Service Bulletin

Issued by: GS Document No: 201011040001 

Date: 11/04/2010 

Service Bulletin 

THIS SERVICE BULLETIN APPLIES TO ALL JET BRAND SS-xC AND DS-3C SERIES ELECTRIC 

HOISTS 

Issue: These units experienced sporadic electrical issues, failing contactors, overheating, 

loss of voltage at push button control, limit switches not functioning properly, and 

inconsistent motor operation. These problems were found on our discontinued DS 

series and our current SS series electric hoists. 

Products: ½ TON, 1 TON, 2 TON, 3 TON, 5 TON single and three phase JET SS-xC/DS-3C units. 

Fix: Upgrade kits will be installed on all units. This will involve disassembling each hoist. 

Remove and replace transformer assembly. Replace and install two limit switches. 

Replace capacitor and solid state switch. Replace electrical control assembly. 

Replace power cord and push button cord assembly. (See attachments) 

See page two for upgrade kit stock numbers. 

Contact Technical Service Department to order upgrade kits. 

Units affected: All in stock single and three phase SS-xC series electric hoist. 

Symptoms: Sporadic electrical issues, loss of voltage at the push button control, and inconsistent 

motor operation. 

Action: Complete re-work of all in stock units with testing of each hoist operation. Upgrade kits 

will be provided at no cost. 

Contact: For additional information: 

Contact: Technical Service Walter Meier 

Telephone: 1-888-274-6846 Fax: 1-888-605-2101 

Email: www.waltermeier.com 

427 New Sanford Road | LaVergne, TN 37086 | USA | 615-793-8900 | 615-793-8905 fax | http://www.waltermeier.com

Capacity Phase 

Upgrade Kit Stock 

Ft. of Lift 

Number 

Single Speed, 1Ph Electric Hoists 

1/2 1 10 1/2SS-1C-UG10 

1/2 1 15 1/2SS-1C-UG15 

1/2 1 20 1/2SS-1C-UG20 

1 1 10 1SS-1C-UG10 

1 1 15 1SS-1C-UG15 

1 1 20 1SS-1C-UG20 

2 1 10 1SS-1C-UG10 

2 1 15 1SS-1C-UG15 

2 1 20 1SS-1C-UG20 

3 1 10 1SS-1C-UG10 

3 1 15 1SS-1C-UG15 

3 1 20 1SS-1C-UG20 

5 1 10 1SS-1C-UG10 

5 1 15 1SS-1C-UG15 

5 1 20 1SS-1C-UG20 

Single Speed, 3Ph Electric Hoists 

1/2 3 10 1/2SS-3C-UG10 

1/2 3 15 1/2SS-3C-UG15 

1/2 3 20 1/2SS-3C-UG20 

1 3 10 1SS-3C-UG10 

1 3 15 1SS-3C-UG15 

1 3 20 1SS-3C-UG20 

2 3 10 1SS-3C-UG10 

2 3 15 1SS-3C-UG15 

2 3 20 1SS-3C-UG20 

3 3 10 1SS-3C-UG10 

3 3 15 1SS-3C-UG15 

3 3 20 1SS-3C-UG20 

5 3 10 1SS-3C-UG10 

5 3 15 1SS-3C-UG15 

5 3 20 1SS-3C-UG20 

Dual Speed, 3Ph Electric Hoists 

1/2 3 10 1/2DS-3C-UG10 

1/2 3 20 1/2DS-3C-UG20 

1 3 10 1DS-3C-UG10 

1 3 20 1DS-3C-UG20 

2 3 10 1DS-3C-UG10 

2 3 20 1DS-3C-UG20 

3 3 10 1DS-3C-UG10 

3 3 20 1DS-3C-UG20 

5 3 10 1DS-3C-UG10 

5 3 20 1DS-3C-UG20 

2 

-- Page 2 of 38 ---

Installation process for upgrade kit 

For 1 Phase Electric Hoist (1/2 Ton—5Ton) 

1. Confirm that the electric hoist is disconnected from the power supply. 

2. Unscrew the 8 Phillips pan head machine screws M6×10 (1/2SS-3C-042) from the 

motor side cover (1/2SS-3C-102 or 1SS-3C-102). 

motor side cover (1/2SS-3C-102 

or 1SS-3C-102 ) 

Figure 1 Figure 2 

3. Move the motor side cover (1/2SS-3C-102 or 1SS-3C-102) away from the hoist body. 


or 1SS-3C-102 ) 

Phillips pan head machine screw 

M6×10 (1/2SS-3C-042) 


3 

-- Page 3 of 38 ---

-- Page 4 of 38 --- 

4. Unscrew the 8 Phillips pan head machine screws M6×10 (1/2SS-3C-042) from the gear 

side cover (1/2SS-3C-043 or 1SS-3C-043). 

Figure 5 

5. Move the gear side cover (1/2SS-3C-043 or 1SS-3C-043) away from the hoist body. 

Figure 6 

6. Cut the cable ties that tightened wires on the gear side. 

Figure 7 cable ties 

Figure 8 

4 

Phillips pan head 

machine screws M6×10 

(1/2SS-3C-042) 

gear side cover 

(1/2SS-3C-043 or 

1SS-3C-043) 


(1/2SS-3C-043 

or 1SS-3C-043)

7. Unscrew the screws on the transformer and pull the wires out of the terminals 

on the transformer, including the two grounding wires. 


grounding wire 


8. Disconnect the two bullet quick connectors that connected the brake wires. 


bullet quick 

connectors 

5 

-- Page 5 of 38 ---


transformer bracket (1/2SS-3C-050). Remove the transformer. 

Figure 15 


machine screws M6×10 Figure 16 

(1/2SS-3C-042) 

10. Pull the push-lock terminals with wire out of the two limit switches . 


push-lock 

terminal 

11. Unscrew the 4 Phillips pan head machine screws M3×20 from the two limit switches 

(1/2SS-3C-069); remove the switches. 

push-lock 

Figure 19 terminal 

Figure 20 

6 

limit 

switch 

terminal 

-- Page 6 of 38 ---

12. Cut the cable ties that tightened wires on the motor side. 

Figure 21 

13. According to the wiring diagram on page 14, disconnect the connections between the 

motor wires and the control board. 

Motor wires 

cable ties 

Figure 22 

14. Unscrew the Phillips pan head machine screw M8×16 from the motor side plate 

(1/2SS-3C-016 or 1SS-3C-016). 

Figure 23 

7 

the control 

board 


machine screws 

M8×16 

-- Page 7 of 38 ---

15. Pull the wires through the hoist body and back to the motor side. 

Wires 

were 

pulled 

Figure 24 


motor side plate (1/2SS-3C-016 or 1SS-3C-016 ). 

screws M6×10 (1/2SS-3C-042) 

Figure 25 

17. Remove the control board away from the hoist body. This control board can be 

discarded. 

control board 

Figure 26 

8 

-- Page 8 of 38 ---

18. Unscrew the four screws on the solid state switch and remove the four red wires. 

Figure 27 four red wires Figure 28 

19. Unscrew the two Phillips pan head machine screws M4×35 from the electric 

component board (for 1 phase) and remove the solid state switch. 

the solid state 

two Phillips 

switch 

pan head 

Figure 29 machine 

Figure 30 

screws M4×35 

20. Unscrew the Phillips pan head machine screws M4×6 from the electric component 

board (for 1 phase) and remove the capacitor. 


Figure 31 machine screws 

Figure 32 

M4×6 

9 

capacitor 

holder 

capacitor 

-- Page 9 of 38 ---

22. Put the new transformer assembly on gear case (1/2SS-3C-037 or 1SS-3C-037) beside 

the brake (1/2SS-1C-041 or 1SS-1C-041), then tighten the two Phillips pan head machine 

screws M6×10 (1/2SS-3C-042). 

New transformer 

assembly 

gear 


brake 

23. Install the two new limit switches in position. 

New limit 

switch 

Figure 35 

24. Replace capacitor and solid state switch, which was removed earlier, back into 

position on the new electric control assembly and tighten screws. 

capacitor 

Figure 36 

10 

Solid 

state 

switch 

-- Page 10 of 38 ---

25. Place the new electric control assembly into the correct position by the motor and 

orient it properly. 

Figure 37 

26. According to the new wiring diagram on page 14, reconnect all the wires. Re-attach 

cable ties where needed. 

Figure 38 

11 

New electric 

control assembly 

-- Page 11 of 38 ---

27. Before positioning the new motor side cover, put the new quick connector board 

(with two male quick connectors) through the hole. 

New motor 

side cover 

Hole in the 

motor side 

cover 

Figure 39 

28.Tighten the 8 Phillips pan head machine screws M6×10 (1/2SS-3C-042). 

Figure 40 

29. Place the new quick connector board on the motor side cover. Make sure to orient it 

properly with the 4P male connector on the left. Tighten the 6 Phillips pan head machine 

screws M5×10. 



M5×10 

Figure 41 

12 

New quick connector board 

(with two male quick 

connectors) 



M6×10 

-- Page 12 of 38 ---

-- Page 13 of 38 --- 

30. Place the gear side cover into the right position. Tighten the 8 Phillips pan head 

machine screws M6×10 (1/2SS-3C-042). 

8 Phillips pan head 


M6×10 (1/2SS-3C-042) 

Figure 42 

31. Plug the new power cord assembly correctly into the 4P male connector on the left, 

then plug the push button cord assembly into the other connector. 

New power 

cord 

assembly 

Figure 43 

32. Remove the push button switch from the old control pendant assembly (1/2SS-3C- 

104), and install it to the new push button cord assembly. Then, according to the Figure 

44, connect the wires of the new push button cord assembly. 

Wire No.6 

Wire No.4 

33. The upgrade is complete. 

Figure 44 

13 

gear side 

cover 

New push 

button cord 

assembly 

Push 

button 

switch 

Wire No.5

New Wiring Diagram: Single Phase Only 

14 

-- Page 14 of 38 ---


For 3 Phase 1 Speed Electric Hoist (1/2 Ton—5Ton) 




motor side cover (1/2SS-3C- 

102 or 1SS-3C-102 ) 



motor side cover (1/2SS-3C- 

102 or 1/2SS-3C-102 ) 


M6×10 (1/2SS-3C-042) 


15 

-- Page 15 of 38 ---

-- Page 16 of 38 --- 



Figure 5 

5. Move the gear side cover(1/2SS-3C-043 or 1SS-3C-043) away from the hoist body. 

Figure 6 


Figure 7 

cable ties 

Figure 8 

16 



M6×10(1/2SS-3C-042) 


(1/2SS-3C-043 or 

1SS-3C-043). 


(1/2SS-3C-102 or 

1SS-3C-043).

7. Unscrew the screws on the transformer and pull the wires out of the terminals on the 

transformer, including the two grounding wires. 






bullet quick 

connectors 

17 

-- Page 17 of 38 ---


transformer bracket (1/2SS-3C-050), remove the transformer away. 


Figure 15 machine screws M6×10 Figure 16 

(1/2SS-3C-042) 

11. Pull the push-lock terminals with wire out of the two limit switches. 

push-lock 

Figure 17 

terminal 

Figure 18 

limit 

switch 

terminal 




push-lock 

terminal 

18 

-- Page 18 of 38 ---


cable ties 

Figure 21 



the motor wires 

Figure 22 


(1/2SS-3C-016 or 1SS-3C-016 ). 

Figure 23 

19 

the control 

board 


machine screw 

M8×16 

-- Page 19 of 38 ---


Wires were 

pulled 

Figure 24 


motor side plate (1/2SS-3C-016 or 1SS-3C-016 ). 

Figure 25 

18. Remove the control board away from the hoist body. The control board can be 

discarded. 

the control board 

Figure 26 

20 

screws M6×10(1/2SS-3C-042) 

-- Page 20 of 38 ---

19. Unscrew the nine screws on the reverse phase inspector and pull the nine wires out. 

Reverse 

phase 

inspector 

Figure 27 nine wires 

Figure 28 


board (for 3 phase) and remove the fender. 

the fender 

two Phillips 

pan head 

Figure 29 machine 

Figure 30 

screws M3×6 

21 Remove the reverse phase inspector out of the contactor holder. 

Figure 31 

21 

The reverse 

phase inspector 

The 

contactor 

holder 

-- Page 21 of 38 ---

-- Page 22 of 38 --- 



screws M6×10 (1/2SS-3C-042). 

gear 


assembly 

Figure 32 


New limit 

switch 

Figure 33 

25. Put the reverse phase inspector and the fender, which was removed from the old 

electric component board, back on the contactor holder on the new electric control 

assembly, and tighten the screw M3. Then install the nine wires into the reverse phase 

inspector. 

fender 


22 

brake 

The reverse 

phase 

inspector

26. Install the new electric control assembly by the motor, making sure it is positioned 

correctly. 

the new electric 

control 

assembly 


27. According to the new wiring diagram on page 26, reconnect all wires. Re-attach cable 

ties where needed. 

Figure 38 

28. Before placing the motor side cover into the proper position, put the new quick 

connect board (with two male quick connectors) through the hole. 

the hole in the 

motor side 

cover 

motor side 

cover 

Figure 39 

23 

the new quick 

connect board (with 

two male quick 

connectors) 

-- Page 23 of 38 ---

29. Tighten the 8 Phillips pan head machine screws M6×10 (1/2SS-3C-042). 

Figure 40 

30. Correctly place the new quick connect board on the motor side cover, then tighten 

the 6 Phillips pan head machine screws M5×10. NOTE: The 4P male connector must be 

positioned on the left, as shown. 



M5×10 

Figure 41 



the 8 Phillips pan head 


M6×10 (1/2SS-3C-042) 

Figure 42 

24 



M6×10 

gear side 

cover 

-- Page 24 of 38 ---

32. Plug the power cord assembly correctly into the 4P male connector on the left, then 

plug in the push button cord assembly. 

Figure 43 

33. Install the pushbutton assembly. Remove the push button switch from the old control 

pendant assembly (1/2SS-3C-104), and install it to the new push button cord assembly. 

Then, according to Figure 44, connect the wires of the new push button cord assembly. 

Wire No.6 

Wire No.4 


Figure 44 

25 

Push 

button 

switch 

Wire No.5 

-- Page 25 of 38 ---

New Wiring Diagram: 3-Phase, Single Speed Only 

26 

-- Page 26 of 38 ---


For 3 Phase 2 Speed Electric Hoist (1/2 Ton—5Ton) 





or 1SS-3C-102 ) 




or 1/2SS-3C-102 ) 


M6×10 (1/2SS-3C-042) 


27 

-- Page 27 of 38 ---

-- Page 28 of 38 --- 



Figure 5 

5. Move the gear side cover (1/2SS-3C-043 or 1SS-3C-043) away from the hoist body. 

Figure 6 


Figure 7 cable ties 

Figure 8 

28 



(1/2SS-3C-042) 


(1/2SS-3C-043 or 

1SS-3C-043). 


(1/2SS-3C-102 or 

1SS-3C-043).

-- Page 29 of 38 --- 

7. Unscrew the screws on the transformer and pull the wires out of the terminals on the 

transformer, including the two grounding wires. 





Figure 13 bullet quick connectors 

Figure 14 

29

-- Page 30 of 38 --- 


transformer bracket (1/2SS-3C-050); remove the transformer. 



Figure 15 (1/2SS-3C-042) 

Figure 16 

11. Pull the push-lock terminals with wire out of the two limit switches . 

Figure 17 push-lock 

Figure 18 

terminal 




push-lock terminal 

30 

limit 

switch 

terminal


cable ties 

Figure 21 



the motor wires 

Figure 22 


(1/2SS-3C-016 or 1SS-3C-016). 

Figure 23 

31 

the control 

board 



M8×16 

-- Page 31 of 38 ---


Wires were 

pulled 

Figure 24 


motor side plate (1/2SS-3C-016 or 1SS-3C-016). 

Figure 25 

18. Remove the control board away from the hoist body. The control board can be 

discarded. 

the control board 

Figure 26 

32 

screws M6×10 (1/2SS-3C-042) 

-- Page 32 of 38 ---

19. Unscrew the nine screws on the reverse phase inspector and pull the nine wires out. 

Reverse 

phase 

inspector 

Figure 27 nine wires 

Figure 28 


board (for 3 phase) and remove the fender. 

two Phillips pan head 


the fender 


21 Remove the reverse phase inspector from the contactor holder. 

Figure31 

33 

The reverse 

phase inspector 

The 

contactor 

holder 

-- Page 33 of 38 ---



screws M6×10 (1/2SS-3C-042). 

gear 


assembly 

Figure 32 


New limit 

switch 

Figure 33 

25. Put the reverse phase inspector and the fender, which was removed earlier, back into 

position on the new electric control assembly, and tighten the screw M3. Then install the 

nine wires into the reverse phase inspector. 

fender 


34 

brake 

The reverse 

phase 

inspector 

-- Page 34 of 38 ---

26. Install the new electric control assembly by the motor, making sure it is positioned 

correctly. 


27. According to the new wiring diagram on page 38, reconnect all wires. Reattach cable 

ties where needed. 

Figure 38 

35 

-- Page 35 of 38 --- 

28. Before placing the motor side cover into the right position, put the new quick connect 

board (with two male quick connectors) through the hole. 

the hole in the 

motor side 

cover 

motor side 

cover 

the new electric 

control 

assembly 

Figure 39 

the new quick connect 

board (with two male 

quick connectors)

29. Tighten the 8 Phillips pan head machine screws M6×10 (1/2SS-3C-042). 

Figure 40 

30. Correctly place the new quick connect board on the motor side cover, and tighten the 

6 Phillips pan head machine screws M5×10. NOTE: The 4P male connector must be 

positioned on the left, as shown. 



M5×10 

Figure 41 



the 8 Phillips pan head 


M6×10 (1/2SS-3C-042) 

Figure 42 

36 



M6×10 

gear side 

cover 

-- Page 36 of 38 ---

32. Plug the power cord assembly correctly into the 4P male connect on the left, then 

plug in the push button cord assembly. 

Figure 43 

33. Install the pushbutton assembly. Remove the push button switch from the old control 

pendant assembly (1/2SS-3C-104), and install it to the new push button cord assembly. 

Then, according to Figure 44, connect the wires of the new push button cord assembly. 

Push button 

switch 

Wire No.4 


Figure 44 

37 

Wire No.6 

Wire No.7 

Wire No.5 

-- Page 37 of 38 ---

New Wiring Diagram: 3-Phase, Dual Speed Only 

38 

-- Page 38 of 38 ---

Service Bulletin

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