TM 5-2350-262-20-3
5
6
6
7
5
MAIN RELIEF VALVE ADJUSTMENT
NOTE
Have suitable container ready to catch oil.
Disable the ejector from the hydraulic system by disconnecting CONT VLV-21 hose (1)
from elbow (2) at port 21 and CONT VLV-22 hose (3) from elbow (4) at port 22 on ejector
control valve. Cap and plug hoses and fittings.
With pressure measuring device (5) and tee (6) still connected to HYDR-FLTR-IN 13L
hose (7) and high-pressure filter inlet port 13L and SPRUNG/UNSPRUNG lever in
SPRUNG, have assistant start engine and move left-hand SUSPENSION CONTROL lever to
RAISE, while at the same time, holding EJECTOR CONTROL lever in BACK. Read pressure
measuring device (5). Adjust the main relief valve 13L by loosening jamnut (8) and rotating
adjustment screw (9) clockwise to increase pressure;counterclockwise to decrease
pressure. When hydraulic pressure is within limits, tighten jamnut (8).
Stop engine; relieve hydraulic pressure.
Move test equipment to high-pressure filter inlet port 13R and repeat the previous steps
using the right-hand suspension control lever.
Stop engine; relieve hydraulic pressure.
3-71
