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REF

DESCRIPTION       

QTY

74R1   

75R1

1 CAP SCREWS

2

BB570

BB570

2

CAP SCREWS

2

BB516C    BB516C

3

HEAD

1

AP200E

AP200E

HEAD O-RING

1

AP109

AP109

5

VALVE LIMITER

1

AP110

AP110

LEAF VALVES

2

AF817

AF817

7

VALVE PLATE

1

AP101A

AP101A

8

VALVE RETAINER

1

AF819A

AF819A

9

VALVE SCREW

1

BB330A

BB330A

10 

CYLINDER O-RING

1

AT276

AT276

11

CYLINDER

1

AP119

AT275

12 

RETAINER SCREWS

2

AT283

AT283

13

RETAINER PLATE

1

AT715

AT566A

14 

PISTON CUP

1

AT329

AT280

15

FAN

1

AP108A

AP108A

16

GRILLE SHROUD

1

AP107A

AP107A

17

VALVE PLATE ASSEMBLY

1

AP102A

AP102A

18

FILTER

1

B300A

B300A

***

SERVICE KIT

1

K806

K806

EXPLODED PRODUCT VIEW, PARTS & ORDERING INFORMATION

* 74R shown.
*** Item not shown.

Denotes parts included in the Service Kit.

Parts listed are for stock models.  For specific OEM models, please consult the factory.  
When corresponding or ordering parts, please give complete model and serial numbers.

Summary of Contents for 74R

Page 1: ...must be filtered out Consult your Gast Distributor Representative before using at high altitudes This pump is oil less and requires NO lubrication IMPORTANT PLEASE READ THIS MANUAL AND SAVE FOR FUTURE REFERENCE Thank you for purchasing this Gast product It is manufactured to the highest standards using quality materials Please follow all recommended maintenance operational and safety instructions ...

Page 2: ...any way can cause the product to overheat Mounting This product can be installed in any orientation Mounting the product to a stable rigid operating surface and using shock mounts will reduce noise and vibration INSTALLATION Accessories The product s external intake and exhaust muffler will provide adequate filtration in most applications Check filters periodically and replace when necessary Consu...

Page 3: ...em or an equipment grounding terminal or lead on the product Power supply wiring must conform to all required safety codes and be installed by a qualified person Check that supply voltage agrees with that listed on product nameplate Extension cords Use only a 3 wire extension cord that has a 3 blade grounding plug Connect extension cord plug to a matching 3 slot receptacle Do not use an adapter Ma...

Page 4: ...ollow proper shutdown procedures to prevent product damage 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 Fol...

Page 5: ...responsible for freight charges both to and from Gast in all cases This warranty does not apply to electric motors electrical controls and gasoline engines not supplied by Gast Gast s warranties also do not extend to any goods or parts which have been subjected to misuse lack of maintenance neglect damage by accident or transit damage THIS EXPRESS WARRANTY EXCLUDES ALL OTHER WARRANTIES OR REPRESEN...

Page 6: ...1 AP119 AT275 12 RETAINER SCREWS 2 AT283 AT283 13 RETAINER PLATE 1 AT715 AT566A 14 PISTON CUP 1 AT329 AT280 15 FAN 1 AP108A AP108A 16 GRILLE SHROUD 1 AP107A AP107A 17 VALVE PLATE ASSEMBLY 1 AP102A AP102A 18 FILTER 1 B300A B300A SERVICE KIT 1 K806 K806 EXPLODED PRODUCT VIEW PARTS ORDERING INFORMATION 74R shown Item not shown Denotes parts included in the Service Kit Parts listed are for stock model...

Page 7: ...3 13 RETAINER PLATE 2 AT566A 14 PISTON CUP 2 AT280 15 FAN 1 AP108A 15A FAN LEAD END 1 AP108 16 GRILLE SHROUD 1 AP107 17 O RING 4 AK846 18 TUBE 2 AP125A 19 VALVE PLATE ASSEMBLY 2 AP102A SERVICE KIT 1 K797 EXPLODED PRODUCT VIEW PARTS ORDERING INFORMATION Underside View 75R shown Item not shown Denotes parts included in the Service Kit Parts listed are for stock models For specific OEM models please ...

Page 8: ...ck power source Voltage wrong Check power source Worn cup piston hitting cylinder Replace Cylinder misadjustment Realign Leaky hose or check valve Replace Dirt or liquid on top of piston Inspect and clean Motor not wired correctly Check wiring diagram line voltage Blown head gasket Replace TROUBLESHOOTING CHART www gastmfg com ISO 9001 14001 CERTIFIED PART NO 70 6850 G496PL REV D World Headquarter...

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