Manitowoc Grove CD3340B Service Manual page 301

CD3340B/YB4411
14. See previous WARNING. Secure the 2nd boom section
from pulling off the supports. Pull 3rd boom assembly
out far enough to attach a sling and overhead crane. Pull
the 3rd boom section about half way out. Remove four
capscrews (45) and lockwashers (44). Remove two
boom slide pads (43). Pull the 3rd boom assembly from
the 2nd boom assembly. When the 3rd boom assembly
is almost out, raise the boom tip end. This will allow the
boom assembly to clear an internal plate that will
prevent the boom from being pulled straight out.
15. Place the 3rd boom assembly on suitable supports.
16. Pull the telescope cylinder assembly (25) out, keeping
tension on the extend chain, until the roller end of the
telescope cylinder assembly is visible through the center
access hole.
17. Through the access hole remove four capscrews (19),
lockwashers (20) and flat washers (21). Remove end
guide bracket (15). Check slide pad (16) and if
excessively worn or damaged replace it.
18. Lift up on telescope cylinder assembly, remove four
capscrews (16), lockwashers (15) and guide pad (17,
Figure 11-10).
19. Pull the telescope cylinder assembly out of the 3rd boom
section far enough to see chain end (23, Figure 11-10).
Remove two cotter pins (22) and pin (21). Remove chain
end (23) and extend rod (24) as an assembly. Note the
distance from chain end (23) to end of extend rod (24)
for base setting at assembly.
20. Continue pulling telescope cylinder assembly (25) out of
the 3rd boom section.
21. Place the telescope cylinder assembly on suitable
supports.
22. Remove capscrew (10, Figure 11-10) and pin (11).
Remove extend chain (20) and chain end (31) from the
3rd boom assembly.
23. If the telescope cylinder extend roller assembly needs to
be disassembled, use Figure 11-10 as a guide. For
cylinder repair, see Section 4.
Inspection
Inspect all boom slide pads for wear and/or damage.
Replace if necessary.
Inspect the extend and retract chains for damage. See chain
inspection in Section 5.
Assembly
NOTE: If new boom sections are being installed the holes
for threaded fasteners are tapped at the factory
and covered with paint. Before assembling the
boom sections, run a tap through all holes to
remove the paint.
GROVE
NOTE: Coat the threads of all fasteners with an anti-seize
compound, except where use of Loctite 243 is
indicated.
Assembling the Telescope Extend Roller Assembly
Refer to (Figure 11-10) Telescope Cylinder and Extend
Roller Assembly.
The following procedure needs only be done if the telescope
extend roller assembly was disassembled.
1. Attach the extend chain roller bracket (11) to the base
end of telescope cylinder (5) using capscrews (10) and
lockwashers (9). Make sure the holes for pin (13) are
parallel to the eccentric hubs on telescope cylinder (5).
2. If bearings (7) were removed, install the bearings into
extend chain roller (6) as follows:
a. Remove the inner ring from the bearings (7) and
coat the rollers with a Lithium Base, E.P. No. 2
bearing grease.
b. Insert the inner rings into the bearings. Install the
bearings in roller (6).
3. Using roller pin (13), install the extend chain roller
assembly and two nylatron spacers (8) into the chain
roller bracket (11).
4. Secure the extend roller pin (13) with two retaining rings
(14).
5. If grease fittings (12) were removed, install them into the
ends of pin (13). Apply Lithium Base, E.P. No. 2 bearing
grease to the two grease fittings.
6. Install cylinder end slide pad (16) to end guide bracket
(15) using two capscrews (18) and lockwashers (17).
7. Do not install end guide bracket assembly at this time. It
will be installed later during the boom assembly
procedure.
Assembling the Retract Roller Assembly
Refer to three-section boom assembly diagram at the end of
this manual for all part numbers in this section.
The following procedure needs only be done if the retract
roller assembly (37) was disassembled.
1. If bearings (70) were removed, install the bearings into
retract chain roller (71) as follows:
a. Remove the inner ring from the bearings (70) and
coat the rollers with a Lithium Base, E.P. No. 2
bearing grease.
b. Insert the inner rings into the bearings. Install the
bearings in roller (71).
2. Using roller pin (73), install the extend chain roller
assembly and two nylatron spacers (69) into roller
support bracket (75).
Published 04/07/2015 Control # 569-00
STRUCTURAL
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11-9