B - Ardiehl.de

MAIN RELIEF VALVE (Cont’d)
Checking the Main Relief Valve Without Auxiliaries
The tools listed will be needed to do the following
procedure:
MEL10003 – Hydraulic Tester
MEL10006 – Hydraulic Test Kit
Stop the engine.
Lift and block the loader. (See Page 1–1.)
Disconnect the hydraulic hoses (Item 1) [A] at the tilt
cylinder.
Connect the hydraulic tester to the tilt cylinder hoses [B].
Have a second person in the operator seat, with seat bar
in down position.
The hydraulic tester must be in the fully open
position before you start the engine.
Start the engine and run at idle RPM.
I–2024–0284
Push the tilt pedal at the top (toe) or bottom (heel) until
the hydraulic tester shows the correct fluid flow through
the flow meter.
Increase the engine RPM to maximum.
There should be 18.0 GPM (68,1 L/min.) free flow.
Turn the restrictor control, at the tester, to increase the
pressure until the main relief valve opens.
The correct pressure is 2700–2750 PSI (18617–18961
kPa).
If not, stop the engine.
Replace or adjust the main relief valve. (See Page 2–21.)
When an engine is running in an enclosed
area, fresh air must be added to avoid
concentration of exhaust fumes. If the engine
is stationary, vent the exhaust outside.
Exhaust fumes contain odorless, invisible
gases which can kill without warning.
W–2050–1285
–2–20–
A
B
1
P–01187
P–01193
853, 853H BICS Loader
Service Manual