PORT 8 CHECK VALVE FLOW TEST
Have suitable container ready to catch oil.
Stop engine; relieve hydraulic pressure. Disconnect LH 4 SPNSN UNIT-8 hose (1) from
check valve (2) at port 8 on No. 4 left actuator (3). Plug end of LH 4 SPNSN UNIT-8 hose
Connect drain hose to check valve (2).
While holding end of drain hose in container, have assistant start engine and move
SPRUNG/UNSPRUNG lever to SPRUNG mode. Observe for steady flow of oil from drain
hose. Vehicle should raise.
Stop engine; relieve hydraulic pressure and connect line.
NO. 4 LEFT
CHECK VALVE INSPECTION
Inspect check valve (2). Ensure arrow (4) points away from actuator (3).
Connect LH 4 SPNSN UNIT-8 hose (1) to check valve (2) at port 8.