Skyjack SJ 4620 Service Manual

SKYJACK, Page 5SJIII Conventional Series
143911
Section 4 - Troubleshooting Information Service and Maintenance
Electrical System (Continued)
2. Contactor C1 defective.
Check contactor. Replace if defective. -
3. Defective pump motor DCM1.
Check motor. Replace if defective. -
4. Loose or broken wire #59 from relay 21CCR (ANSI/CSA) or relay 21ACR (CE) to proportional valve
coil 2H-59.
Check continuity. Replace if defective. -
5. Loose or broken wire #02 from proportional valve coil 2H-59 to base terminal block TB-1.
Check continuity. Replace if defective. -
6. Defective proportional valve coil 2H-59.
Check continuity through coil. Reading should be 19ohms. Replace if defective. -
4.1-3 All Controls Inoperative From Base Control Console
1. Loose or broken wire #07 from base terminal block to platform emergency stop switch S4.
Check continuity. Replace if defective. -
2. Open or defective platform emergency stop switch S4.
Close switch. Replace if defective. -
3. Loose or broken wire #7A from platform emergency stop switch S4 to base terminal block.
Check continuity. Replace if defective. -
4. Loose or broken wire #7A from base terminal block to base key switch S10.
Check continuity. Replace if defective. -
5. Open or defective base key switch S10.
Close switch. Replace if defective. -
6. Loose or broken wire #10E from base key switch S10 to base up/down switch S2.
Check continuity. Replace if defective. -
7. Loose or broken wire #10E from base terminal block TB-1 to CM1 control module pin P2-2. (CE)
Check continuity. Replace if defective. -
4.1-4 All Controls Inoperative From Platform Control Console
1. Loose or broken wire #8C from base key switch S10 to base terminal block.
Check continuity. Replace if defective. -
2. Loose or broken wire #8C or wire #02 from base terminal block to platform emergency stop switch
S4.
Check continuity. Replace if defective. -
3. Open or defective platform emergency stop switch S4.
Close switch. Replace if defective. -
4. Loose or broken wire #8 or wire #02 from emergency stop switch S4 to battery charge indicator
BCI.
Check continuity. Replace if defective. -
5. Loose or broken wire #8 or wire #02 from battery charge indicator BC1 to joystick S7.
Check continuity. Replace if defective. -
6. Defective joystick enable switch S7-6.
Check switch. Replace if defective. -
7. Defective joystick neutral switch S7-1.
Check switch. Replace if defective. -
8. Defective joystick S7.
Check joystick. Replace if defective. -

Skyjack SJ 4620 Specifications

General

Brand	Skyjack
Model	SJ 4620
Category	Boom Lifts
Language	English