Re-plumb using plumb wire

Check seal to make sure load ring is installed correctly. The tapered end of the ring should rest against the chamber of the actual seal.

Request that D.L.M. send a new wear band with thickness at low limit.

Request that D.L.M. send a new wear band with thickness at low limit. A low friction oil additive could also be tried. Schindler spec. 54605ME

Lines should come within 1/8" of meeting up. If lines are past meeting up, do not back off joint (this may cause joint to loosen and come apart).

Dress threads using thread file designed for 8-pitch UNC thread. Tool TD338 available.

Make sure both cylinder and plunger are plumb (at least aligned with each other).

Remove head, check oil for contamination (use pump and filter if necessary as well as magnet to fish for chips). Chips may come from field installed hatch pipe and fittings, always clean pipe thoroughly before installing.

Replace wear band

Always blend joint before running jack.

If damage is not severe, plunger may be repaired by smoothing with sandpaper, if scoring is deep, new plunger section(s) will be needed, as well as a new sleeve and seal kit.

Order a stop sleeve to reduce overtravel.

First, check to see if a plunger extension would solve the problem. (Need to be sure over- travel and undertravel would still be sufficient.) If extension won't work, then either a new jack section (for multi-pc) or a new jack (for a one-pc) must be ordered.

Rotate plunger to locate "flat spot" on plunger plug next to cylinder wall.

Solution: Make sure plunger and cylinder are both plumb, and in alignment with each other.

Cut coupling off. Request new coupling from D.L.M.

Slide coupling away from joint, and test fit split ring sections against the cylinder wall (in their normal location) if the split ring does not fit snugly along its entire length, its shape may be corrected by tapping with a mallet. If the condition is too severe to be corrected in the field, request D.L.M. to send a new pair of split ring halves.

If coupling can be backed off, do so, and repair thread with a thread file. Also inspect for debris which may be contributing to the problem. If coupling seized up when partially engaged, it should be cut apart to remove. in this case, request D.L.M. to send a new coupling.

See orange warning label near cylinder joint - gap between male and female couplings should be about 1/8" and wide yellow painted line segments should line up within 1/2" when fully tightened.

If feet are located to high on cylinder, an additional set can be welded on in the field by a certified welder. In this case order new feet and gussets from D.L.M. If the current feet are in a location which would prevent new feet from being welded on correctly, the field may choose to use a spacer block between the footer channel and the feet. If the feet are too low on the cylinder, they will need to be removed by grinding, before welding new feet on.

The purpose of the stop ring is to limit current travel. typically it is to be located at the lowest plunger joint, and is sometimes used together with a stop sleeve which further limits travel. After determining which joint the stop ring should be placed at, slip the ring over the male coupling at that joint so that the 15 ° bevel on the underside of the ring matches the 15 ° bevel on the plunger. The mating plunger section can be lowered into position and assembled with the stop ring sandwiched between the two sections.

Check that the nut cannot be rotated in the female coupling. also check that the nut cannot be pushed up into the plunger more than about 1/16". Call 800 or 888 number stated on the jack if either of the two tests above indicate problems.

1. Adjust. 2. Find means to reduce the temperature. 3. Add anti-chatter additive. exp max glide. make sure additive is safe for o-rings.