Owner's Manual for Thern 5PA5 and 5PA10 Ensign Series Portable Davit Cranes
page 6
A11577I-0617
1.2.4
INSTALL THE WINCH HANDLE on hand winches, or connect electric
current on power winches. Refer to instructions in the Winch Owner’s
Manual.
1.2.5
INSTALL THE WIRE ROPE.
Use wire rope assemblies in the length
specified on pages 22-23.
a
REMOVE ROPE KEEPER PINS at each sheave to allow rope to be installed.
b
PASS THE WIRE ROPE over the sheave at the end of the boom.
c
PASS THE WIRE ROPE over the sheave at the mast.
d
REINSTALL ROPE KEEPER PINS to prevent the rope from escaping the
sheave rope groove. Make sure the wire rope does not make contact with the
pins. See Figure 3.
e
ANCHOR THE WIRE ROPE to the winch drum and wind 4 wraps of wire
rope onto the drum to act as anchor wraps. Refer to the instructions in the
Winch Owner’s Manual.
1.2.6
RAISE THE BOOM into position and secure in place with the boom
brace assembly as shown in Figure 5. Make sure the tip of the boom brace
adjustment screw is correctly positioned with the mast/boom brace plate.
a
IN SOME SITUATIONS it may be desirable to use the winch to raise the
boom into position. Secure the load hook at the rear of the boom as shown in
Figure 6. The wire rope must be installed correctly to prevent damage to the
rope. Once the boom brace assembly is securely in place, remove the load hook
from the rear of the boom.
1.2.7
MAKE SURE ALL CLEVIS PINS ARE PROPERLY INSTALLED with all
clevis end pins in place to prevent components from shifting during use.
1.2.8
ADJUST BOOM ANGLE for the desired reach by turning the boom brace
adjustment knob. Do not make adjustments while crane is loaded. See Figure 5.
Figure 5 – Crane Assembly
MAST
FLANGE
BEARING
BASE
MAST / BOOM
BRACE PLATE
WINCH &
HANDLE
SHEAVE
ASSEMBLY
BOOM
BOOM BRACE
ASSEMBLY
ADJUSTMENT
KNOB
MOUNTING
BRACKET
SUPPLIED
HARDWARE
WINCH
DRUM
WIRE ROPE
DIRECTION
WIRE ROPE
WIRE ROPE
KEEPER PIN
Figure 4 – Mounting Winch
Figure 3 – Sheave
CLEVIS PIN
CLEVIS END PINS
