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14

Rated 

Capacity 

 0.5t 1t 1.5t 2t  3t  3t  5t  10t  20t 30t 

Running Test Load (kN) 

 

6.3 

12.5 

20 

25 

40 

40 

62.5 

125 

250 

375 

Standard Lift (m) 

 

2.5 

2.5 

2.5 

Effort Required to  

 

210 260 265 272  320 280 358 370  370 370 

Lift Rated Load (N) 

No. of Load Chain Falls 

 

12 

Load Chain Diameter (mm) 

7.1 

10 

7.1 

10  

10  

10  

 

126.5 

143 148 152 181  156 181 181 192  330   

 

136 

156 182 198 266  214 266 365 630  670 

Dimensions 

(mm) 

 266 324 392 407  621 465 636 798  890 1000 

 

 

36 40 52 52  60 60 68 85 106 

106 

 

25.5 28 38 38  42 42 50 57  84 84 

Net Weight (kg) 

 

10.5 

17 

18 

42 

21 

42 

72.6  

162  

228

Extra Weight per metre of extra lift 

1.5 

1.8 2.1 2.3  3  3.1 4.6 9.8 19.6 28.3

GT Viper Chain Blocks

Specifications & Dimensions

HOISTS

A5 Viper Chain Block Manual V2.indd   14

04/03/2014   07:33

Summary of Contents for Viper 0.5t

Page 1: ...g Instructions Safety Manual Chain Block Manual Rated Capacities 0 5 through to 30 tonnes HOISTS www gtlifting co uk Head Office Units 13 14 Brickyard Road Aldridge West Midlands WS9 8SR UK T 44 0 1922 457916 F 44 0 1922 743664 E office gtlifting co uk A5 Viper Chain Block Manual V2 indd 1 04 03 2014 07 33 ...

Page 2: ...ly hazardous situation that if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices Every year many accidents occur which could have been avoided by a few seconds of thought and a more careful approach to handling equipment You the operator can avoid many accidents by observing the following precautions in this manual To avoid personal injury stu...

Page 3: ...e defined as the process of lifting and moving heavy loads using hoists and other mechanical equipment Skill acquired through specialised experience and study is essential to safe rigging operations Unpacking After opening the carton the Chain Block should be carefully inspected for damage which may have occurred during shipment or handling Check the Chain Block frame for dents or cracks and inspe...

Page 4: ...ied into the Chain Block mechanism Check brake for evidence of slippage under load Each GT Viper Chain Block is built in accordance with the specifications contained herein and at time of manufacture was tested to our interpretation of applicable sections of the European standard BS EN 13157 Consult your local GT branch for any usage of GT Viper Chain Blocks that does not involve working in a dire...

Page 5: ... NOT lift more than rated load 18 DO NOT use damaged Chain Block or Chain Block that is not working correctly 19 DO NOT use the Chain Block with twisted kinked damaged or worn chain 20 DO NOT lift a load unless chain is properly seated in chain wheel s 21 DO NOT use load chain as a sling or wrap chain around load 22 DO NOT lift a load if any binding prevents equal loading on all supporting chains ...

Page 6: ...Chain Block DO NOT heat treat and DO NOT weld any part of the Chain Block especially the load chain DO NOT attempt to lift load beyond the rated capacity DO NOT hold the load chain in a loaded state while operating the Chain Block as serious injury may occur if the brake did not operate properly Important Safety Warnings HOISTS A5 Viper Chain Block Manual V2 indd 6 04 03 2014 07 33 ...

Page 7: ... into the frame of the block DO NOT shock load Chain Block chain or hook DO NOT operate the Chain Block unless it is rigged to pull in a straight line from hook to hook and the frame is allowed to freely swivel on the upper hook Important Safety Warnings HOISTS A5 Viper Chain Block Manual V2 indd 7 04 03 2014 07 33 ...

Page 8: ...immediate failure of some load carrying parts or result in damage causing failure at less than the rated capacity Exceeding the rated capacity of the Chain Block may cause load to fall To Avoid Injury Do not exceed the hand chain pulls specified in safety procedure 4 5 Do not wrap load chain around the load or bring the load in contact with the Chain Block Doing this will result in the loss of the...

Page 9: ... unit to perform the periodic inspections The periodic inspections are to include those items listed under frequent inspections as well as the following a Chain for excessive wear or stretch b Worn cracked or distorted parts such as hook blocks chain guide stripper loose end pin shafts gears hook collar and bearings c Inspect for wear on the tip of the pawl teeth of the ratchet and pockets of the ...

Page 10: ...e returning chain to service or after replacing a load chain lubricate liberally with chain oil or equal lubricant Remove excess lubricant from the chain by wiping with a cloth Hand Chain Hand Chain should be cleaned inspected and gauged in the same manner as load chain As received from the factory the hand chain may contain an unwelded link This link can be placed in a vice and twisted open to fa...

Page 11: ...s have a durable scratch resistant finish Normally the exterior surfaces can be cleaned by wiping with a cloth Preventative Maintenance In addition to the periodic inspection procedure a preventative maintenance program should be established to prolong the useful life of the Chain Block and maintain its dependability and continued safe use The program should include the periodic inspections with p...

Page 12: ...olts and nuts visual All fasteners should be tight Safety catch visual Should close properly Chain visual Should be properly lubricated and free from bends nicks or stretch rust and dust Chain guide rollers visual Should rotate freely and keep chain in the pockets of the chain wheel s Functions Lifting and Lowering Lift and lower Hoist should operate smoothly and easily a light load Pawl should cl...

Page 13: ...d capacity only Return to supplier for repair and testing Return to supplier for repair and testing Load is not being pulled in a vertical direction Pull is at an angle greater than 60 Swivel Hook has ceased operating Block is dirty or hampered with foreign matter Fall of chain is tangled Block is overloaded Brake mechanism has jammed Wear and tear Poor maintenance and inspection Poor storage and ...

Page 14: ...n Diameter mm 5 6 7 1 8 10 7 1 9 10 10 10 A 126 5 143 148 152 181 156 181 181 192 330 B 136 156 182 198 266 214 266 365 630 670 Dimensions mm C 266 324 392 407 621 465 636 798 890 1000 D 36 40 52 52 60 60 68 85 106 106 K 25 5 28 38 38 42 42 50 57 84 84 Net Weight kg 7 10 5 17 18 42 21 42 72 6 162 228 Extra Weight per metre of extra lift1 5 1 8 2 1 2 3 3 3 1 4 6 9 8 19 6 28 3 GT Viper Chain Blocks ...

Page 15: ...15 Spare Parts Diagram HOISTS A5 Viper Chain Block Manual V2 indd 15 04 03 2014 07 33 ...

Page 16: ...5t 36 Top Hook Assembly 10t 37 Top Hook Assembly 20t Fig No Description 1 Lock Nut 2 Name Plate 3 Retainer 4 Bearing for Splined Gear 5 Gear Cover 6 2nd Gear 7 3rd Gear 8 1st Gear 9 Load Sprocket 10 Pinion Shaft 11 Gear Side Plate 12 Support Pin 13 End Anchor 14 Chain Guide 15 Chain Stripper 16 Chain Stripper Pin 17 Hand Chain Side Plate 18 Hook Pin 19 Top Hook Assembly 20 Pawl Pin 21 Pawl Spring ...

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