General Pump 72 User Manual

GEARBOX-71 & 72 SERIES

8

Owner’s Manual

• Installation

• Use

• Maintenance

Ref 300761 Rev.B

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General Pump is a

member of the

Interpump Group

GENERAL PUMP

INDEX

1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3

2. SYMBOL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3

3. SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3

4. CHOICE OF REDUCTION GEAR UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3

4.1 Identification of the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3

4.2 Identification of the reduction gear unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4

4.2.1 Gear ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4

5. DIMENSIONS AND WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5

6. INSTRUCTIONS FOR USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5

6.1 Lubricating Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5

6.2 Connection to the reduction gear unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 6

6.3 Direction of rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 6

7. INSTALLING THE REDUCTION GEAR UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 7

7.1 Choice of drive position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 7

7.2 Installation of the reduction gear unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 7

A member of the Interpump Group

Gearbox-71 & 72 Series

8. DISMANTLING THE REDUCTION GEAR UNIT . . . . . . . . . . . . . . . . . . . . . . . . . .Page 10

9. SCREW TIGHTENING TORQUES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 11

10. TOOLS TO BE USED FOR REPAIRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 11

11. WARRANTY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 11

12. EXPLODED VIEWS AND PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 12

13. MAINTENANCE LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 13

Ref 300761 Rev.B

12-11

Page 2

GENERAL PUMP

A member of the Interpump Group

Gearbox-71 & 72 Series

1. INTRODUCTION

This manual provides instructions for use, maintenance and repair of the speed reduction unit for 71 and 72 Series pumps
and must be read carefully before the gearbox is installed and used. Unless otherwise stated, reference should be made
to the specific manual for each pump. The regular functioning and working life of the pump require that the latter be used
and maintained correctly. General Pump will accept no responsibility for damage caused by negligence or by failure to
abide by the specifications given in this manual.

On receiving the reduction gear unit, check that it is complete and report any irregularities before installing on the pump.

2. SYMBOL DESCRIPTIONS

Warning

Potential Danger

Read carefully and understand
the manual before operating
the pump

3. SAFETY

Improper use of pumps and high pressure systems, and refusal to comply with regulations for installation and
maintenance, may lead to serious damage to persons and/or objects. Personnel who either install or use high pressure
systems must have the required qualifications, must know the characteristics of the components to be assembled or used
and, finally, must adopt all precautions necessary to ensure maximum safety under any type of operating conditions. In the
interests of safety, no reasonable precaution should be omitted either by the installer or the operator.

4. CHOICE OF REDUCTION GEAR UNIT

4.1 Identification of the pump

Note the RPM given on the plate in Fig. 1, position 2.

The plate also gives the model, version and
serial number which, together with the
serial number to be found the side of the
crankcase (Fig. 1, position 1), must always
be specified when ordering parts.

Ref 300761 Rev.B

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GENERAL PUMP

4.2 Identification of the gear unit

The unit can be identified by the symbol on the outside
of the housing. The plates indicating the gear ratio and
the direction of rotation are affixed (see Fig. 2).

The plate giving the direction of rotation is present if the
gear unit is supplied with the pump. Conversely, it must
be affixed by the user and include the direction of
rotation given in section 6.3.

4.2.1 Gear ratio

A member of the Interpump Group

Gearbox-71 & 72 Series

The gearbox is available in three different ratios:

1.25:1

1.50:1

1.83:1

4.2. On the job test

The maximum rated RPM of the pump must never be exceeded

Example: Pump KF40A

Maximum Internal Pump Speed: 900 RPM
Input Shaft Speed: 1500 (set by the user)

Input Speed/Internal Speed = Gear Ratio or Input Speed/Gear Ratio = Internal Speed

In this case the only ratio possible which does not exceed the maximum pump rated RPM is 1.83:1, in as
much as: 1500/1.25 = 1200 RPM Internal speed, 1500/1.5 = 1000 RPM Internal Speed and 1500/1.83 =

820 RPM Internal Speed. Therefore 1.83:1 is the only gear ratio permissable.

Ref 300761 Rev.B

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