3-32
F-581-R1
TROUBLESHOOTING AND CORRECTIVE MAINTENANCE
To Check and/or Adjust Control Valve
Pressure
1.
First, review “
Before You
Begin,” page 1-1.
2.
Set the key switch to “OFF”, remove the key from the
ignition switch and disconnect the battery.
3.
For ease in checking pressure Landoll Service offers
a Pressure Check Kit (p/n: 0018152) which includes
a 3,000 psi (21 MPa) pressure gauge, hose and
quick-coupler.
4.
If you are using your own system, have shop rags
and a small container handy to collect oil spills.
Figure 3-22: Test Port
5.
Operate each function of the control valve briefly to
relieve system pressure - allow oil to drain. Connect
the pressure check kit quick-coupler (female end) to
the coupler (male end) on the test port on the
auxiliary pump.
6.
If you are not using the pressure check kit, remove
the quick-coupler and install an appropriate fitting to
accept your pressure gauge arrangement.
7.
Have rags handy to manage oil leakage.
8.
Install your 3,000 psi (21 MPa) pressure gauge
arrangement to the tee fitting.
CAUTION
9.
Start the truck.
10. To check and/or set pressure, you must pull the tilt
lever to bottom out (dead head) the cylinders and
build pressure, then set the relief valve.
Figure 3-23: Relief Valve
11. Loosen the relief valve jam nut. See Figure 3-23
12. Adjust the valve stem by turning clockwise to
increase pressure, counterclockwise to decrease
pressure. See Figure 3-23
.
13. Release the control lever immediately once the
pressure is set (2,600 psi, + 65 psi, - 0 psi; 18 MPa, +
0.45, - 0 MPa minimum, up to 3,000 psi; 21 MPa, +
0.45, - 0 MPa).
IMPORTANT
DO NOT hold the control lever (bottomed out) for
long periods of time. Excessive pressure is applied
to the circuit which can, over long periods of time,
damage internal components, overheating the
hydraulic oil.
14. If the pressure is low and cannot be adjusted to the
proper value, check the pump and make sure there
are no leaks in the hydraulic system.
15. If the pressure is too high and cannot be adjusted to
the proper value, replace the relief valve.
16. Tighten the relief valve jam nut.
17. Set the key switch to “OFF”, remove the key from the
ignition switch and disconnect the battery.
18. Operate the function control levers briefly to relieve
system pressure - allows oil to drain.
19. Remove the pressure gauge quick- coupler, or
remove your gauge arrangement and install the
quick- coupler.
20. Start the truck.
21. Lift and lower the mast from a few feet a few times to
check the hydraulic system for leaks.
22. Set the key switch to OFF and disconnect the battery.
23. Reassemble all items previously removed.
• All parts connected to the gauge port must be
capable of handling up to 3,000 psi (21 Mpa).
• To adjust pressure, the truck (pump) must be
running to create hydraulic pressure.
• Always pay attention and use caution when
servicing the truck while it is running.
TEST PORT
TEST PORT
HYDRAULIC PUMP
HYDRAULIC PUMP
Summary of Contents for Bendi B40i4
Page 2: ......
Page 26: ...1 20 F 581 R1 INTRODUCTION SAFETY AND INSPECTION...
Page 100: ...3 52 F 581 R1 TROUBLESHOOTING AND CORRECTIVE MAINTENANCE...
Page 120: ...4 20 F 581 R1 CALIBRATION AND PROGRAMMING...
Page 129: ...ENGINE WITH FUEL SYSTEM 5 9 Figure 5 10 Fuel System Troubleshooting...
Page 133: ...ENGINE WITH FUEL SYSTEM 5 13...
Page 134: ...5 14 F 581 R1 ENGINE WITH FUEL SYSTEM...
Page 140: ...6 2 F 581 R1 GM ENGINE SUPPLIER PROVIDED DOCUMENTATION...
