8. Remove inner plunger bearings (Figure 1, Item 5) and ram bearing (Figure 1, Item 10) from plungers if
replacement is necessary.
Remove extension screw nut (Figure 1, Item 16) only if replacement is necessary.
10. Remove retaining ring (Figure 1, Item 21) and gaskets (Figure 1, Item 22 and 24).
Degreasing Solvent, MIL-PRF-680 is combustible and toxic to eyes, skin, and respiratory tract.
Wear protective gloves and goggles/face shield. Avoid repeated or prolonged contact. Use
only in well-ventilated areas (or use approved respirator as determined by local safety/industrial
hygiene personnel). Keep away from open lames or other sources of ignition.
Wash all parts in Degreasing Solvent, MIL-PRF-68080, and dry thoroughly.
Blow out passages with compressed air.
REPAIR OR REPLACEMENT
Replace gaskets, seals, and packing.
Replace parts worn beyond speciied limits, including scratched parts which cannot be restored without
Restore surfaces contacting packing with number Crocus Cloth, 600 , Federal Speciication P-C458 or
equivalent. Do not exceed allowable limits.
The quality of the original inish is shown in the table of limits. For example, 10 indicates 10
microinches root mean square.
Soak all preformed packings, backup rings, and felt in Hydraulic Fluid, Speciication MILH-6083 before
reassembly. Apply thin ilm of Grease to all unpainted surfaces.
Press extension screw nut (Figure 1, Item 16) into ram (Figure 1, Item 17).
Thread inner plunger bearing (Figure 1, Item 5) and ram bearing (Figure 1, Item 10) into outer plungers
(Figure 1, Item 6) and inner plunger (Figure 1, Item 11).
Install packing and backup rings in lower grooves of ram and plunger.
Install felts in groove above packing.
Install extension screw (Figure 1, Item 15) in ram.
Telescope the ram and plungers together by sliding the smaller into the larger from the bottom. Use caution
to avoid damaging the felt or packing.
Place lower gasket (Figure 1, Item 24) on cylinder and install reservoir assembly (Figure 1, Item 23).
Place the assembly of ram and plungers in the cylinder. Use caution with the packing and felt.
10. Place upper gasket (Figure 1, Item 22) and retaining ring (Figure 1, Item 21) over cylinder and install tripod
head (Figure 1, Item 4). Tighten head irmly against gasket with the lugs lining up with the feet position.