BOOM RT9130E SERVICE MANUAL
4-14 Published 08-25-09, Control # 077-04
70. If necessary, remove one cotter pin from the shaft that
holds the cylinder mount to the lower cylinder.
NOTE: The telescope cylinder assembly weighs
approximately 998 kg (2200 pounds).
71. Remove the shaft and cylinder mount from the lower
cylinder. If necessary, remove the flat head screws
securing each pad to the cylinder mount.
72. Remove the two capscrews and hardened washers
securing the extend cable keeper plate to the rear of the
fly. Remove the keeper plate and remove the extend
cable ends from the slots in the fly.
73. Continue to slide the upper cylinder out of the fly making
sure that the cables are moving with the cylinder. Slide
the telescope cylinder outward until the foot weld at the
end of the upper telescope cylinder is approximately two
feet from the rear of the fly.
74. Remove the two capscrews and washers from each side
of the foot weld and remove both wear pad supports. If
necessary, remove two flat head screws and pad from
each support.
75. Continue to slide the telescope cylinder assembly out of
the fly section. Raising the rear of the fly section and
lowering the rod end of the cylinder will aid in removal.
76. On the front of the fly section, remove the two nuts and
hardened washers from the end of each retract cable
and remove the retract cables from the fly section.
77. Remove the four capscrews and hardened washers
securing the guide block to the bracket on the rear of the
boom nose.
78. Remove the two capscrews and washers on both sides
of the sheave mount on the end of the upper cylinder
that holds the cable guide and shaft plates. Remove the
cable guide and shaft plates.
79. Remove the two capscrews and washers securing the
extend cable retainer plate to the front of the sheave
mount. Remove the retainer plate.
80. Remove the five extend cables from the sheave
assembly.
81. Remove the grease fitting from the shaft. Remove the
sheave shaft and the sheave assembly from the
mounting assembly.
82. Remove the four capscrews and hardened washers
securing the sheave mounting assembly and the
support foot to the front of the telescope cylinder.
Remove the two capscrews and washers holding the
cylinder support foot to the sheave mount. Remove the
sheave mounting assembly and the support foot.
83. If necessary, remove the two screws securing each wear
pad to the support foot and remove the wear pads.
84. Remove the two capscrews and washers that retain the
plate cover to the sled weld. Remove the plate cover and
remove the five extension cables.
85. If removal of the boom nose sheaves are required, refer
to BOOM NOSE SHEAVES - Removal in this section.
86. Refer to BOOM EXTENSION AND RETRACTION
CABLE MAINTENANCE in this section for cable
inspection.
Boom Nose Sheaves
Removal
1. Remove the clip pins from the cable retainer pins and
remove the cable retainer pins from the upper and lower
part of the boom nose.
2. Flatten out the tab on the lockwasher.
3. Backoff locknut until there is no pressure on the
lockwasher.
4. Remove the bolt, washer, and nut securing the upper
boom nose sheave shaft. Remove the collar.
NOTE: The boom nose sheave shafts weigh
approximately 73 kg (161 pounds) each. The boom
nose sheaves weigh approximately 13 kg (28
pounds) apiece.
5. Carefully pull the upper boom nose sheave shaft from
the boom nose, removing the spacers, shims, and boom
nose sheaves.
6. Repeat steps 2 and 3 and remove the lower boom nose
sheave shaft.
7. Remove the shim, keyed washer and locknut from both
sheave shafts.
Installation
NOTE: The boom nose sheave shafts weigh
approximately 73 kg (161 pounds) each. The boom
nose sheaves weigh approximately 13 kg (28
pounds) apiece.
1. Install the spacers and sheaves onto the sheave shaft
while installing the sheave shafts into the boom nose.
NOTE: The lockwasher can be used more than once but
must be replaced if not in good condition.
NOTE: Install the lockwasher onto the sheave shaft with
the tabs facing out.
CAUTION
Do not install the boom nose sheaves over the threaded
end of the boom nose sheave shaft.
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