SOUND LIKE YOUR VACUUM PUMP HAS A ROD KNOCK? THE SOUND IS MOST LIKELY A FAILED DIAPHRAGM WHICH IS THE TOP OF THE VACUUM PUMP.THIS CAN BE EASILY PROVEN BY REMOVING THE PUMP FROM THE TRUCK AND THE FOUR SCREWS THAT ATTACH THE DIAPHRAGM TO THE PUMP BASE.
SQUEEZE THE RUBBER HOSE AT THE BOTTOM OF THE DIAPHRAGM AND PULL IT OFF ITS CONNECTION.
A SMALL BLUE SILICONE VALVE THE SIZE OF A DIME WILL BE FLOATING AROUND INSIDE THAT HAS COME APART AND THAT IS THE NOISE AND CAUSE OF THE FAILURE.IF THE CAM THAT OPERATES THE DIAPHRAGM PUSH ROD THAT IS INSIDE THE LOWER BASE LOOKS GOOD AND THE PULLEY BEARING FEELS TIGHT YOU CAN REPLACE THE DIAPHRAGM RATHER THEN THE ENTIRE PUMP.WE HAVE THE DIAPHRAGM,NEW OEM REPLACEMENT IN STOCK AT ALL TIMES.PLEASE FEEL FREE TO CALL WITH QUESTIONS OR ORDER.YOU CAN NOT ORDER THRU THE WEBSITE,JUST BY PHONE.

PRICE CHANGE COMMING IN THE FALL...TWO YEARS AGO OUR LAST PURCHASE OF 1250 PUMPS WAS AT A COST SUBSTANTIALLY LOWER WHICH WE PASSED ON TO OUR CUSTOMERS.IT WAS RECENTLY BROUGHT TO MY ATTENTION THE PUMPS ARE GOING OBSOLETE SO WE WERE ABLE TO PURCHASE 525 OF THE REMAINING PUMPS FROM THE MANUFACTURER AND HAVE THE PULLEYS MANUFACTURED AGAIN FOR THE PUMPS HOWEVER AT A SUBSTANTIAL INCREASE THEN ALMOST THREE YEARS AGO.WE WILL CONTINUE TO SELL THE REMAINING 41 PUMPS AT THE CURRENT PRICE UNTIL THE INVENTORY IS DEPLETED AND THE FINAL 525 PUMPS COME INTO INVENTORY WITH THE NEW PRICE..

828-644-1900

2003 THRU 2007 DODGE CUMMINS DIESEL JAKE BRAKE VACUUM PUMP, BRAND NEW OEM PART JUST $349.00   9.80 PRIORITY MAIL SHIPPING.
OFTEN WE HAVE SLIGHTLY BLEMISHED NEW PUMPS DISCOUNTED.
ALL OF OUR PUMPS HAVE OUR OWN REDESIGNED PULLEY THAT PROMOTES A LONGER PUMP LIFE

IN STOCK ALL THE TIME,READY TO SHIP WITH PULLEY INSTALLED READY TO INSTALL ON YOUR TRUCK,PREFILLED WITH OIL
.1 YEAR WARRANTY.

TO ORDER WITH YOUR VISA OR MASTERCARD,CALL 828-644-1900

OR CELL# 574-849-0453,THANK YOU !! PETE GOULD

NEED JUST THE TOP DIAPHRAM,SEE THE DIAPHRAM KIT ON PAGE 1 OF THE HOME PAGE, $79.00.00 FREE SHIPPING ALSO IN STOCK !!