Wachs HPU-20 User Manual

E.H. Wachs
600 Knightsbridge Parkway
Lincolnshire, IL 60069
www.ehwachs.com

HPU-20 Hydraulic Power Unit

User’s Manual

E.H. Wachs Part No. 14-MAN-35
Revision 0, June 2016

IMPORTANT: Read this manual carefully

before starting and operating the power unit.

Copyright © 2016 E.H. Wachs. All rights reserved.

This manual may not be reproduced in whole or in part

without the written consent of E.H. Wachs.

Table of Contents

Table of Contents

Chapter 1: About the HPU-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Chapter 2: Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operator Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Protective Equipment Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Safety Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Safety Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Chapter 3: Using the HPU-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Lifting and Moving the HPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Set-Up Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Fill the Hydraulic Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Connect Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Connect Hydraulic Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Operating Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Hydraulic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Chapter 4: Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Ordering Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Return Goods Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

E.H. Wachs Part No. 14-MAN-35, Rev. 0-0616 i

HPU-20 Hydraulic Power Unit

ii Part No. 14-MAN-35, Rev. 0-0616 E.H. Wachs

Chapter 1

About the HPU-20

The Wachs HPU-20 hydraulic power unit provides 18 gpm
hydraulic flow at a maximum pressure of 1800 psi (57 l/
min at 124 bar). The unit is powered by a 20 HP electric
motor.

Before operating the unit, read and understand the instruc­tions in this manual.

FEATURES

The HPU-20 hydraulic power unit includes the following
standard features:

• 20 HP electric motor (380-460 V, 50/60 Hz).

• Line reactor to suppress noise.

• Over Temp/Low Oil warning light.

• Pendant with controls for power on/off, speed (flow),

flow direction, and emergency stop.

• Removable mobile base with non-marring casters.

• Five-point lifting system.

• 10 micron hydraulic oil filter.

• Heat exchanger with digital readout.

• Helical cut, ultra quiet hydraulic gear pump.

• Powder coat finish.

The following figures illustrate the features of the HPU-20
power unit.

E.H. Wachs Part No. 14-MAN-35, Rev. 0-0616 1

HPU-20 Hydraulic Power Unit

Main power/
panel
disconnect

Over temp/
low oil
warning light

Reservoir oil
temperature
and level gauge

Reservoir oil
drain plug

Mobile base
(removable)

Panel lock
fasteners (4)

Figure 1-1. The photo shows the front of the HPU-20.

2 Part No. 14-MAN-35, Rev. 0-0616 E.H. Wachs

Hydraulic oil
filter

Variable
frequency
drive

Hydraulic oil
cooler

Hydraulic
valve

Oil fill/
breather

Electrical
panel

Operating
pendant

Figure 1-2. The photo shows operating features of the
HPU-20.

E.H. Wachs Part No. 14-MAN-35, Rev. 0-0616 3

HPU-20 Hydraulic Power Unit

Power
input

Pressure
gauge

Hydraulic
valve

Hydraulic
manifold

Hose
fittings

4 Part No. 14-MAN-35, Rev. 0-0616 E.H. Wachs

Figure 1-3. The photo shows operating features of the
HPU-20.

Figure 1-4.

Pressure port:
1/2” NPT adapter (part no. 90­058-12) and male quick dis­connect (part no. 09-026-00)

Return (tank) port:
1/2” NPT adapter (part no. 90­058-12) and female quick dis­connect (part no. 09-025-00)

Figure 1-5. The drawing identifies the hydraulic fit­tings on the HPU-20.

SPECIFICATIONS

• Flow: 4-18 gpm @ 1800 psi (15-68 l/min @ 124 bar)

• Pressure: Factory set at 1800 psi (124 bar)

• Dimensions (with base): 34.5” l x 52.5” h x 26” w

(88 cm x 133 cm x 66 cm)

• Weight: 850 lb (386 kg), including oil and mobile base

• Hydraulic Oil Capacity: 30 gallons (114 liters)

• Hydraulic Relief Pressure: 1800 psi (124 bar)

• Current Draw: 30 amps

• Operating Temperature: 110° F (43° C)

• Noise Level: 62 dB at full flow and operation.

E.H. Wachs Part No. 14-MAN-35, Rev. 0-0616 5