Gast 1423 Series Oilless Vacuum Pumps and Compressors - Manual (Page 4)

SERVICE KIT INSTALLATION
SHUTDOWN PROCEDURES
It is your responsibility to follow proper shutdown
procedures to prevent product damage.
NEVER ADD OIL TO THIS OIL-LESS PUMP.
1. Disconnect plumbing.
2. Operate product for at least five 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.
Gast will NOT guarantee field-rebuilt product
performance. For performance guarantee, the
product must be returned to a Gast-authorized
facility.
Service Kit contents vary. Most contain vanes, gaskets
and filter parts.
1. Remove filter/muffler parts from front of muffler box.
2. Remove the 5 muffler box bolts.
3. Use a small hammer to tap on box to remove. Do
not use a screwdriver.
4. Remove the 6 end plate bolts.
5. Remove end plate. Check direction of bevel edges
of vanes then remove vanes.
6. Clean body and rotor slots.
7. Check end plate, rotor and body for scoring.
Severe scoring or worn bearings will require
service at a Gast-authorized facility.
DO NOT remove rotor or motor bolts.
8. Insert vanes, checking that the bevel edges are in
the correct direction.
9. Replace end plate. Torque bolts to 90-120 in. lb.
10. Check gasket for damage.
11. Reinstall muffler box. Torque bolts to 90-120 in. lb.
Check that all external accessories such as relief
valves and gauges are attached and are not damaged
before re-operating 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.
Vent all air lines to release pressure or vacuum.
Failure to follow these instructions can result in
death, fire or electrical shock.
Option 2
1. Remove six end plate bolts. (See exploded view.)
2. Use a small hammer to carefully tap on end plate to
remove. Do not use a screwdriver to pry off.
3. Check that vanes are moving freely in and out of
vane slots. Replace vanes if more than 50% of the
vane extends past the vane slot.
4. Remove vanes and clean both sides with fine emery
cloth. Clean end-plate with fine emery cloth.
5. Flush vanes with Gast recommended solvent and
remove all solvent from vanes.
6. Flush body, rotor and end plate with Gast
recommended solvent, then remove all solvent from
each part.
7. Check body, rotor and end plate for scoring. If
each part is clean and shows no signs of scoring,
re-install parts. If scoring appears, send unit to
factory or replace with new part(s).
Check that all external accessories such as relief
valves and gauges are attached to cover and are
not damaged before re-operating product.
4