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ProCore 648
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Electrical System
Solenoid Valve Coil
A solenoid valve coil on the hydraulic lift control manifold
(Fig. 41) can be replaced without opening the hydraulic
system.
Removal
1. Park machine on a level surface, fully raise coring
head, engage parking brake, stop engine and remove
key from the ignition switch. Secure coring head with
service latch.
2. Disconnect the wiring harness electrical connector
from the solenoid coil to be replaced.
3. Remove the nut from the spool assembly.
4. Slide the coil assembly from the spool assembly. Dis-
card the coil assembly.
5. Clean any corrosion or dirt from the spool assembly.
Installation
1. Slide new coil assembly onto the spool assembly.
2. Install the nut onto the spool assembly and torque
nut 5 ft–lb (6.8 N–m) (do not over tighten).
3. Connect the solenoid coil to the machine wiring har-
ness.
1. Solenoid valve coil (SVL)
2. Solenoid valve coil (SVQ)
3. Solenoid valve coil (SVR)
4. Nut
5. Nut
Figure 41
5 ft–lb
(6.8 N–m)
5 ft–lb
(6.8 N–m)
1
2
5
3
4