Manitowoc Grove TMS700E User Manual

Grove Published 01-29-2015, Control # 512-01 4-15
TMS700E SERVICE MANUAL BOOM
4
• In standing ropes, more than two broken wires in one lay
in sections beyond end connections or more than one
broken wire at an end connection.
Adjustment
At near fully extended boom length, during sudden extension
after retracting the boom some distance, and with high
telescoping speeds, the extension cables may slap the
inside of the boom section. This will make a somewhat
audible noise, however this will not cause any damage and is
acceptable. If the cables do not make a slapping noise under
these conditions, it is an indication that the extension cables
may be too tight and should be readjusted. Be aware that
there may also be a similar noise made by the telescope
cylinder rod mount at the rear of Section 1, and confusion
between the two could be experienced.
NOTE: The extension cables must be adjusted properly
before the retract cables can be adjusted.
1. Extend and set the outriggers, ensuring the crane is
level.
2. Ensure the boom is over the rear and at a horizontal
position (boom angle elevation 0 degrees).
3. With Section 2 extended and Section 3 retracted, extend
the boom approximately 15 cm (6 in). This will cause a
slack condition in the retract cables.
4. Tighten the retract cable adjusting nuts at the front of
Section 4 to approximately 1.4 Nm (1.0 ft-lb).
5. Extend the boom approximately 15 cm (6 in) and then
retract the boom completely. This will create the loosest
condition for the extension cables.
6. Using the adjusting nuts on extension cable ends, adjust
the cables so they are approximately 15 mm (0.56 in) off
the top of the telescope cylinder.
NOTE: Step 6 should be performed with the boom
horizontal and by visually looking through the back
of Section 1 or through the access holes on Section
1.
7. Lock the adjustments with the jam nuts.
NOTE: During retract cable adjustments, Section 2 must
remain fully extended.
8. Extend the boom until the Section 3/Section 4 extends
several centimeters (inches).
9. Retract the boom until either Section 4 just contacts
Section 3 stop block or Section 3 just contacts Section 2
stop block.
10. Check the gap between the stop blocks and the boom
sections. If there is a gap between Section 2’s stop block
and Section 3 of more than 3 mm (0.125 in), loosen the
retract cable. If there is gap between Section 3’s stop
block and Section 4, tighten the retract cable slightly.
11. Extend the boom approximately 15.2 cm (6 in). Retract
the boom again until one of the stop blocks just contacts
its boom section.
12. Again check the gap as in step 10 and if necessary,
make further adjustments.
13. Repeat steps 11 and 12 until there is a 3 mm (0.125 in)
gap at Section 3’s stop block when Section 4’s stop
block has just made contact.
14. Lock the retract cable adjustments with the jam nut.
TELESCOPE CIRCUIT
Description
The boom telescope circuit consists of the telescope
hydraulic remote controller, telescope directional control
valve, holding valve, and the upper and lower telescope
cylinders.
NOTE: If the crane is equipped with an auxiliary hoist, the
telescope function is controlled by a foot pedal
instead of a controller.
The telescope control valve is the closed spool type and is
described under Valves, page 2-19.
Refer to Hydraulic Remote Control Valve, page 2-34 for a
complete description of the hydraulic remote controller.
Both boom telescope cylinders have a 15.2 cm (6.0 in) bore.
Foreign material is prevented from entering the cylinder by a
wiper seal during rod retraction. O-ring seals prevent internal
and external leakage. Refer to Cylinders, page 2-52 for a
complete description of the telescope cylinder.
A holding valve is threaded into a port block on the rod end of
the upper telescope cylinder. A holding valve is threaded into
the port block on the barrel end of the lower telescope
cylinder. The holding valves function during the retraction,
extension, or holding operation. When holding the boom
CAUTION
When adjusting cables, hold the cable end and turn the
nut. Do not turn cable. Turning cable while adjusting will
result in damage or failure of cable.
CAUTION
Over tightening of the retract cable will damage the cable.
Take care when retracting the boom fully, while adjusting
the cable, to avoid full boom retraction if Section 4
contacts its stop block more than 3 mm (0.125 in) before
Section 3 contacts its stop block on Section 2.
Reference Only

Manitowoc Grove TMS700E Specifications

General

Brand	Manitowoc
Model	Grove TMS700E
Category	Construction Equipment
Language	English