BOOM TMS700E SERVICE MANUAL
4-14 Published 01-29-2015, Control # 512-01
4. Retract and extend the boom; check for the high point
where the boom has brushed the wear pads at the
widest point.
5. Retract the boom sections to align the high point on the
boom section with the adjacent wear pads.
6. Add or subtract shims as necessary.
7. Attach a weight and extend the boom full length. Check
for side deflection.
Example: If the boom deflects to the left, the top left wear pad
would have shims added and the top right wear pad would
have shims removed.
Cam Operated Check Valve Adjustment
There are two cam operated check valves mounted on the
back of Section 2 boom section. When the boom is fully
retracted or Section 2 is fully extended, the valve on the right
side of the boom is held open to supply flow to the lower
telescope cylinder. When Section 2 boom section is fully
extended, the valve on the left side of the boom opens to
supply flow to the upper telescope cylinder. For a short
period of time, both valves are open because the bottom
cylinder is fully extended before the upper cylinder starts to
extend. As Section 3 starts to extend, the valve on the right
side closes to shut off the flow to the lower telescope
cylinder.
1. Ensure the extend and retract cables are adjusted.
2. Extend the boom until Section 2 is fully extended and
Section 3 is against the stop block of Section 2.
3. Access the check valves through the hole on each side
of Section 1.
4. Left side valve: on the left side of Section 1, adjust the
nuts on the adjusting bolt to move the trigger weldment
causing the pusher bar to just contact the valve stem.
Continue to adjust the nuts until the pusher bar
depresses the valve stem approximately 10 mm
(0.39 in). Tighten the nuts.
5. Right side valve: through the access hole in Section 1 on
the right rear of Section 2, loosen the lock nut and adjust
the bolt until it just contacts the valve stem. Continue to
adjust the bolt until it depresses the valve stem
approximately 10 mm (0.39 in). Tighten the lock nut.
Guide Block Adjustment
1. Align and service the boom per Boom Alignment and
Servicing, page 4-13.
2. Rotate the guide block at the top of Section 1, Section 2,
and Section 3 so that the guide block is within 0 to 2 mm
(0 to 0.078 in) of the welded block on the top of the next
section.
NOTE: The guide block hole pattern is so designed that
the guide block has four mounting positions which
provide 3.175 mm (0.125 in) incremental settings.
3. After obtaining proper clearance, tighten the four bolts.
4. Rotate the guide block at the bottom of Section 4 and
Section 3 so that the guide block is within 0 to 2 mm (0 to
0.078 in) of the welded guide rail on the front of the next
section. These guide blocks are the same as the ones
used on top. After obtaining proper clearance, tighten
the four bolts.
BOOM EXTENSION AND RETRACTION
CABLE
Maintenance
NOTE: For more detailed information concerning
maintenance of the extension and retraction
cables, refer to Wire Rope, page 1-16.
Inspection
The following information is taken from a National
Consensus standard as referenced by Federal Government
Agencies, and as recommended by Manitowoc Cranes.
All wire rope will eventually deteriorate to a point where it is
no longer usable. Wire rope shall be taken out of service
when any of the following conditions exist.
• In running ropes, six randomly distributed broken wires
in one lay or three broken wires in one strand in one lay.
• Wear of one-third the original diameter of outside
individual wires. Kinking, crushing, bird caging, or any
other damage resulting in distortion of the rope
structure.
• Evidence of any heat damage from any cause.
• Reductions from nominal diameter of more than 5%.
CAUTION
When extending and retracting the boom during
alignment, movement should be stopped if a restriction is
encountered, and wear pads adjusted as necessary to
provide free travel of the affected boom section(s).
CAUTION
Never handle wire rope with bare hands.
Reference Only
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