Table of Contents
Rev. 10/30/2020
WTJ-20 MANUAL
Table of Contents
Copyright 2020 Vestil Manufacturing Corp.
Page 7 of 11
INSTALLING THE CRANE ON A VEHICLE
Refer to the
Step 1: Contact the vehicle manufacturer to determine the
appropriate place to install the crane as well as the hardware that
should be used to fasten the crane to the vehicle. (Bolt holes in the
mounting plate are
9
/
16
” diameter to accept bolts up to
1
/
2
”). When
choosing an installation site, consider the following factors:
a. The vehicle must be able to support the combined weight of
the crane and a load weighing 125% of the capacity, i.e. 2,000
lb. x 1.25 = 2500 lb. (1136 kg)
b. The installation location must also be able to withstand the
dynamic forces exerted on it by the jib as the vehicle moves.
c. The boom must be able to rotate freely, i.e. without running
into the sides of the vehicle.
d. If installing the crane in a fixed position (not on a vehicle; see
installation diagrams on
), the supporting surface
must be even, level, and capable of supporting the weight of
the crane plus a 125% capacity load.
Step 2: The jib should remain completely assembled during the
installation. Use the mounting plate of the mast receiver as a
template for marking the locations of the bolt holes on the vehicle
surface. Drill
9
/
16
” holes in the locations of the markings for the
anchoring hardware.
Step 3: Align the bolt holes in the mounting plate with the holes
drilled in step 2. One person should stabilize the jib while the other
fastens the mounting plate to the vehicle using the hardware and
any backing or stiffeners recommended by the vehicle
manufacturer.
Step 4: Lift the end of the jib and pin it to the mast at the desired
angle. See
mast is able to rotate freely through the necessary range by
carefully pushing the end of the boom in both directions.
Step 5: Connect the power cord to the power supply. On DC-
powered units, the power supply cord and pendant control cable
must be plugged into the winch.
Step 6: Lower and raise the cable hook using the handheld pendant
controller. Watch the cable and confirm that it smoothly spools off of
and onto the winch drum.
Step 7: Load test the jib by using it to lift a test weight equal to
125% of the rated capacity (2,500 lb.). Inspect both the crane and
the vehicle (or supporting surface) after performing the load test.
Look for cracks, warps, and other forms of damage at and around
the installation site. Repair the site, if necessary, and perform
another load test to confirm that problems are resolved.
Overhead View of Mast Receiver
9
/
16
” bolt hole
Mounting plate at bottom of
mast receiver
Mast
Mounting
plate with
9
/
16
” bolt
Boom
Load
hook
Mast
receiver
Pin boom at desired angle
(see pages 2 & 3)
Pivot
pin
Angle
adjust-
ment pin
Knob
FUNCTION TESTS
Verify that the jib operates normally by performing the tests below. If an issue is discovered, tag the crane “Out of
Service”. Restore the crane to normal operating condition before returning it to service.
1. Test the mast bearing: Rotate the boom in both directions. Make sure that it rotates smoothly. Listen for unusual
noises. If the crane wobbles or is unusually noisy as it rotates, remove the mast and grease the bearing at the
bottom. If lubrication does not resolve the problem, the bearing might need to be replaced. Contact the factory to
discuss the problem and to order replacement parts.
2. Test the winch: Lower and raise the load hook. Make sure that the hook moves at a constant rate. The cable
should not bind as the winch operates.
