Owner's Manual for Thern 5PA5 and 5PA10 Ensign Series Portable Davit Cranes
page 5
A115771-0617
BOOM
MAST
WINCH MOUNTING PLATE
ROTATION HANDLE
SHEAVE ASSEMBLY
5PA5 COMPONENTS IN SHIPPING CARTON
FLANGE BEARING
BOOM BRACE
ASSEMBLY
1.2
Assembling the Crane
When installing the mast, ensure the mast is fully and properly seated on the
pin in the bottom of the base.
When installing the boom, hold the boom securely so it does not move abruptly
causing damage or injury.
1.2.1
STUDY PARTS DRAWINGS to understand how the crane is assembled. See
pages 18-21.
1.2.2
LUBRICATE PINS and other components prior to assembly. See Section 3.2
- Lubricating the Crane
1.2.3
INSTALL THE BASE. See Section 1.1 for additional information and crane
overturning moments and mounting bolt reaction forces.
1.2.4
INSTALL THE BEARING in the base. Position the bearing so that the
alignment pin and notch in base are aligned. Bearing must set level on base.
See Figure 1.
1.2.5
ASSEMBLE THE CRANE in the following order.
a
FASTEN THE WINCH to the mounting plate using the fasteners provided. On
some models you will need to use an additional winch adapter plate and fasteners
provided to fasten the winch to the crane.
Make sure the winch is positioned
correctly with the winch drum facing toward the load. See Figure 4
.
b
INSTALL THE MAST in the base. Move the mast side-to-side to make sure
the bottom of the mast properly seats on the pin in the bottom of the base
.
The crane will not be stable unless properly seated. See Figure 5.
c
INSTALL THE HANDLE onto the mast using the longer clevis pin and
clevis end pins provided. There are three positions for the winch. Locate the
clevis pin and handle for the desired winch position.
d
INSTALL THE WINCH onto the mast. Rotate into position and secure with
provided clevis pin and clevis end pins.
Make sure the winch is positioned
correctly, with the mast/boom brace plate located on the opposite side as
the winch as shown in Figure 5.
e
FASTEN THE BOOM to the mast using the clevis pin and clevis end pins
provided.
Make sure the boom is positioned correctly as shown in Figure 5.
f
INSTALL THE SHEAVE ASSEMBLY on the boom in the desired position
for the required hook reach. Secure in place using the clevis pin and clevis
end pins provided. See Figure 5.
Figure 2 – Crane Packaging
Figure 1 – Base Bearing
5PA10
5PA5
Important!
• Inspect the crane during assembly
according to the Instructions for
Periodic Inspection. This will
give you a record of the condition
of the crane with which to
compare future inspections.
• Save all boxes and crates that the
crane was shipped in, use them
again if you need to repackage
the crane.
• Contact the factory immediately if
any parts are missing or damaged.
• Do not overtighten fasteners,
this may strip threads or cause
damage to other parts.
