Enerpac GA-1, Instruction Sheet

a shut-off valve between the gauge and the 

high-pressure line.
Should the hydraulic gauge be left in opera-

tion continuously, the calibration of the gauge 

may be greatly affected, requiring recalibration 

or complete replacement. Shut-off valves are 

recommended as added protection for any hy-

draulic gauge that may be subjected to high 

cycle rates or pressure fluctuations.

A

B

C

(1)

(2)

(3)

L

Pump 

outlet port

Hose or 

coupler

(1)   Gauge
(2)   Shut-off Valve
(3)   Gauge Adaptor

4.0  INSTALLATION
NOTE:

 When making hydraulic connections, 

use high quality sealing compound only on the 

threads of the male NPT fittings. If you use Tef-

lon tape, do not tape the first thread. Use tape 

sparingly. Loose Teflon tape in your pump or 

cylinder can cause malfunctions and damage. 

Wrap tape so that it tightens upon assembly 

(clockwise with the threads facing you). Install 

your hydraulic gauge where it is easily read-

able but well protected against damage from 

external sources.
1.  Remove the hydraulic oil outlet plug(s) from 

your pump.

2.  

Apply sealant (or Teflon tape) to male 

NPT threads. Make connections as 

pictured above. When tightening hydraulic 

connections and fittings, use the proper 

open-end wrenches. Do not use crescent 

or pipe wrenches, as they may damage the 

high-pressure fittings.

5.0  OPERATION

The gauge should be operated at pressures 

which do not normally exceed 75% of full 

scale.
Using the gauge to read less than 10% of the 

full scale can result in an erroneous reading.

IMPORTANT: 

The gauge should be checked 

for accuracy on a periodic basis, especially 

when the pressure measurement is critical and 

a gauge failure or inaccuracy will create a haz-

ard to personnel or property.

75%

10% 

6.0  REPAIR AND SERVICE INFORMATION

Enerpac gauges are precalibrated by the fac-

tory to within ±1% and ±1

1/2

% of the full scale. 

For recalibration, please refer to your local 

phone or business directory. For warranty and/

or repair service, send your gauge to the near-

est Enerpac Service Center. 

6.1  Glycerin Gauge Maintenance

For maintenance, please contact your nearest 

authorized Enerpac Service Center. The pro-

cedure for filling the glycerin gauge is covered 

in Enerpac’s Instruction Sheet, L2561.

3