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Hydraulic 

Service Jack 

w/ Air Motor

Printed in PRC

JS300A-M1 rev 04/08

Read this manual and follow all the Safety Rules and Operating Instructions before using this product.

Model

JS300A

Capacity

3 Ton

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. 

Obey all safety messages that follow this symbol to avoid possible injury or death.

 

!

!

  

AdveRTenCIA

• Leer, comprender, y seguir las instrucciónes antes 

de utilizar el aparato.

• El manual de instrucciónes y la información de 

seguridad deben estar comunicado en lengua del 

operador antes del uso.

• No seguir estas indicaciónes puede causar daños 

personales o materiales.

!

   

WARNING

To avoid 

crushing and related injuries

:

neveR

 work on, under or around a 

load supported only by a hydraulic 

jack.

 

ALWAYS

 use adequately rated 

jack stands.

Operating Instructions & Parts Manual

U.S. Patent No’s. 5,341,723

MAC TOOLS InC.

505 N. Cleveland Ave. Suite 200

Westerville, OH 43082

Summary of Contents for JS300A

Page 1: ... or death advertencia Leer comprender y seguir las instrucciónes antes de utilizar el aparato El manual de instrucciónes y la información de seguridad deben estar comunicado en lengua del operador antes del uso No seguir estas indicaciónes puede causar daños personales o materiales WARNING To avoid crushing and related injuries NEVER work on under or around a load supported only by a hydraulic jac...

Page 2: ...plug SAFETY and GENERAL INFORMATION Save these instructions For your safety read understand and follow the information provided with and on this jack before using The owner and operator of this equipment shall have an understanding of this jack and safe operating procedures before attempting to use The owner and operator shall be aware that use and repair of this product may require special skills...

Page 3: ...e release valve The more you turn the handle counter clockwise the faster the load will come down Maintain control of the rate of speed at which the load lowers at all times 1 Raise load high enough to clear the jack stands 2 Remove jack stands carefully always used in pairs 3 Slowly turn the handle counter clockwise but no more than 1 2 full turn If the load fails to lower a Use another jack to r...

Page 4: ...per or abrasive material on these surfaces Storage When not in use store the jack with saddle fully lowered 1 With saddle fully lowered set jack in its upright level position Remove oil filler plug 2 Fill until oil nearly covers the inner cylinder as seen from the oil filler hole Reinstall the oil filler plug Changing oil For best performance and longest life replace the complete fluid supply at l...

Page 5: ...Figure 2 Replacement Parts Illustration for JS300A Replacement Parts Illustration for JS300A 5 ...

Page 6: ... Ring 2 19 G890 04100 100 Release Valve 1 20 G831 04000 000 Handle Assembly 1 21 G520 90026 K02 Caster Assembly 2 22 G890 90037 K01 04 Front Wheel Assembly 2 23 G83X 90010 K01 Hydraulic Power Unit 1 24 G831 03200 000 25 G831 03400 000 26 G831 00001 000 Cover Plate 1 27 G831 03500 000 Item Description Qty 1 Oil Filler Plug 1 A O Ring 2 B O Ring 1 C Ram Bearing 1 D Back up Washer 1 E U Cup 1 Replace...

Page 7: ...IDENTAL DAMAGE OR LOSS WHATSOEVER 3 ANY IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE SHALL BE LIMITED TO ONE YEAR OTHERWISE THE REPAIR REPLACEMENT OR REFUND AS PROVIDED UNDER THIS EXPRESS LIMITED WARRANTY IS THE EXCLUSIVE REMEDY OF THE CONSUMER AND IS PROVIDED IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED 4 ANY ...

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