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JB INDUSTRIES 

 •  PLATINUM DC 8 4 CFM VACUUM PUMP OPERATING MANUAL  •  800 323 0811  •  SALES@JBIND COM  •  JBIND COM           

PART NO 10347-308   0523

                                                                              JB INDUSTRIES

WARRANTY

PLATINUM

®

 DC pumps are warrantied against defects in materials and workmanship for two years OTC—not 

changing oil will void warranty  
JB products are guaranteed when used in accordance with our guidelines and recommendations  Warranty 

is limited to the repair, replacement, or credit at invoice price, (our option) of products which in our opinion 

are defective due to workmanship and/or materials  In no case will we allow charges for labor, expense or 

consequential damage  Repairs performed on items out of warranty will be invoiced on a nominal basis; contact 

wholesaler for details  Product Warranty Registration, Limited Warranty and OTC Warranty are available online at 

www jbind com 

RETURN FOR REPAIR

In the event your pump requires repair, please contact JB Customer Service Department to obtain a  

Return Goods Authorization (RGA) number  Ensure that all returned products are packed to avoid any 

damage in shipment  Paperwork should be placed in a separate plastic bag and should include JB’s 

assigned RGA number, a description of the problem and any customer assigned repair or purchase  

order number, if applicable  

Contact Customer Service for RGA number: 

800 323 0811 Toll-free phone 

800 552 5593 Toll-free fax

Customers in Alaska, Arizona, California, Idaho, Montana, Nevada, Oregon, Utah, and Washington have the option of sending vacuum 

pump repairs to JB or Merced.

JB Industries

 

RGA#_________  

601 N  Farnsworth Ave  

Aurora, IL 60505 

630 851 9444 Tel 

630 851 9448 Fax

Merced AC Equipment Service

 

RGA#_________  

805 S  Fremont 

Alhambra, CA 91803 

626 293 5710 Tel 

626 289 1961 Fax 

TROUBLESHOOTING

SYMPTOM

POSSIBLE CAUSE(S)

CORRECTIVE ACTION

Pump hard to start

A  Power cord not plugged in securely 

B  Motor switch not on 

C  Pump temperature below 30°F 

D  Pump has not been shut down properly 

A  Plug power cord in securely 

B  Turn motor switch to ON position 

C  Warm up pump to 30°F and turn motor switch on 

D  Follow proper start up and shut down procedures  

 

Step 1:

 Remove 1/4" cap 

Step 2: 

Move blank-off valve to OPEN position 

Step 3:

 Turn pump on 

Step 4: 

Run 2 to 3 seconds and close blank-off valve

PROPER START UP AND SHUT DOWN PROCEDURES

:

Step 1: 

Close blank-off valve 

Step 2:

 Open gas ballast valve 

Step 3: 

Run 2 to 3 seconds 

Step 4:

 Shut pump off 

Step 5:

 Close gas ballast valve

Pump won’t pull deep vacuum 

In order for your pump to pull to a near 

perfect vacuum, oil must be clean and 

moisture-free throughout evacuation  

A  Contaminated oil 

B  Oil level too low 

C  Air leak in system being evacuated 

D  Pump inlet fittings missing or not tightened 

E  Coupler slipping 

F  Missing or damaged seals or o-rings

A  Change oil 

B  Add oil 

C  Locate and repair leak(s) 

D  Clean or replace o-ring 

E  Tighten coupler set screws to flats of cartridge and motor 

F  Replace damaged seals or o-rings 

 

Step 1:

    With isolation valve closed, start pump  Oil level should be to the top of the oil level line embossed on the 

front of the pump’s cover  Just a teaspoon low can affect the ultimate vacuum 

Step 2:

   Flush pump and refill with fresh oil  

Step 3:

   Check all connections to pump and system for damaged or missing o-rings  If brass adapters are being used, 

make sure copper gaskets are in place 

Oil drips from point where 

shaft enters the pump housing

Damaged shaft seal

Replace shaft seal

Pump shuts down and will  

not start 

A  Thermal overload may be open 

B   Low Battery (DV-142-FLEX or  

DV-85-FLEX)

A.  Step 1:

 Disconnect pump from system 

Step 2:

 Wait approximately 15 minutes for motor to cool 

Step 3:

 Turn pump on 

Step 4:

 If it cycles off again, return for repair

B.

 Check battery charge; re-charge if necessary

Pump cycles on and off from a 

completely cold start and then 

runs smoothly

A   Oil backed up into cartridge and was being 

cleared out

B  Pump has not been shutdown properly

Step 1:

 Remove 1/4" cap 

Step 2:

 Turn pump on

Motor just hums

If pump has been dropped, the armature in 

motor may be out of alignment with the motor’s 

bell housing

Step 1:

 Set pump on bench with motor standing up

Step 2:

 Loosen the four motor bolts

Step 3:

 Shake motor and re-tighten motor bolts

Step 4:

 Start pump

If this doesn’t work, the pump most likely will need to be sent in for repair 

Motor runs, but no suction

A  Flexible coupler is either broken or loose 

Step 1:

  Set pump on bench with motor standing up

Step 2:

  Look between motor and pump housing from the bottom to see if the flexible part of the coupler is split or broken  

If the coupler is not broken, the coupler may be spinning on either the shaft to motor or cartridge 

Step 3:

  Replace cartridge  Instructions at www jbind com - Support - User Manuals 

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