Skyjack 4632 - Page 73

SECTION 4, Page 5SJIII Series - The Conventionals 129919
Troubleshooting Information - Electrical System
Probable Cause Remedy
4.1-7. No Down Function From Platform Controls (CE)
1. Loose or broken wire #13 from lift/drive select switch
(S5) to base terminal block (TB-1).
2. Loose or broken wire #13B from base terminal block
(TB-1) to down valve (2H-13B) or holding valve (2H-
13B-1 or 2H-13B-2).
3. Loose or broken wire #02 from base terminal block
(TB-1) to down valve (2H-13B) or holding valve (2H-
13B-1 or 2H-13B-2).
4. Defective down valve coil (2H-13B) or holding valve
coil (2H-13B-1 or 2H-13B-2).
1. Check continuity. Replace if defective.
2. Check continuity. Replace if defective.
3. Check continuity. Replace if defective.
4. Check continuity. Replace if defective.
1. Loose or broken wire #13 from Lift/Drive Select Switch
(S5) to base terminal Block (TB-1).
2. Loose or broken wire #13 from Base Terminal Block
(TB-1) to Down Valve (2H-13).
3. Down valve coil (2H-13) defective.
4. Loose or broken wire #2 from Down Valve Coil
(2H-13) to Base Terminal Block (TB-1).
5. Loose or broken wire #13 from Down Valve Coil
(2H-13) to Lift Cylinder Holding Valve(s) (2H-13-1)
and (2H-13-2).
6. Defective Lift Cylinder Holding Valve Coil(s) (2H-13-
1) and (2H-13-2).
7. Loose or broken wire #02 from Lift Cylinder Holding
Valve Coil(s) (2H-13-1) and (2H-13-2).
1. Check continuity. Replace if defective.
2. Check continuity. Replace if defective.
3. Check continuity through coil. Replace if defective.
4. Check continuity. Replace if defective.
5. Check continuity. Replace if defective.
6. Check continuity through coil. Replace if defective.
7. Check continuity. Replace if defective.
1. Open Diode (D14E-2). (CE) or (D14)
ANSI-CSA
1. Check diode. Replace if defective.
4.1-8. No Down Function From Platform Controls (NOTE: Down Function Is Not Proportionally Controlled)
4.1-9. Platform Lifts Slow From Platform Controls And Base Controls
4.1-10. Steer Only Inoperative
1. Defective Relay (17CR).
2. Loose or broken wire #17C from Relay (17CR). to
Diode (17C).
3. Open Diode (D17C).
4. Open Diode (D17C-1).
1. Check relay. Replace if defective.
2. Check continuity. Replace if defective.
3. Check diode. Replace if defective.
4. Check diode. Replace if defective.
1. Open Diode (D17-1). 1. Check diode. Replace if defective.
4.1-11. Drive Only Inoperative
1. Loose or broken wire #71 from Base Terminal Block
(TB-1) to Drive Override Limit Switch (LS6).
2. Defective Drive Override Switch (LS6).
3. Loose or broken wire #19 from Drive Override Limit
Switch (LS6) to Base Terminal Block (TB-1).
1. Check continuity. Replace if defective.
2. Check switch. Replace if defective.
3. Check continuity. Replace if defective.
4.1-12. No Drive Or Steer When Platform Fully Lowered (All Machines)