Just Better Keeping the life of your pump - Manual (Page 8)

OPEN
POSITION
PAUSE
POSITION
CLOSED
POSITION
Sight Glass Repair
Step 1: With cover off of the pump,
lay on two blocks of wood. Pop out
the sight glass using a broom handle or
other objects as a punch. For DV-85
series, DV-142 series, or DV-200 series
use a 1” diameter punch.
Step 2: Clean the surface with acetone
or nail polish remover. Put loctite on the
inside surface of the hole.
Step 3: Install the new sight glass from
the outside. The hole position does not
matter with the new style sight glass.
Step 4: With the wood block covering
the sight glass, tap the sight glass into
place. Replace the cover on the pump.
OIL LEVEL
NEW STYLE
SIGHT G LASS
Troubleshooting: Pump Hard to Start
Possible cause: Pump has not been shut down properly.
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.
READ THE INSTRUCTION MANUAL FOR 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.
NOTE: See previously discussed topic “Breaking Vacuum”
Possible cause: Check oil level
Possible cause: Missing or damages seals or o-rings
In order for your pump to pull to a near perfect vacuum, oil must be clean and
moisture-free throughout evacuation.
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 refi ll with fresh oil. See Cleaning and Testing Pump
Section for review.
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.
Replacing Coupler (Motor Removed)
Bottom
Of Flat
1/8"
Incorrect Correct
Coat setscrew threads with removable thread sealant. Align coupler setscrew
with fl at surface of cartridge shaft. Tighten screw so coupler slides on to shaft
but stops at the bottom of the fl at. Tighten until screw head is fl ush with coupler
surface (approx. 40 in. lbs.).
Possible Cause: 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 (Figure 3 of this booklet)
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.
Troubleshooting: Motor Just Hums
Troubleshooting: Motor Runs but No Suction
Possible Cause: Flexible coupler is either broken or loose.
Step 1: Set pump on bench with motor standing up (Figure 3 of this booklet)
Step 2: Look between motor and pump housing from the bottom to see if the
fl exible part of the coupler is split or broken. If it is broken, see “Flexible Cou-
pler” section of this booklet. If the coupler is not broken, the coupler may be
spinning on either the shaft to motor or cartridge.
Step 3: Go to www.jbind.com and on the tool bar go to Technical. Select
instruction sheets from the drop down menu and go to cartridge replacement in-
structions. These instructions are good for replacing: fl exible couplers, motors,
shaft seals, and cartridges.
Troubleshooting: Poor Pull Down
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