TU Series
OPERATION AND MAINTENANCE
MANUAL
TU Series Hydraulic Torque Wrenches
MODELS TU-2, TU-3, TU-7, TU-11, TU-20, TU-27 & TU-60
1025 Conroy Place, Easton, PA. 18040 * U.S.A.
Phone: +1 610-250-5800 * Fax: +1 610-250-2700
Toll Free: 1-888-TORCUP-1
Email: sales@torcup.com * Website: www.torcup.com
Operational and Maintenance Manual for TorcUP
1/21
TU-2, TU-3, TU-11, TU-20 ,TU-27 AND TU-60
Square Drive Hydraulic Torcque Wrenches
Version 1: 2015 February
Series TU-2, TU-3, TU-7, TU-11, TU-20, TU-27 and TU-60 Square Drive Hydraulic Torque Wrenches
are designed for installing and removing threaded fasteners requiring precise high torque during bolt
makeup and maximum torque during bolt breakout.
TorcUP Inc. is not responsible for customer modication of tools for applications on which TorcUP Inc.
was not consulted.
IMPORTANT SAFETY INFORMATION ENCLOSED.
READ THIS MANUAL BEFORE OPERATING TOOL.
IT IS THE RESPONSIBILITY OF THE EMPLOYER TO PLACE THE INFORMATION IN THIS
MANUAL INTO THE HANDS OF THE OPERATOR.
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN INJURY.
USING THE TOOL
• Always operate, inspect and maintain this tool in accordance with American National Standards Safety
Code for Hydraulic Rams and Jacks (ANSI B30.1)
• This tool will function using an air or electric powered hydraulic pump. Adhere to the pump safety require
ments and follow instructions when connecting the pump to the tool.
• Use only equipment rated for the same pressure and torque.
• Use only a hydraulic pump capable of generating 10,000 psig (681 bar) maximum pressure with this tool.
• Use only twin line hydraulic hose rated for 10,000 psig (681 bar) pressure with this tool.
• Do not interchange the male and female swivel inlets on the tool or the connections on one end of the
hose. Reversing the inlets will reverse the power stroke cycle and may damage the tool.
• Do not use damaged, frayed or deteriorated hoses and ttings. Make certain there are no cracks, splits
or leaks in the hoses.
• Use the quick connect system to attach the hoses to the tool and pump. Make certain the spring-loaded
retaining rings are fully engaged and the safety rings are tightly threaded against the spring-loaded retain
ing rings to prevent the connectors from disengaging under pressure.
• When connecting hoses that have not been preloaded with hydraulic oil, make certain the pump reservoir
is not drained of oil during start-up.
• Do not remove any labels. Replace any damaged label.
• Do not handle pressurized hoses. Escaping oil under pressure can penetrate the skin, causing serious
injury. If oil is injected under the skin, see a doctor immediately.
• Never pressurize uncoupled couplers. Only use hydraulic equipment in a coupled system.
• Always wear eye protection when operating or performing maintenance on this tool.
• Always wear head and hand protection and protective clothing when operating this tool.
The use of other than genuine TorcUP replacement parts may result in safety
hazards, decreased tool performance, and increased maintenance, and may
invalidate all warranties. Repairs should be made only by authorized
personnel. Consult your nearest TorcUP Authorized Service Center.
Refer All Communications to the Nearest TorcUP Ofce or Distributor.
For Technical Support & Information Contact:
TorcUP Inc.
1025 Conroy Place, Easton, PA 18040 USA
Phone: +1 610-250-5800 Fax:+1 610-250-2700
email: sales@torcup.com
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN INJURY
2/21
Do NOT exceed Maximum Pressure. See Torque Chart with Tool. Damage May Occur.
Do not use damaged,
frayed or deteriorated
hydraulic hoses
and ttings.
Always wear ear protection
when operating this tool.
Keep body stance
balanced and rm.
Do not overreach
when operating this
tool.
Always wear eye
protection
when
operating or
performing
maintenance
on this tool.
Do not carry
the tool
by the hose.
The Torque Reaction Arm must be
positioned against a positive stop.
Do not use the arm as a dead
handle. Take all precautions to
make certain the operator’s hand
cannot be pinched between the
arm and a solid object.
USING THE TOOL
• Keep hands, loose clothing & long hair away from the reaction arm and working area during operation.
• This tool will exert a strong reaction force. Use proper mechanical support and correct reaction arm
positioning to control these forces. Do not position the reaction arm so that it tilts the tool off the axis of
the bolt and never use the swivel inlets as a reaction stop.
• Avoid sharp bends and kinks that will cause severe back-up pressure in hoses an lead to premature
hose failure.
• Use accessories recommended by TorcUP.
• Use only impact sockets and accessories. Do not use hand (chrome) sockets or accessories.
• Use only sockets and accessories that correctly t the bolt or nut and function without tilting the tool off
the axis of the bolt.
• This tool is not insulated against electric shock.
• This equipment must not be operated or serviced unless the operator read the operating instructions
and fully understands the purpose, consequences and procedure of each step.
• When operating a larger tool (TU-20, TU-27 or TU-60) above waist height, employ a secondary means
of support for safety purposes. A tool sling or chains may be used. Consult your safety department for
further suggestions.
Depending on the working environment your local health and safety regulations may require
you protective gear (i.e. Ear Protection, Safety Shoes, Hard Hat, Gloves, Coveralls, etc.) In
case external forces are exerted on the equipment, non-compliance with these regulations may
result in injury. EAR PROTECTION MUST BE WORN WHEN OPERATING THIS TOOL.
PLACING THE TOOL IN SERVICE
3/21
CONNECTING THE TOOL
1. Attach the twin line hose to the swivel inlets of the square drive torque wrench using the
spring–loaded quick connect ends. After making certain that they are fully engaged,
thread the safety rings tightly against the spring–loaded retainer rings.
2. Connect the opposite ends of the hose to the pump in the same manner.
ADJUSTMENTS
SETTING THE SQUARE DRIVE FOR ROTATION
The position of the square drive when looking toward the shroud will determine if the tool is
set to tighten or loosen the nut. When the square drive extends to the left when looking at
the shroud with the inlets away from you, the tool is set to loosen the nut. When the square
drive extends to the right, the tool is set to tighten the nut. To change the direction of rotation
for model TU-2 TU-3, TU-7 and TU-11 simply push the square drive into the housing until the
drive projects out the opposite side of the tool. For model TU-20, TU-27 & TU-60, loosen and
remove the square drive retaining screw and pull the square drive out of the housing. Insert
the square drive into the opposite side of the housing and secure it by installing the screw in
the splined end of the drive.
SETTING THE TORQUE
After determining the desired torque, use the calibration certicate provided with the tool to
determine the pressure necessary to achieve that torque. You may also refer to the chart
engraved on the shroud of the tool or the chart provided on page 7 of this manual.
1. Connect the tool to the power supply and turn the pump on.
2. Depress the remote control button causing the pressure to be shown on the gauge.
3. Adjust the pressure by loosening the wing nut that locks the pressure adjustment thumb
screw. Rotate the thumbscrew clockwise to increase the pressure and counterclockwise
to decrease the pressure. When decreasing pressure, always lower the pressure below
the desired point and then bring the gauge back up to the desired pressure.
4.When the desired pressure is reached, retighten the wing nut and cycle the tool again to
conrm that the desired pressure setting has been obtained.
SETTING THE REACTION ARM
REACTION
CONTACT
POINTS
REACTION
CONTACT
POINTS
REACTION
CONTACT
POINTS
REACTION
CONTACT
POINTS
4/21
The function of a reaction device is to hold the tool in position against the forces generated to
tighten or loosen bolts or nuts. Hydraulic wrenches generate tremendous force.
An improperly
positioned reaction
arm may result in
operator injury
or damage tooling.
Square Drive Hydraulic Wrench Reaction Points (Dwg.01)
Make sure the reaction arm is positioned correctly.
(Refer to Dwg. 01).
The reaction arm can be positioned numerous
O
places within a 360
circle. However, for the arm to
be correctly positioned, it must be set within a 90O
quadrant of that circle. That quadrant is the area
located between the protruding square drive and
the bottom of the housing away from the swivel
inlets. It will always be toward the lower half of the
housing and on one side of the housing when
tightening and the other side when loosening.
OPERATING THE WRENCH
5/21
Square Drive Position for Loosening and Tightening(Dwg.02)
The position of the square drive relative to the shroud
determines whether the action will tighten or loosen the
nut. (Refer to Dwg. 02 for application examples).
The power stroke of the piston assembly will always
turn the square drive toward the shroud.
1. Place the square driver in the socket and the socket
on the nut. Make certain the square driver and socket
are the correct size for the nut and that the driver fully
engages the socket and the socket fully engages the
nut.
2. Position the reaction arm or surface against an
adjacent nut, ange or solid system component.
Make certain that there is clearance for the hoses,
swivels, inlets and end plug. DO NOT allow the tool
to react against the hoses, swivels, inlets or end plug.
3. After having turned the pump on and presetting the
pressure for the correct torque, depress the remote control button to advance the
piston assembly.
4. When the wrench is started, the reaction surface of the wrench or reaction arm will move
against the contact point and the nut will begin to turn.
5. When the nut is no longer turning and the pump gauge reaches the preset pressure,
release the remote control button. The piston rod will retract when the button is released
and under normal conditions, an audible “click” will be heard as the tool resets itself.
6. Continue to cycle the tool until it “stalls” and the preset psi/torque has been attained.
7. Once the nut stops rotating, cycle the tool one last time to achieve total torque.
LUBRICATION
6/21
Marine Moly Grease
Lubrication frequency is dependent on factors known only to the user. The amount of
contaminants in the work area is one factor. Tools used in a clean room environment will
obviously require less service than a tool used out-doors and dropped in loose dirt or sand.
Marine Moly Grease is formulated not to wash out of the tool in areas where
lubrication is critical.
Whenever lubrication is required, lubricate as follows:
1. Remove the drive plate, ratchet, drive segment and sleeves as instructed in the
maintenance section and wash the components in a suitable cleaning solution in a well
ventilated area.
2. After drying the components, wipe a lm of Marine Moly Grease onto the wear
surface of both sleeves and the ends of the ratchet.
3. Spread a light lm of Marine Moly Grease onto the inner face and both sides of the Drive
Plate. Do not pack the teeth of the drive segment or ratchet with lube. It can prevent the
teeth from engaging properly.
4. Place a daub of Marine Moly Grease in the piston rod recess of the drive plate before
linking the piston rod to the drive plate at assembly.
CRITICAL LUBRICATION
It is imperative to lubricate the piston rod recess of the drive plate to piston rod contact area
every 80 hours of continuous duty cycling.
Lubricate as follows:
1. Remove shroud screws, shroud, and roll pin.
2. Pry the drive plate assembly forward from the piston rod to expose the recessed
contact area in the drive plate.
3. With a rag, wipe clean the area and apply a sizeable amount of Marine Moly Grease.
4. Reassemble as instructed in the maintenance section.
TU Series Torque Conversion Chart
7/21
P.S.I.- FT.-lbs Bar.N.M.
P.S.I TU-2 TU-3 TU-7 TU-11 TU-20 TU-27 TU-60 Bar TU-2 TU-3 TU-7 TU-11 TU-20 TU-27 TU-60
.-lbs. .-lbs. .-lbs. .-lbs. .-lbs. .-lbs. .-lbs. N.M N.M N.M N.M N.M N.M N.M
1,000 132 347 790 1198 2249 3032 6202 69 179 470 1071 1624 3049 4111 8409
1,200 159 414 947 1433 2683 3606 7422 83 215 561 1284 1943 3638 4889 10062
1,400 185 481 1104 1668 3118 4180 8641 97 251 652 1497 2262 4227 5668 11716
1,600 212 547 1262 1904 3552 4755 9861 110 287 742 1710 2581 4816 6446 13369
1,800 238 614 1419 2139 3987 5329 11080 124 323 833 1924 2900 5405 7225 15023
2,000 265 681 1576 2374 4421 5903 12300 138 359 923 2137 3219 5994 8003 16677
2,200 292 748 1734 2612 4847 6469 13477 152 396 1015 2351 3541 6572 8771 18272
2,400 319 816 1892 2850 5273 7035 14654 165 433 1106 2565 3864 7150 9538 19868
2,600 346 883 2050 3088 5700 7600 15831 179 469 1197 2779 4187 7728 10305 21464
2,800 373 951 2208 3326 6126 8166 17008 193 506 1289 2994 4509 8305 11072 23060
3,000 400 1018 2366 3564 6552 8732 18185 207 542 1380 3208 4832 8883 11839 24656
3,200 427 1085 2525 3802 6974 9302 19378 221 579 1471 3423 5155 9455 12612 26273
3,400 454 1152 2683 4041 7396 9873 20571 234 616 1562 3638 5479 10028 13386 27890
3,600 481 1220 2842 4279 7818 10443 21763 248 652 1654 3853 5802 10600 14159 29507
3,800 508 1287 3000 4518 8240 11014 22956 262 689 1745 4068 6125 11172 14932 31124
4,000 535 1354 3159 4756 8662 11584 24149 276 725 1836 4283 6448 11744 15706 32742
4,200 561 1421 3317 4990 9077 12137 25344 290 761 1926 4497 6766 12306 16455 34361
4,400 588 1487 3475 5225 9492 12690 26538 303 797 2016 4711 7084 12869 17205 35981
4,600 614 1554 3632 5459 9906 13242 27733 317 833 2107 4925 7402 13431 17954 37601
4,800 641 1620 3790 5694 10321 13795 28927 331 869 2197 5139 7719 13994 18704 39220
5,000 667 1687 3948 5928 10736 14348 30122 345 904 2287 5353 8037 14556 19453 40840
5,200 694 1754 4106 6164 11158 14911 31317 359 941 2379 5568 8357 15128 20217 42460
5,400 721 1822 4265 6400 11580 15474 32511 372 977 2470 5782 8677 15700 20980 44079
5,600 747 1889 4423 6635 12002 16037 33706 386 1013 2561 5997 8996 16273 21743 45699
5,800 774 1957 4582 6871 12424 16600 34900 400 1050 2653 6212 9316 16845 22507 47319
6,000 801 2024 4740 7107 12846 17163 36095 414 1086 2744 6427 9636 17417 23270 48938
6,200 828 2092 4901 7348 13271 17720 37293 427 1123 2837 6645 9963 17993 24026 50562
6,400 855 2160 5063 7589 13696 18278 38491 441 1160 2929 6864 10290 18569 24781 52186
6,600 883 2229 5224 7831 14120 18835 39688 455 1197 3022 7083 10617 19145 25537 53810
6,800 910 2297 5386 8072 14545 19393 40886 469 1234 3114 7302 10944 19721 26293 55434
7,000 937 2365 5547 8313 14970 19950 42084 483 1270 3207 7521 11271 20297 27049 57058
7,200 964 2432 5705 8547 15388 20510 43282 496 1306 3297 7735 11588 20863 27807 58683
7,400 990 2499 5863 8781 15806 21069 44480 510 1343 3388 7949 11905 21430 28566 60307
7,600 1017 2565 6021 9015 16223 21629 45678 524 1379 3478 8163 12223 21996 29325 61931
7,800 1043 2632 6179 9249 16641 22188 46876 538 1415 3569 8378 12540 22562 30083 63555
8,000 1070 2699 6337 9483 17059 22748 48074 552 1451 3659 8592 12857 23129 30842 65180
8,200 1098 2769 6505 9727 17492 23308 49272 565 1488 3754 8820 13188 23716 31601 66804
8,400 1126 2838 6674 9971 17925 23868 50470 579 1526 3848 9048 13518 24302 32360 68428
8,600 1153 2908 6842 10214 18357 24427 51667 593 1564 3942 9277 13849 24889 33119 70052
8,800 1181 2977 7011 10458 18790 24987 52865 607 1601 4037 9505 14179 25476 33878 71676
9,000 1209 3047 7179 10702 19223 25547 54063 621 1639 4131 9733 14510 26063 34637 73300
9,200 1236 3115 7342 10943 19653 26106 55260 634 1676 4223 9954 14837 26645 35395 74922
9,400 1263 3183 7505 11184 20082 26665 56456 648 1713 4316 10175 15164 27228 36153 76544
9,600 1291 3251 7668 11426 20512 27225 57653 662 1750 4408 10396 15491 27810 36912 78167
9,800 1318 3319 7831 11667 20941 27784 58849 676 1787 4500 10617 15818 28393 37670 79789
10,000 1345 3387 7994 11908 21371 28343 60046 689 1824 4592 10838 16145 28975 38428 81411
Disclaimer: Please consult the calibration chart specic to your purchase or rental tool.
TU-2,3,7,11 Series Wrench
8/21
TU-20 Series Wrench
9/21
TU-27 Series Wrench
10/21
TU-60 Series Wrench
11/21
Part Numbers For Ordering TU Series
12/21
Part TU-2 TU-3 TU-7 TU-11 TU-27 TU-60
1
2
Housing Threaded Plug N/A N/A N/A TU-11-39 TU-27-39 TU-60-39
3
4
5
6
7
8
9
10
11
12
14
16
17
18
19
20
Drive Segment Spring TU-2-27 TU-3-27 TU-7-27 TU-11-27 TU-27-27 TU-60-27
21
22
22
22
23
24
25
26
27
Piston Rod Assembly TU-2-17 TU-3-17 TU-7-17 TU-11-17 TU-27-17 TU-60-17-1
28
29
30
31
32
33
34
35
36
Sleeve Retainer Clips N/A N/A N/A N/A TU-27-41 TU-60-41
37
40
41
42
~
Reaction Arm Assembly TU-2-03 TU-3-03 TU-7-03 TU-11-03 N/A N/A
~
Square Drive Assembly TU-2-11 TU-3-11 TU-7-11 TU-11-11 N/A N/A
Housing TU-2-01 TU-3-01 TU-7-01 TU-11-01 TU-27-01 TU-60-01
Reaction Arm TU-2-03-1 TU-3-03-1 TU-7-03-1 TU-11-03-1 TU-27-39 TU-60-03-1
Reaction Arm Cover TU-2-03-7 TU-3-03-7 TU-7-03-7 TU-11-03-7 TU-27-03-7 TU-60-03-7
Cover Screws TU-2-03-8 TU-3-03-8 TU-7-03-8 TU-11-03-8 TU-27-03-8 TU-60-03-8
Reaction Arm Spring TU-2-03-6 TU-3-03-6 TU-7-03-6 TU-11-03-6 TU-27-03-6 TU-60-03-6
Locking Pin TU-2-03-3 TU-3-03-3 TU-7-03-3 TU-11-03-3 TU-27-03-3 TU-60-03-3
Retract Button TU-2-03-4 TU-3-03-4 TU-7-03-4 TU-11-03-4 TU-27-03-4 TU-60-03-4
Reaction Arm Screw TU-2-03-5 TU-3-03-5 TU-7-03-5 TU-11-03-5 TU-27-03-5 TU-60-03-5
Spline sleeve TU-2-03-2 TU-3-03-2 TU-7-03-2 TU-11-03-2 TU-27-03-2 TU-60-03-2
Square Drive TU-2-11-1 TU-3-11-1 TU-7-11-1 TU-11-11-1 TU-27-11-1 TU-60-11-1
Ball Plunger TU-2-11-3 TU-3-11-3 TU-7-11-3 TU-11-11-3 N/A N/A
Locking Pin TU-2-11-2 TU-3-11-2 TU-7-11-2 TU-11-11-2 N/A N/A
Sleeve TU-2-13 TU-3-13 TU-7-13 TU-11-13 TU-27-13 TU-60-13
Ratchet TU-2-05 TU-3-05 TU-7-05 TU-11-05 TU-27-05 TU-60-05
Drive Plate TU-2-09 TU-3-09 TU-7-09 TU-11-09 TU-27-09 TU-60-09
Drive Segment TU-2-07 TU-3-07 TU-7-07 TU-11-07 TU-27-07 TU-60-07
Roll Pin TU-2-19 TU-3-19 TU-7-19 TU-11-19 TU-27-19 TU-60-19
Flat Spring N/A TU-3-53 TU-7-53 TU-11-53 N/A N/A
Sleeve Ring TU-2-51 N/A N/A N/A N/A N/A
Ball Plunger N/A N/A N/A N/A TU-27-29 TU-60-29
Smalley Ring TU-2-43 TU-3-43 TU-7-43 N/A TU-27-43 TU-60-43
End Plug TU-2-15 TU-3-15 TU-7-15 TU-11-15 TU-27-15 TU-60-15
End Plug Seal TU-2-37 TU-3-37 TU-7-37 TU-11-37 TU-27-37 TU-60-37
Piston Seal TU-2-33 TU-3-33 TU-7-33 TU-11-33 TU-27-33 TU-60-33
Gland Seal TU-2-35 TU-3-35 TU-7-35 TU-11-35 TU-27-35 TU-60-35
Cylinder Gland TU-2-21 TU-3-21 TU-7-21 TU-11-21 TU-27-21 TU-60-21
Rod Seal TU-2-31 TU-3-31 TU-7-31 TU-11-31 TU-27-31 TU-60-31
Shroud TU-2-23 TU-3-23 TU-7-23 TU-11-23 TU-27-23 TU-60-23
Shroud Screws TU-2-25 TU-3-25 TU-7-25 TU-11-25 TU-27-25 TU-60-25
Swivel (2 req) STU-4M-4M STU-4M-4M STU-4M-4M STU-4M-4M STU-4M-4M STU-4M-4M
Coupler Set HC-S-100 HC-S-100 HC-S-100 HC-S-100 HC-S-100 HC-S-100
Threaded Retainer N/A N/A N/A N/A TU-27-11-6 TU-60-11-6
Cover Roll Pin N/A N/A N/A N/A N/A TU-60-03-9
Gland Wrench ATU-2-GW ATU-3-GW ATU-7-GW ATU-11-GW ATU-27-GW ATU-60-GW
Piston Inner Seal N/A N/A N/A N/A N/A TU-60-33
Piston Outer Seal N/A N/A N/A N/A N/A TU-60-34
con’t.
Part Numbers For Ordering TU Series TU-20
13/21
Part TU-20 QTY.
1 HOUSING TU-20-01 1
2 SPLINED SLEEVE TU-20-02 1
4 REACTION ARM TU-20-03-01 1
5 GATE TU-20-03-02 1
6 GATE LEVER LINK TU-20-03-03 1
7 GATE LEVER TU-20-03-04 1
8 GATE LEVER SPACER TU-20-03-05 2
9 GATE BOLT TU-20-03-06 1
10 REACTION ARM BOOT TU-20-03-07 1
11 GATE LINK PIN TU-20-03-08 2
12 GATE LEVER PIN TU-20-03-09 1
13 GATE SPRING TU-20-03-10 1
14 BOOT PIN TU-20-03-11 1
15 RATCHET TU-20-05 1
16 DRIVE SEGMENT TU-20-07 1
17 DRIVE PLATE TU-20-09 1
19 SQUARE DRIVE TU-20-11-1 1
20 THREADED RETAINER TU-20-11-8 1
21 SQUARE DRIVE SLEEVE TU-20-13 2
22 END PLUG TU-20-15 1
24 PISTON TU-20-17-1 1
25 PISTON ROD TU-20-17-2 1
26 ROD WIRE RING TU-20-17-3 1
27 ROD RETAINING RING TU-20-17-4 1
28 RETRACT SCREW TU-20-19 2
29 CYLINDER GLAND TU-20-21 1
30 SHROUD TU-20-23 1
31 SHROUD SCREWS TU-20-25 4
32 DRIVE SEGMENT SPRING TU-20-27 2
33 ROD SEAL TU-20-31 1
34 PISTON U-CUP SEAL TU-20-33 1
35 PISTON O-RING SEAL TU-20-34 1
36 GLAND SEAL TU-20-35 1
37 END PLUG SEAL TU-20-37 1
38 HOUSING SIDE PLUG TU-20-39 2
39 SLEEVE RETAINING RING TU-20-41 2
40 CYLINDER RING TU-20-43 1
41 SWIVEL SET TU-20-45 1
42 COUPLER SET TU-20-47 1
43 SLEEVE O-RING TU-20-51 2
MAINTENANCE SECTION
14/21
Always turn off the power supply, bleed off hydraulic uid from the hose
connections on the cylinder assembly and disconnect the hoses before
attempting to repair or perform maintenance on this tool. Always wear
eye protection when operating or performing maintenance on this tool.
DISASSEMBLY
GENERAL INSTRUCTIONS
1. Do not disassemble the tool any further than necessary to replace or repair damaged parts.
2. Use extra care not to score, nick or damage surfaces that will contain hydraulic oil under pressure.
3. Whenever grasping a tool in a vise, always use leather–covered or copper–covered vise jaws to
protect the surface of the part and help prevent distortion. This is particularly true of threaded
members and housings.
4. Do not remove any part that is press t in or on an assembly unless the removal of that part is
necessary for repairs or replacement.
5. Do not disassemble the hydraulic cylinder assembly unless you have a complete set of seals and
o–rings for replacement.
6. Use only British Standard fractional size tools when disassembling these tools.
DISASSEMBLY OF THE REACTION ARM ASSEMBLY
1. Push the reaction arm retract button (8) toward the reaction arm boot (4) and separate the
reaction arm assembly from the housing (1).
2. While holding the button down, use a hex wrench to unscrew and remove the reaction arm
spline screw (9).
3. Apply some downward pressure to the reaction arm engagement pin (7) and unscrew the
reaction arm retract button from the engagement pin.
4. Remove the engagement pin by sliding it out of the top of the reaction arm (3).
5. Pull the reaction arm splined sleeve (10) out of the reaction arm.
6. Using a hooked tool through the spline screw opening, pull the reaction arm pin spring (6)
out of the reaction arm.
7. To remove the reaction arm boot, use a hex wrench to unscrew the two boot mounting
screws (5) and pull the boot off the reaction arm.
DISASSEMBLY OF THE SQUARE DRIVE TOOL
1. Before attempting to disassemble a square drive tool, connect the tool to a pump and operate the
tool until the piston assembly (27) is in the fully retracted position.
2. Grasp the housing (1) in copper–covered or leather–covered vise jaws with the inlet end upward
and using a 3/4” wrench, unscrew and remove the two swivel inlets (33) with their attached
couplers (34).
3. Remove the housing from the vise jaws and with the inlet openings over a container to catch the
oil, drain as much hydraulic oil as possible from the housing.
4. Grasp the cylinder housing in copper–covered or leather–covered vise jaws with the
shroud (31) upward and using 1/4” allen wrench, unscrew and remove.
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MAINTENANCE SECTION
15/21
In the following step, the Shroud will spring to a straightened position
when the Screws at one end are removed. Hold the Shroud in position
until the Screws are removed and control the ex of the loose end.
5. Use a hex wrench to unscrew and remove the shroud mounting screws (32). Remove the shroud.
6. For TU-11, TU-20, TU-27 and TU-60 models, use a hex wrench to unscrew and remove the
retract pin hole plugs (2) from each side of the housing.
7. If the piston assembly is not fully retracted, use a brass drift or brass hammer to tap the
assembly inward until the retract pin (21) aligns with the cross holes in the housing.
Use a small drift to tap the retract pin out of the drive plate (18) and piston assembly through
the openings in the housing.
7a. For TU-20 socket head cap screws are used in the place of retract pin. Use hex wrench to
remove screws from each size fo drive plate.
8. For TU-2, TU-3, TU-7 and TU-11, and TU-20 models, insert a hex wrench through the larger
opening in the square drive and unscrew the square drive locking pin (14) inward against the
square srive spring (13) while pulling or pushing the square drive out of the tool. For TU-27 and
TU-60 models, unscrew and remove the square drive retaining screw (35). Pull the square drive
out of the tool.
9. For TU-2, TU-3, TU-7, TU-11, and TU-20 models, remove the drive plate, assembled with the
ratchet (17), drive segment (19) and segment springs (20) from between the ears of the
housing. Using nger pressure, push the sleeves (16) inward to remove them from the
housing.
10. For TU-20, TU-27 and TU-60 models, remove the two drive sleeve retainers (36) from the
housing. Pull one of the drive sleeves (16) out of the housing and while holding the drive plate,
the ratchet (17), segment pawl (19) and segment pawl springs (20), pull the remaining drive
sleeve out of the housing. Slide the assembled drive plate out of the housing.
11. Being careful not to let the springs eject from the assembly, slide the ratchet, drive segment and
segment springs out of the drive plate.
12. Locate the stake point on the threads of the cylinder gland (29) and housing. Using a 1/16” drill
bit centered on the stake point, drill approximately 3/32” deep in one continuous motion to
remove the thread and interference at that point.
13. Engage the pins of the cylinder gland wrench (40) with the holes in the cylinder gland and
using a socket on the hex of the wrench unscrew and remove the cylinder gland. Should the
gland not rotate freely after initial breakout, additional drilling, in small increments, may be
required to remove the obstruction.
14. If the piston rod seal (30) must be replaced, remove it from the central opening of the gland.
15. If the cylinder gland seal (28) must be replaced, remove it from the groove at the bottom of the
threads in the housing.
NOTICE
Cylinder gland is staked into the housing to prevent it from loosening
due to vibration or turbulence in the hydraulic oil ow. The stake point
must be drilled out before attempting to remove the cylinder gland.
MAINTENANCE SECTION
16/21
In the following step, DO NOT grasp the shaft of the piston
assembly with any device that will mar, bur or otherwise damage
the shaft or the drive plate end of the shaft.
16. Pull the piston assembly out of the housing. If the assembly is tight in the housing and difcult to
pull, inject air into the inlet opening while holding the Housing over a container that will not dam
age the piston when it is expelled. If an air hose is not available, temporarily attach the advance
line from the pump and cycle the tool to advance the piston out of the housing. Hydraulic oil will
be emitted with the piston, so the assembly must be held over a non–damaging container.
17. If the piston seal (26) must be replaced, remove it from the piston.
18. Push on the small end of the end plug (24) to remove it from the housing. If the end plug is tight
in the housing, insert a at face drift into the hole in the center of the small shaft, and without
cocking the plug, tap it out of the housing.
18 A. For the TU-20 model, insert a 1” square drive extension into the small hole in the end plug of
the TU-20. Unscrew the end plug from the splined sleeve. Once the two pieces are fully
unscrewed, slip the splined sleeve out of the end with the swivel inlets. Push the end plug out
of the cylinder end of the housing. If the end plug is tight in the housing, gently tap it out with a
at face drift without cocking it.
19. If the end plug seal (25) must be replaced, remove it from the end plug.
20. If thesmalley ring (23) needs replacement, use a thin blade screwdriver to work it out of the
groove in the housing.
ASSEMBLY
GENERAL INSTRUCTIONS
1. Use extra care not to score, nick or damage surfaces that will contain hydraulic oil under
pressure.
2. Whenever grasping a tool in a vise, always use leather–covered or copper–covered vise jaws to
protect the surface of the part and help prevent distortion. This is particularly true of threaded
members and housings.
3. Apply o–ring lubricant to all o–rings before nal assembly.
ASSEMBLY OF THE SQUARE DRIVE TOOL
1. If the smalley ring (23) was removed from the housing (1), install it in the internal groove
near the inlet end of the Housing.
2. Grasp the housing in leather–covered or copper–covered vise jaws with the inlet end downward.
3. Apply o–ring lubricant to the end plug seal (25) and install it in the annular groove at the large
end of the end plug (24).
4. Insert the assembled end plug, small end leading, into the piston bore of the housing and using
a brass drift in the center of the end plug; tap the assembly to 1/8” below the gland seal (28)
without cocking it.
For the TU-20 model, slip the splined sleeve into the housing from the end with the
swivel inlets, with the grooved end protruding from the housing. Insert a 1” square drive
extension through the splined sleeve and into the small end of the end plug. Applying force on
both the splined sleeve and end plug such that they are pushed towards each other, snugly
screw the male threads on the end plug into the female threads of the splined sleeve. The o ring lubricant from step 3 is useful to ease installation.
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MAINTENANCE SECTION
17/21
5. Apply o–ring lubricant to the piston seal (26) and install it in the annular groove at the large end
of the piston assembly (27).
6. If the piston rod seal (30) was removed from the cylinder gland (29), install a new seal, lip end
trailing, into the central opening of the gland.
7. Apply o–ring lubricant to the cylinder gland seal (28) and install it in the housing recess at the
bottom of the threads for the cylinder gland.
8. Insert the piston assembly, shaft end leading, into the threaded end of the gland through the
gland seal and push it inward until the large end of the piston is against the end of the gland.
9. Start threading the cylinder gland into the housing. Using the cylinder gland wrench (40) and a
socket, tighten the gland in the housing.
10. Reposition the assembled tool in the vise jaws with the inlet end upward.
11. Wrap the threads of the swivel sets (33) with teon tape. Thread the swivel with the male hose
coupler (34) into the threaded hole on the right (Marked A) side of the housing when looking from
the inlet end of the tool with the square drive downward. Thread the swivel with the female hose
coupler into the other hole (Marked R).
12. Connect the hoses from the pump, turn the power on and cycle the tool several times to deter
mine if the gland is leaking uid.
13. If the gland is leaking, disconnect the hoses and power supply, determine the cause of the leak
and take whatever steps are necessary to correct the problem. If the gland is not leaking,
operate the tool to fully retract the piston assembly, disconnect the hoses and power supply and
reposition the tool in the vise jaws with the inlet end downward.
In the following step, the cylinder gland must be staked into the Housing to prevent it from
loosening due to vibration or turbulence in the hydraulic oil ow. Use a center punch with a
60 degree included angle and do not deform the stake point beyond 3/64” deep. Do not attempt to use the previously staked position and leave housing clearance at the new position
for a 1/16” drill bit should the Gland require removal in the future.
14. Stake the thread of the gland and housing at the open area between the ears of the housing
that holds the square drive (11). Make certain both the housing and gland are deformed at the
stake point.
15. Wipe a thin lm of Marine Moly Grease on the sides of the drive plate (18), as well as the inner
race and piston rod recess of the drive plate.
16. Insert the ratchet (17) in the drive plate.
17. Position the drive segment (19) at the cavity in the drive plate. Make certain the teeth of the pawl
will properly engage the teeth of the ratchet. If they will not engage properly, reverse the ratchet
in the drive plate. Insert the segment pawl springs (20) into the holes in the pawl, and while
compressing the springs with nger pressure, slide the pawl and springs into the drive plate.
18. For TU-2, TU-3, TU-7 and TU-11 models, proceed as follows:
a) From inside the housing ears, insert a driver sleeve (16) into each ear with the detent end of the
sleeve trailing.
b) Position the assembled drive plate between the ears of the housing with the notch for the piston
rod toward the rod end.
c) Insert allen hex wrench into the larger hole on the end of the square drive (11) to loosen the
locking pin (14) until the ball plunger (12) is ush with the top of the square drive. Then align the
square opening of the ratchet (17) with the square opening of the sleeves (16).
Insert the square drive through the openings, and tighten the locking pin once in place.
Con’t.
MAINTENANCE SECTION
18/21
For TU-20, TU-27 and TU-60 models, proceed as follows:
a) Position the assembled drive plate between the ears of the housing with the notch for the position
rod toward the rod end.
b) From the outside of the housing ears, insert sleeves (16) into each ear with the small hub end
leading. The small hub must enter the recess on each side of the drive plate. Then insert sleeve
retainer clips (36) into groove to retain sleeves (24).
In the following step, the side of the housing that the square protrudes
from will determine the direction of square drive rotation. If the square
extends to the left side when looking from the inlet end of the housing,
rotation will be clockwise to tighten. A right side extension is
counterclockwise for loosening.
c) Insert the splined end of the square drive (11) through the driver sleeves and ratchet. Install the
square drive retaining screw (35) in the end of the square drive and tighten it.
19. Insert the retract pin (21) into the hole in the drive plate through the hole in the housing. Use a
drift and hammer to tap the pin into the plate and rod to secure the assembly. Make certain the
Pin does not protrude beyond the sides of the drive plate.
20. For TU-11, TU-20, TU-27 and TU-60 models, use a hex wrench to install the two retract pin
hole plugs (2) ush with the sides of the housing.
21. Place one end of the shroud (31) on the housing and using a hex wrench, install the shroud
screws (32) at that end.
22. Bend the shroud around the housing and install the remaining screws.
ASSEMBLY OF THE REACTION ARM ASSEMBLY
1. If the reaction arm cover (4) was removed, push it onto the end of the reaction arm (3) and
using a hex wrench, secure it by installing the two reaction arm cover screws (5).
2. Insert the reaction arm pin spring (6) in the downward, blind hole below the bore for the
reaction arm splined sleeve (10).
3. Position the reaction arm splined sleeve in the bore of the reaction arm with the small hub end
trailing and the slightly larger hole through the side of the sleeve upward. Align the holes through
the sleeve with the holes in the reaction arm.
4. Insert the reaction arm engagement pin (7), at end leading, through the sleeve into the hole
against the pin spring. Rotate the pin so that the vertical at on the end of the pin faces away
from the tool end of the arm.
5. Push downward on the engagement pin until the threaded hole in the side of the pin is visible
through the slot in the end of the reaction arm away from the tool.
6. For TU-2, TU-3, TU-7 and TU-11 models, apply a suitable thread–locking compound to the
threads of the reaction arm retract button (8) and using a screwdriver, screw the button tightly
into the threaded hole in the engagement pin.
For TU-20 model see following page.
For TU-27 and TU-60 models, apply a suitable thread–locking compound to the threads of the
reaction arm retract button (8) and using a hex wrench, screw the button tightly into the
threaded hole in the engagement pin (7).
7. Using a hex wrench, thread the reaction arm spline screw (9) into the top of the reaction arm
until the unthreaded end enters the hole in the splined sleeve and the threads bottom out.
MAINTENANCE SECTION
19/21
ASSEMBLY OF THE TU-20 REACTION ARM (page 10)
1. If the reaction arm boot (4) was removed, push it onto the end of the reaction arm and insert
the boot pin to retain the boot using a hammer.
2. Assemble gate lever to gate lever link using gate link pin.
3. Assemble gate to gate lever link using second gate link pin.
4. Insert gate spring into gate.
5. Hold gate in reaction arm and thread gate bolt through gate into reaction arm. Use a small
amount of serviceable thread locking compound on the threads. Tighten with screwdriver.
6. Place the gate lever spacers over the gate lever.
7. Swing gate lever and link into reaction arm with gate lever spacers.
8. Insert gate lever pin into reaction arm through the gate lever and gate lever spacers.
TU-20
TROUBLESHOOTING GUIDE
20/21
Trouble
Piston will not advance or
retract
Piston will not retract
Cylinder will not build up
pressure
Square Drive will not turn
Probable Cause Solution
Couplers are not securely
attached to the tool or pump
Coupler is defective Replace any defective coupler.
Defective remote control
switch
Dirt in the direction-control
valve of the pump unit
Hose connections reversed
Retract hose not connected Connect the retract hose securely
Retract pin broken Replace the broken pin and/or spring
Piston seal and/or end plug
Seal leaking
Coupler is defective Replace any defective coupler
Grease or dirt build up in the
teeth of the ratchet and
drive segment
Worn or broken teeth on
ratchet an/or drive segment
Check the coupler connections and
make certain that they are connected
Replace the switch and/or control
pendent
Disassemble the pump and clean the
direction-control valve.
Make certain the advance on the
pump is connected to the advance
on the tool and retract on the pump is
connected to the retract on the tool
Replace any defective O-rings
Disassemble the ratchet and clean the
grease or dirt out of the teeth
Replace any worn or damaged parts
Depress the advance button to
Tool tightens immediately
when turned on
Pump will not build up
pressure
Pressure reading erratic Defective gauge Replace the gauge
Nut Returns with retract
stroke
Hose connections are
reversed
Defective relief valve
Air supply too low or air hose
too small
Electric power source is too
low
Defective gauge Replace the gauge
Low oil level Check and ll the pump reservoir
Clogged lter
Ball plungers are not engaging
the drive sleeves
release the tool; shut the pump off in
the advance position and reverse the
hose connection
Inspect, adjust or replace the relief
valve
Make certain the air supply and hose
size comply with the pump manual
recommendations.
Make certain the amperage, voltage
and any extension cord size comply
with the pump manual requirements
Inspect, clean and/or replace the
pump lter
Thread the ball plungers to the
correct depth in the housing
SAVE THESE INSTRUCTIONS DO NOT DESTROY
21/21
NOTES:
1025 Conroy Place, Easton, PA. 18040 * U.S.A.
Phone: +1 610-250-5800 * Fax:+1 610-250-2700
Toll Free: 1-888-TORCUP-1
Email: sales@torcup.com * Website: www.torcup.com
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