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SERVICE KIT INSTRUCTIONS
SERVICE KIT INSTRUCTIONS
SERVICE KIT INSTRUCTIONS
SERVICE KIT INSTRUCTIONS
SERVICE KIT INSTRUCTIONS
Tools Required:
/
"
7
socket or wrench
16
torque wrench, phillips and standard screwdriver
Your safety and the safety of others
is extremely important.
We have provided many important safety mes-
sages in this manual and on your product. Always
read and obey all safety messages.
This is the safety alert symbol. This symbol
alerts you to hazards that can kill or hurt you and
others. The safety alert symbol and the words
"DANGER" and "WARNING" will precede all safety
messages. These words mean:
DANGER
You will be killed or seriously injured if you don't
follow instructions.
WARNING
You can be killed or seriously injured if you don't
follow instructions.
All safety messages will identify the hazard, tell you
how to reduce the chance of injury, and tell you
what can happen if the safety instructions are not
followed.
W A R N I N G
W A R N I N G
W A R N I N G
W A R N I N G
W A R N I N G
Before attempting repair, determine if the pump has been
exposed to/or contains biological, toxic, or radioactive
materials, so that the repair personnel are not exposed to
these items.
SERVICE KIT INSTALLATION
SERVICE KIT INSTALLATION
SERVICE KIT INSTALLATION
SERVICE KIT INSTALLATION
SERVICE KIT INSTALLATION
W A R N I N G
W A R N I N G
W A R N I N G
W A R N I N G
W A R N I N G
Disconnect unit from power source and
vent all air lines to unit to remove
pressure before servicing it. Failure to do
so can result in severe personal injury.
W A R N I N G
W A R N I N G
W A R N I N G
W A R N I N G
W A R N I N G
The head and motor surface(s) can
become very hot. Do not touch these
parts until the pump has been turned off
and allowed to coo
Disassembly:
Disassembly:
Disassembly:
Disassembly:
Disassembly:
Keeping accessories such as, relief
valves, gauges, cross-over tubes, etc., in place at the
ports while you remove the head can reduce system
leaks. Refer to exploded view drawing.
19
/
"
1
allen wrench,
and/or
8
WARNING
PLEASE READ THIS MANUAL COMPLETELY BEFORE INSTALLING AND USING
THIS AIR PUMP. SAVE THIS MANUAL FOR FUTURE REFERENCE AND
KEEP IN THE VICINITY OF THE AIR PUMP.
l.
ISO 9001 & 14001 CeRTIFIeD
Vacuum Pumps & Compressors
NOTE
NOTE:
NOTE
NOTE
NOTE
Gast will not guarantee the performance of
a field rebuilt pump. You can return the pump to a
Gast authorized facility, or perform the rebuild
procedures described below.
1. Loosen all head bolts and remove head. Note
orientation of head and valve plate for later reassembly.
2. Remove head gasket and discard.
3. Remove valve plate assembly and o-ring, and
discard.
4. Remove two retainer screws (may require heat to
break adhesive) and discard. Be careful to avoid
damaging cylinder walls.
5. Remove retainer plate, cup, and cylinder. Discard
old cup.
6. Remove shims under the cylinder. Note: Be sure to
replace all shims, as they are matched to the cylinder
and rod assembly height dimensions.
7. Clean residue from cylinder walls with soft cloth
using a non-petroleum, non-oil based solvent. DO NOT
use kerosene, gasoline, or any flammable substance.
Reassembly:
Reassembly:
Reassembly:
Reassembly:
Reassembly:
Replace shims and cylinder onto the body.
1. Place retainer plate down into the new cup and
push both directly down into the cylinder using even
pressure. Use care when installing cup, as it is
common to pinch cup between retainer and cylinder
wall, this will reduce performance, or can cause unit to
fail. Be sure cup is in the proper position.
2. Install new retainer plate screws, and torque to
36 in.-lbs. You may optionally apply a loctite sealant to
countersunk area of retainer plate.
3. Remove grille and turn fan blade, checking that it
turns freely. Place straight edge across top of cylinder,
rotate rod until retainer plate is at it's highest point,
making sure there is no contact with the straight edge.
Reinstall grille(s).
4. Install new o-ring in groove on top of cylinder.
5. Align valve plate assembly onto cylinder in original
orientation.
6. Place new head gasket onto valve plate assembly.
7. Place head on top of gasket and install head bolts,
use cross pattern to tighten bolts and torque to 80in-lbs.
www.gastmfg.com
70-5325 (Rev. C)
Oilless Roc-R Series
Part No. K756, K757, & K758
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