Enerpac SQD Series Operating instructions

L2367 Rev. A 7/98 Refer to Repair Parts Sheet # RPS59.106-1
SERVICE INSTRUCTIONS:These service instructions are intended to be used by qualified
personnel at Authorized Enerpac Service Centers.Users of Enerpac Equipment should see
the torque wrench instruction sheet for operation and maintenance information.
Important: This guide shows how to completely tear down the torque wrench. The wrench should
be tested prior to service to help target possible problems. Please refer to the torque wrench test
procedure on page 3 and troubleshooting guide on page 4.
YOU MAY NEED:
* Test bench * Manual puller * Soft jaw vise
* Spanner wrench * Brass Picks * Torque Wrench pump
* Soft blow hammer * Round steel stock * Needle nose pliers
* Metric allen wrench set * Pliers * Manual torque wrench
®
A UNIT OF APPLIED POWER INC.
Service Instructions
SQD Series Torque Wrench
DISASSEMBLY
1. Remove E-clip (item 2.17) from Connecting Bolt
(item 1.7).
2. Remove Cap (item 1.2) from the Swivel Housing
(item 1.6).
3. Remove Swivel Housing (item 1.6), by clamping
the housing in a soft jaw vise and pulling up on
the wrench. Warning: ( Be careful not to pull
towards your body).
Note: If you are unable to pull the Swivel Housing
free, you may need to use a small mechanical
puller to remove the housing by using the
Connecting Bolt (item 1.7) as the center point.
4. Remove the Snap catch (item 2.1) and the
compression spring without losing the spring.
5. Loosen the two Button Head Screws from the
top of the Wrench Housing (item 2.6).
6. To remove the Connecting Bolt (item 1.7) follow
the procedure below.
A. Loosen the set screw using an allen wrench.
B. Remove the Connecting Bolt (item 1.7),
from the Wrench Housing (item 2.6) using a
slim box wrench. (See Special Tools,
Figure 2.)
Note: Dimensions for the wrench needed are in
the back of this instruction sheet.
7. Remove the five o-rings from the Connecting
Bolt (item 1.7) using a brass pick.
8. Remove the Stop Ring (item 2.13) using a
spanner wrench.
9. Remove the two Button Head Screws on the
Protection Plate (item 2.3) using an allen wrench.
Remove plate from wrench.
10. Remove the Cap Screw from the Ratchet Lever
(item 3.8), using an allen wrench.
11. Push the Ratchet Lever (item 3.8) into the
wrench and then pull the lever back out to make
clearance between the Ratchet Lever (item 3.8)
and the Piston assembly. Remove the Ratchet
Lever (item 3.8) by pulling it up and out of the
front of the wrench.
12. Remove the Ratchet Block (item 3.2) and two
springs from the Ratchet Lever (item 3.8) by
pushing to either side. Take care not to lose the
springs.
13. Remove the Cap Screw from the Piston Bottom
(item 2.12). Use a pliers to hold the Compression
Member (2.9) in. Take care not to damage it with
the pliers.

SQD Series Torque Wrench
14. Once the Cap Screw is removed, use the pliers
to pull the Compression Member (item 2.9) from
the Piston Assembly. The Compression Member
(item 2.9) has a ball bearing in the threaded
hole, and is connected to the Piston Rod, (item
2.11) with a internal O-ring.
15. Push the Piston Rod (item 2.11) and Piston
Bottom, (item 2.12 ) out the back of the wrench
using a punch. A hammer is not necessary as
the Piston Assembly should come out freely.
16. Gently pull the Piston Bottom (item 2.12) from
the Piston Rod (item 2.11). It is also connected
together by an internal O-ring.
17. Remove the two bearings, Glyd-ring and O-ring
from the Piston Assembly.
18. To remove the two drive bearings (item 3.4), use
a socket and soft blow hammer to carefully drive
them out.
19. Use a brass pick to remove the Glyd-ring,
Bearing and O-rings in the Wrench Housing
(item 2.6).
INSPECTION
1. Examine the Wrench Housing’s interior, (item
2.6) for signs of wear or scratches.
2. Inspect the Compression Bolt (item 2.8) and
Ratchet Lever (item 3.8) for signs of excessive
wear.
3. Examine the Piston Assembly for signs of wear
and scratches that may cause leakage.
4. Inspect the Ratchet Wheel (item 3.5) and the
Ratchet Block (item 3.2) for broken teeth, cracks
and wear.
5. Examine all O-rings, Bearings, and Glyd-rings
for wear, scratches and possible deformation
from incorrect fluids.
6. Make sure all threads are in good condition.
ASSEMBLY
1. Replace two O-rings, bearing and Glyd-ring in the
Wrench Housing (item 2.6). To install the Glyd-
ring, form the ring as shown in Figure 1, and
then use round stock to reform the ring.
Note: When replacing seals, it is important to
use the grease provided in the repair kit when
reassembling.
2. Replace the two bearings, two O-rings, and the
Glyd-ring on the Piston Rod (item 2.11) and
Piston Bottom (item 2.12). Then push the two
pieces together.
3. Gently push the Piston Assembly into the
Wrench Housing (item 2.6), being careful not to
damage any seals or bearings.
4. Through the front of the wrench, push the
Compression Member (item 2.9), into the Piston
Rod (item 2.11). Position the larger end of the
Compression Member toward the top of the
wrench.
5. Reinstall the Cap Screw in the Piston Assembly,
while holding the Compression Member (item
2.9) in place with a pliers. Be careful not to
damage it.
6. If replacing drive bearings, use a socket to
push them back into place using a soft blow
hammer. Be careful not to damage bearings
during assembly.
7. The Compression Bolt (item 2.8) has a slight
offset hole to one side. The hole should face the
top of the Ratchet Lever (item 3.8) when rein-
stalling into the clearance hole.
8. Place together the Ratchet Wheel (item 3.5) and
Ratchet Block (item 3.2). Slide these pieces into
the Ratchet Lever (item 3.8) with the springs.
Note: Make sure the Ratchet Wheel and
Block are both centered in the Ratchet Lever.
9. Push the Compression Member (item 2.9) into
the wrench so that the Ratchet Lever (item 3.8)
can be reinstalled.
10. Before installing the Ratchet Lever (item 3.8),
make sure the ball bearing is in the threaded
hole of the Compression Member (item 2.9).
11. Install the Ratchet Lever (item 3.8) into the
Wrench Housing (item 2.6).
2

3
SQD Series Torque Wrench
12. Push the Piston Assembly up to the front of the
wrench to tighten the Ratchet Lever (item 3.8)
to the Compression Member (item 2.9). Make
sure the ball bearing does not fall out of the
Compression Member before tightening.
13. Screw Stop Ring (item 2.13) into Wrench
Housing (item 2.6).
14. Install Protection Plate (item 2.3) with the two
Button Head Screws.
15. Install two Button Head Screws to top of
Wrench Housing (item 2.6).
16. With Open End Wrench, screw Connecting Bolt
(item 1.7), into Wrench Housing (item 2.6), after
replacing all O-rings.
Note: Be careful not to over tighten item # 1.7
because it is steel and the Housing is Aluminum,
which could cause stripping of the threads.
17. Slide Snap-catch (item 2.1) over the Connecting
Bolt (item 1.7) with concave holes towards the
wrench.
18. With couplers attached, Push Swivel Housing
(item 1.6) onto the Connecting Bolt (item 1.7).
Be careful not to cut the rings when assembling.
19. Place Cap (item 1.2) onto the Swivel Housing,
(item 1.6). Reinstall the E-clip using a needle
nose pliers.
TEST PROCEDURE
1. Connect wrench to Enerpac Torque Wrench Pump.
2. Install square drive and socket onto the torque
wrench.
3. Use a nut and bolt test stand to test the wrench.
4. Turn pump on and tighten bolt to 1000 PSI.
5. Then switch the wrench and loosen the nut.
Note: It may take slightly higher pressure to
loosen the nut than to tighten it.
6. Continue this process increasing by 1000 psi
increments to 10,000 psi to tighten it.
7. The unit should not leak fluid, and ratchet freely.
Figure 1.
SPECIAL TOOLS
Special open-end wrench for removing Connecting
Bolt (item 1.7).
Figure 2.
Spanner wrench for all wrenches.
Pin size
.25”
Spread for spanner wrench
3” Max. Spread
Wrench Model
SQD25 SQD50 SQD100 SQD160 SQD270
H 7/8” 7/8” 7/8” 1-1/4” 1-1/4”
t 0.1872” 0.1872” 0.1872” 0.2340” 0.2340”
WRENCH OPENING
H
WRENCH THICKNESS
t

4
SQD Series Torque Wrench
TROUBLESHOOTING GUIDE
PROBLEM PROBABLE CAUSE REMEDY
Wrench leaks from Relief valve seat is worn Replace Swivel
relief valve Coupler
Over-pressurization to Turn Pressure down
wrench
Restriction in return Replace coupler or
line check valve on pump
Wrench will not Bolt broke on Ratchet Replace bolt and
Ratchet lever inspect parts
Piston is seperated from Attach Piston
Compression Member to Member
Teeth broke on Ratchet Replace Ratchet
Wheel or Block Assembly
Wrench Leaks Seals Damaged or Replace all seals
Worn with repair kit
Wrench will not Pressure too low from Increase pressure
loosen nut pump from pump
Australia
ENERPAC
Applied Power Australia, Ltd.
P.O. Box 261 Regents Park
Sydney, N.S.W. 2143
Tel: (61) (2) 9743 8988
Fax: (61) (2) 9743 8648
CIS
Applied Power Moscow
Leninsky Prospekt 95A
117313 Moscow, Russia
Tel: [phone]
Fax: [phone]
France, Switzerland,
Turkey, Greece, Africa,
Middle East
ENERPAC S.A.
Parc d'Activitié du Moulin
de Massy
1 rue du Saule trapu, BP200
F-91882 Massy CEDEX
(Paris) France
Tel: [phone]
Fax: [phone]
Germany, Scandinavia,
Eastern Europe, Austria,
Switzerland
ENERPAC
Applied Power GmbH
P.O. Box 30 01 13
Mündelheimer Weg 51
40401 Düsseldorf 30
Germany
Tel: (49) (211) 47 14 90
Fax: (49) (211) 4714 928/940
Holland, Belgium,
and Luxemburg
ENERPAC B.V.
P.O. Box 269, Storkstraat 25
3900AG Veenendaal
Holland
Tel: (31) (318) 535911
Fax: (31) (318) 525613/526645
Hong Kong
ENERPAC
Room No. 907, Workingberg
Commercial Building
41-47 Marble Road, North Point
Tel: [phone]
Fax: [phone]
India
ENERPAC
Hydraulics (India) Pvt Ltd.
203 Vardhaman Chamber
Plot #84, Sector 17
Vashi, New Bombay 400 705
India
Tel: [phone]
Fax: [phone]
Italy
ENERPAC
Applied Power Italiana S.p.A.
Via Canova, 4
20094 Corsico (Milano)
Italy
Tel: [phone]
Fax: [phone]
Japan
Applied Power Japan LTD
10-17 Sasame Kita-cho
Toda-City
Saitama 335,
Japan
Tel: [phone]
Telex: J26275
Fax: [phone]
Mexico
ENERPAC
Applied Power Mexico S.A. de C.V.
Av. Principal La Paz #100
Fracc. Industrial La Paz
42084 Pachuca. Hidalgo, Mexico
Tel: [phone]
Fax: [phone]
Singapore
Applied Power Asia Pte Ltd.
47 Jalan Pemimpin #01-02
01-03 Sin Cheong Building
Singapore 2057
Thomson Road P.O. Box 114
Singapore 9157
Tel: [phone]
Fax: [phone]
South Korea
ENERPAC
Applied Power Korea Ltd.
163-12, Dodang-Dong
Wonmi-gu, Buchun-Shi,
Kyunggi-Do
Korea
Tel: (82) (32) 675 0836
Fax: (82) (32) 675 3002
United States, Canada,
Latin America and
Caribbean
ENERPAC
13000 West Silver Spring Drive
Butler, Wisconsin 53007, USA
Tel: [phone]
1-800-433-2766 (End User)
1-800-558-0530 (Distributor)
Fax: [phone]
Canada
Tel: [phone] (End User)
Tel: [phone] (Distributor)
Latin America and Caribbean
Tel: [phone]
Tel: [phone]
Fax: [phone]
All Enerpac products are guaranteed against defects in workmanship and materials for as long as you
own them. Under this guarantee, free repair or replacement will be made to your satisfaction.
For prompt service, contact your Authorized Enerpac Service Center.
PRINTED IN U.S.A.
R
Spain, Portugal
ENERPAC
Applied Power International, S.A.
Calle de la Imprenta, 7
Polígono Industrial
28100 Alcobendas (Madrid)
Spain
Tel: [phone]
Fax: ( 34) 1 661 47 89
United Kingdom, Ireland
ENERPAC Ltd. Unit 3
Colemeadow Road
North Moons Moat
Redditch, Worcester B98 9BP
England
Tel: [phone]
Fax: [phone]