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Safety Precautions

Operating Instructions

 

CAUTION: To prevent personal injury and damage to equipment,

  Study, understand, and follow all warnings and instructions. If the operator cannot read this 

document, operating instructions and safety precautions must be read and discussed in 

the operator’s native language.

  Before using the service jack to lift a vehicle, refer to the vehicle service manual to determine 

recommended lifting surfaces on the vehicle chassis.

  Wear eye protection that meets ANSI Z87.1 and OSHA standards.

  Inspect the jack before each use; do not use the jack if it’s damaged, altered, or in poor 

condition. Take corrective action if any of the following conditions are found: cracked or 

damaged housing; excessive wear, bending, or other damage; leaking hydraulic fluid; scored 

or damaged piston rod; loose hardware; modified or altered equipment.

  A load must never exceed the rated lifting capacity of the jack.

  Use the jack on a hard, level surface. The jack must be free to roll without obstruction while 

lifting or lowering the vehicle. The wheels of the vehicle must be in the straight-ahead position, 

and the hand brake released.

  Use the jack for lifting purposes only. Stay clear of a lifted load. Place support stands under 

the axles before working on the vehicle. Do not move or dolly the vehicle while on the jack.

  Center the load on the jack saddle. Off-center loads can damage seals and cause jack failure. 

Lift only dead weight.

  Do not use blocks or other extenders between the saddle and the load being lifted.

  Do not modify the jack or use adapters unless approved or supplied by Jackco.

  Lower the jack slowly and carefully while watching the position of the jack saddle.

  Use only automatic transmission fluid. The use of alcohol, hydraulic brake fluid, or transmission oil could 

damage seals and result in jack failure.

This guide cannot cover every situation, so always do the job with safety first.

Setup

1.  Loosen the screw on the front of the handle socket.
2.  Grease the socket opening. Insert the handle.
3.  Torque the screw to 120 in. lbs.

Operation

1.  Close the release valve by turning the handle clockwise (CW) as far as it will go.
2.  Position the jack under the vehicle.  CAUTION: Use the manufacturer’s recommended lifting points on the chassis.
3.  Pump the jack handle to raise the saddle to the contact point.
3.  Check the placement of the jack; the load must be centered on the jack saddle.   CAUTION : Avoid wheel obstructions 

such as gravel, tools, or uneven expansion joints.  

4.  Finish lifting the vehicle by pumping the handle. Do not attempt to raise the jack beyond its travel stops.
5.  Place approved support stands under the vehicle at points that will provide stable support. Before making repairs on 

the vehicle, lower it onto the support stands by slowly and carefully turning the handle counterclockwise (CCW).

Summary of Contents for 66310

Page 1: ...17 30 18 26 7 Refer to sheet 3 for hydraulic assembly detail Visit our website at http www jackco com Email our technical support at techsupport jackco com WARNING Read this material before using this...

Page 2: ...turn Spring 18 2 Tie Rod 19 1 Handle Yoke Bottom Half 20 1 Handle Yoke Connection Pin 21 1 Handle Yoke Top Half 22 1 Hydraulic Assembly 23 1 Spring 24 1 Handle Yoke Lock 25 1 Rivet 26 5 Washer 8 27 1...

Page 3: ...ivot Support Rod Screw 16 1 Cover Plate 17 1 Return Spring 18 2 Tie Rod 26 5 Washer 8 34 4 Nut 16 35 4 Washer 16 36 4 Screw M5 x 12 40 4 Screw M8 x 20 No 66310 10 Handle Pivot Kit contains Item No Qty...

Page 4: ...Hydraulic Assembly 43 45 46 49 50 52 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 61 60 64 65 61 60 64 2x...

Page 5: ...1 x 1 8 61 3 Relief Valve Cover Screw 62 1 Steel Ball 8 mm 63 1 Low Relief Valve Set Screw 64 4 Steel Ball 5 mm 65 2 Piston Housing Copper Seal Ring 66 1 High Pressure Piston Housing 67 1 O Ring 68 1...

Page 6: ...ng 67 1 O Ring 68 1 Circlip 15 x 11 x 3 69 1 High Pressure Piston 70 1 High Pressure Piston Return Spring 71 1 High Pressure Piston Dust Cover 72 1 Return Spring Holder 15 73 1 Circlip 15 76 1 Low Pre...

Page 7: ...on the jack Center the load on the jack saddle Off center loads can damage seals and cause jack failure Lift only dead weight Do not use blocks or other extenders between the saddle and the load being...

Page 8: ...ective 6 Replace packing Jack lifts only partially 1 Too much or not enough oil 1 Check oil level Jack advances slowly 1 Pump not working correctly 1 Rework pump 2 Leaking seals 2 Replace seals Seal k...

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