Enerpac HMT Series, Operation And Maintenance Manual

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L4478_a 19
• Reassembly and Installation
In the following steps, coat all O-rings and
seals with silicone grease before installation.
Do not use excessive force when installing
the piston rod (3) in the following steps. Excessive force
may cause damage to these component and also may
damage the sealing faces within the wrench.
• Insert the O-ring (20) and grub screw (8) into the
relief shaft.
NOTE: Ensure the grub screw (8) and O-ring (20)
have been installed after Loctite 577 has been
applied. Loctite must be fully cured before testing.
• Fit bush (5) and rod end seal (14) into the drive unit
body piston shaft (1)
• Insert the piston O-ring (16) into the lower groove
on the piston rod (3) followed by the piston cup
seal (13) into the upper groove. Insert the piston
rod (3) into the drive unit body (1).
• Apply threadlock to the Rod End (4) threads and
install into the Piston Rod (3), holding the Piston
Rod with a spanner to prevent rotation.
NOTICE
NOTICE
8
✴
20
✫
16
✫
13
✫
15
✫
2
18
17
14
✫
5
✫
11
4
� �
6
12
3
�
10
✽⁂
1
7
9
19
✫
Apply ISO 10 grade oil to O-rings.
✽
Apply Loctite 243 Thread Sealant
Apply Loctite 577 Thread Sealant
Apply Threadlock
• Install the back cap thread O-ring (15) into the
groove in the back cap body (2).
• Attach the back cap (2), and secure with the eight
socket head cap screws after applying Loctite 243
Thread Sealant (10). Tighten the socket head cap
screws to the following Torque values:
ο HMT1500 : 6 Ft/lbs [8 Nm]
ο HMT3500 : 14 Ft/lbs [19 Nm]
ο HMT7500 : 30 Ft/lbs [41 Nm]
• Place the bottom retaining pin lanyard (17) onto the
back cap and secure with the socket button head
cap (18).
• Fit the top retaining pin (6) and retaining ring (11).
• If removed, reinstall the hydraulic swivel and swivel
post. Refer to Section 7.2.1.
• Assembly with the appropriate cassette assembly,
secured with bottom retaining pin (11) and ball end
screw (9); and perform hydraulic pressure testing
before placing the wrench into service. Refer to the
procedure in Section 7.2.6.
Figure 19: Exploded HMT
⁂•
See 7.3.2, Reassembly and Installation for Torque Values.