SHUTDOWN PROCEDURES
It is your responsibility to follow proper shutdown
procedures to prevent product damage. Store pump
indoors. Do Not expose to wet weather conditions.
NEVER ADD OIL TO THIS OIL-LESS PUMP.
Proper shutdown procedures must be followed to
prevent pump damage. Failure to do so may result in
premature pump failure. Gast Manufacturing Rocking
Piston Oil-Less pumps are constructed of ferrous metals
or aluminum which are subject to rust and corrosion
when pumping condensable vapors such as water.
Follow the to assure correct storage and shutdown
between operating periods.
Check that all external accessories such as relief valves
and gauges are attached to cover and are not damaged
before re-operating product.
3. Check to see that the head gasket on the valve plate
is not compromised in any way, remove from valve
plate, and set aside for reinstallation after cleaning
valve plate.
4. Gently remove valve plate from body of unit
(CAUTION: DO NOT LOSE THE SHIM
WASHERS THAT ARE UNDER EACH
CORNER BOLT HOLE BETWEEN THE VALVE
PLATE AND BODY. THEY MUST GO BACK
BETWEEN THE VALVE PLATE AND BODY
EXACTLY AS THEY CAME OUT). Clean the valve
plate with soap and water and carefully blow off
with compressed air.
5. Reinstall shim washers at each bolt hole on the body
and carefully reinstall valve plate over the pump
body.
6. Reinstall head gasket on the valve plate, place head
over valve plate, install four bolts to hold assembly
to body. Torque each bolt in a cross pattern to
90-100 in. lbs.
It is your responsibility to:
• Regularly inspect and make necessary repairs to
product in order to maintain proper operation.
• Make sure that pressure and vacuum is released
from product before starting maintenance.
Check intake and exhaust filters after first 500 hours of
operation. Clean filters and determine how frequently
filters should be checked during future operation. This
one procedure will help to assure the productʼs
performance and service life.
Solvent Cleaning
Use only Gast recommended Solvent or other
non-petroleum based solvent. Do Not use kerosene
or ANY other combustible solvent to clean product.
1. Remove the four bolts holding the head on.
2. Remove filters and clean with Gast recommended
solvent or other non-petroleum based solvent.
Use compressed air to dry filters and make sure
that all moisture is removed. Reinstall filters in
head, set aside.
1. Disconnect plumbing.
2. Operate product for at least 5 minutes without
plumbing.
3. Run at maximum vacuum for 10-15 minutes.
4. Repeat step 2.
5. Disconnect power supply.
6. Plug open ports to prevent dirt or other
contaminants from entering product.
4
MAINTENANCE
Electrical Shock Hazard
Disconnect electrical power supply cord before
performing maintenance on this product.
If product is hard wired into system, disconnect
electrical power at the circuit breaker or fuse box
before performing maintenance on this product.
Failure to follow these instructions can result in
death, fire or electrical shock.
Injury Hazard
Product surfaces become very hot during operation,
allow product surfaces to cool before handling.
Do not direct air steam at body. Air stream from
product may contain solid or liquid material that can
result in eye or skin damage, wear proper eye
protection.
Clean this product in a well ventilated area.
Failure to follow these instructions can result in
burns, eye injury or other serious injury.
WARNING
Solvent Stream
May contain solid or liquid material
that can result in eye or skin damage.
Wear eye protection when using this product.
Electrical Shock Hazard
Disconnect electrical power supply cord before
installing service kit.
If product is hard wired into system, disconnect
electrical power at the circuit breaker or fuse box
before installing service kit.
Disconnect air supply and vent all air lines to
release pressure or vacuum.
Failure to follow these instructions can result in
death, fire or electrical shock.
SERVICE KIT INSTALLATION
