ARMY TM 5-5420-212-10-1
MARINE CORPS TM 08676A-10/1-1
(6) HYDRAULIC JACK 15T & 20T WILL NOT RAISE, HOLD POSITION OR LOWER
a.
Check release valve is tight enough.
b.
Check release valve is not stuck.
If valve is stuck, tap RH side of base at release valve position using hammer and block of wood.
c.
Check oil level.
If low, top up with oil then remove air by:
20 T Jack:
Tightening filler cap/dipstick and pumping jack until ram is raised to full extent.
Unscrewing release valve screw 1 to 11/2 turns and pressing ram down as far as it will go, then
tightening release valve screw.
Repeating until all air is expelled.
15 T Jack:
Remove air by depressing ball valve in filler cap/dipstick.
If air cannot be removed, replace jack and report condition to Unit Maintenance.
(7) HYDRAULIC JACK 15T & 20T SPRINGS UP AFTER BEING LOWERED OR FEELS SPONGY
a.
Air in system.
Remove air by depressing ball valve in filler cap/dipstick.
If jack operation still spongy, remove air by repeating c. in (6) above.
If air cannot be removed, replace jack and report condition to Unit Maintenance.
(8) PULLER JERKS WHEN LOWERING LOAD, OR WILL NOT PULL IN OR LET OUT CABLE
a.
Check for lack of lubrication and/or build up of earth, clay, etc.
Wash out puller and lubricate.
b.
Check for shiny cable, indicating puller not gripping cable properly.
Report condition to Unit Maintenance
If still not operating correctly, replace puller and report condition to Unit Maintenance.
(9) POST TENSIONING SLIDING BLOCK BINDS OR WILL NOT SLIDE IN POST TENSIONING ASSEMBLY
a.
Dirt and grease on sliding block and frame.
Clean frame and block.
b.
Bent flanges in frame.
Replace post tensioning assembly. Report condition to Unit Maintenance.
c.
Check for worn or damaged bearing strips on sliding block and post tensioner frame.
Replace post tensioning assembly. Report condition to Unit Maintenance.
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