© 2019 Enerpac, All Rights Reserved.
5
6.0 INSTALLATION
6.1 Before You Begin
1. Be sure that ALL calculations (bolt load,
hydraulic pressure, etc.) have been made
prior to starting the tensioning process
and that they have been reviewed and
approved by a qualified engineer with
bolting experience.
2.
Be sure all personnel involved in this
procedure are trained in joint tightening
procedures and the tensioning equipment
being used. Ensure that all personnel read
and understand the safety information
contained in sections 2.1 and 2.2 of this
document.
3.
Be sure that the pump reservoir oil
capacity is adequate for the number of
tensioners to be used in the circuit. Refer
to Table 1 for tensioner oil volumes.
4.
Be sure all personnel are aware of
the maximum working pressure and
maximum stroke applicable to the
tensioner(s) being used. This information
is stamped on the tensioner body. See
Section 3.0 for additional information.
Table 1 - Tensioner Oil Volumes
Series
Maximum Oil Volume at Maximum
Stroke (each tensioner)
fluid ounces (US)
cubic
centimeters
HM1
0.38
11.4
HM2
0.71
21.0
HM3
0.96
28.4
HM4
1.26
37.3
HM5
1.63
48.3
HM6
2.37
70.2
HM7
2.95
87.1
HM8
3.69
109.0
HM9
4.06
120.1
HM10
4.76
140.8
HM11
5.92
175.2
HM12
7.34
217.1
HM13
10.27
303.6
HM14
14.06
415.9
HM15
18.46
544.9
Note:
To determine total oil volume required, multiply
the oil volume for your tensioner series by the number of
tensioners to be used in the circuit. Oil volumes shown
are approximate. Additional oil will be contained inside
hoses and fittings.
5.0 SETTING UP
5.1 Hydraulic Oil
Oil requirements will vary, depending on
pump model and type. Refer to your pump
instruction manual for oil specifications. Failure
to use genuine Enerpac hydraulic oil may void
warranty.
5.2 Hoses and Fittings
All hydraulic hoses and fittings used in the
circuit must be rated at or above the maximum
working pressure of the tensioner - 1500 bar
[21,750 psi].
To ensure safe and reliable operation, use
of Enerpac approved high pressure hoses is
strongly recommended. Refer to the Enerpac
Bolting Solutions Catalog for a complete
list of available hoses, fittings and related
accessories.
5.3 Pump Requirements
This bolt tensioning equipment has been
designed to be used in conjunction with a
hydraulic pump unit. Enerpac can offer a range
of pump options to suit particular applications
and thus operators should refer to the specific
instruction manual for the pump to be used.
The safety rationale used in the design of this
tensioner has assumed a pump maximum
working pressure appropriate for the tool and
using hydraulic oil Enerpac HF oil ISO32.
Enerpac HF oil is available at your local Enerpac
Distributor or Authorized Service Centre.
Hydraulic connection is made using quick
disconnect male & female couplers. In the event
an alternative pump unit is used, additional
safety measures such as pressure relief valves
or bursting discs must be considered to ensure
over-pressurisation cannot occur.
The following are recommended pump
parameters:
AIR SUPPLY : 1/2” nominal bore supply line
AIR CONSUMPTION: 28 CFM at 100 psi
AIR PRESSURE: 80 - 100 psi (80 psi optimum)
See pump manual for operating instructions.
