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Oil Maintenance
Air Filter Maintenance
Bulldog
Replace the Main Filter
1. Turn the vacuum off.
2. While wearing gloves, without removing any bolts or
nuts, lift the vacuum controller off the vacuum pump.
3. Slide the main air filter to the access hole; lift out of
the filtrols and discard.
4. Replace the main air filter.
5. Turn the vacuum back on.
Replace the Vacuum Controller Filter
1. Remove the retaining nut off the top of the filter.
2. Remove the vacuum controller filter by lifting the filter
over the teepee.
3. Inspect spud gasket for cracks.
4. Discard the filter and replace with new.
5. Turn the vacuum back on.
Bulldog Air Filter Sets:
�
003583 - Two (2) Air Filters
�
003740 - Two (2) Air Filters & Oil Filter Element
Bison
Replace the Main Filter
1. Turn the vacuum off.
2. While wearing gloves, without removing any bolts or
nuts, lift the vacuum controller off the vacuum pump.
3. Lift the main air filter out of the filtrols and discard.
4. Replace the main air filter.
5. Turn the vacuum back on.
Replace the Vacuum Controller Filter
1. Remove the retaining nut off the top of the filter.
2. Remove the vacuum controller filter by lifting the filter
over the teepee.
3. Inspect spud gasket for cracks.
4. Discard the filter and replace with new.
5. Turn the vacuum back on.
Bison Air Filter Sets:
�
003700 - Two (2) Air Filters
�
003750 - Two (2) Air Filters & Oil Filter Element
Check V-Belt Tension
1. Access the belt.
a
. Bulldog - Remove two-piece belt guard
.
b. Bison - Remove belt guard.
2. Measure the belt tension by using a tension gauge
or the finger pressure test.
a. Bulldog Models:
1. 855.xxx.x- 70 lbs. using tension gauge or 3/16"
deflection with 4 lbs. of finger pressure.
2. 809.xxx.x and 809E.xxx.x- 50 lbs. using tension
gauge or 1/4" deflection with 4 lbs. of finger
pressure.
b. Bison Models:
All Bison models: 70 lbs. using tension gauge or
1/4" deflection with 4 lbs. of finger pressure.
3
. If belt tension is changed, make sure the pulley
alignment is checked. Follow instructions in the
“Belt Replacement, Alignment and Tensioning”
service procedure, which is on the web at
www.dentalez.com/downloads/service-procedures
,
or call RAMVAC
Technical Support at
866-DTE-INFO.
4
. Return the vacuum pump to service.
Check Oil Drip Rate
1. Start the vacuum and run for at least 10 minutes.
2. Look through the sight glass on the bottom of the
drippers and look for the drips of oil.
3. Count the drips of oil through each sight glass per
minute.
4. Drip rate at each dripper should be 1 to 3 drops per
minute when the vacuum unit is thoroughly warmed up.
The vacuum setting is 7" to 7.5" Hg, and the ambient
temperature is 70 °F to 75 °F.
NOTE:
The drip rate will vary slightly depending on the
ambient temperature and oil temperature.
Change Oil
1. Operate the vacuum pump until the oil reservoir is warm
to touch.
2. Turn the vacuum pump off.
3. Insert a container large enough to hold the used oil under
the oil drain tube.
4. Carefully open the oil reservoir drain valve and drain the
oil.
NOTE:
If any water drains from the oil reservoir when the
valve is opened, call RAMVAC at 866-DTE-INFO.
5. Unscrew the oil filter canister and remove the filter.
a. If filter is clean, reinstall the filter back into the
canister.
b. If filter is dirty, replace filter.
6. Install the oil filter canister.
7. Close the drain valve and add the recommended amount
of oil. (See
User Manual
for recommended amount).
8. Check the drip rate.
9. Return the vacuum pump to service.
Mobil 1
TM
15W50 Oil:
�
380706 - Six 1-quart bottles of oil
RAMVAC Vacuum Pump Maintenance Instructions
2500 Highway 31 South, Bay Minette, AL 36507
Phone: 866-DTE-INFO Fax: 251-937-0461
www.dentalez.com
© 2019 DentalEZ, Inc. All rights reserved.
DentalEZ is a registered trademark of DentalEZ, Inc. Bison,
Bulldog & RAMVAC are registered trademarks of RAMVAC
Dental Products, Inc.
A Brand of
®
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