249
SJ82 T, SJ86 T
229040ABA
Manifolds and Hydraulic Pumps
Section 5 – Procedures
5.8-7 Fly Boom Relief Valve Adjustment
1.
Locate the GP2 port
1
on the main manifold
and remove the cap.
OR1
RV1
V5
V4
RV2
CV1
V7
V6
OR2
RV4
CV4
DSV2
CV5
DSV1
DSV3
GP2
RV3
SV3
Main Manifold
2.
Connect a pressure gauge (5000 psi) to the GP2
port.
3.
Start the engine from the base control console
and let it run for 2-5 minutes.
4.
Fully extend the boom and check the reading
on the gauge. The pressure should be 1500 psi.
Follow the next steps for adjusting the pressure,
if needed.
5.
Locate the fly boom relief valve RV4
2
.
6.
Loosen the lock nut on the fly boom relief valve
RV4. Turn the adjusting stem clockwise to
increase the pressure and counterclockwise to
decrease the pressure.
7.
Tighten the lock nut on the fly boom relief valve
RV4 once 1500 psi is observed on the gauge.
You must fully extend the boom to activate a
pressure reading on the gauge.
5.8-8 Test Charge Pump Pressure on
Drive Pump
1.
Locate test port TP3
1
on the drive pump.
2.
Connect a pressure gauge (600 psi) to the test
port.
Drive Pump - TP3
3.
Start the engine from the base control console.
WARNING
To protect the gauge, do not activate any controls
during this procedure.
4.
Check the reading on the gauge. Standard
pressure should be 313 ±31 psi.
5.
Replace the charge pump relief valve RV10
2
if
the standard pressure is not achieved.
6.
Repeat steps 2, 3, and 4 after the charge pump
relief valve is replaced.
7.
If the pressure is still not in range, repair or
replace the pump as necessary.
1
2
2
1
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