Crafco EZ 500 Series II, Manual

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EZ 500 Series II Melter Part Manual
Chapter 8 Troubleshooting
©2019 by Crafco, Inc. All Rights Reserved………………...………………………………..……………...Troubleshooting 8-34
Pump Hydraulic Troubleshooting 8.4.2
Step Possible Cause If…
1
Does the coil magnetize when the din plug
amber light is “ON”?
•
Yes, go to Step 2.
•
No, remove the din plug, then remove the
coil by unscrewing the nut on the end of the
coil. With the coil removed reattach the din
plug and place a metal screw driver in the
center of the coil to see if the coil is
magnetic. If it is not, recheck the din plug is
plugged into the coil and the amber light is
“ON”. If still not magnetic replace the coil.
2 Is the relief pressure set correctly?
(Refer to
Fig. 8.6 Hydraulic Valve Pressure
Setting ) .
•
Yes, go to Step 3.
•
No, first turn “OFF” the Isuzu engine, then
remove one of the two hydraulic hoses
going to the pump hydraulic motor, cap off
the fitting on the motor and use a 3000 PSI
gauge with the proper JIC fitting, attach it to
the hose. Start the Isuzu engine, turn “ON”
the main power in the control box, pull the
wand trigger and read the pressure gauge.
If the pressure needs to be adjusted use
the pressure relief valve marked “RVP”,
loosen the jam nut and adjust the pressure
with the allen screw at the end of the relief.
Turn clockwise to increase pressure and
counter clockwise to decrease pressure,
then tighten the jam nut to lock pressure.
Next turn “OFF” the Isuzu engine, remove
the cap, pressure gauge and reattach the
hose.
3 Is the hydraulic flow correct from the
hydraulic pump?
(Refer to Table 8-31 Pump Hydraulic
Troubleshooting ).
•
Yes, call Crafco, Inc. and speak to a service
technician. You should have been able to
find the problem.
•
No, call a local hydraulic shop to see if they
can run a hydraulic pump flow test, using
the information in
Fig. 8.6 Hydraulic Valve
Pressure Setting.
Table 8-31 Pump Hydraulic Troubleshooting