Flow Meter And Flow Meter Kit Installation And Testing - Doosan DX140R Shop Manual

FLOW METER AND FLOW
METER KIT INSTALLATION AND
TESTING
Checking regulator and pump output, to assess the output
balance between the front and rear pumps and to verify
operating adjustment of each regulator, will require installation of
a flow meter.
The After Sales Service department of the nearest local
DOOSAN dealer can assist you with these tests or, if you prefer
carrying out your own testing, they should be able to help in
putting together a hose and fitting kit (or the required dimensions
and specifications for hoses and fittings) to allow you to install a
flow meter downstream from the main pump assembly.
Installation and Testing Procedure
• Shut down engine and operate controls to release
hydraulic pressure from the accumulator.
• Vent the reservoir to release all pressure from the
hydraulic system.
• Remove guard panels from around the main pump
assembly.
• Disconnect the main pump discharge output line.
Install the input flange of the flow meter on the pump
end of the output line.
• Cap off the unused (input) end of the pump discharge
line with a blocking flange.
• Connect a premeasured length of hydraulic hose,
between the output end of the flow meter assembly
and the top of the reservoir. Use appropriate fittings
and adapter flanges to guarantee a pressure tight
seal.
Be sure to maintain even tightening torque
NOTE:
on all flange fittings. Use Loctite brand
"PST 545" (or an alternate manufacturer's
hydraulic system joint seal) if required, to
give an airtight seal.
• An assistant – who must remain at the operator's
control station at all times – should restart the engine
and run it long enough (at minimum rpm) to de-aerate
the system and warm up the engine and hydraulic
system to operating temperature.
Record the values of all test results in three columns, comparing
1) pump pressure (from the instrument panel display) with 2)
measured flow, in gallons or liters per minute, from the installed
flow meter.
Hydraulic System Troubleshooting, Testing and Adjustment
SP001942
Page 25