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OPERATOR'S DAILY 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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PUMP ASSEMBLY. - TM-55-1730-213-120010
TM 9-1425-600-34-5-2
29. JACK WILL NOT RISE TO CAPACITY HEIGHT.
PROBABLE CAUSE
POSSIBLE REMEDY
Fluid level low................................................................. Refill with fluid (paragraph 19) and check for leaks
Closed air vent assembly ............................................... Open air vent assembly (paragraph 13)
Sticking intake valve in pump assembly ........................ Pump rapidly to dislodge. Report to DS and GS main-
tenance if malfunction persists
30. RAM RISES AND FALLS DURING EACH STROKE.
PROBABLE CAUSE
POSSIBLE REMEDY
Release valve open slightly ............................................ Close valve (paragraph 13)
Pump assembly defective............................................... Replace (paragraph 37)
31. JACK WILL NOT HOLD UP LOAD.
PROBABLE CAUSE
POSSIBLE REMEDY
Valve leaking ................................................................. Tighten valve (paragraph 13)
Cylinder defective........................................................... Replace (paragraph 38)
Pump assembly defective............................................... Replace (paragraph 37)
32. JACK WILL NOT LOWER THE LOAD.
PROBABLE CAUSE
POSSIBLE REMEDY
Ram distorted ................................................................ Replace (paragraph 38)
Valve defective............................................................... Replace pump assembly (paragraph 37) or report to
DS and GS maintenance
33. JACK WILL NOT COMPLETELY CLOSE.
PROBABLE CAUSE
POSSIBLE REMEDY
Air under the ram............................................................ Bleed the system (paragraph 39)
Ram distorted ................................................................. Replace cylinder and ram (paragraph 38)
34. HANDLE STROKE PARTIALLY INEFFECTIVE.
PROBABLE CAUSE
POSSIBLE REMEDY
Air in pump chamber ...................................................... Open valve (paragraph 13) and pump rapidly
Air vent assembly closed ................................................ Open air vent assembly (paragraph 13)
Pump assembly screen clogged ..................................... Report to DS and GS maintenance
35. HANDLE MOVES UP.
PROBABLE CAUSE
POSSIBLE REMEDY
Air in pump chamber ...................................................... Open valve (paragraph 18) and pump rapidly
Pump assembly defective............................................... Replace pump assembly (paragraph 37)
Section VI. STRUCTURAL MEMBERS
(4) Remove leg (8) and spring (7) from shaft
36. LEG AND CASTER ASSEMBLY.
(5).
a. Disassembly.
(5) Remove nut (4), washers (3), and bolts (2);
(1) Remove cotter pin (3, figure 3), washer (4),
separate shaft from caster (1).
and pin (5).
(6) Do not remove lubrication fitting (9) unless
(2) Remove leg assembly.
replacement is necessary.
(3) Compress spring (7, figure 4) and remove
retaining ring (6).
9

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