to proper authority.
X
X
Foot assemblies. Check the casters of the foot assemblies for free movement and
rotation of the wheels. Lubricate as required.
Section V. TROUBLESHOOTING
26. GENERAL.
The following paragraphs provide information useful in diagnosis and correction of deficiencies revealed upon
inspection, operation, or failure of the tripod hydraulic jack or any of its components. Each trouble symptom stated is
followed by a list of probable causes of the trouble. The possible remedy recommended is described opposite the
probable cause.
27. RAM WILL NOT RISE.
PROBABLE CAUSE
POSSIBLE REMEDY
Valve open .................................................................... Close valve (paragraph 13)
Fluid level low ................................................................ Refill with fluid (paragraph 19) and check for leaks
Air under the ram ........................................................... Bleed the system (paragraph 39)
Pump assembly screen clogged .................................... Report the malfunction to DS and GS maintenance
Intake ball bearing defective (7, figure 5) ....................... Replace pump assembly (paragraph 37) or report to
DS and GS maintenance
Discharge ball bearing defective .................................... Replace pump assembly (paragraph 37) or report to
DS and GS maintenance
28. JACK WILL NOT RAISE CAPACITY LOAD.
PROBABLE CAUSE
POSSIBLE REMEDY
Pump assembly defective .............................................. Replace (paragraph 37)
Ram defective ............................................................... Replace (paragraph 38)
8

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