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13. Attach the bottom block on single-chained hoists using a

new load block screw (See Figure 23). On double-chained
hoists, feed the chain through the load block (welds 
of the upstanding links will be in towards the sheave) and
fasten the end of the chain to the chain support using a
new chain support pin (See  Figure 23). Be sure there are
no twists in the chain.

14. Adjust the upper limit switch (See ADJUSTING UPPER

LIMIT, page 8).

Chain Replacement with No Chain in Hoist

Refer to Figure 4.
1. DISCONNECT HOIST FROM POWER SUPPLY and move

hoist to a work table. Remove the electrical cover, electrical
panel and the electric brake assembly.

2. Detach the chain stripper from the bottom of the hoist.

3. Insert the new chain between the load sheave and the chain

guide. Feed the chain into the hoist by manually turning the
brake hub. Allow about 15" of chain below the hoist on the
slack end. Be sure the welds of the upstanding links are out
away from the load sheave and that proper orientation is
observed for attachment of the slack end. Also be sure the
load hook assembly (if already attached to the chain) is
toward the center of the hoist or to your right looking from
the transmission end.

4. Reinstall the chain stripper (with the chain anchor on double-

chained hoists, See Figure 4) observing proper chain
alignment and avoiding any twist in the chain.

5. Follow steps 11 through 14 in previous section, CHAIN

REPLACEMENT WITH CHAIN IN HOIST, to complete the
chain replacement procedure.

NOTE: Inspect chain guides and load sheave for wear,
replace as needed.

LIMIT SWITCH ADJUSTMENT

IMPORTANT: Before placing hoist in operation, check the limit
switch adjustment. Limit switches are provided to protect the
hoist against damage resulting from overtravel or to allow setting
the hook travel within the factory-set limits of travel. The standard
limit switch is designed for lifts of 50 ft or less on single-chained
hoists and 25 ft or less on the 2 ton, double-chained models. The
long lift limit switch allows for the maximum amount of lift, which
is 134 ft on 1/2 ton and under models, 143 ft on the 1 ton
models, and 71 ft on the 2 ton models.

The upper and lower limit switch adjusting nuts are color-coded
gold and silver respectively. Each limit nut has 10 slots for fine
adjustment, and the increment of adjustment is such that one
slot is equivalent to approximately one link of chain travel with
the standard limit switch. Movement of the limit switch nuts
toward or away from each other increases or decreases the
hook travel respectively.

Adjusting Upper Limit (Gold Nut)

Refer to Figure 3.
1. Suspend the hoist. For single chain models raise the load

block until there is a minimum clearance of 2" from the hoist
housing and the top of the block. Double chain models 
require a minimum clearance of 1" from the chain support to
the top of the load block.

2. DISCONNECT HOIST FROM POWER SUPPLY and

remove the electrical cover.

3. With a screwdriver, pry the spring guide plate out of the slots

in the limit switch nuts.

4. Turn the slotted gold nut toward its limit switch until the

switch “clicks” then turn two slots farther. Release the spring
guide plate and be sure it slips back into the slots in both
limit switch nuts. Do not disturb the silver slotted nut if it has
been set previously.

Adjusting Lower Limit (Silver Nut)

Refer to Figure 3.
1. Suspend the hoist. Carefully lower the load block to a point

where the slack-end loop of the chain hangs down 6" or
more from the hoist housing (or the limit desired in any
particular application allowing the minimum 6"). There
should be a minimum clearance of 1½" between the chain
stop and bottom of hoist.

2. DISCONNECT HOIST FROM POWER SUPPLY and

remove the electrical cover.

3. With a screwdriver, pry the spring guide plate out of the slots

in the limit switch nuts.

4. Turn the slotted silver nut toward its limit switch until the

switch “clicks,” then turn two slots farther. Release the spring
guide plate and be sure it slips back in the slots in both limit
switch nuts. Do not disturb the gold slotted nut if it has been
set previously.

8

Country Club Road
P.O. Box 779
Wadesboro, NC 28170 USA
TEL: (800) 477-5003
FAX: (800) 374-6853

There are wires running through the hoist. Carefully
ease the hoist sections apart. Do not jerk them apart.

Double-Chain

Only

Figure 4 — Chain Replacement 

Diagram

If the wires running to the limit switches are ever
disconnected for any purpose, be sure to replace
wires in accordance with the correct wiring diagram
(See Figures 9A, 9B, 9C & 9D).

For more information contact: Sievert Crane and Hoist, (708) 771-1600, [email protected], www.sievertcrane.com

Summary of Contents for JLC Series

Page 1: ...to operate the equipment as directed in the manual may cause injury Should you have any questions regarding this product please call Coffing Hoists at 800 477 5003 Made in the U S A Before using the h...

Page 2: ...unless specific precautions have been taken 19 NOT allow the load chain or hook to be used as an electrical or welding ground 20 NOT allow the load chain or hook to be touched by a live welding elect...

Page 3: ...to ensure that the voltage at the reversing contactor does not drop below 10 of the nominal voltage while lifting a load Low voltage will result in higher amp draw damage to the hoist and potential fi...

Page 4: ...benches invite accidents 9 The operator should not engage in any practice which will divert his attention while operating the hoist 10 Before using the hoist the operator should be certain that all pe...

Page 5: ...according to LIMIT SWITCH ADJUSTMENT page 8 CHAIN CONTAINER Optional Accessary Refer to Table 4 For installations where the slack chain hanging from the hoist may be objectionable or hazardous the us...

Page 6: ...hile the hoist is being operated If the load being lifted exceeds the lifting capability of the overload clutch the hoist motor will continue to run causing overheating of both the clutch and hoist mo...

Page 7: ...UPPLY and remove the electrical cover 3 Using a screwdriver pry the spring guide plate out of the slots in the limit switch nuts See Figure 3 Turn the gold nut back to about the center of the threaded...

Page 8: ...nd silver respectively Each limit nut has 10 slots for fine adjustment and the increment of adjustment is such that one slot is equivalent to approximately one link of chain travel with the standard l...

Page 9: ...ntacts If replacement is necessary see Figures 16 17 18 and 19 for replacement parts WIRING Refer to Figures 9A 9B 9C 9D Single phase units 115 230V are shipped wired for 115V and the 1 speed 230 460V...

Page 10: ...e as shown in Figure 6 3 Remove the transformer bolted to the back of the panel plate if it requires replacement 4 Refer to Figure 15 to disassemble the brake See BRAKE ADJUSTMENT on page 9 to properl...

Page 11: ...remove it to workbench 2 Remove the lug retaining screw 3 Remove the lug retainer 4 Remove the lug Care must be taken during reassembly to have the hook in proper orientation Refer to figures 8A 8B f...

Page 12: ...Check for burned contacts Replace as needed 4 Loose screw clamps 4 Ensure that screw clamps are tightened on the terminal blocks and reversing contactor Hook raises but will not lower 1 Hoist overload...

Page 13: ...hat the voltage at the reversing contactor is within 10 of the nominal voltage while lifting a load Motor brake noise or chatter while starting hoist 1 Hoist overloaded 1 Reduce load to within rated c...

Page 14: ...or 1 Speed 230 460V 3 Phase Models Figure 9C Wiring Diagram for 1 Speed 208V 380V 575V 3 Phase Models Factory supplied diagrams will be numbered beginning with 985 for 575V 987 for 208V and 988 for 38...

Page 15: ...3 Figure 9D Wiring Diagram for 2 Speed 3 Phase Models Factory supplied diagrams will be numbered beginning with 983 for 230 or 460V 985 for 575V 987 for 208V and 988 for 380V For more information cont...

Page 16: ...ssive wear Build up of foreign substances Housings Load Block Cracks distortion Excessive wear internal build up of foreign substances Wiring and Terminals Fraying defective insulation Hoist Reversing...

Page 17: ...dule RECOMMENDED LUBRICATION SCHEDULE COFFING ELECTRIC POWERED CHAIN HOIST PAGE AND COMPONENT TYPE OF LUBRICANT TYPE OF SERVICE AND REFERENCE NO FREQUENCY OF LUBRICATION HEAVY NORMAL INFREQUENT Pages...

Page 18: ...JLC675K 20 1 15 JLC Strip Decal JLC677 1 Left Right Side Nylon Cover 1 8 ton 08770W 1 1 4 ton 08771W 1 1 2 ton 08772W 1 1 ton 08773W 1 2 ton 08774W 1 Chain Container 08348W 1 JLCET Trolley Lug Mounte...

Page 19: ...kwasher H4082P 4 Ref Description Part Qty Ref Description Part Qty No No No No Not available as an individual part Contact your nearest Coffing Service Center for parts and service For a complete list...

Page 20: ...60Hz 873JX12 1 1 4 hp 208V 3Ph 60Hz 873JX13 1 1 2 hp 208V 3Ph 60Hz 873JX14 1 1 hp 208V 3Ph 60Hz 873JX16 1 2 Stator Assembly 1 3 Rotor Assembly 1 4 End Shield 35EP3100D15 1 5 Rear Bearing 500K3 1 6 Fro...

Page 21: ...JL6 1 415V 853JL7 1 10 Locknut H3978 3 11 Adapter JL142 1 12 Screw H2976P 3 13 Retaining Ring H5501 2 14 Shading Coil 860J1 2 Shading Coil Adhesive H7812 1 15 Lockwasher H4134 3 16 Spacer for 1 4 1 2...

Page 22: ...hase 4 cond 953JM1 1 11 PB Cable Assembly See Figures 18 19 1 12 Panel Standoff Spacer 200J4 3 13 1 4 Internal tooth Lockwasher H4134 3 14 1 4 20UNC X 4 Screw H1027P 3 15 8 32UNC X 5 16 Screw H2751 2...

Page 23: ...1 6 15 ft Power Cord Assembly 953JM1 1 7 PB Cable Assembly 1 See Figures 18 19 8 Panel Standoff 200J4 3 9 1 4 Internal tooth Lockwasher H4134 3 10 1 4 20UNC X 4 Screw H1027P 3 11 8 32UNC X 5 16 Screw...

Page 24: ...e For a complete list see pages 34 and 35 Please have the hoist model number serial number and part number with description available for reference 12 6 7 10 11 4 5 13 14 15 4 8 4 9 16 3 2 1 For more...

Page 25: ...t Assembly Includes items 6 7 36987 1 7 Button Assembly 36988 1 8 Grommet 36989 1 Hardware Kit 36939 1 Includes items 9 16 Warning Tag 687K3W 1 Parts List for 1 Speed Pushbutton Station Ref Descriptio...

Page 26: ...e For a complete list see pages 34 and 35 Please have the hoist model number serial number and part number with description available for reference 12 6 7 10 11 4 5 13 14 15 4 8 4 9 16 3 2 1 For more...

Page 27: ...t Assembly Includes items 6 7 36868 1 7 Button Assembly 36869 1 8 Grommet 36866 1 Hardware Kit 36939 1 Includes items 9 16 Warning Tag 687K3W 1 Parts List for 2 Speed Pushbutton Station Ref Descriptio...

Page 28: ...1 12 Retaining Ring H5520 1 13 Insulator JF754 1 14 Spring JF343 3 1 15 10 24UNC X 1 2 Screw H2970 2 Contact your nearest Coffing Service Center for parts and service For a complete list see pages 34...

Page 29: ...de Assembly 258JG7 1 18 End Plate 258J8 1 19 8 32UNC X 3 8 Screw H2741P 2 20 Drive Pinion 427J1 1 21 Retaining Ring H5520 1 22 10 24UNC X 3 8 Screw H2981P 2 Ref Description Part Qty Ref Description Pa...

Page 30: ...21 24 22 21 23 26 29 5 15 11 31 16 13 11 14 14 16 17 6 24 33 25 27 28 12 32 30 34 34 NOTE Orient output gear 32 with long boss towards gear housing 2 on 1 2 ton under models and towards transmission...

Page 31: ...Overload Clutch Assembly 1 8 ton 32 fpm 591JG22 1 1 4 ton 16 fpm 591JG25 1 1 4 ton 32 fpm 591JG22 1 1 2 ton 16 fpm 591JG16 1 1 2 ton 32 fpm 591JG21 1 1 2 ton 591JG17 1 24 Retaining Ring H5503 2 25 Be...

Page 32: ...have the hoist model number serial number and part number with description available for reference 2 Ton Models 1 Ton Under Models 1 4 5 3 2 6 9 18 8 19 15 14 26 24 15 28 32 12 29 7 25 31 16 14 30 23...

Page 33: ...22 3 8 24 Hex Locknut H3964P 2 23 Load Block Screw H2403P 2 24 Load Block Frame JF30 1 2 25 Sheave Shaft Assembly JF917 1 1 26 Sheave Shaft JF122 1 1 27 Sheave Bearing Assembly JF916 1 28 Roll Pin H5...

Page 34: ...st Otter Creek Rd Mabelville AR 72103 501 455 5898 Fax 501 455 6179 ARIZONA MECHANICS TOOL SERVICE 1301 E Apache Park Place Tuscon AZ 85714 520 889 8484 AZ only 800 372 6700 Fax 520 889 6668 CALIFORNI...

Page 35: ...5891 Fax 215 784 0343 RHODE ISLAND MOTORS HOIST CONTROLS INC 179 Railroad Street Woonsocket RI 02895 401 767 4568 Fax 401 767 4567 SOUTH CAROLINA ENGINEERED SYSTEMS INC 1121 Duncan Reidville Road Dun...

Page 36: ...ed by normal wear abuse improper or inadequate power supply improper or inadequate maintenance eccentric or side loading overloading chemical or abrasive actions excessive heat unauthorized modificati...

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