SkyTrak 8042 Service Manual - Manual (Page 155)

Boom
3.94 Model 8042, 10042, 10054 Legacy Rev. 03/04
23. Use a hoist and sling to position the Slave
cylinder (1) onto the lower cylinder mount (2) located
on the frame. The cylinder should be positioned with
the extend and retract port fittings (3) to the outside.
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
24. Coat the lower pivot pin (4) with anti-seize
compound. Insert the pin through the base end of
the Slave cylinder. Use a tapered punch to line up
the capscrew hole in the pin with the mounting tabs
on the cylinder. Secure the lower pivot pin in place
with the capscrew (5), saved, and a new elastic
locknut (6). Tighten the elastic locknut securely.
25. Position the rod end of the Slave cylinder around the
self-aligning bearing on the outer boom.
26. Coat the upper pivot pin (7) with anti-seize
compound. Insert the pin through the rod end of the
Slave cylinder. If necessary, use a rawhide hammer
to install the upper pivot pin. Use a tapered punch to
line up the capscrew hole in the pin with the
mounting tabs on the cylinder.
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
27. Secure the upper pivot pin (7) with the capscrew (8),
saved, and a new elastic locknut (9). Tighten the
elastic locknut securely.
28. Repeat Steps 23 thru 26 to assemble the other
Slave cylinder to the other side of the outer boom.
29. Reassemble the boom proximity sensor (10) to the
right side mounting plate. With the boom properly
shimmed, position the boom assembly all the way to
the right side.
30. Insert the boom proximity sensor (10) through the
hole in the right side mounting plate (11). Assemble
the jam nut (12), saved, onto the boom proximity
sensor on the inside of the plate.
31. Adjust the inner and outer jam nuts on the boom
proximity sensor until the gap (13) between the
sensor and the boom is .12" (3 mm). Tighten the
inside jam nut to hold the boom proximity sensor in
position. Torque the jam nut to 36 lb-in (4,1 Nm).
32. Assemble the extend tube (14) to the extend port 90°
elbow (15) on the Extend/Retract cylinder (16) and
the inside bulkhead fitting (17) on the right side of
the outer boom. Hand-tighten the tube fitting to the
90° elbow. Reposition the tube as needed to align
the other end of the tube with the bulkhead fitting.
Tighten the tube end at the bulkhead fitting and then
tighten the tube end at the 90° elbow.
33. Assemble the retract tube (18) to the retract port 90°
elbow (19) on the Extend/Retract cylinder (16) and
the outside bulkhead fitting (20) on the right side of
the outer boom. Hand-tighten the tube fitting to the
90° elbow. Reposition the tube as needed to align
the other end of the tube with the bulkhead fitting.
Tighten the tube end at the bulkhead fitting and then
tighten the tube end at the 90° elbow.
MH1210
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MH1390
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