JLG sky trak mmv Service Manual page 167

d. Outer Boom Installation
WARNING:
wear with reinforced toe caps and slip-resistant
soles. Failure to comply can result in foot or
other bodily injury from slipping or falling.
WARNING:
object without the help of at least one assistant
or a suitable sling and hoist. Failure to comply
can result in death or serious personal injury.
IMPORTANT: Light lubrication of the boom wear sur-
faces with a rust inhibitor/lubricant such as LPS 3, or
equivalent, is recommended to keep the boom wear sur-
faces lubricated properly. Light lubrication of the boom
wear surfaces is also recommended in salt air climates,
and when the vehicle is stored, to help prevent rusting.
Note: If new boom pivot bearings have been installed in
the vehicle frame, the fracture (16) in the bearing race
must be positioned at the position shown in the illustration.
11
10
16
9
8
7
1. Use a suitable overhead lifting device and sling
attached to the loop (15) on top of the outer boom.
Attach another sling around the outer boom near the
center point and secure it to the hoist. Remove slack
from the slings.
Model MMV Rev. 12/04
Wear protective foot-
NEVER lift a heavy
12
1
2
3
4
5
6
2. Carefully raise the outer boom into position on the
vehicle chassis.
3. Coat the boom pivot pin (12) with anti-seize
compound and install the boom pivot pin (12),
spacer rings (14) and the number of shims (13) as
previously noted in the removal procedure.
Add or remove shims as required until a maximum
total gap of .10" (2.5 mm) is obtained. Balance the
number and thickness of shims equal on both sides,
if an additional (odd) shim must be added to obtain
the proper gap, add to the right side of the boom.
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
4. Secure the pivot pin with a 5/8-11 x 7" capscrew (10)
and a new 5/8-11 elastic locknut (11). Torque nut to
150 lb/ft (203 Nm).
Note: ALWAYS use a new external tooth lockwasher to
help ensure proper fastening.
5. Install one spacer (8), one new external tooth
lockwasher (6) and one bearing nut (7) on each side
of the pivot pin. Torque the bearing nut (7) to 80 lb/ft
(108 Nm). Bend the tabs on the external tooth
lockwasher (6) in the open slots in the bearing nut.
6. Install one cover (5), one washer (4) and one
capscrew (3), on each side of the pivot pin (9).
7. Place a block or support within the chassis near the
front of the outer boom.
8. Lower the outer boom onto the block or support and
remove the slings and hoist or overhead crane.
9. Install the boom proximity sensor (1) into the tab at
MT08212
the top of the frame.
Boom
4.23