4-20. HYDRAULIC SYSTEM FLUSHING (CONT)
Electrical tiedown straps, item 26, appx. E
Wiping rags, lint-free, item 19, appx. E
Hydraulic fluid, 10 gl, (37.9 l), item 13, appx. E
Dry cleaning solvent, item 25, appx. E
Front support legs lowered to first opening past stow position (para. 2-22)
Front of platform lowered onto front support legs and rear of platform lowered as far as possible (para. 2-19) and rear
Top step and first upper stair section (for accessing APU area) removed from gooseneck (para. 4-55).
Semitrailer parking brakes set (brake release valve pulled out) (para. 2-8).
Flush kit obtained from DS maintenance (appx. F)
General Safety Instructions
Hydraulic fluid may be hot if system has been in operation. Allow system to cool
before performing maintenance or severe injury to personnel may result.
Residual pressure may remain in hydraulic lines. Open fittings slowly to avoid
injury to personnel.
Hydraulic fluid may be absorbed through the skin. Wear long sleeves, gloves, and
goggles or face shield. If hydraulic fluid gets into the eyes, flush them immediately
with water and seek medical attention. If hydraulic fluid gets on skin, thoroughly
wash with soap and water. Wash hands thoroughly prior to eating or smoking.
Throughout the entire flushing procedure, continually check filter indicator on
system filter. If an indicator shows that the filter is contaminated, stop the
procedure and replace filter element; then, continue with flushing procedure or
damage to equipment may result.
Check fluid level in hydraulic tank. Do not allow fluid level to drop more than 2
inches (5 cm) below bottom line of FULL mark or damage to equipment may result.