ARMY TM 5-5420-212-23
MARINE CORPS TM 08676A-23/3
All tests shall be carried out as detailed below.
(1) Acceptance Test
(a) Close release valve screw (1).
(b) Insert operating handle into quadrant, and pump jack until ram is fully extended approximately 12 in (300
mm). Trip valve has operated if jack can still be pumped after end of ram stroke. (Oil will only be
circulated back into reservoir. Some oil may appear at top of liner).
(c) Jack must pump freely throughout full stroke of operating handle.
(d) Open release valve and ensure that ram fully retracts; close release valve.
(e) Using the operating lever extend the ram approximately 2 in (50 mm), then position the jack under a test
rig and continue using the operating lever until the test rig load indicator reads 20 ton (the rated load for
the jack). Continue pumping until the load indicator reads 22 tons at which point the relief valve should
(f) Use the test rig to apply a further load of 3 tons making a total of 25 tons (which is the rated load plus 25%
excess). Maintain this for a minimum time of 15 minutes.
(g) Visually check for oil leaks at the following points:
1 Joint between housing (10) and base (9).
2 Quadrant shaft seal (56).
3 Release valve screw (1).
4 Suction valve screw (25).
5 Delivery valve screw (22).
6 Grub screw (28) and base plug (30).
(h) Open release valve and ensure ram fully retracts; close relief valve.
(i) Position jack beneath small load, between 2 and 4 tons, and extend ram approximately 6 in (152 mm).
Jack must support load for 20 to 30 seconds.
(j) Visually check for oil leaks as detailed in step (g) above.
(2) Storage Test
After successful completion of Acceptance test in (1) above, a two day storage test shall be carried out as detailed below.
An ambient temperature of 100oF (37.7oC) shall be maintained throughout the test.
(a) Check oil level and fill up if necessary.
(b) Tighten filler cap and remove any surplus oil from all external surfaces.
(c) Ensure that ram is fully retracted.
(d) Lay jack down on its side with filler cap UPPERMOST.